Age and Geochemistry of the Early Cretaceous Intrusive Rocks in Southern Tahe, Northern Great Xing’an Range

doi:10.19657/j.geoscience.1000-8527.2018.06.10

Abstract

Abstract:

This paper presents zircon U-Pb dating, in-situ zircon Hf isotopic and geochemical data for the intrusive rocks from southern Tahe, northern Great Xing’an Range, to constrain their petrogenesis and tectonic settings. The rocks consist of a continuous mafic to felsic magmatic suite (SiO₂=51.27%-74.90%). Zircon U-Pb dating indicates that the two intrusive rock samples analyzed were emplaced in the Early Cretaceous (126.9±0.8) Ma and (123.4±0.9) Ma). In the Harker diagrams, most of the major elements and trace elements have a good linear evolutionary trend with increasing SiO₂ content (except K₂O and Rb). The rocks are generally enriched in Pb and LILEs (K, Rb, Ba), depleted in HFSEs (Nb, Ta, Ti, P), and have similar Sr and Nb isotope characteristics (⁸⁷Sr/⁸⁶Sr_i=0.705,517-0.706,827, ε_Nd(t)=-6.82-0.79). This indicates that the Early Cretaceous intrusive rocks in southern Tahe derived from a mixed source of garnet lherzolite (predominant) and spinel lherzolite, which were metasomatized by subduction-related fluids or melts. During the rapid magma ascent, the magma has experienced fractionation, eventually forming a broad compositional spectrum of rocks. The paper reviews the distribution of volcanic rocks in northeast China, paleomagnetic data, the timing of the Mongolia-Okhotsk ocean closure and the subduction direction of the Paleo-Pacific Plate. These data imply that the Early Cretaceous intrusive rocks in southern Tahe were likely formed in a post-collisional setting after the closure of the Mongolia-Okhotsk ocean.

Key words: Great Xing’an Range, zircon U-Pb dating, fractional crystallization, Early Cretaceous, Mongolia-Okhotsk ocean

CLC Number:

P588.12

XU Liming, WANG Dake, LIU Yu, ZHENG Jilin, ZHANG Wenqiang, LIANG Zhongkai. Age and Geochemistry of the Early Cretaceous Intrusive Rocks in Southern Tahe, Northern Great Xing’an Range[J]. Geoscience, 2018, 32(06): 1212-1226.

Figures/Tables 13

Fig.1 Maps showing the tectonic subdivision(a), major geographical units(b) of NE China and geology(c) of the study area

Fig.2 Field photos and thin section photomicrographs of the intrusive rocks from the study area

Table 1 LA-ICP-MS U-Pb zircon analytical data of the intrusive rocks from the study area

测点	w_B/10^-6		Th/U	同位素比值							年龄/Ma
测点	Pb	U	Th/U	²⁰⁶Pb/ ²³⁸U	±1σ	²⁰⁷Pb/ ²³⁵U	±1σ	²⁰⁷Pb/ ²⁰⁶Pb	±1σ		²⁰⁶Pb/ ²³⁸U	±1σ	²⁰⁷Pb/ ²³⁵U	±1σ	²⁰⁷Pb/ ²⁰⁶Pb	±1σ
SPM3TC27-1	3	121	1.57	0.020 2	0.000 4	0.135 5	0.033 8	0.048 8	0.012 4	128.6		2.8	129.1	32.2	137.3	595.5
SPM3TC27-2	3	100	1.48	0.020 1	0.000 3	0.134 7	0.015 4	0.048 5	0.021 8	128.5		1.9	128.3	14.7	124.6	105 6.8
SPM3TC27-3	1	47	1.10	0.020 0	0.000 4	0.134 3	0.023 8	0.048 8	0.013 9	127.3		2.8	128.0	22.7	139.7	669.5
SPM3TC27-4	1	42	1.11	0.019 6	0.000 4	0.133 6	0.017 8	0.049 6	0.007 3	124.8		2.3	127.4	16.9	174.7	341.4
SPM3TC27-5	1	41	1.12	0.020 2	0.000 5	0.135 4	0.026 0	0.048 5	0.011 1	129.2		3.2	128.9	24.7	123.9	539.4
SPM3TC27-6	1	49	1.19	0.020 0	0.000 3	0.133 8	0.017 0	0.048 4	0.006 5	128.0		2.2	127.5	16.2	119.6	315.6
SPM3TC27-7	1	37	1.15	0.019 6	0.000 4	0.131 6	0.014 1	0.048 8	0.005 5	124.9		2.6	125.6	13.4	137.7	263.2
SPM3TC27-8	1	43	1.44	0.019 9	0.000 8	0.133 3	0.028 6	0.048 6	0.011 8	126.9		5.0	127.1	27.3	129.9	572.8
SPM3TC27-9	1	40	1.11	0.020 1	0.000 4	0.132 0	0.026 2	0.047 6	0.010 4	128.5		2.7	125.9	25.0	77.5	520.2
SPM3TC27-10	1	53	1.44	0.020 2	0.000 5	0.135 3	0.028 9	0.048 5	0.012 4	129.1		2.9	128.8	27.5	122.7	601.6
SPM3TC27-11	2	56	1.60	0.020 7	0.000 4	0.138 0	0.028 9	0.048 3	0.011 7	132.1		2.4	131.2	27.5	115.3	570.2
SPM3TC27-12	1	42	1.21	0.019 7	0.000 3	0.131 9	0.013 7	0.048 5	0.005 6	125.9		2.1	125.8	13.1	124.3	270.2
SPM3TC27-13	3	113	1.24	0.020 4	0.000 3	0.136 3	0.012 8	0.048 5	0.004 6	130.2		1.8	129.8	12.2	122.2	222.6
SPM3TC27-14	1	52	1.17	0.019 4	0.000 3	0.134 0	0.011 1	0.050 2	0.004 3	123.6		1.9	127.7	10.6	204.1	199.7
SPM3TC27-15	2	89	1.33	0.020 3	0.000 3	0.135 8	0.017 5	0.048 6	0.006 6	129.3		1.7	129.3	16.7	128.3	318.1
SPM3TC27-16	2	62	1.28	0.019 9	0.000 3	0.134 7	0.010 2	0.049 2	0.003 8	126.9		1.9	128.3	9.7	155.9	179.8
SPM3TC27-17	11	333	2.98	0.020 2	0.000 2	0.134 1	0.004 6	0.048 1	0.001 7	129.0		1.4	127.7	4.3	104.9	82.9
SPM3TC27-18	2	59	1.66	0.019 8	0.000 3	0.133 3	0.015 0	0.048 9	0.006 0	126.3		2.1	127.1	14.3	142.1	285.9
SPM3TC27-19	1	47	1.18	0.020 1	0.000 4	0.133 4	0.025 4	0.048 1	0.011 8	128.5		2.4	127.2	24.2	103.4	580.5
SPM3TC27-20	1	52	1.59	0.019 7	0.000 8	0.133 6	0.064 5	0.049 1	0.026 4	126.1		4.9	127.3	61.4	150.5	125 9.4
SPM3TC27-21	1	48	1.22	0.020 1	0.000 3	0.134 6	0.029 1	0.048 6	0.010 3	128.2		2.2	128.2	27.7	129.1	498.6
SPM3TC27-22	2	61	2.89	0.020 1	0.000 3	0.132 8	0.021 3	0.048 0	0.008 2	128.2		1.8	126.6	20.3	97.4	407.0
SPM3TC27-23	1	53	1.23	0.019 5	0.000 4	0.132 4	0.015 0	0.049 3	0.006 4	124.5		2.3	126.3	14.3	160.0	303.5
SPM3TC27-24	2	56	1.34	0.019 4	0.000 3	0.134 0	0.013 6	0.050 2	0.008 3	123.7		2.0	127.7	13.0	203.5	383.4
SPM3TC27-25	1	50	1.33	0.019 4	0.000 5	0.131 4	0.026 1	0.049 1	0.009 9	123.9		3.0	125.4	24.9	153.8	470.8
SPM3TC27-26	2	76	1.19	0.020 2	0.000 5	0.134 4	0.031 9	0.048 2	0.013 3	129.0		3.2	128.1	30.4	110.7	653.3
SPM3TC27-27	2	79	1.65	0.019 6	0.000 3	0.132 3	0.008 9	0.049 1	0.003 2	124.9		1.7	126.2	8.5	150.6	152.1
SPM3TC27-28	21	272	12.24	0.018 7	0.000 4	0.136 5	0.007 6	0.052 8	0.003 0	119.7		2.4	130.0	7.3	322.2	128.0
SPM3TC27-29	8	268	2.99	0.020 0	0.000 3	0.134 8	0.014 8	0.048 8	0.005 2	127.8		1.6	128.4	14.1	138.9	250.5
SPM3TC27-30	1	61	1.38	0.019 8	0.000 3	0.133 9	0.029 6	0.049 0	0.011 6	126.5		2.0	127.6	28.2	146.9	555.0
SPM3TC27-31	1	40	1.13	0.019 2	0.000 4	0.129 4	0.015 4	0.048 8	0.006 0	122.8		2.6	123.6	14.7	139.5	289.0
SPM3TC27-32	1	55	1.16	0.019 6	0.000 4	0.130 9	0.013 7	0.048 4	0.005 3	125.2		2.3	124.9	13.1	120.8	257.8
SPM13TC19-1	4	164	1.05	0.019 4	0.000 2	0.197 6	0.010 8	0.073 8	0.004 0	123.9		1.3	183.1	10.0	1 037.0	108.7
SPM13TC19-2	4	145	0.87	0.019 5	0.000 2	0.168 9	0.011 5	0.062 9	0.004 3	124.4		1.3	158.5	10.8	704.4	146.2
SPM13TC19-3	2	84	0.74	0.019 7	0.000 3	0.210 0	0.020 6	0.077 2	0.007 9	125.9		1.6	193.6	19.0	1 127.2	204.3
SPM13TC19-4	2	85	0.65	0.019 3	0.000 3	0.159 1	0.019 1	0.059 7	0.007 8	123.3		1.6	149.9	18.0	593.7	282.9
SPM13TC19-5	4	175	1.10	0.019 7	0.000 2	0.145 7	0.009 7	0.053 8	0.003 6	125.5		1.3	138.1	9.2	360.6	151.5
SPM13TC19-6	16	605	1.49	0.019 7	0.000 2	0.168 0	0.004 1	0.061 9	0.001 5	125.6		1.2	157.7	3.9	670.7	51.4
SPM13TC19-7	11	393	1.40	0.020 3	0.000 2	0.314 6	0.007 1	0.112 6	0.002 5	129.3		1.3	277.8	6.3	1 842.1	39.4
SPM13TC19-8	3	134	1.13	0.019 5	0.000 2	0.212 5	0.015 9	0.078 9	0.005 9	124.7		1.4	195.7	14.7	1 170.5	148.5
SPM13TC19-9	4	183	0.89	0.019 6	0.000 2	0.218 7	0.009 8	0.080 8	0.003 5	125.4		1.3	200.8	9.0	1 215.7	86.1
SPM13TC19-10	9	334	1.36	0.020 0	0.000 2	0.227 2	0.006 2	0.082 5	0.002 2	127.5		1.2	207.9	5.7	1 257.3	51.8
SPM13TC19-11	5	205	0.79	0.020 6	0.000 2	0.307 5	0.012 2	0.108 5	0.004 1	131.2		1.4	272.2	10.8	1 774.4	68.9
SPM13TC19-12	6	201	1.27	0.020 7	0.000 2	0.317 1	0.010 5	0.111 0	0.003 6	132.2		1.4	279.6	9.3	1 816.3	59.0
SPM13TC19-13	3	105	1.01	0.019 5	0.000 2	0.152 0	0.016 6	0.056 4	0.006 6	124.7		1.5	143.6	15.7	468.4	260.1
SPM13TC19-14	13	478	2.06	0.019 5	0.000 2	0.139 4	0.004 6	0.051 9	0.001 6	124.3		1.2	132.5	4.3	283.1	72.4
SPM13TC19-15	3	129	1.12	0.019 7	0.000 2	0.173 4	0.015 1	0.064 0	0.005 7	125.4		1.4	162.4	14.1	741.7	188.7
SPM13TC19-16	4	161	1.21	0.020 5	0.000 2	0.319 0	0.014 5	0.113 0	0.005 0	130.7		1.4	281.1	12.8	1 848.0	79.6
SPM13TC19-17	4	167	0.87	0.019 6	0.000 2	0.182 2	0.012 2	0.067 4	0.004 5	125.2		1.3	170.0	11.4	849.2	138.3
SPM13TC19-18	9	362	1.39	0.019 4	0.000 2	0.142 0	0.006 1	0.053 0	0.002 3	124.1		1.2	134.8	5.8	327.5	97.0
SPM13TC19-19	3	135	0.95	0.019 7	0.000 2	0.227 5	0.018 0	0.083 7	0.006 5	125.8		1.5	208.2	16.5	1 286.0	151.6
SPM13TC19-20	6	229	1.12	0.019 5	0.000 2	0.146 1	0.008 2	0.054 3	0.003 0	124.6		1.3	138.5	7.8	382.4	125.5
SPM13TC19-21	2	98	0.62	0.020 0	0.000 3	0.233 5	0.024 2	0.084 5	0.008 9	127.9		1.7	213.1	22.1	1 303.8	204.4

Table 1 LA-ICP-MS U-Pb zircon analytical data of the intrusive rocks from the study area

测点	w_B/10^-6		Th/U	同位素比值							年龄/Ma
测点	Pb	U	Th/U	²⁰⁶Pb/ ²³⁸U	±1σ	²⁰⁷Pb/ ²³⁵U	±1σ	²⁰⁷Pb/ ²⁰⁶Pb	±1σ		²⁰⁶Pb/ ²³⁸U	±1σ	²⁰⁷Pb/ ²³⁵U	±1σ	²⁰⁷Pb/ ²⁰⁶Pb	±1σ
SPM3TC27-1	3	121	1.57	0.020 2	0.000 4	0.135 5	0.033 8	0.048 8	0.012 4	128.6		2.8	129.1	32.2	137.3	595.5
SPM3TC27-2	3	100	1.48	0.020 1	0.000 3	0.134 7	0.015 4	0.048 5	0.021 8	128.5		1.9	128.3	14.7	124.6	105 6.8
SPM3TC27-3	1	47	1.10	0.020 0	0.000 4	0.134 3	0.023 8	0.048 8	0.013 9	127.3		2.8	128.0	22.7	139.7	669.5
SPM3TC27-4	1	42	1.11	0.019 6	0.000 4	0.133 6	0.017 8	0.049 6	0.007 3	124.8		2.3	127.4	16.9	174.7	341.4
SPM3TC27-5	1	41	1.12	0.020 2	0.000 5	0.135 4	0.026 0	0.048 5	0.011 1	129.2		3.2	128.9	24.7	123.9	539.4
SPM3TC27-6	1	49	1.19	0.020 0	0.000 3	0.133 8	0.017 0	0.048 4	0.006 5	128.0		2.2	127.5	16.2	119.6	315.6
SPM3TC27-7	1	37	1.15	0.019 6	0.000 4	0.131 6	0.014 1	0.048 8	0.005 5	124.9		2.6	125.6	13.4	137.7	263.2
SPM3TC27-8	1	43	1.44	0.019 9	0.000 8	0.133 3	0.028 6	0.048 6	0.011 8	126.9		5.0	127.1	27.3	129.9	572.8
SPM3TC27-9	1	40	1.11	0.020 1	0.000 4	0.132 0	0.026 2	0.047 6	0.010 4	128.5		2.7	125.9	25.0	77.5	520.2
SPM3TC27-10	1	53	1.44	0.020 2	0.000 5	0.135 3	0.028 9	0.048 5	0.012 4	129.1		2.9	128.8	27.5	122.7	601.6
SPM3TC27-11	2	56	1.60	0.020 7	0.000 4	0.138 0	0.028 9	0.048 3	0.011 7	132.1		2.4	131.2	27.5	115.3	570.2
SPM3TC27-12	1	42	1.21	0.019 7	0.000 3	0.131 9	0.013 7	0.048 5	0.005 6	125.9		2.1	125.8	13.1	124.3	270.2
SPM3TC27-13	3	113	1.24	0.020 4	0.000 3	0.136 3	0.012 8	0.048 5	0.004 6	130.2		1.8	129.8	12.2	122.2	222.6
SPM3TC27-14	1	52	1.17	0.019 4	0.000 3	0.134 0	0.011 1	0.050 2	0.004 3	123.6		1.9	127.7	10.6	204.1	199.7
SPM3TC27-15	2	89	1.33	0.020 3	0.000 3	0.135 8	0.017 5	0.048 6	0.006 6	129.3		1.7	129.3	16.7	128.3	318.1
SPM3TC27-16	2	62	1.28	0.019 9	0.000 3	0.134 7	0.010 2	0.049 2	0.003 8	126.9		1.9	128.3	9.7	155.9	179.8
SPM3TC27-17	11	333	2.98	0.020 2	0.000 2	0.134 1	0.004 6	0.048 1	0.001 7	129.0		1.4	127.7	4.3	104.9	82.9
SPM3TC27-18	2	59	1.66	0.019 8	0.000 3	0.133 3	0.015 0	0.048 9	0.006 0	126.3		2.1	127.1	14.3	142.1	285.9
SPM3TC27-19	1	47	1.18	0.020 1	0.000 4	0.133 4	0.025 4	0.048 1	0.011 8	128.5		2.4	127.2	24.2	103.4	580.5
SPM3TC27-20	1	52	1.59	0.019 7	0.000 8	0.133 6	0.064 5	0.049 1	0.026 4	126.1		4.9	127.3	61.4	150.5	125 9.4
SPM3TC27-21	1	48	1.22	0.020 1	0.000 3	0.134 6	0.029 1	0.048 6	0.010 3	128.2		2.2	128.2	27.7	129.1	498.6
SPM3TC27-22	2	61	2.89	0.020 1	0.000 3	0.132 8	0.021 3	0.048 0	0.008 2	128.2		1.8	126.6	20.3	97.4	407.0
SPM3TC27-23	1	53	1.23	0.019 5	0.000 4	0.132 4	0.015 0	0.049 3	0.006 4	124.5		2.3	126.3	14.3	160.0	303.5
SPM3TC27-24	2	56	1.34	0.019 4	0.000 3	0.134 0	0.013 6	0.050 2	0.008 3	123.7		2.0	127.7	13.0	203.5	383.4
SPM3TC27-25	1	50	1.33	0.019 4	0.000 5	0.131 4	0.026 1	0.049 1	0.009 9	123.9		3.0	125.4	24.9	153.8	470.8
SPM3TC27-26	2	76	1.19	0.020 2	0.000 5	0.134 4	0.031 9	0.048 2	0.013 3	129.0		3.2	128.1	30.4	110.7	653.3
SPM3TC27-27	2	79	1.65	0.019 6	0.000 3	0.132 3	0.008 9	0.049 1	0.003 2	124.9		1.7	126.2	8.5	150.6	152.1
SPM3TC27-28	21	272	12.24	0.018 7	0.000 4	0.136 5	0.007 6	0.052 8	0.003 0	119.7		2.4	130.0	7.3	322.2	128.0
SPM3TC27-29	8	268	2.99	0.020 0	0.000 3	0.134 8	0.014 8	0.048 8	0.005 2	127.8		1.6	128.4	14.1	138.9	250.5
SPM3TC27-30	1	61	1.38	0.019 8	0.000 3	0.133 9	0.029 6	0.049 0	0.011 6	126.5		2.0	127.6	28.2	146.9	555.0
SPM3TC27-31	1	40	1.13	0.019 2	0.000 4	0.129 4	0.015 4	0.048 8	0.006 0	122.8		2.6	123.6	14.7	139.5	289.0
SPM3TC27-32	1	55	1.16	0.019 6	0.000 4	0.130 9	0.013 7	0.048 4	0.005 3	125.2		2.3	124.9	13.1	120.8	257.8
SPM13TC19-1	4	164	1.05	0.019 4	0.000 2	0.197 6	0.010 8	0.073 8	0.004 0	123.9		1.3	183.1	10.0	1 037.0	108.7
SPM13TC19-2	4	145	0.87	0.019 5	0.000 2	0.168 9	0.011 5	0.062 9	0.004 3	124.4		1.3	158.5	10.8	704.4	146.2
SPM13TC19-3	2	84	0.74	0.019 7	0.000 3	0.210 0	0.020 6	0.077 2	0.007 9	125.9		1.6	193.6	19.0	1 127.2	204.3
SPM13TC19-4	2	85	0.65	0.019 3	0.000 3	0.159 1	0.019 1	0.059 7	0.007 8	123.3		1.6	149.9	18.0	593.7	282.9
SPM13TC19-5	4	175	1.10	0.019 7	0.000 2	0.145 7	0.009 7	0.053 8	0.003 6	125.5		1.3	138.1	9.2	360.6	151.5
SPM13TC19-6	16	605	1.49	0.019 7	0.000 2	0.168 0	0.004 1	0.061 9	0.001 5	125.6		1.2	157.7	3.9	670.7	51.4
SPM13TC19-7	11	393	1.40	0.020 3	0.000 2	0.314 6	0.007 1	0.112 6	0.002 5	129.3		1.3	277.8	6.3	1 842.1	39.4
SPM13TC19-8	3	134	1.13	0.019 5	0.000 2	0.212 5	0.015 9	0.078 9	0.005 9	124.7		1.4	195.7	14.7	1 170.5	148.5
SPM13TC19-9	4	183	0.89	0.019 6	0.000 2	0.218 7	0.009 8	0.080 8	0.003 5	125.4		1.3	200.8	9.0	1 215.7	86.1
SPM13TC19-10	9	334	1.36	0.020 0	0.000 2	0.227 2	0.006 2	0.082 5	0.002 2	127.5		1.2	207.9	5.7	1 257.3	51.8
SPM13TC19-11	5	205	0.79	0.020 6	0.000 2	0.307 5	0.012 2	0.108 5	0.004 1	131.2		1.4	272.2	10.8	1 774.4	68.9
SPM13TC19-12	6	201	1.27	0.020 7	0.000 2	0.317 1	0.010 5	0.111 0	0.003 6	132.2		1.4	279.6	9.3	1 816.3	59.0
SPM13TC19-13	3	105	1.01	0.019 5	0.000 2	0.152 0	0.016 6	0.056 4	0.006 6	124.7		1.5	143.6	15.7	468.4	260.1
SPM13TC19-14	13	478	2.06	0.019 5	0.000 2	0.139 4	0.004 6	0.051 9	0.001 6	124.3		1.2	132.5	4.3	283.1	72.4
SPM13TC19-15	3	129	1.12	0.019 7	0.000 2	0.173 4	0.015 1	0.064 0	0.005 7	125.4		1.4	162.4	14.1	741.7	188.7
SPM13TC19-16	4	161	1.21	0.020 5	0.000 2	0.319 0	0.014 5	0.113 0	0.005 0	130.7		1.4	281.1	12.8	1 848.0	79.6
SPM13TC19-17	4	167	0.87	0.019 6	0.000 2	0.182 2	0.012 2	0.067 4	0.004 5	125.2		1.3	170.0	11.4	849.2	138.3
SPM13TC19-18	9	362	1.39	0.019 4	0.000 2	0.142 0	0.006 1	0.053 0	0.002 3	124.1		1.2	134.8	5.8	327.5	97.0
SPM13TC19-19	3	135	0.95	0.019 7	0.000 2	0.227 5	0.018 0	0.083 7	0.006 5	125.8		1.5	208.2	16.5	1 286.0	151.6
SPM13TC19-20	6	229	1.12	0.019 5	0.000 2	0.146 1	0.008 2	0.054 3	0.003 0	124.6		1.3	138.5	7.8	382.4	125.5
SPM13TC19-21	2	98	0.62	0.020 0	0.000 3	0.233 5	0.024 2	0.084 5	0.008 9	127.9		1.7	213.1	22.1	1 303.8	204.4

Table 2 Zircon Hf isotopic data of the intrusive rocks from the study area

测点	年龄/Ma	¹⁷⁶Yb/¹⁷⁷Hf	¹⁷⁶Lu/¹⁷⁷Hf	¹⁷⁶Hf/¹⁷⁷Hf	2σ	(¹⁷⁶Hf/¹⁷⁷Hf)_i	ε_Hf(0)	ε_Hf(t)	T_DM/Ma	$T D M C$ /Ma	f_Lu/Hf
SPM13TC19-1	124.4	0.034 486	0.001 143	0.282 788	0.000 023	0.282 785	0.6	3.2	660	978	-0.97
SPM13TC19-2	125.9	0.031 751	0.001 047	0.282 736	0.000 019	0.282 733	-1.3	1.4	732	1 094	-0.97
SPM13TC19-3	123.3	0.048 326	0.001 598	0.282 741	0.000 022	0.282 738	-1.1	1.5	735	1 086	-0.95
SPM13TC19-4	125.4	0.051 590	0.001 555	0.282 774	0.000 018	0.282 770	0.1	2.7	687	1 010	-0.95
SPM13TC19-5	124.7	0.048 914	0.001 511	0.282 765	0.000 022	0.282 761	-0.3	2.4	700	1 031	-0.95
SPM13TC19-6	124.3	0.054 456	0.001 697	0.282 753	0.000 018	0.282 749	-0.7	1.9	721	1 060	-0.95
SPM13TC19-7	125.4	0.084 832	0.002 566	0.282 724	0.000 018	0.282 718	-1.7	0.8	781	1 129	-0.92
SPM13TC19-8	124.1	0.102 235	0.003 124	0.282 767	0.000 019	0.282 760	-0.2	2.3	729	1 035	-0.91
SPM13TC19-9	125.8	0.049 982	0.001 541	0.282 772	0.000 018	0.282 769	0.0	2.6	690	1 014	-0.95
SPM13TC19-10	124.6	0.085 726	0.002 616	0.282 822	0.000 018	0.282 816	1.8	4.3	636	907	-0.92
SPM13TC19-11	127.9	0.030 372	0.000 971	0.282 741	0.000 017	0.282 739	-1.1	1.6	723	1 080	-0.97

Table 2 Zircon Hf isotopic data of the intrusive rocks from the study area

测点	年龄/Ma	¹⁷⁶Yb/¹⁷⁷Hf	¹⁷⁶Lu/¹⁷⁷Hf	¹⁷⁶Hf/¹⁷⁷Hf	2σ	(¹⁷⁶Hf/¹⁷⁷Hf)_i	ε_Hf(0)	ε_Hf(t)	T_DM/Ma	$T D M C$ /Ma	f_Lu/Hf
SPM13TC19-1	124.4	0.034 486	0.001 143	0.282 788	0.000 023	0.282 785	0.6	3.2	660	978	-0.97
SPM13TC19-2	125.9	0.031 751	0.001 047	0.282 736	0.000 019	0.282 733	-1.3	1.4	732	1 094	-0.97
SPM13TC19-3	123.3	0.048 326	0.001 598	0.282 741	0.000 022	0.282 738	-1.1	1.5	735	1 086	-0.95
SPM13TC19-4	125.4	0.051 590	0.001 555	0.282 774	0.000 018	0.282 770	0.1	2.7	687	1 010	-0.95
SPM13TC19-5	124.7	0.048 914	0.001 511	0.282 765	0.000 022	0.282 761	-0.3	2.4	700	1 031	-0.95
SPM13TC19-6	124.3	0.054 456	0.001 697	0.282 753	0.000 018	0.282 749	-0.7	1.9	721	1 060	-0.95
SPM13TC19-7	125.4	0.084 832	0.002 566	0.282 724	0.000 018	0.282 718	-1.7	0.8	781	1 129	-0.92
SPM13TC19-8	124.1	0.102 235	0.003 124	0.282 767	0.000 019	0.282 760	-0.2	2.3	729	1 035	-0.91
SPM13TC19-9	125.8	0.049 982	0.001 541	0.282 772	0.000 018	0.282 769	0.0	2.6	690	1 014	-0.95
SPM13TC19-10	124.6	0.085 726	0.002 616	0.282 822	0.000 018	0.282 816	1.8	4.3	636	907	-0.92
SPM13TC19-11	127.9	0.030 372	0.000 971	0.282 741	0.000 017	0.282 739	-1.1	1.6	723	1 080	-0.97

Table 3 Major, rare earth and trace element compositions of the intrusive rocks from the study area

样品号	w_B/%																										Mg^#			A/CNK		w_B/10^-6
样品号	SiO₂		TiO₂		Al₂O₃		Fe₂O₃		FeO		MnO		MgO		CaO		Na₂O		K₂O		P₂O₅		烧失量		总量		Mg^#			A/CNK		Li		Be
SPM2TC28	52.07		1.21		18.51		3.79		4.86		0.12		4.42		8.16		3.72		1.38		0.33		1.11		99.69		49.03			0.83		7.81		1.39
SPM2TC54	51.27		1.10		17.84		4.64		3.50		0.11		3.71		8.06		2.78		2.15		0.36		4.16		99.68		46.53			0.83		15.9		1.29
SPM13TC8	59.72		0.73		16.93		2.99		2.69		0.13		2.00		4.48		4.31		3.32		0.38		2.06		99.73		40.10			0.90		22.2		2.78
SPM13TC19	57.40		0.92		18.83		2.87		2.69		0.10		2.06		4.68		4.81		3.26		0.45		1.53		99.61		41.32			0.94		17.9		2.07
SPM14TC92	58.89		0.80		17.13		3.78		3.05		0.11		2.14		5.21		4.55		2.34		0.38		1.30		99.70		37.33			0.88		10.6		1.66
SPM14TC66	58.38		0.94		17.01		4.32		2.42		0.12		2.58		4.53		4.17		2.93		0.30		1.99		99.69		42.41			0.93		14.0		2.45
SPM14TC86	59.28		0.80		16.97		4.84		1.68		0.14		2.30		4.41		4.13		2.82		0.32		2.02		99.71		40.69			0.95		10.5		1.95
SPM9-5-1	68.18		0.44		15.60		1.73		1.21		0.06		0.90		2.24		4.44		3.89		0.14		0.91		99.74		36.91			1.00		12.6		2.42
D2012	65.43		0.67		15.30		2.39		1.46		0.06		1.56		1.82		4.33		4.43		0.17		2.16		99.78		43.82			1.01		25.8		3.18
SPM7-2-2	62.82		0.94		16.74		1.95		2.95		0.11		1.15		2.23		4.48		5.10		0.35		0.91		99.73		30.56			0.99		13.2		3.96
SPM13TC84	66.61		0.54		16.50		2.34		0.69		0.08		0.67		0.87		4.77		5.57		0.15		0.95		99.75		30.14			1.07		10.0		3.41
SPM3TC27	68.92		0.53		15.32		1.73		1.03		0.08		0.81		1.33		4.94		4.17		0.14		0.78		99.80		36.07			1.02		19.2		2.32
样品号	w_B/10^-6
样品号	Sc	V		Cr		Co		Ni		Cu		Ga		Rb		Sr		Y		Zr		Nb		Ba		La		Ce	Pr		Nd		Sm
SPM2TC28	25.3	232		51.7		33.7		25.6		64.4		24.6		28.7		1351		17.8		128		6.56		694		19.4		41.7	5.81		25.7		5.47
SPM2TC54	19.8	219		42.0		25.9		13.0		57.4		21.5		54.6		1330		16.1		118		6.78		702		22.1		45.4	6.15		25.2		5.25
SPM13TC8	10.1	117		14.6		11.2		1.23		20.7		21.8		103		899		18.5		170		11.5		728		28.2		61.8	8.05		31.4		5.82
SPM13TC19	8.62	91.7		17.0		9.99		2.72		16.6		22.3		81.1		1245		17.0		183		11.2		1141		32.0		71.0	9.19		36.3		6.10
SPM14TC92	12.0	125		16.0		13.0		1.97		17.8		23.2		66.8		1172		19.6		134		6.91		826.		28.0		57.3	7.20		29.3		5.76
SPM14TC66	15.4	167		19.4		14.9		11.8		21.7		25.5		99.6		1075		19.7		250		12.1		1005		28.5		63.9	8.99		36.3		6.87
SPM14TC86	11.7	133		5.03		11.4		2.12		24.1		22.4		80.3		933		21.1		164		7.95		970		32.7		58.4	7.83		30.9		5.93
SPM9-5-1	5.57	52.4		17.1		5.16		1.98		11.6		18.6		116		548		13.9		222		10.9		905		33.1		67.0	7.45		25.7		4.08
D2012	7.22	81.3		43.3		11.0		18.6		27.1		22.7		187		389		13.4		308		11.1		725		38.9		82.7	9.78		34.0		5.37
SPM7-2-2	10.1	48.3		5.47		7.09		1.82		5.80		21.5		92.8		505		30.7		436		53.0		1006		57.5		123	12.3		44.5		8.19
SPM13TC84	6.60	35.0		4.92		2.81		1.35		3.23		22.4		197		307		18.8		391		19.7		1126		36.7		78.5	8.86		33.1		5.61
SPM3TC27	5.04	40.6		3.02		3.49		1.41		4.12		21.6		88.2		460		19.0		247		12.6		907		40.5		74.1	10.0		36.5		6.11
样品号	w_B/10^-6
样品号	Eu	Gd		Tb		Dy		Ho		Er		Tm		Yb		Lu		Hf		Ta		Pb		Th		U		Mo	δEu		(La/Yb)_N
SPM2TC28	1.58	4.37		0.67		3.57		0.7		1.94		0.31		1.78		0.36		3.4		0.44		12.1		2.09		0.57		0.54	0.96		7.82
SPM2TC54	1.54	4.1		0.62		3.45		0.64		1.79		0.28		1.52		0.34		3.19		0.5		10.2		2.96		0.8		0.66	0.98		10.43
SPM13TC8	1.49	4.64		0.73		3.89		0.71		2.10		0.34		2.25		0.40		5.24		0.79		12.5		8.43		1.08		0.4	0.85		8.98
SPM13TC19	1.73	4.98		0.72		3.80		0.65		1.95		0.30		1.89		0.32		4.94		0.69		12.9		5.24		1.04		0.29	0.93		12.09
SPM14TC92	1.74	4.95		0.77		4.08		0.77		2.30		0.35		2.45		0.34		4.42		0.51		12.2		3.89		1.21		0.63	0.97		8.21
SPM14TC66	1.56	5.23		0.74		4.11		0.74		2.14		0.34		1.84		0.46		6.08		0.77		14.1		10.9		2.2		0.89	0.76		11.11
SPM14TC86	1.6	4.78		0.74		4.07		0.78		2.22		0.36		2.1		0.38		5.13		0.65		10.8		8		1.01		0.47	0.89		11.17
SPM9-5-1	0.96	3.37		0.48		2.58		0.49		1.52		0.25		1.83		0.33		7.21		0.82		18.1		12.7		1.68		1.06	0.77		12.98
D2012	1.00	4.24		0.58		2.73		0.46		1.47		0.22		1.46		0.41		8.39		0.90		25.3		27.2		3.45		1.26	0.62		19.09
SPM7-2-2	2.25	7.26		1.11		6.39		1.16		3.29		0.53		3		0.41		18.5		2.98		19.5		11.1		1.35		0.45	0.87		13.75
SPM13TC84	1.04	4.49		0.66		3.58		0.68		2.05		0.35		2.08		0.62		8.71		1.15		16.8		11.7		2.42		1.83	0.61		12.66
SPM3TC27	1.26	4.63		0.69		3.64		0.67		2.03		0.31		1.89		0.30		11.6		0.98		24.6		11.6		1.23		0.76	0.70		15.34

Table 3 Major, rare earth and trace element compositions of the intrusive rocks from the study area

样品号	w_B/%																										Mg^#			A/CNK		w_B/10^-6
样品号	SiO₂		TiO₂		Al₂O₃		Fe₂O₃		FeO		MnO		MgO		CaO		Na₂O		K₂O		P₂O₅		烧失量		总量		Mg^#			A/CNK		Li		Be
SPM2TC28	52.07		1.21		18.51		3.79		4.86		0.12		4.42		8.16		3.72		1.38		0.33		1.11		99.69		49.03			0.83		7.81		1.39
SPM2TC54	51.27		1.10		17.84		4.64		3.50		0.11		3.71		8.06		2.78		2.15		0.36		4.16		99.68		46.53			0.83		15.9		1.29
SPM13TC8	59.72		0.73		16.93		2.99		2.69		0.13		2.00		4.48		4.31		3.32		0.38		2.06		99.73		40.10			0.90		22.2		2.78
SPM13TC19	57.40		0.92		18.83		2.87		2.69		0.10		2.06		4.68		4.81		3.26		0.45		1.53		99.61		41.32			0.94		17.9		2.07
SPM14TC92	58.89		0.80		17.13		3.78		3.05		0.11		2.14		5.21		4.55		2.34		0.38		1.30		99.70		37.33			0.88		10.6		1.66
SPM14TC66	58.38		0.94		17.01		4.32		2.42		0.12		2.58		4.53		4.17		2.93		0.30		1.99		99.69		42.41			0.93		14.0		2.45
SPM14TC86	59.28		0.80		16.97		4.84		1.68		0.14		2.30		4.41		4.13		2.82		0.32		2.02		99.71		40.69			0.95		10.5		1.95
SPM9-5-1	68.18		0.44		15.60		1.73		1.21		0.06		0.90		2.24		4.44		3.89		0.14		0.91		99.74		36.91			1.00		12.6		2.42
D2012	65.43		0.67		15.30		2.39		1.46		0.06		1.56		1.82		4.33		4.43		0.17		2.16		99.78		43.82			1.01		25.8		3.18
SPM7-2-2	62.82		0.94		16.74		1.95		2.95		0.11		1.15		2.23		4.48		5.10		0.35		0.91		99.73		30.56			0.99		13.2		3.96
SPM13TC84	66.61		0.54		16.50		2.34		0.69		0.08		0.67		0.87		4.77		5.57		0.15		0.95		99.75		30.14			1.07		10.0		3.41
SPM3TC27	68.92		0.53		15.32		1.73		1.03		0.08		0.81		1.33		4.94		4.17		0.14		0.78		99.80		36.07			1.02		19.2		2.32
样品号	w_B/10^-6
样品号	Sc	V		Cr		Co		Ni		Cu		Ga		Rb		Sr		Y		Zr		Nb		Ba		La		Ce	Pr		Nd		Sm
SPM2TC28	25.3	232		51.7		33.7		25.6		64.4		24.6		28.7		1351		17.8		128		6.56		694		19.4		41.7	5.81		25.7		5.47
SPM2TC54	19.8	219		42.0		25.9		13.0		57.4		21.5		54.6		1330		16.1		118		6.78		702		22.1		45.4	6.15		25.2		5.25
SPM13TC8	10.1	117		14.6		11.2		1.23		20.7		21.8		103		899		18.5		170		11.5		728		28.2		61.8	8.05		31.4		5.82
SPM13TC19	8.62	91.7		17.0		9.99		2.72		16.6		22.3		81.1		1245		17.0		183		11.2		1141		32.0		71.0	9.19		36.3		6.10
SPM14TC92	12.0	125		16.0		13.0		1.97		17.8		23.2		66.8		1172		19.6		134		6.91		826.		28.0		57.3	7.20		29.3		5.76
SPM14TC66	15.4	167		19.4		14.9		11.8		21.7		25.5		99.6		1075		19.7		250		12.1		1005		28.5		63.9	8.99		36.3		6.87
SPM14TC86	11.7	133		5.03		11.4		2.12		24.1		22.4		80.3		933		21.1		164		7.95		970		32.7		58.4	7.83		30.9		5.93
SPM9-5-1	5.57	52.4		17.1		5.16		1.98		11.6		18.6		116		548		13.9		222		10.9		905		33.1		67.0	7.45		25.7		4.08
D2012	7.22	81.3		43.3		11.0		18.6		27.1		22.7		187		389		13.4		308		11.1		725		38.9		82.7	9.78		34.0		5.37
SPM7-2-2	10.1	48.3		5.47		7.09		1.82		5.80		21.5		92.8		505		30.7		436		53.0		1006		57.5		123	12.3		44.5		8.19
SPM13TC84	6.60	35.0		4.92		2.81		1.35		3.23		22.4		197		307		18.8		391		19.7		1126		36.7		78.5	8.86		33.1		5.61
SPM3TC27	5.04	40.6		3.02		3.49		1.41		4.12		21.6		88.2		460		19.0		247		12.6		907		40.5		74.1	10.0		36.5		6.11
样品号	w_B/10^-6
样品号	Eu	Gd		Tb		Dy		Ho		Er		Tm		Yb		Lu		Hf		Ta		Pb		Th		U		Mo	δEu		(La/Yb)_N
SPM2TC28	1.58	4.37		0.67		3.57		0.7		1.94		0.31		1.78		0.36		3.4		0.44		12.1		2.09		0.57		0.54	0.96		7.82
SPM2TC54	1.54	4.1		0.62		3.45		0.64		1.79		0.28		1.52		0.34		3.19		0.5		10.2		2.96		0.8		0.66	0.98		10.43
SPM13TC8	1.49	4.64		0.73		3.89		0.71		2.10		0.34		2.25		0.40		5.24		0.79		12.5		8.43		1.08		0.4	0.85		8.98
SPM13TC19	1.73	4.98		0.72		3.80		0.65		1.95		0.30		1.89		0.32		4.94		0.69		12.9		5.24		1.04		0.29	0.93		12.09
SPM14TC92	1.74	4.95		0.77		4.08		0.77		2.30		0.35		2.45		0.34		4.42		0.51		12.2		3.89		1.21		0.63	0.97		8.21
SPM14TC66	1.56	5.23		0.74		4.11		0.74		2.14		0.34		1.84		0.46		6.08		0.77		14.1		10.9		2.2		0.89	0.76		11.11
SPM14TC86	1.6	4.78		0.74		4.07		0.78		2.22		0.36		2.1		0.38		5.13		0.65		10.8		8		1.01		0.47	0.89		11.17
SPM9-5-1	0.96	3.37		0.48		2.58		0.49		1.52		0.25		1.83		0.33		7.21		0.82		18.1		12.7		1.68		1.06	0.77		12.98
D2012	1.00	4.24		0.58		2.73		0.46		1.47		0.22		1.46		0.41		8.39		0.90		25.3		27.2		3.45		1.26	0.62		19.09
SPM7-2-2	2.25	7.26		1.11		6.39		1.16		3.29		0.53		3		0.41		18.5		2.98		19.5		11.1		1.35		0.45	0.87		13.75
SPM13TC84	1.04	4.49		0.66		3.58		0.68		2.05		0.35		2.08		0.62		8.71		1.15		16.8		11.7		2.42		1.83	0.61		12.66
SPM3TC27	1.26	4.63		0.69		3.64		0.67		2.03		0.31		1.89		0.30		11.6		0.98		24.6		11.6		1.23		0.76	0.70		15.34

Table 4 Sr-Nd isotopic compositions of the intrusive rocks from the study area

样品号	岩性	⁸⁷Rb/⁸⁶Sr	⁸⁷Sr/⁸⁶Sr	2σ	(⁸⁷Sr/⁸⁶Sr)_i	¹⁴⁷Sm/¹⁴⁴Nd	¹⁴³Nd/¹⁴⁴Nd	2σ	(¹⁴³Nd/¹⁴⁴Nd)_i	ε_Nd(t)
SPM3TC27	酸性岩样品	0.557 0	0.706 512	6	0.705 507	0.103 3	0.512 472	3	0.512 386	-1.72
PM17TC34^*		0.766 6	0.707 697	6	0.706 313	0.095 2	0.512 438	9	0.512 359	-2.26
0075-3^*		0.568 2	0.706 208	14	0.705 182	0.1	0.512 598	12	0.512 515	0.79
0075-4^*		3.703 2	0.709 796	13	0.703 112	0.09	0.512 549	13	0.512 474	-0.01
0076-2^*		0.814 0	0.706 878	14	0.705 409	0.09	0.512 541	10	0.512 466	-0.16
0076-9^*		1.209 3	0.707 674	11	0.705 491	0.11	0.512 553	14	0.512 462	-0.25
05TH05^*	基性岩样品	0.238 4	0.705 947	14	0.705 517	0.118 4	0.512 503	12	0.512 405	-1.36
05TH10^*		0.088 8	0.707 665	13	0.707 505	0.115	0.512 285	15	0.512 189	-5.56
05TH11^*		0.122 2	0.707 794	10	0.707 573	0.067 8	0.512 527	13	0.512 471	-0.08
05TH12^*		0.345 8	0.706 747	12	0.706 123	0.107 4	0.512 567	18	0.512 478	0.06
05TH14^*		0.262 9	0.706 191	10	0.705 716	0.108 1	0.512 494	15	0.512 404	-1.37
05TH16^*		0.217 5	0.706 368	10	0.705 975	0.109 9	0.512 52	12	0.512 429	-0.90
05TH17^*		0.166 0	0.706 297	14	0.705 997	0.110 7	0.5124 93	12	0.512 401	-1.44
05TH19^*		0.100 1	0.706 934	12	0.706 753	0.109 1	0.5123 82	13	0.512 291	-3.58
05TH21^*		0.096 9	0.707 002	12	0.706 827	0.067 3	0.5125 49	13	0.512 493	0.36
05TH23^*		0.112 3	0.705 952	14	0.705 749	0.124 1	0.5125 26	14	0.512 423	-1.01
05TH25^*		0.066 2	0.705 836	10	0.705 717	0.110 2	0.5125 37	11	0.512 445	-0.57
05TH26^*		0.070 9	0.705 816	14	0.705 688	0.178 8	0.5124 08	13	0.512 259	-4.20
05TH27^*		0.160 1	0.708 140	12	0.707 851	0.190 2	0.5122 83	11	0.512 125	-6.82

Fig.3 Zircon CL images and concordia diagrams for the intrusive rocks from the study area

Fig.4 SiO2 vs.K2O diagram (a) and A/CNK vs. A/NK diagram (b) of the intrusive rocks from the study area

Fig.5 Chondrite-normalized REE patterns (a) and primitive mantle-normalized trace elements spidergram (b) of intrusive rocks from the study area

Fig.6 Histograms of initial 87Sr/86Sr value (a) and εNd(t) (b)

Fig.7 Harker variation diagrams of intrusive rocks from the study area[27]

Fig.8 Diagrams of Ta/Yb vs.Th/Yb(a), Th/Sm vs. Th/Yb (b) and Nb/Y vs. Ba/Th (c)

Fig.9 Diagrams of Sm vs.Sm/Yb (a) and La/Sm vs. Sm/Yb (b)

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