Zircon U-Pb Geochronology, Geochemistry Characteristics and Geological Significance of the Solonker Ophiolite, Inner Mongolia

doi:10.19657/j.geoscience.1000-8527.2020.011

Abstract

Abstract:

To deepen our understanding on the Late Paleozoic tectonics of the eastern Central Asian Orogenic Belt, a study of the petrology, geochronology and geochemistry of fresh basalts and gabbros in the Solonker ophiolitic mélange belt were reported. Zircon grains from these basalts and gabbros yielded²⁰⁶Pb/²³⁸U ages of (276.7±2.7) Ma and (274.1±3.2) Ma, respectively, indicating an Early Permian emplacement age. Both the basalts and gabbros are tholeiitic, and have low Mg^# values of 41-50 and 62-65, respectively, both below the primary magma value. Meanwhile, the basalt and gabbro samples fall along a fractionation trend in the Harker diagrams, suggesting a dominant role of fractional crystallization in the magma evolution.The Th/La, Th/Ce and Lu/Yb ratios of the two rock types are below those of the average continental crust, but similar to those of typical mantle-derived magmas. Therefore,it is inferred that crustal contamination had little influence on the mafic magmas.Rare earth element (REE) compositions show that the basalts are of the N-MORB-type with light REE (LREE) depletions,probably originated from 5%-10% partial melting of the depleted spinel lherzolite mantle. Gabbros are slightly LREE-depleted with a flat REE distribution pattern, and have clearly lower total REEs (Σ REEs) than N-MORB, probably due to a higher degree of partial melting than the basalts in the source region.In addition, both rock types are highly enriched in large ion lithophile elements (LILEs: Rb, Sr, Ba, Pb) and depleted in high-field-strength elements (HFSEs: Nb, Ta), similar to typical island arc magmas.These features imply that their magmas were affected by subduction-related fluids, or were derived from the melting of subducting sediments.The geochemical characteristics indicate that the Solonker ophiolites belong to the supra-subduction zone (SSZ)-type, and may have formed in an intra-oceanic backarc basin.This indicates that intra-oceanic subduction still persisted till at least the Early Permian in the study area.Comprehensive analyses suggest that the Paleo-Asian Ocean(PAO) was closed in the Late Permian to Early Triassic along the Solonker-Xar Moron suture zone.

Key words: ophiolite, geochronology, geochemistry, Paleo-Asian Ocean, Solonker, Inner Mongolia

CLC Number:

LIU Zhihua, GU Xuexiang, ZHANG Yongmei, WANG Jialin, LIU Tao, WANG Wendong, ZHAO Wei, CHEN Yang. Zircon U-Pb Geochronology, Geochemistry Characteristics and Geological Significance of the Solonker Ophiolite, Inner Mongolia[J]. Geoscience, 2020, 34(03): 399-417.

Figures/Tables 14

Fig.1 Regional geotectonic map (a), schematic map of regional tectonics (b) and geological map of the Uzhur Shaobute (c)

Fig.2 Field geological photos of the Solonker ophiolite components and their contact relationship

Fig.3 Geological profile in the Uzhur area, showing the contact relationships among ophiolite components and those between the northern and southern mélanges

Fig.4 Hand-specimen photos and thin-section microphotographs, showing the petrographic characteristics of representative rock types in the Solonker ophiolite

Table 1 LA-ICP-MS zircon U-Pb data of basalts and gabbros in the Solonker ophiolite

点号	含量/10^-6			Th/U	同位素比值						年龄/Ma
点号	Th	U	Pb	Th/U	²⁰⁷Pb/ ²⁰⁶Pb	1σ	²⁰⁷Pb/ ²³⁵U	1σ	²⁰⁶Pb/ ²³⁸U	1σ	²⁰⁷Pb/ ²⁰⁶Pb	1σ	²⁰⁷Pb/ ²³⁵U	1σ	²⁰⁶Pb/ ²³⁸U	1σ
SL-PM2-Zr2-1	58	77	24	0.75	0.088 4	0.002 6	2.891 9	0.085 3	0.236 9	0.003 2	1 390.7	27.8	1 379.8	22.3	1 370.6	16.8
SL-PM2-Zr2-2	195	378	34	0.51	0.053 4	0.002 0	0.527 5	0.017 9	0.071 8	0.000 8	346.4	87.0	430.1	11.9	447.0	5.1
SL-PM2-Zr2-3	115	219	20	0.52	0.055 3	0.002 1	0.556 9	0.022 0	0.072 9	0.001 0	433.4	82.4	449.5	14.3	453.3	6.3
SL-PM2-Zr2-4	136	230	149	0.59	0.159 9	0.003 0	10.442 2	0.228 6	0.470 0	0.005 2	2 454.0	32.9	2 474.8	20.4	2 483.6	22.6
SL-PM2-Zr2-5	145	251	14	0.58	0.053 9	0.002 4	0.323 0	0.015 0	0.043 3	0.000 6	368.6	100.0	284.2	11.5	273.1	3.6
SL-PM2-Zr2-6	74	130	12	0.56	0.056 7	0.002 4	0.568 7	0.023 2	0.073 0	0.001 1	479.7	94.4	457.1	15.0	454.0	6.5
SL-PM2-Zr2-7	32	75	4	0.42	0.057 9	0.003 9	0.342 2	0.021 6	0.043 0	0.000 9	524.1	147.0	298.8	16.3	271.4	5.6
SL-PM2-Zr2-8	121	282	14	0.43	0.054 3	0.00 3 0	0.293 7	0.016 2	0.039 0	0.000 5	388.9	125.9	261.5	12.7	246.7	3.3
SL-PM2-Zr2-9	108	126	8	0.86	0.053 2	0.003 6	0.318 7	0.020 4	0.044 3	0.000 9	338.9	153.7	280.9	15.7	279.5	5.5
SL-PM2-Zr2-10	120	208	12	0.58	0.054 0	0.002 5	0.337 0	0.015 8	0.045 0	0.000 6	368.6	108.3	294.9	12.0	283.9	3.8
SL-PM2-Zr2-11	83	128	7	0.65	0.051 0	0.003 8	0.304 2	0.021 3	0.043 5	0.000 8	242.7	202.8	269.7	16.6	274.7	5.1
SL-PM2-Zr2-12	109	224	20	0.48	0.056 5	0.002 4	0.566 4	0.023 4	0.072 4	0.000 9	472.3	92.6	455.7	15.2	450.4	5.3
SL-PM2-Zr2-13	124	281	25	0.44	0.056 2	0.002 1	0.565 8	0.021 8	0.072 4	0.001 1	461.2	81.5	455.3	14.1	450.9	6.4
SL-PM2-Zr2-14	91	172	16	0.53	0.055 6	0.002 5	0.544 4	0.023 1	0.071 2	0.000 9	438.9	134.2	441.3	15.2	443.3	5.6
SL-PM2-Zr2-15	83	138	13	0.60	0.056 5	0.003 0	0.563 0	0.029 3	0.072 4	0.001 5	472.3	116.7	453.5	19.0	450.8	9.2
SL-PM2-Zr2-16	42	101	9	0.42	0.055 0	0.003 5	0.542 5	0.032 4	0.072 0	0.001 3	413.0	108.3	440.1	21.3	448.5	8.0
SL-PM2-Zr2-17	116	223	14	0.52	0.052 4	0.001 9	0.361 3	0.012 9	0.050 2	0.000 7	305.6	81.5	313.2	9.6	315.8	4.5
SL-PM2-Zr2-18	168	219	13	0.77	0.053 6	0.002 2	0.323 6	0.014 2	0.043 9	0.000 8	353.8	92.6	284.7	10.9	276.7	4.9
SL-PM2-Zr2-19	90	146	14	0.62	0.056 1	0.002 8	0.546 6	0.027 3	0.071 4	0.001 2	453.8	109.2	442.8	17.9	444.6	7.2
SL-PM2-Zr2-20	120	207	12	0.58	0.050 4	0.002 4	0.305 7	0.014 8	0.044 0	0.000 7	213.0	111.1	270.8	11.5	277.5	4.4
SL-PM2-Zr2-21	34	76	7	0.45	0.055 5	0.004 2	0.540 9	0.036 9	0.071 1	0.001 4	435.2	168.5	439.0	24.3	443.0	8.4
SL-PM2-Zr2-22	124	240	21	0.52	0.055 1	0.002 0	0.553 1	0.023 0	0.072 0	0.001 2	416.7	83.3	447.0	15.0	448.2	7.2
SL-PM2-Zr2-23	93	176	16	0.53	0.055 1	0.002 1	0.549 8	0.021 2	0.072 1	0.001 1	413.0	83.3	444.9	13.9	448.7	6.4
SL-PM2-Zr2-24	135	235	21	0.58	0.054 8	0.001 9	0.546 5	0.019 7	0.071 7	0.001 1	405.6	75.9	442.7	12.9	446.2	6.6
SL-PM2-Zr2-25	82	190	17	0.43	0.055 3	0.001 9	0.549 4	0.018 9	0.071 9	0.000 9	433.4	77.8	444.6	12.4	447.6	5.5
SL-PM2-Zr2-26	180	266	25	0.68	0.056 5	0.002 2	0.558 6	0.018 7	0.072 0	0.001 2	472.3	89.8	450.6	12.2	448.5	7.5
SL-PM2-Zr2-27	122	241	22	0.51	0.056 6	0.002 8	0.555 3	0.026 0	0.071 3	0.001 0	476.0	112.0	448.5	17.0	443.7	6.0
SL-PM2-Zr2-28	84	153	8	0.55	0.051 5	0.003 3	0.299 3	0.017 7	0.043 4	0.000 8	261.2	150.0	265.9	13.8	274.2	4.9
SL-PM2-Zr2-29	129	212	12	0.61	0.050 4	0.002 3	0.304 8	0.014 2	0.043 9	0.000 7	213.0	107.4	270.1	11.0	276.7	4.2
SL-PM2-Zr2-30	77	128	7	0.60	0.053 3	0.003 9	0.325 1	0.024 1	0.044 3	0.001 0	342.7	164.8	285.8	18.4	279.6	5.9
SL-PM2-Zr2-31	144	212	12	0.68	0.052 4	0.002 7	0.316 2	0.016 8	0.043 4	0.000 8	301.9	116.7	279.0	13.0	273.7	4.9
SL-LT-Zr3-1	159	407	22	0.39	0.051 5	0.001 9	0.308 8	0.010 8	0.043 7	0.000 7	261.2	83.3	273.2	8.4	275.6	4.4
SL-LT-Zr3-2	109	355	19	0.31	0.055 5	0.002 1	0.334 8	0.013 3	0.043 8	0.001 0	431.5	88.0	293.2	10.1	276.2	6.2
SL-LT-Zr3-3	536	1 070	58	0.50	0.054 6	0.001 8	0.320 1	0.010 0	0.042 5	0.000 5	398.2	76.8	282.0	7.7	268.0	2.8
SL-LT-Zr3-4	219	542	30	0.40	0.055 2	0.002 0	0.332 9	0.012 8	0.043 8	0.000 8	420.4	79.6	291.7	9.8	276.1	5.2
SL-LT-Zr3-5	55	123	37	0.44	0.087 7	0.002 2	2.906 4	0.074 5	0.239 1	0.003 1	1 376.9	52.8	1 383.6	19.4	1 381.8	16.1
SL-LT-Zr3-6	224	369	152	0.61	0.105 4	0.002 2	4.533 0	0.105 6	0.309 5	0.004 1	1 721.9	38.7	1 737.1	19.4	1 738.0	20.4
SL-LT-Zr3-7	132	299	16	0.44	0.051 4	0.001 9	0.311 2	0.012 0	0.044 0	0.000 8	261.2	87.0	275.1	9.3	277.6	4.7
SL-LT-Zr3-8	104	242	13	0.43	0.053 1	0.002 3	0.322 2	0.013 6	0.044 1	0.000 5	331.5	96.3	283.6	10.5	278.4	3.2
SL-LT-Zr3-9	264	572	30	0.46	0.054 1	0.001 9	0.327 2	0.013 0	0.043 9	0.000 8	372.3	75.0	287.4	9.9	277.1	4.8
SL-LT-Zr3-10^*	204	508	28	0.40	0.057 1	0.002 3	0.346 3	0.013 5	0.044 2	0.000 6	494.5	91.7	301.9	10.2	278.7	3.9
SL-LT-Zr3-11	487	966	54	0.50	0.051 3	0.001 5	0.308 9	0.009 3	0.043 8	0.000 4	257.5	68.5	273.4	7.2	276.0	2.8
SL-LT-Zr3-12	486	953	53	0.51	0.054 5	0.001 9	0.320 6	0.011 6	0.042 8	0.000 5	394.5	77.8	282.4	8.9	269.9	3.3

Table 1 LA-ICP-MS zircon U-Pb data of basalts and gabbros in the Solonker ophiolite

点号	含量/10^-6			Th/U	同位素比值						年龄/Ma
点号	Th	U	Pb	Th/U	²⁰⁷Pb/ ²⁰⁶Pb	1σ	²⁰⁷Pb/ ²³⁵U	1σ	²⁰⁶Pb/ ²³⁸U	1σ	²⁰⁷Pb/ ²⁰⁶Pb	1σ	²⁰⁷Pb/ ²³⁵U	1σ	²⁰⁶Pb/ ²³⁸U	1σ
SL-PM2-Zr2-1	58	77	24	0.75	0.088 4	0.002 6	2.891 9	0.085 3	0.236 9	0.003 2	1 390.7	27.8	1 379.8	22.3	1 370.6	16.8
SL-PM2-Zr2-2	195	378	34	0.51	0.053 4	0.002 0	0.527 5	0.017 9	0.071 8	0.000 8	346.4	87.0	430.1	11.9	447.0	5.1
SL-PM2-Zr2-3	115	219	20	0.52	0.055 3	0.002 1	0.556 9	0.022 0	0.072 9	0.001 0	433.4	82.4	449.5	14.3	453.3	6.3
SL-PM2-Zr2-4	136	230	149	0.59	0.159 9	0.003 0	10.442 2	0.228 6	0.470 0	0.005 2	2 454.0	32.9	2 474.8	20.4	2 483.6	22.6
SL-PM2-Zr2-5	145	251	14	0.58	0.053 9	0.002 4	0.323 0	0.015 0	0.043 3	0.000 6	368.6	100.0	284.2	11.5	273.1	3.6
SL-PM2-Zr2-6	74	130	12	0.56	0.056 7	0.002 4	0.568 7	0.023 2	0.073 0	0.001 1	479.7	94.4	457.1	15.0	454.0	6.5
SL-PM2-Zr2-7	32	75	4	0.42	0.057 9	0.003 9	0.342 2	0.021 6	0.043 0	0.000 9	524.1	147.0	298.8	16.3	271.4	5.6
SL-PM2-Zr2-8	121	282	14	0.43	0.054 3	0.00 3 0	0.293 7	0.016 2	0.039 0	0.000 5	388.9	125.9	261.5	12.7	246.7	3.3
SL-PM2-Zr2-9	108	126	8	0.86	0.053 2	0.003 6	0.318 7	0.020 4	0.044 3	0.000 9	338.9	153.7	280.9	15.7	279.5	5.5
SL-PM2-Zr2-10	120	208	12	0.58	0.054 0	0.002 5	0.337 0	0.015 8	0.045 0	0.000 6	368.6	108.3	294.9	12.0	283.9	3.8
SL-PM2-Zr2-11	83	128	7	0.65	0.051 0	0.003 8	0.304 2	0.021 3	0.043 5	0.000 8	242.7	202.8	269.7	16.6	274.7	5.1
SL-PM2-Zr2-12	109	224	20	0.48	0.056 5	0.002 4	0.566 4	0.023 4	0.072 4	0.000 9	472.3	92.6	455.7	15.2	450.4	5.3
SL-PM2-Zr2-13	124	281	25	0.44	0.056 2	0.002 1	0.565 8	0.021 8	0.072 4	0.001 1	461.2	81.5	455.3	14.1	450.9	6.4
SL-PM2-Zr2-14	91	172	16	0.53	0.055 6	0.002 5	0.544 4	0.023 1	0.071 2	0.000 9	438.9	134.2	441.3	15.2	443.3	5.6
SL-PM2-Zr2-15	83	138	13	0.60	0.056 5	0.003 0	0.563 0	0.029 3	0.072 4	0.001 5	472.3	116.7	453.5	19.0	450.8	9.2
SL-PM2-Zr2-16	42	101	9	0.42	0.055 0	0.003 5	0.542 5	0.032 4	0.072 0	0.001 3	413.0	108.3	440.1	21.3	448.5	8.0
SL-PM2-Zr2-17	116	223	14	0.52	0.052 4	0.001 9	0.361 3	0.012 9	0.050 2	0.000 7	305.6	81.5	313.2	9.6	315.8	4.5
SL-PM2-Zr2-18	168	219	13	0.77	0.053 6	0.002 2	0.323 6	0.014 2	0.043 9	0.000 8	353.8	92.6	284.7	10.9	276.7	4.9
SL-PM2-Zr2-19	90	146	14	0.62	0.056 1	0.002 8	0.546 6	0.027 3	0.071 4	0.001 2	453.8	109.2	442.8	17.9	444.6	7.2
SL-PM2-Zr2-20	120	207	12	0.58	0.050 4	0.002 4	0.305 7	0.014 8	0.044 0	0.000 7	213.0	111.1	270.8	11.5	277.5	4.4
SL-PM2-Zr2-21	34	76	7	0.45	0.055 5	0.004 2	0.540 9	0.036 9	0.071 1	0.001 4	435.2	168.5	439.0	24.3	443.0	8.4
SL-PM2-Zr2-22	124	240	21	0.52	0.055 1	0.002 0	0.553 1	0.023 0	0.072 0	0.001 2	416.7	83.3	447.0	15.0	448.2	7.2
SL-PM2-Zr2-23	93	176	16	0.53	0.055 1	0.002 1	0.549 8	0.021 2	0.072 1	0.001 1	413.0	83.3	444.9	13.9	448.7	6.4
SL-PM2-Zr2-24	135	235	21	0.58	0.054 8	0.001 9	0.546 5	0.019 7	0.071 7	0.001 1	405.6	75.9	442.7	12.9	446.2	6.6
SL-PM2-Zr2-25	82	190	17	0.43	0.055 3	0.001 9	0.549 4	0.018 9	0.071 9	0.000 9	433.4	77.8	444.6	12.4	447.6	5.5
SL-PM2-Zr2-26	180	266	25	0.68	0.056 5	0.002 2	0.558 6	0.018 7	0.072 0	0.001 2	472.3	89.8	450.6	12.2	448.5	7.5
SL-PM2-Zr2-27	122	241	22	0.51	0.056 6	0.002 8	0.555 3	0.026 0	0.071 3	0.001 0	476.0	112.0	448.5	17.0	443.7	6.0
SL-PM2-Zr2-28	84	153	8	0.55	0.051 5	0.003 3	0.299 3	0.017 7	0.043 4	0.000 8	261.2	150.0	265.9	13.8	274.2	4.9
SL-PM2-Zr2-29	129	212	12	0.61	0.050 4	0.002 3	0.304 8	0.014 2	0.043 9	0.000 7	213.0	107.4	270.1	11.0	276.7	4.2
SL-PM2-Zr2-30	77	128	7	0.60	0.053 3	0.003 9	0.325 1	0.024 1	0.044 3	0.001 0	342.7	164.8	285.8	18.4	279.6	5.9
SL-PM2-Zr2-31	144	212	12	0.68	0.052 4	0.002 7	0.316 2	0.016 8	0.043 4	0.000 8	301.9	116.7	279.0	13.0	273.7	4.9
SL-LT-Zr3-1	159	407	22	0.39	0.051 5	0.001 9	0.308 8	0.010 8	0.043 7	0.000 7	261.2	83.3	273.2	8.4	275.6	4.4
SL-LT-Zr3-2	109	355	19	0.31	0.055 5	0.002 1	0.334 8	0.013 3	0.043 8	0.001 0	431.5	88.0	293.2	10.1	276.2	6.2
SL-LT-Zr3-3	536	1 070	58	0.50	0.054 6	0.001 8	0.320 1	0.010 0	0.042 5	0.000 5	398.2	76.8	282.0	7.7	268.0	2.8
SL-LT-Zr3-4	219	542	30	0.40	0.055 2	0.002 0	0.332 9	0.012 8	0.043 8	0.000 8	420.4	79.6	291.7	9.8	276.1	5.2
SL-LT-Zr3-5	55	123	37	0.44	0.087 7	0.002 2	2.906 4	0.074 5	0.239 1	0.003 1	1 376.9	52.8	1 383.6	19.4	1 381.8	16.1
SL-LT-Zr3-6	224	369	152	0.61	0.105 4	0.002 2	4.533 0	0.105 6	0.309 5	0.004 1	1 721.9	38.7	1 737.1	19.4	1 738.0	20.4
SL-LT-Zr3-7	132	299	16	0.44	0.051 4	0.001 9	0.311 2	0.012 0	0.044 0	0.000 8	261.2	87.0	275.1	9.3	277.6	4.7
SL-LT-Zr3-8	104	242	13	0.43	0.053 1	0.002 3	0.322 2	0.013 6	0.044 1	0.000 5	331.5	96.3	283.6	10.5	278.4	3.2
SL-LT-Zr3-9	264	572	30	0.46	0.054 1	0.001 9	0.327 2	0.013 0	0.043 9	0.000 8	372.3	75.0	287.4	9.9	277.1	4.8
SL-LT-Zr3-10^*	204	508	28	0.40	0.057 1	0.002 3	0.346 3	0.013 5	0.044 2	0.000 6	494.5	91.7	301.9	10.2	278.7	3.9
SL-LT-Zr3-11	487	966	54	0.50	0.051 3	0.001 5	0.308 9	0.009 3	0.043 8	0.000 4	257.5	68.5	273.4	7.2	276.0	2.8
SL-LT-Zr3-12	486	953	53	0.51	0.054 5	0.001 9	0.320 6	0.011 6	0.042 8	0.000 5	394.5	77.8	282.4	8.9	269.9	3.3

Fig.5 Representative CL images of zircons from the basalts ((a), sample SL-PM2-Zr2) and gabbros ((b), sample SL-LT-Zr3) in the Solonker ophiolite(age unit:Ma)

Fig.6 Chondrite-normalized REE patterns (a) and concordia U-Pb diagrams ((b), (c) and (d)) of zircons from the basalts(sample SL-PM2-Zr2) in the Solonker ophiolite

Fig.7 Chondrite-normalized REE patterns (a) and concordia U-Pb diagram (b) of zircons from gabbros (sample SL-LT-Zr3) in the Solonker ophiolite

Table 2 Major(%), rare earth(10-6)and trace element(10-6)contents of basalts and gabbros in the Solonker ophiolite

样品编号		岩性		SiO₂				TiO₂				Al₂O₃		Fe₂ $O 3 T$			MnO			MgO		CaO			Na₂O			K₂O			P₂O₅			烧矢量			总量			Mg^#			FeO^T
SL-LT22-1		辉长岩		44.22				0.51				17.77		9.37			0.15			9.38		15.03			0.53			0.31			0.02			2.13			99.40			63			8.43
SL-LT22-2		辉长岩		44.35				0.63				17.19		11.06			0.16			10.36		12.74			0.69			0.31			0.03			2.73			100.27			62			9.95
SL-LT22-3		辉长岩		46.41				0.43				16.29		9.58			0.16			10.23		14.28			0.41			0.67			0.03			2.19			100.68			65			8.62
SL-LT22-4		辉长岩		45.43				0.46				18.25		8.60			0.14			8.84		13.29			0.55			1.24			0.08			2.18			99.05			64			7.74
SL-LT22-21		辉长岩		47.26				0.49				13.97		8.50			0.13			8.46		18.47			0.17			0.05			0.05			1.82			99.36			63			7.65
SL-LT22-22		辉长岩		46.30				0.44				15.98		8.55			0.14			9.31		17.20			0.11			0.05			0.05			1.99			100.12			65			7.69
SL-LT22-23		辉长岩		46.15				0.50				15.03		8.67			0.13			9.29		17.14			0.12			0.04			0.05			2.34			99.46			65			7.80
SL-PM2-13		玄武岩		50.79				1.19				15.14		11.03			0.16			6.45		10.76			2.76			0.23			0.07			1.66			100.26			50			9.92
SL-PM2-15		玄武岩		51.17				1.39				13.45		11.56			0.16			6.30		10.58			3.37			0.10			0.10			1.65			99.83			48			10.40
SL-PM2-17		玄武岩		51.94				1.32				13.85		11.53			0.16			5.98		9.81			3.53			0.11			0.10			1.47			99.80			47			10.38
SL-PM2-26		玄武岩		47.75				1.03				19.83		10.31			0.14			3.64		9.94			3.45			0.89			0.44			2.10			99.51			38			9.27
SL-PM2-28		玄武岩		47.86				0.97				18.84		9.90			0.24			3.53		11.33			2.96			0.97			0.14			2.82			99.54			38			8.91
SL-PM2-29		玄武岩		50.57				1.11				17.02		9.70			0.16			4.58		10.37			3.96			0.30			0.19			1.64			99.60			45			8.73
SL-PM3-1		玄武岩		50.21				1.18				14.63		11.39			0.18			5.51		11.23			3.26			0.52			0.09			1.40			99.59			45			10.25
SL-PM3-4		玄武岩		48.81				1.20				15.44		11.95			0.20			5.25		11.42			3.14			0.51			0.13			1.92			99.96			43			10.75
SL-PM3-8		玄武岩		48.81				1.10				14.83		11.52			0.18			6.06		12.13			2.43			0.86			0.08			1.78			99.78			48			10.37
SL-PM3-16		玄武岩		48.33				1.12				15.19		11.11			0.17			4.56		12.46			2.85			0.39			0.11			3.24			99.54			41			10.00
样品编号		岩性		Cr				V				Rb		Ba			Th			U		Ta			Nb			Sr			Hf			Zr			Y			La			Ce
SL-LT22-1		辉长岩		396		326			6.69				1 306.00				0.06			0.13		0.06			0.61			450.00			0.70			20.10			14.30			1.25			4.16
SL-LT22-2		辉长岩		382		444			8.49				175.00				0.08			0.16		0.05			0.60			140.00			0.74			21.20			13.70			1.30			4.19
SL-LT22-3		辉长岩		455		319			21.40				554.00				0.04			0.07		0.06			0.56			122.00			0.67			19.40			12.00			1.34			4.14
SL-LT22-4		辉长岩		270		291			35.20				1 764.00				0.04			0.08		0.06			0.50			276.00			0.62			17.40			12.60			1.27			4.04
SL-LT22-21		辉长岩		447		276			0.61				28.80				0.26			0.14		0.12			0.66			88.60			0.80			26.40			14.20			1.69			4.23
SL-LT22-22		辉长岩		519		255			0.58				37.00				0.41			0.28		0.12			0.74			99.60			0.91			36.00			14.20			1.91			4.60
SL-LT22-23		辉长岩		535		265			0.70				21.50				0.40			0.24		0.11			0.76			78.60			0.91			29.70			16.60			2.00			4.93
SL-PM2-13		玄武岩		375		299			5.89				54.70				0.06			0.21		0.13			0.99			260.00			1.93			64.20			37.90			2.00			7.28
SL-PM2-15		玄武岩		186		342			2.05				26.80				0.09			0.29		0.16			1.57			109.00			1.99			55.80			44.70			2.50			8.92
SL-PM2-17		玄武岩		184		316			2.07				20.90				0.08			0.16		0.15			1.55			108.00			1.92			47.90			43.60			2.46			8.45
SL-PM2-26		玄武岩		262		348			23.60				97.00				0.07			0.54		0.10			0.96			175.00			1.63			48.70			73.90			3.28			6.92
SL-PM2-28		玄武岩		315		361			23.60				71.20				0.07			0.18		0.10			0.92			165.00			1.60			44.30			62.20			3.06			6.49
SL-PM2-29		玄武岩		270		317			7.14				37.30				0.06			0.16		0.14			0.91			133.00			1.61			46.70			57.10			2.41			6.73
SL-PM3-1		玄武岩		229		411			12.20				33.10				0.10			0.27		0.20			1.54			198.00			2.44			120.00			44.90			2.36			7.94
SL-PM3-4		玄武岩		202		391			16.40				33.70				0.10			0.57		0.18			1.57			188.00			2.49			122.00			47.50			2.57			8.05
SL-PM3-8		玄武岩		353		387			26.80				47.50				0.11			0.22		0.15			1.48			226.00			2.60			131.00			45.50			2.46			8.15
SL-PM3-16		玄武岩		323		327			9.28				30.70				0.10			0.36		0.17			1.48			85.20			2.51			123.00			43.40			2.50			8.11
样品编号		岩性		Pr			Nd				Sm		Eu			Gd			Tb		Dy		Ho			Er			Tm			Yb			Lu			ΣREE				(La/Yb)_N
SL-LT22-1		辉长岩		0.72			4.14				1.34		0.65			1.68			0.29		1.89		0.39			1.20			0.16			1.13			0.17			19.17				0.79
SL-LT22-2		辉长岩		0.69			3.95				1.26		0.44			1.62			0.28		1.81		0.39			1.15			0.16			1.06			0.16			18.47				0.88
SL-LT22-3		辉长岩		0.68			3.80				1.15		0.51			1.37			0.23		1.52		0.32			0.98			0.14			0.95			0.15			17.27				1.01
SL-LT22-4		辉长岩		0.67			3.88				1.22		0.60			1.52			0.26		1.66		0.35			1.04			0.15			0.96			0.15			17.76				0.95
SL-LT22-21		辉长岩		0.61			3.38				1.13		0.43			1.49			0.27		1.77		0.39			1.17			0.17			1.13			0.17			18.03				1.07
SL-LT22-22		辉长岩		0.64			3.42				1.10		0.43			1.49			0.26		1.78		0.39			1.20			0.17			1.18			0.18			18.75				1.16
SL-LT22-23		辉长岩		0.72			3.95				1.28		0.47			1.72			0.31		2.02		0.44			1.33			0.19			1.27			0.20			20.83				1.13
SL-PM2-13		玄武岩		1.32			8.11				2.85		1.07			3.85			0.69		4.48		0.95			2.77			0.37			2.46			0.35			38.55				0.58
SL-PM2-15		玄武岩		1.59			9.75				3.41		1.27			4.45			0.79		5.09		1.05			3.00			0.40			2.52			0.35			45.10				0.71
样品编号	岩性		Pr		Nd					Sm			Eu		Gd			Tb			Dy			Ho			Er			Tm			Yb			Lu			ΣREE		(La/Yb)_N
SL-PM2-17	玄武岩		1.55		9.54					3.39			1.22		4.43			0.80			5.09			1.05			2.96			0.40			2.39			0.31			44.03		0.74
SL-PM2-26	玄武岩		1.54		9.56					3.38			1.20		4.88			0.87			6.04			1.36			4.19			0.59			3.85			0.59			48.25		0.61
SL-PM2-28	玄武岩		1.52		9.42					3.30			1.26		4.66			0.83			5.58			1.24			3.64			0.49			3.12			0.46			45.07		0.70
SL-PM2-29	玄武岩		1.33		8.42					3.04			1.13		4.24			0.77			5.19			1.16			3.50			0.48			3.11			0.45			41.96		0.56
SL-PM3-1	玄武岩		1.37		8.38					3.02			1.10		4.13			0.75			4.94			1.04			3.15			0.44			2.91			0.44			41.97		0.58
SL-PM3-4	玄武岩		1.41		8.61					3.04			1.10		4.14			0.75			5.01			1.08			3.28			0.46			3.02			0.45			42.98		0.61
SL-PM3-8	玄武岩		1.41		8.67					3.06			1.11		4.12			0.74			4.96			1.07			3.17			0.45			2.91			0.45			42.73		0.61
SL-PM3-16	玄武岩		1.39		8.39					2.97			1.08		3.99			0.72			4.68			1.02			3.06			0.43			2.84			0.43			41.61		0.63

Table 2 Major(%), rare earth(10-6)and trace element(10-6)contents of basalts and gabbros in the Solonker ophiolite

样品编号		岩性		SiO₂				TiO₂				Al₂O₃		Fe₂ $O 3 T$			MnO			MgO		CaO			Na₂O			K₂O			P₂O₅			烧矢量			总量			Mg^#			FeO^T
SL-LT22-1		辉长岩		44.22				0.51				17.77		9.37			0.15			9.38		15.03			0.53			0.31			0.02			2.13			99.40			63			8.43
SL-LT22-2		辉长岩		44.35				0.63				17.19		11.06			0.16			10.36		12.74			0.69			0.31			0.03			2.73			100.27			62			9.95
SL-LT22-3		辉长岩		46.41				0.43				16.29		9.58			0.16			10.23		14.28			0.41			0.67			0.03			2.19			100.68			65			8.62
SL-LT22-4		辉长岩		45.43				0.46				18.25		8.60			0.14			8.84		13.29			0.55			1.24			0.08			2.18			99.05			64			7.74
SL-LT22-21		辉长岩		47.26				0.49				13.97		8.50			0.13			8.46		18.47			0.17			0.05			0.05			1.82			99.36			63			7.65
SL-LT22-22		辉长岩		46.30				0.44				15.98		8.55			0.14			9.31		17.20			0.11			0.05			0.05			1.99			100.12			65			7.69
SL-LT22-23		辉长岩		46.15				0.50				15.03		8.67			0.13			9.29		17.14			0.12			0.04			0.05			2.34			99.46			65			7.80
SL-PM2-13		玄武岩		50.79				1.19				15.14		11.03			0.16			6.45		10.76			2.76			0.23			0.07			1.66			100.26			50			9.92
SL-PM2-15		玄武岩		51.17				1.39				13.45		11.56			0.16			6.30		10.58			3.37			0.10			0.10			1.65			99.83			48			10.40
SL-PM2-17		玄武岩		51.94				1.32				13.85		11.53			0.16			5.98		9.81			3.53			0.11			0.10			1.47			99.80			47			10.38
SL-PM2-26		玄武岩		47.75				1.03				19.83		10.31			0.14			3.64		9.94			3.45			0.89			0.44			2.10			99.51			38			9.27
SL-PM2-28		玄武岩		47.86				0.97				18.84		9.90			0.24			3.53		11.33			2.96			0.97			0.14			2.82			99.54			38			8.91
SL-PM2-29		玄武岩		50.57				1.11				17.02		9.70			0.16			4.58		10.37			3.96			0.30			0.19			1.64			99.60			45			8.73
SL-PM3-1		玄武岩		50.21				1.18				14.63		11.39			0.18			5.51		11.23			3.26			0.52			0.09			1.40			99.59			45			10.25
SL-PM3-4		玄武岩		48.81				1.20				15.44		11.95			0.20			5.25		11.42			3.14			0.51			0.13			1.92			99.96			43			10.75
SL-PM3-8		玄武岩		48.81				1.10				14.83		11.52			0.18			6.06		12.13			2.43			0.86			0.08			1.78			99.78			48			10.37
SL-PM3-16		玄武岩		48.33				1.12				15.19		11.11			0.17			4.56		12.46			2.85			0.39			0.11			3.24			99.54			41			10.00
样品编号		岩性		Cr				V				Rb		Ba			Th			U		Ta			Nb			Sr			Hf			Zr			Y			La			Ce
SL-LT22-1		辉长岩		396		326			6.69				1 306.00				0.06			0.13		0.06			0.61			450.00			0.70			20.10			14.30			1.25			4.16
SL-LT22-2		辉长岩		382		444			8.49				175.00				0.08			0.16		0.05			0.60			140.00			0.74			21.20			13.70			1.30			4.19
SL-LT22-3		辉长岩		455		319			21.40				554.00				0.04			0.07		0.06			0.56			122.00			0.67			19.40			12.00			1.34			4.14
SL-LT22-4		辉长岩		270		291			35.20				1 764.00				0.04			0.08		0.06			0.50			276.00			0.62			17.40			12.60			1.27			4.04
SL-LT22-21		辉长岩		447		276			0.61				28.80				0.26			0.14		0.12			0.66			88.60			0.80			26.40			14.20			1.69			4.23
SL-LT22-22		辉长岩		519		255			0.58				37.00				0.41			0.28		0.12			0.74			99.60			0.91			36.00			14.20			1.91			4.60
SL-LT22-23		辉长岩		535		265			0.70				21.50				0.40			0.24		0.11			0.76			78.60			0.91			29.70			16.60			2.00			4.93
SL-PM2-13		玄武岩		375		299			5.89				54.70				0.06			0.21		0.13			0.99			260.00			1.93			64.20			37.90			2.00			7.28
SL-PM2-15		玄武岩		186		342			2.05				26.80				0.09			0.29		0.16			1.57			109.00			1.99			55.80			44.70			2.50			8.92
SL-PM2-17		玄武岩		184		316			2.07				20.90				0.08			0.16		0.15			1.55			108.00			1.92			47.90			43.60			2.46			8.45
SL-PM2-26		玄武岩		262		348			23.60				97.00				0.07			0.54		0.10			0.96			175.00			1.63			48.70			73.90			3.28			6.92
SL-PM2-28		玄武岩		315		361			23.60				71.20				0.07			0.18		0.10			0.92			165.00			1.60			44.30			62.20			3.06			6.49
SL-PM2-29		玄武岩		270		317			7.14				37.30				0.06			0.16		0.14			0.91			133.00			1.61			46.70			57.10			2.41			6.73
SL-PM3-1		玄武岩		229		411			12.20				33.10				0.10			0.27		0.20			1.54			198.00			2.44			120.00			44.90			2.36			7.94
SL-PM3-4		玄武岩		202		391			16.40				33.70				0.10			0.57		0.18			1.57			188.00			2.49			122.00			47.50			2.57			8.05
SL-PM3-8		玄武岩		353		387			26.80				47.50				0.11			0.22		0.15			1.48			226.00			2.60			131.00			45.50			2.46			8.15
SL-PM3-16		玄武岩		323		327			9.28				30.70				0.10			0.36		0.17			1.48			85.20			2.51			123.00			43.40			2.50			8.11
样品编号		岩性		Pr			Nd				Sm		Eu			Gd			Tb		Dy		Ho			Er			Tm			Yb			Lu			ΣREE				(La/Yb)_N
SL-LT22-1		辉长岩		0.72			4.14				1.34		0.65			1.68			0.29		1.89		0.39			1.20			0.16			1.13			0.17			19.17				0.79
SL-LT22-2		辉长岩		0.69			3.95				1.26		0.44			1.62			0.28		1.81		0.39			1.15			0.16			1.06			0.16			18.47				0.88
SL-LT22-3		辉长岩		0.68			3.80				1.15		0.51			1.37			0.23		1.52		0.32			0.98			0.14			0.95			0.15			17.27				1.01
SL-LT22-4		辉长岩		0.67			3.88				1.22		0.60			1.52			0.26		1.66		0.35			1.04			0.15			0.96			0.15			17.76				0.95
SL-LT22-21		辉长岩		0.61			3.38				1.13		0.43			1.49			0.27		1.77		0.39			1.17			0.17			1.13			0.17			18.03				1.07
SL-LT22-22		辉长岩		0.64			3.42				1.10		0.43			1.49			0.26		1.78		0.39			1.20			0.17			1.18			0.18			18.75				1.16
SL-LT22-23		辉长岩		0.72			3.95				1.28		0.47			1.72			0.31		2.02		0.44			1.33			0.19			1.27			0.20			20.83				1.13
SL-PM2-13		玄武岩		1.32			8.11				2.85		1.07			3.85			0.69		4.48		0.95			2.77			0.37			2.46			0.35			38.55				0.58
SL-PM2-15		玄武岩		1.59			9.75				3.41		1.27			4.45			0.79		5.09		1.05			3.00			0.40			2.52			0.35			45.10				0.71
样品编号	岩性		Pr		Nd					Sm			Eu		Gd			Tb			Dy			Ho			Er			Tm			Yb			Lu			ΣREE		(La/Yb)_N
SL-PM2-17	玄武岩		1.55		9.54					3.39			1.22		4.43			0.80			5.09			1.05			2.96			0.40			2.39			0.31			44.03		0.74
SL-PM2-26	玄武岩		1.54		9.56					3.38			1.20		4.88			0.87			6.04			1.36			4.19			0.59			3.85			0.59			48.25		0.61
SL-PM2-28	玄武岩		1.52		9.42					3.30			1.26		4.66			0.83			5.58			1.24			3.64			0.49			3.12			0.46			45.07		0.70
SL-PM2-29	玄武岩		1.33		8.42					3.04			1.13		4.24			0.77			5.19			1.16			3.50			0.48			3.11			0.45			41.96		0.56
SL-PM3-1	玄武岩		1.37		8.38					3.02			1.10		4.13			0.75			4.94			1.04			3.15			0.44			2.91			0.44			41.97		0.58
SL-PM3-4	玄武岩		1.41		8.61					3.04			1.10		4.14			0.75			5.01			1.08			3.28			0.46			3.02			0.45			42.98		0.61
SL-PM3-8	玄武岩		1.41		8.67					3.06			1.11		4.12			0.74			4.96			1.07			3.17			0.45			2.91			0.45			42.73		0.61
SL-PM3-16	玄武岩		1.39		8.39					2.97			1.08		3.99			0.72			4.68			1.02			3.06			0.43			2.84			0.43			41.61		0.63

Fig.8 TAS classification diagram (a) and SiO2-FeOT/MgO discrimination diagram (b) for basalts and gabbros in the Solonker ophiolite (base map after ref.[31] and [32], respectively)

Fig.9 Chondrite-normalized REE patterns ((a) and (c)) and N-MORB-normalized trace element spidergrams ((b) and (d)) of basalts and gabbros in the Solonker ophiolite

Fig.10 Harker diagrams for basalts and gabbros in the Solonker ophiolite

Fig.11 Sm-Sm/Yb diagram (a) and Th/Nb-U/Th diagram (b) of the basalts and gabbros in the Solonker ophiolite

Fig.12 Tectonic discrimination diagrams of 2Nb-Zr/4-Y (a), Zr-Zr/Y(b), Ta/Yb-Th/Yb(c), and Ti/1000-V (d) of basalts in the Solonker ophiolite

References 65

[1]	DILEK Y, FURNE H. Ophiolites and their origins[J]. Elements, 2014,10(2):93-100.
[2]	XIAO W J, WINDLEY B F, HAO J, et al. Accretion leading to collision and the Permian Solonker suture, Inner Mongolia, China: Termination of the central Asian orogenic belt[J]. Tectonics, 2003,22(6):1-8.
[3]	XIAO W J, WINDLEY B F, HUANG B C, et al. End-Permian to mid-Triassic termination of the accretionary processes of the southern Altaids: implications for the geodynamic evolution, Phanerozoic continental growth, and metallogeny of Central Asia[J]. International Journal of Earth Sciences, 2009,98(6):1189-1217.
[4]	JIAN P, LIU D Y, KRÖNER A, et al. Time scale of an early to mid-Paleozoic orogenic cycle of the long-lived Central Asian Orogenic Belt, Inner Mongolia of China: Implications for continental growth[J]. Lithos, 2008,101(3/4):233-259.
[5]	JIAN P, LIU D Y, KRÖNER A, et al. Evolution of a Permian intraoceanic arc-trench system in the Solonker suture zone, Central Asian Orogenic Belt, China and Mongolia[J]. Lithos, 2010,118(1/2):169-190.
[6]	梁日暄. 内蒙古中段蛇绿岩特征及地质意义[J]. 中国区域地质, 1994(1):37-45.
[7]	黄金香, 赵志丹, 张宏飞, 等. 内蒙古温都尔庙和巴彦敖包—交其尔蛇绿岩的元素与同位素地球化学: 对古亚洲洋东部地幔域特征的限制[J]. 岩石学报, 2006,22(12):2889-2900.
[8]	张晓飞, 周毅, 刘俊来, 等. 内蒙古西乌旗大石寨组火山岩年代学和地球化学特征及地质意义[J]. 岩石学报, 2018,34(6):1775-1791.
[9]	李锦轶, 高立明, 孙桂华, 等. 内蒙古东部双井子中三叠世同碰撞壳源花岗岩的确定及其对西伯利亚与中朝古板块碰撞时限的约束[J]. 岩石学报, 2007,23(3):565-582.
[10]	WU F Y, ZHAO G C, SUN D Y, et al. The Hulan Group: Its role in the evolution of the Central Asian Orogenic Belt of NE China[J]. Journal of Asian Earth Sciences, 2007,30(3):542-556.
[11]	SONG S G, WANG M M, XU X, et al. Ophiolites in the Xing’an-Inner Mongolia accretionary belt of the CAOB: Implications for two cycles of seafloor spreading and accretionary orogenic events[J]. Tectonics, 2015,34(10):2221-2248.
[12]	WANG Y, ZHOU L Y, ZHAO L J. Cratonic reactivation and orogeny: An example from the northern margin of the North China Craton[J]. Gondwana Research, 2013,24(3/4):1203-1222.
[13]	XU B, CHARVET J, CHEN Y, et al. Middle Paleozoic convergent orogenic belts in western Inner Mongolia (China): framework, kinematics, geochronology and implications for tectonic evolution of the Central Asian Orogenic Belt[J]. Gondwana Research, 2013,23(4):1342-1364.
[14]	邵济安, 唐克东, 何国琦. 内蒙古早二叠世构造古地理的再造[J]. 岩石学报, 2014,30(7):1858-1866.
[15]	张晋瑞, 魏春景, 初航. 兴蒙造山带构造演化的新模式: 来自内蒙古中部四期不同类型变质作用的证据[J]. 岩石学报, 2018,34(10):2857-2872.
[16]	MIAO L C, ZHANG F, FAN W M, et al. Phanerozoic evolution of the Inner Mongolia-Daxinganling orogenic belt in North China: Constraints from geochronology of ophiolites and associated formations[J]. Geological Society, London, Special Publications, 2007,280(1):223-237.
[17]	CHEN B, JAHN B M, TIAN W. Evolution of the Solonker suture zone: Constraints from zircon U-Pb ages, Hf isotopic ratios and whole-rock Nd-Sr isotope compositions of subduction-and collision-related magmas and forearc sediments[J] Journal of Asian Earth Sciences, 2009,34(3):245-257.
[18]	LI Y L, BROUWER F M, XIAO W J, et al. A Paleozoic fore-arc complex in the eastern Central Asian Orogenic Belt: Petrology, geochemistry and zircon U-Pb-Hf isotopic composition of paragneisses from the Xilingol Complex in Inner Mongolia, China[J]. Gondwana Research, 2017,47:323-341.
[19]	邵济安. 中朝板块北缘中段地壳演化 [M]. 北京: 北京大学出版社, 1991: 1-136.
[20]	张旗, 周国庆, 王焰. 中国蛇绿岩的分布、时代及其形成环境[J]. 岩石学报, 2003,19(1):1-8.
[21]	付冬. 内蒙古索伦山混杂岩带的厘定 [D]. 武汉: 中国地质大学(武汉), 2016: 1-89.
[22]	薛建平, 苏尚国, 李成元, 等. 内蒙古索伦山地区蛇绿岩岩石单元地质特征、就位机制及时限[J]. 现代地质, 2017,31(3):498-507.
[23]	LUO Z W, XU B, SHI G Z, et al. Solonker ophiolite in Inner Mongolia, China: A late Permian continental margin-type ophiolite[J]. Lithos, 2016,261:72-91.
[24]	晨辰, 张志诚, 郭召杰, 等. 内蒙古达茂旗满都拉地区早二叠世基性岩的年代学、地球化学及其地质意义[J]. 中国科学(地球科学), 2012,42(3):343-358.
[25]	LIU Y S, HU Z C, GAO S, et al. In situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard[J]. Chemical Geology, 2008,257(1/2):34-43.
[26]	DULSKI P. Interferences of oxide, hydroxide and chloride analyte species in the determination of rare earth elements in geological samples by inductively coupled plasma-mass spectrometry[J]. Fresenius’ Journal of Analytical Chemistry, 1994,350(4/5):194-203.
[27]	吴元保, 郑永飞. 锆石成因矿物学研究及其对U-Pb年龄解释的制约[J]. 科学通报, 2004,49(16):1589-1604.
[28]	SUN S S, MCDONOUGH W F. Chemical and isotopic systematics of oceanic basalts:implications for mantle composition and processes[J]. Geological Society, London, Special Publication, 1989,42:313-345.
[29]	CRAWFORD A J, FALLOON T J, EGGINS S. The origin of island arc high-alumina basalts[J]. Contributions to Mineralogy and Petrology, 1987,97(3):417-430. DOI URL
[30]	FREY F A, GREEN D H, ROY S D. Integrated models of basalt petrogenesis: A study of quartz tholeiites to olivine melilitites from South Eastern Australia utilizing geochemical and experimental petrological data[J]. Journal of Petrology, 1978,19(3):463-513.
[31]	MIDDLEMOST E A K. Naming materials in the magma/igneous rock system[J]. Earth-Science Reviews, 1994,37(3):215-224.
[32]	MIYASHIRO A. Volcanic rock series in island arcs and active continental margins[J]. American Journal of Science, 1974,274(4):321-355.
[33]	NIU Y L, O’HARA M J. OOrigin of ocean island basalts: A new perspective from petrology, geochemistry, and mineral physics considerations[J]. Journal of Geophysical Research(Solid Earth), 2003,108(4):1-19.
[34]	李钢柱, 王玉净, 李成元, 等. 内蒙古索伦山蛇绿岩带早二叠世放射虫动物群的发现及其地质意义[J]. 科学通报, 2017,62(5):400-406.
[35]	CHEN B, JAHN B M, WILDE S, et al. Two contrasting Paleozoic magmatic belts in northern Inner Mongolia, China: petrogenesis and tectonic implications[J]. Tectonophysics, 2000,328(1):157-182.
[36]	陈斌, 赵国春, WILDE S. 内蒙古苏尼特左旗南两类花岗岩同位素年代学及其构造意义[J]. 地质论评, 2001,47(4):361-367.
[37]	张维, 简平. 内蒙古达茂旗北部早古生代花岗岩类SHRIMP U-Pb年代学[J]. 地质学报, 2008,82(6):778-787.
[38]	葛梦春, 周文孝, 于洋, 等. 内蒙古锡林郭勒杂岩解体及表壳岩系年代确定[J]. 地学前缘, 2001,18(5):182-195.
[39]	朱永峰, 孙世华, 毛骞, 等. 内蒙古锡林格勒杂岩的地球化学研究: 从Rodinia聚合到古亚洲洋闭合后碰撞造山的历史记录[J]. 高校地质学报, 2004,10(3):343-355.
[40]	吴福元, 徐义刚, 高山, 等. 华北岩石圈减薄与克拉通破坏研究的主要学术争论[J]. 岩石学报, 2008,24(6):1145-1174.
[41]	XIE W, LUO Z Y, Xu Y G, et al. Petrogenesis and geochemistry of the late Carboniferous rear-arc (or back-arc) pillow basaltic lava in the Bogda Mountains, Chinese North Tianshan[J]. Lithos, 2016,244:30-42.
[42]	RUDNICK R L, GAO S. Composition of the continental crust[M]// RUDNICK R L. Treatise on Geochemistry. Oxford: Elsevier, 2003: 1-64.
[43]	PLANK T. Constraints from thorium/lanthanum on sediment recycling at subduction zones and the evolution of the continents[J]. Journal of Petrology, 2005,46(5):921-944.
[44]	ALDANMAZl E, PEARCE J A, THIRLWALL M F, et al. Petrogenetic evolution of late Cenozoic, post-collision volcanism in western Anatolia, Turkey[J]. Journal of Volcanology and Geothermal Research, 2000,102(1/2):67-95.
[45]	马中平, 夏林圻, 徐学义, 等. 南天山北部巴音布鲁克早古生代火成岩的地球化学特征与岩石成因[J]. 岩石学报, 2008,24(10):2289-2300.
[46]	王树庆, 许继峰, 刘希军, 等. 内蒙古朝克山蛇绿岩地球化学:洋内弧后盆地的产物?[J]. 岩石学报, 2008,24(12):2869-2879.
[47]	MESCHEDE M. A method of discriminating between different types of mid-ocean ridge basalts and continental tholeiites with the Nb-Zr-Y diagram[J]. Chemical Geology, 1986,56(3):207-218.
[48]	PEARCE J, NORRY M. Petrogenetic implications of Ti, Zr, Y, and Nb variations in volcanic rocks[J]. Contributions to Mineralogy & Petrology, 1979,69(1):33-47.
[49]	PEARCE J A. Geochemical fingerprinting of oceanic basalts with applications to ophiolite classification and the search for Archean oceanic crust[J]. Lithos, 2008,100(1/4):14-48.
[50]	SHERVAIS J W. Ti-V plots and the petrogenesis of modern and ophiolitic lavas[J]. Earth and Planetary Science Letters, 1982,59(1):101-118.
[51]	WOODHEAD J, EGGINS S, GAMBLE J. High field strength and transition element systematics in island arc and back-arc basin basalts: Evidence for multi-phase melt extraction and a depleted mantle wedge[J]. Earth and Planetary Science Letters, 1993,114(4):491-504.
[52]	PEARCE J A. Immobile element fingerprinting of ophiolites[J]. Elements, 2014,10(2):101-108.
[53]	MCCULLOCH M T, GAMBLE J A. Geochemical and geodynamic constraints on subduction zone magmatism[J]. Earth and Planetary Science Letters, 1991,102(3/4):358-374.
[54]	SHINJO R, CHUANG S L, KATO Y, et al. Geochemical and Sr-Nd isotopic characteristics of volcanic rocks from the Okinawa Trough and Ryukyu Arc: Implications for the evolution of a young, intracontinental back arc basin[J]. Journal of Geophysical Research(Solid Earth), 1999,104(5):10591-10608.
[55]	XU J F, CASTILLO P R, CHENF R, et al. Geochemistry of late Paleozoic mafic igneous rocks from the Kuerti area, Xinjiang, northwest China: implications for backarc mantle evolution[J]. Chemical Geology, 2003,193(1/2):137-154.
[56]	GRIBBLE R F, STERN R J, BLOOMER S H, et al. MORB mantle and subduction components interact to generate basalts in the southern Mariana Trough back-arc basin[J]. Geochimica et Cosmochimica Acta, 1996,60(12):2153-2166.
[57]	EVANS C A, CASTENEDA G, FRANCO H. Geochemical complexities preserved in the volcanic rocks of the Zambales Ophiolite, Philippines[J]. Journal of Geophysical Research, 1991,96(10):16251-16262.
[58]	TAYLOR R N, NESBITT R W, VIDAL P. Mineralogy, chemistry, and genesis of the boninite series volcanics, Chichijima, Bonin Islands, Japan[J]. Journal of Petrology, 1994,35(3):577-617.
[59]	ENCARNACIÓN J, MUKASA S B, EVANS C A. Subduction components and the generation of arc-like melts in the Zambales ophiolite, Philippines: Pb, Sr and Nd isotopic constraints[J]. Chemical Geology, 1999,156(1):343-357.
[60]	薛建平, 刘美玉, 李钢柱, 等. 内蒙古索伦山地区哈尔博格托尔TTG岩锆石年代学、岩石地球化学及大地构造意义[J]. 地学前缘, 2018,25(3):230-239.
[61]	韩国卿, 刘永江, 温泉波, 等. 西拉木伦河缝合带北侧二叠纪砂岩碎屑锆石LA-ICP-MS U-Pb年代学及其构造意义[J]. 地球科学——中国地质大学学报, 2011,36(4):687-702.
[62]	郑月娟, 张海华, 陈树旺, 等. 内蒙古阿鲁科尔沁旗林西组砂岩LA-ICP-MS锆石U-Pb年龄及意义[J]. 地质通报, 2014,33(9):1293-1307.
[63]	孙德有, 吴福元, 张艳斌, 等. 西拉木伦河―长春―延吉板块缝合带的最后闭合时间——来自吉林大玉山花岗岩体的证据[J]. 吉林大学学报(地球科学版), 2004,34(2):174-181.
[64]	ZHANG S H, ZHAO Y, SONG B, et al. Contrasting Late Carboniferous and late Permian-middle Triassic intrusive suites from the northern margin of the North China craton: Geochronology, petrogenesis, and tectonic implications[J]. GSA Bulletin, 2009,121:181-200.
[65]	章永梅, 张华锋, 刘文灿, 等. 内蒙古中部四子王旗大庙岩体时代及成因[J]. 岩石学报, 2009,25(12):3165-3181.