Late Devonian Tectonic Transition in South Altyn Tagh: Constraints from Geochronology and Geochemistry of the Suoerkuli Monzogranite

doi:10.19657/j.geoscience.1000-8527.2020.107

Abstract

Abstract:

Whole-rock major, rare earth and trace element compositions, as well as LA-ICP-MS zircon U-Pb ages of monzogranites from Suoerkuli in the Altyn Orogen are newly presented. LA-ICP-MS zircon U-Pb dating indicates that the monzogranites were formed at (377.5±1.6) Ma and (377.4±2.1) Ma. Geochemically, the rocks are characterized by relatively high Si (72.55%-76.41%) and total alkaline (K₂O+Na₂O=7.32%-8.59%), normal aluminum saturation index (A/CNK=0.92-1.08), and high TFeO/MgO (2.57-6.47), suggesting that the rocks are high-K calc-alkaline. These rocks have relatively high LREEs and remarkable negative Eu anomalies. Furthermore, they are enriched in elements of Rb, Th, Y, Zr, Hf and depleted in Ba, Sr, P, Ti. According to the geochemical characteristics, it is suggested that the monzogranites are classified as A1-type. The monzogranites were likely generated by the fractionation of the parental magma, which was produced by the partial melting of felsic crustal rocks led by mantle-derived material underplating. Based on the regional geological investigations and spatial-temporal distribution of the igneous rocks, we considered that the monzogranite was emplaced in an intraplate extensional environment, and generated in the transition from post-orogenic to intraplate tectonic regime in the Late Devonian.

Key words: zircon U-Pb geochronology, A-type granite, intraplate extension, Altyn Tagh

CLC Number:

YUAN Yaping, LIU Xiangdong, ZHANG Zhenkai, ZENG Zhongcheng, HE Yuanfang. Late Devonian Tectonic Transition in South Altyn Tagh: Constraints from Geochronology and Geochemistry of the Suoerkuli Monzogranite[J]. Geoscience, 2021, 35(04): 940-954.

Figures/Tables 12

References 79

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测点号	同位素比值									年龄/Ma
测点号	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	²⁰⁸Pb/²³²Th	1σ		²⁰⁷Pb/²⁰⁶Pb		1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ
D6533/1-1	0.055 50	0.001 61	0.461 45	0.012 52	0.060 28	0.000 48	0.018 28	0.000 27	432.2		63.13		385.3	8.70	377.4	2.91
D6533/1-2	0.057 26	0.002 27	0.476 52	0.018 09	0.060 34	0.000 62	0.019 43	0.000 45	501.2		85.49		395.7	12.44	377.7	3.79
D6533/1-3	0.115 44	0.005 22	0.822 90	0.035 06	0.051 69	0.000 82	0.025 35	0.000 73	1 886.8		79.18		609.7	19.53	324.9	5.03
D6533/1-4	0.062 63	0.003 17	0.521 22	0.025 43	0.060 35	0.000 82	0.017 76	0.000 51	695.6		104.20		426.0	16.97	377.7	4.99
D6533/1-5	0.053 27	0.002 34	0.443 07	0.018 74	0.060 32	0.000 65	0.017 91	0.000 37	340.1		96.15		372.4	13.19	377.5	3.95
D6533/1-6	0.053 89	0.001 67	0.448 47	0.013 06	0.060 34	0.000 49	0.018 71	0.000 31	366.4		68.06		376.2	9.16	377.7	3.00
D6533/1-7	0.053 25	0.002 59	0.443 44	0.020 84	0.060 39	0.000 74	0.017 85	0.000 45	339.5		106.21		372.7	14.66	378.0	4.51
D6533/1-8	0.057 09	0.001 72	0.474 13	0.013 41	0.060 23	0.000 51	0.018 26	0.000 31	494.3		65.68		394.0	9.24	377.0	3.08
D6533/1-9	0.052 81	0.002 10	0.439 41	0.016 80	0.060 34	0.000 60	0.018 30	0.000 36	320.5		88.04		369.8	11.85	377.7	3.67
D6533/1-10	0.054 10	0.001 57	0.449 76	0.012 19	0.060 29	0.000 48	0.018 56	0.000 27	374.9		63.71		377.1	8.53	377.4	2.93
D6533/1-11	0.054 53	0.001 84	0.453 32	0.014 54	0.060 29	0.000 54	0.018 82	0.000 34	392.8		73.32		379.6	10.16	377.4	3.28
D6533/1-12	0.052 61	0.001 55	0.437 81	0.012 13	0.060 35	0.000 48	0.018 10	0.000 27	312.1		65.62		368.7	8.56	377.7	2.92
D6533/1-13	0.050 25	0.001 79	0.417 44	0.014 22	0.060 25	0.000 55	0.018 15	0.000 39	206.4		80.72		354.2	10.19	377.1	3.34
D6533/1-14	0.055 15	0.003 49	0.458 13	0.028 16	0.060 24	0.000 98	0.017 41	0.000 55	418.4		135.44		383.0	19.61	377.1	5.96
D6533/1-15	0.051 78	0.002 43	0.431 06	0.019 57	0.060 38	0.000 69	0.017 86	0.000 43	275.6		103.88		363.9	13.89	377.9	4.19
D6533/1-16	0.053 34	0.001 87	0.444 06	0.014 79	0.060 37	0.000 57	0.018 67	0.000 38	343.3		77.16		373.1	10.40	377.9	3.44
D6533/1-17	0.067 61	0.002 15	0.461 14	0.013 80	0.049 46	0.000 46	0.017 66	0.000 31	856.7		64.67		385.0	9.59	311.2	2.82
D6533/1-18	0.241 44	0.004 61	2.008 88	0.032 16	0.060 34	0.000 55	0.046 20	0.000 49	3 129.5		30.07		1 118.5	10.85	377.7	3.32
D6533/1-19	0.103 45	0.002 79	0.766 22	0.018 96	0.053 71	0.000 50	0.024 25	0.000 40	1 687.0		48.91		577.6	10.90	337.3	3.07
D6533/1-20	0.055 32	0.001 67	0.460 45	0.013 10	0.060 36	0.000 51	0.018 00	0.000 25	425.1		65.48		384.6	9.10	377.8	3.11
D6533/1-21	0.058 50	0.002 58	0.486 00	0.020 64	0.060 24	0.000 72	0.021 50	0.000 54	548.7		93.52		402.2	14.10	377.1	4.39
D6533/1-22	0.061 04	0.002 35	0.508 21	0.018 78	0.060 37	0.000 64	0.020 85	0.000 45	640.6		80.86		417.2	12.64	377.9	3.89
D6533/1-23	0.057 73	0.002 12	0.479 92	0.016 87	0.060 28	0.000 61	0.019 09	0.000 34	519.2		79.00		398.0	11.58	377.4	3.72
D6533/1-24	0.059 82	0.003 83	0.498 08	0.031 00	0.060 38	0.001 04	0.021 45	0.000 85	596.9		132.97		410.4	21.01	377.9	6.33
PM034/3-1	0.065 37	0.002 84	0.543 27	0.022 62	0.060 24	0.000 74	0.022 65	0.000 51	786.4		88.65		440.6	14.88	377.1	4.49
PM034/3-2	0.087 93	0.003 31	0.731 75	0.026 08	0.060 32	0.000 72	0.031 05	0.000 67	1 381.0		70.61		557.6	15.29	377.6	4.39
PM034/3-3	0.061 14	0.003 91	0.508 28	0.031 54	0.060 27	0.001 03	0.021 88	0.000 81	644.1		131.65		417.3	21.23	377.3	6.24
PM034/3-4	0.082 27	0.002 72	0.684 25	0.021 21	0.060 30	0.000 62	0.025 09	0.000 49	1 252.0		63.19		529.3	12.78	377.4	3.79
PM034/3-5	0.066 97	0.002 94	0.557 81	0.023 47	0.060 39	0.000 74	0.022 04	0.000 52	836.9		88.81		450.1	15.30	378.0	4.51
PM034/3-6	0.062 78	0.002 79	0.521 98	0.022 30	0.060 28	0.000 73	0.020 49	0.000 53	700.9		91.97		426.5	14.88	377.3	4.46
PM034/3-7	0.056 44	0.002 59	0.468 97	0.020 71	0.060 25	0.000 73	0.019 09	0.000 48	468.9		99.18		390.5	14.31	377.2	4.46
PM034/3-8	0.140 77	0.003 60	1.172 23	0.026 95	0.060 39	0.000 60	0.044 62	0.000 69	2 236.7		43.63		787.7	12.60	378.0	3.67
PM034/3-9	0.076 19	0.002 80	0.633 54	0.022 04	0.060 30	0.000 65	0.025 12	0.000 53	1 100.1		71.71		498.3	13.70	377.4	3.95
PM034/3-10	0.071 40	0.007 26	0.594 72	0.058 90	0.060 40	0.001 76	0.021 35	0.001 31	969.0		194.80		473.9	37.50	378.1	10.70
PM034/3-11	0.069 00	0.001 90	0.573 59	0.014 63	0.060 28	0.000 49	0.020 44	0.000 29	898.9		55.83		460.3	9.44	377.3	3.00
PM034/3-12	0.065 71	0.003 53	0.546 78	0.028 38	0.060 35	0.000 90	0.021 33	0.000 67	797.2		108.81		442.9	18.63	377.7	5.47
PM034/3-13	0.054 58	0.004 20	0.453 47	0.034 10	0.060 26	0.001 13	0.017 14	0.000 75	395.1		163.95		379.7	23.82	377.2	6.89
PM034/3-14	0.129 91	0.004 21	0.956 97	0.028 69	0.053 43	0.000 63	0.031 26	0.000 60	2 096.7		55.89		681.7	14.88	335.5	3.84
PM034/3-15	0.069 31	0.002 14	0.575 93	0.016 70	0.060 26	0.000 55	0.021 86	0.000 38	908.1		62.47		461.8	10.76	377.2	3.33
PM034/3-16	0.060 10	0.002 40	0.499 73	0.019 07	0.060 31	0.000 64	0.018 42	0.000 45	607.1		83.99		411.5	12.91	377.5	3.91
PM034/3-17	0.055 68	0.002 67	0.462 57	0.021 42	0.060 25	0.000 72	0.018 86	0.000 52	439.4		103.51		386.0	14.87	377.1	4.38
PM034/3-18	0.064 13	0.002 34	0.533 93	0.018 50	0.060 38	0.000 60	0.019 98	0.000 44	746.0		75.15		434.4	12.25	377.9	3.67

测点号	同位素比值									年龄/Ma
测点号	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	²⁰⁸Pb/²³²Th	1σ		²⁰⁷Pb/²⁰⁶Pb		1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ
D6533/1-1	0.055 50	0.001 61	0.461 45	0.012 52	0.060 28	0.000 48	0.018 28	0.000 27	432.2		63.13		385.3	8.70	377.4	2.91
D6533/1-2	0.057 26	0.002 27	0.476 52	0.018 09	0.060 34	0.000 62	0.019 43	0.000 45	501.2		85.49		395.7	12.44	377.7	3.79
D6533/1-3	0.115 44	0.005 22	0.822 90	0.035 06	0.051 69	0.000 82	0.025 35	0.000 73	1 886.8		79.18		609.7	19.53	324.9	5.03
D6533/1-4	0.062 63	0.003 17	0.521 22	0.025 43	0.060 35	0.000 82	0.017 76	0.000 51	695.6		104.20		426.0	16.97	377.7	4.99
D6533/1-5	0.053 27	0.002 34	0.443 07	0.018 74	0.060 32	0.000 65	0.017 91	0.000 37	340.1		96.15		372.4	13.19	377.5	3.95
D6533/1-6	0.053 89	0.001 67	0.448 47	0.013 06	0.060 34	0.000 49	0.018 71	0.000 31	366.4		68.06		376.2	9.16	377.7	3.00
D6533/1-7	0.053 25	0.002 59	0.443 44	0.020 84	0.060 39	0.000 74	0.017 85	0.000 45	339.5		106.21		372.7	14.66	378.0	4.51
D6533/1-8	0.057 09	0.001 72	0.474 13	0.013 41	0.060 23	0.000 51	0.018 26	0.000 31	494.3		65.68		394.0	9.24	377.0	3.08
D6533/1-9	0.052 81	0.002 10	0.439 41	0.016 80	0.060 34	0.000 60	0.018 30	0.000 36	320.5		88.04		369.8	11.85	377.7	3.67
D6533/1-10	0.054 10	0.001 57	0.449 76	0.012 19	0.060 29	0.000 48	0.018 56	0.000 27	374.9		63.71		377.1	8.53	377.4	2.93
D6533/1-11	0.054 53	0.001 84	0.453 32	0.014 54	0.060 29	0.000 54	0.018 82	0.000 34	392.8		73.32		379.6	10.16	377.4	3.28
D6533/1-12	0.052 61	0.001 55	0.437 81	0.012 13	0.060 35	0.000 48	0.018 10	0.000 27	312.1		65.62		368.7	8.56	377.7	2.92
D6533/1-13	0.050 25	0.001 79	0.417 44	0.014 22	0.060 25	0.000 55	0.018 15	0.000 39	206.4		80.72		354.2	10.19	377.1	3.34
D6533/1-14	0.055 15	0.003 49	0.458 13	0.028 16	0.060 24	0.000 98	0.017 41	0.000 55	418.4		135.44		383.0	19.61	377.1	5.96
D6533/1-15	0.051 78	0.002 43	0.431 06	0.019 57	0.060 38	0.000 69	0.017 86	0.000 43	275.6		103.88		363.9	13.89	377.9	4.19
D6533/1-16	0.053 34	0.001 87	0.444 06	0.014 79	0.060 37	0.000 57	0.018 67	0.000 38	343.3		77.16		373.1	10.40	377.9	3.44
D6533/1-17	0.067 61	0.002 15	0.461 14	0.013 80	0.049 46	0.000 46	0.017 66	0.000 31	856.7		64.67		385.0	9.59	311.2	2.82
D6533/1-18	0.241 44	0.004 61	2.008 88	0.032 16	0.060 34	0.000 55	0.046 20	0.000 49	3 129.5		30.07		1 118.5	10.85	377.7	3.32
D6533/1-19	0.103 45	0.002 79	0.766 22	0.018 96	0.053 71	0.000 50	0.024 25	0.000 40	1 687.0		48.91		577.6	10.90	337.3	3.07
D6533/1-20	0.055 32	0.001 67	0.460 45	0.013 10	0.060 36	0.000 51	0.018 00	0.000 25	425.1		65.48		384.6	9.10	377.8	3.11
D6533/1-21	0.058 50	0.002 58	0.486 00	0.020 64	0.060 24	0.000 72	0.021 50	0.000 54	548.7		93.52		402.2	14.10	377.1	4.39
D6533/1-22	0.061 04	0.002 35	0.508 21	0.018 78	0.060 37	0.000 64	0.020 85	0.000 45	640.6		80.86		417.2	12.64	377.9	3.89
D6533/1-23	0.057 73	0.002 12	0.479 92	0.016 87	0.060 28	0.000 61	0.019 09	0.000 34	519.2		79.00		398.0	11.58	377.4	3.72
D6533/1-24	0.059 82	0.003 83	0.498 08	0.031 00	0.060 38	0.001 04	0.021 45	0.000 85	596.9		132.97		410.4	21.01	377.9	6.33
PM034/3-1	0.065 37	0.002 84	0.543 27	0.022 62	0.060 24	0.000 74	0.022 65	0.000 51	786.4		88.65		440.6	14.88	377.1	4.49
PM034/3-2	0.087 93	0.003 31	0.731 75	0.026 08	0.060 32	0.000 72	0.031 05	0.000 67	1 381.0		70.61		557.6	15.29	377.6	4.39
PM034/3-3	0.061 14	0.003 91	0.508 28	0.031 54	0.060 27	0.001 03	0.021 88	0.000 81	644.1		131.65		417.3	21.23	377.3	6.24
PM034/3-4	0.082 27	0.002 72	0.684 25	0.021 21	0.060 30	0.000 62	0.025 09	0.000 49	1 252.0		63.19		529.3	12.78	377.4	3.79
PM034/3-5	0.066 97	0.002 94	0.557 81	0.023 47	0.060 39	0.000 74	0.022 04	0.000 52	836.9		88.81		450.1	15.30	378.0	4.51
PM034/3-6	0.062 78	0.002 79	0.521 98	0.022 30	0.060 28	0.000 73	0.020 49	0.000 53	700.9		91.97		426.5	14.88	377.3	4.46
PM034/3-7	0.056 44	0.002 59	0.468 97	0.020 71	0.060 25	0.000 73	0.019 09	0.000 48	468.9		99.18		390.5	14.31	377.2	4.46
PM034/3-8	0.140 77	0.003 60	1.172 23	0.026 95	0.060 39	0.000 60	0.044 62	0.000 69	2 236.7		43.63		787.7	12.60	378.0	3.67
PM034/3-9	0.076 19	0.002 80	0.633 54	0.022 04	0.060 30	0.000 65	0.025 12	0.000 53	1 100.1		71.71		498.3	13.70	377.4	3.95
PM034/3-10	0.071 40	0.007 26	0.594 72	0.058 90	0.060 40	0.001 76	0.021 35	0.001 31	969.0		194.80		473.9	37.50	378.1	10.70
PM034/3-11	0.069 00	0.001 90	0.573 59	0.014 63	0.060 28	0.000 49	0.020 44	0.000 29	898.9		55.83		460.3	9.44	377.3	3.00
PM034/3-12	0.065 71	0.003 53	0.546 78	0.028 38	0.060 35	0.000 90	0.021 33	0.000 67	797.2		108.81		442.9	18.63	377.7	5.47
PM034/3-13	0.054 58	0.004 20	0.453 47	0.034 10	0.060 26	0.001 13	0.017 14	0.000 75	395.1		163.95		379.7	23.82	377.2	6.89
PM034/3-14	0.129 91	0.004 21	0.956 97	0.028 69	0.053 43	0.000 63	0.031 26	0.000 60	2 096.7		55.89		681.7	14.88	335.5	3.84
PM034/3-15	0.069 31	0.002 14	0.575 93	0.016 70	0.060 26	0.000 55	0.021 86	0.000 38	908.1		62.47		461.8	10.76	377.2	3.33
PM034/3-16	0.060 10	0.002 40	0.499 73	0.019 07	0.060 31	0.000 64	0.018 42	0.000 45	607.1		83.99		411.5	12.91	377.5	3.91
PM034/3-17	0.055 68	0.002 67	0.462 57	0.021 42	0.060 25	0.000 72	0.018 86	0.000 52	439.4		103.51		386.0	14.87	377.1	4.38
PM034/3-18	0.064 13	0.002 34	0.533 93	0.018 50	0.060 38	0.000 60	0.019 98	0.000 44	746.0		75.15		434.4	12.25	377.9	3.67

样品编号	SiO₂		TiO₂		Al₂O₃		Fe₂O₃		FeO			MnO		MgO		CaO		Na₂O		K₂O			P₂O₅		烧失量		总量		TFeO		TFeO/ MgO
PM031/6	76.41		0.18		12.1		0.41		0.78			0.03		0.32		0.95		3.08		4.24			0.02		1.24		99.76		1.15		3.59
PM026/6	75.75		0.17		12.03		1.07		0.17			0.03		0.44		1.19		3.47		4.44			0.02		1.01		99.77		1.13		2.57
PM031/10	75.43		0.23		13.07		0.55		0.92			0.05		0.41		1.07		3.74		3.66			0.03		0.69		99.85		1.41		3.45
PM031/11	73.53		0.19		12.47		0.54		0.91			0.06		0.45		1.90		3.49		3.99			0.03		2.20		99.76		1.40		3.10
D6533/1	72.55		0.34		13.66		0.57		1.62			0.06		0.71		1.59		3.60		4.05			0.06		0.91		99.72		2.13		3.00
PM034/3	74.03		0.21		13.6		0.54		1.26			0.04		0.27		0.42		4.41		4.18			0.02		0.72		99.70		1.75		6.47
样品编号	K₂O/ Na₂O		σ		SI		DI		A/CNK			A/NK		A/MF		C/MF		La		Ce			Pr		Nd		Sm		Eu		Gd
PM031/6	1.38		1.60		3.62		91.90		1.06			1.25		4.96		0.71		23.8		42.4			4.03		13.5		2.22		0.47		2.06
PM026/6	1.28		1.90		4.61		92.32		0.95			1.14		4.42		0.80		23.3		43.2			4.45		13.4		2.44		0.54		2.20
PM031/10	0.98		1.68		4.42		90.46		1.08			1.29		4.29		0.64		21.6		44.3			4.45		15.6		2.95		0.71		2.61
PM031/11	1.14		1.82		4.8		88.69		0.92			1.24		4.00		1.11		25.9		45.1			4.06		13.4		2.24		0.49		1.90
D6533/1	1.13		1.97		6.73		86.30		1.04			1.32		2.83		0.60		25.5		55.6			5.73		19.3		3.64		0.92		3.20
PM034/3	0.95		2.37		2.53		93.38		1.08			1.15		4.30		0.24		21.0		48.2			4.45		15.6		2.73		0.50		2.46
样品编号	Tb		Dy		Ho		Er		Tm			Yb		Lu		Y		REE		LREE			HREE		LREE/ HREE		(La/ Yb)_N		δEu		δCe
PM031/6	0.31		1.48		0.42		1.10		0.20			1.52		0.23		10.7		93.74		86.42			7.32		11.81		11.23		0.67		1.06
PM026/6	0.35		2.01		0.43		1.34		0.20			1.55		0.27		10.6		95.68		87.33			8.35		10.46		10.78		0.71		1.04
PM031/10	0.47		2.04		0.54		1.57		0.28			2.01		0.35		14.7		99.48		89.61			9.87		9.08		7.71		0.78		1.11
PM031/11	0.33		1.48		0.39		1.17		0.21			1.54		0.27		11.3		98.48		91.19			7.29		12.51		12.06		0.73		1.08
D6533/1	0.54		2.80		0.64		1.70		0.30			1.99		0.30		15.9		122.16		110.69			11.47		9.65		9.19		0.82		1.13
PM034/3	0.45		2.22		0.58		1.61		0.29			2.10		0.32		14.1		102.51		92.48			10.03		9.22		7.17		0.59		1.22
样品编号	Cu	Pb		Zn		Co		Ni		Cr	V		Ga		Sc		Sr		Ba		Rb	Nb		Ta		Zr		Hf		U		Th
PM031/6	35.0	20.2		20.4		1.36		2.49		10.7	13.6		15.3		2.5		89.4		320		207	12.2		8.57		102.0		3.09		2.53		28.4
PM026/6	14.0	19.5		13.3		2.06		3.03		5.0	10.5		13.0		2.0		126.0		336		137	13.3		5.23		74.1		2.96		2.71		41.8
PM031/10	5.6	19.7		29.6		2.18		2.99		8.1	12.7		14.8		3.2		125.0		280		183	19.8		2.58		117.0		3.75		2.48		38.6
PM031/11	6.8	14.8		24.2		2.08		3.78		6.2	14.0		14.7		5.6		105.0		212		189	11.1		5.59		89.8		3.41		2.68		31.0
D6533/1	6.9	18.9		31.1		3.88		4.25		8.1	22.0		15.1		4.6		193.0		430		161	14.0		7.02		130.0		2.53		2.03		29.0
PM034/3	9.8	17.3		32.1		2.00		3.22		4.8	10.2		16.8		2.9		96.3		589		175	15.3		2.04		195.0		4.79		2.41		33.6

样品编号	SiO₂		TiO₂		Al₂O₃		Fe₂O₃		FeO			MnO		MgO		CaO		Na₂O		K₂O			P₂O₅		烧失量		总量		TFeO		TFeO/ MgO
PM031/6	76.41		0.18		12.1		0.41		0.78			0.03		0.32		0.95		3.08		4.24			0.02		1.24		99.76		1.15		3.59
PM026/6	75.75		0.17		12.03		1.07		0.17			0.03		0.44		1.19		3.47		4.44			0.02		1.01		99.77		1.13		2.57
PM031/10	75.43		0.23		13.07		0.55		0.92			0.05		0.41		1.07		3.74		3.66			0.03		0.69		99.85		1.41		3.45
PM031/11	73.53		0.19		12.47		0.54		0.91			0.06		0.45		1.90		3.49		3.99			0.03		2.20		99.76		1.40		3.10
D6533/1	72.55		0.34		13.66		0.57		1.62			0.06		0.71		1.59		3.60		4.05			0.06		0.91		99.72		2.13		3.00
PM034/3	74.03		0.21		13.6		0.54		1.26			0.04		0.27		0.42		4.41		4.18			0.02		0.72		99.70		1.75		6.47
样品编号	K₂O/ Na₂O		σ		SI		DI		A/CNK			A/NK		A/MF		C/MF		La		Ce			Pr		Nd		Sm		Eu		Gd
PM031/6	1.38		1.60		3.62		91.90		1.06			1.25		4.96		0.71		23.8		42.4			4.03		13.5		2.22		0.47		2.06
PM026/6	1.28		1.90		4.61		92.32		0.95			1.14		4.42		0.80		23.3		43.2			4.45		13.4		2.44		0.54		2.20
PM031/10	0.98		1.68		4.42		90.46		1.08			1.29		4.29		0.64		21.6		44.3			4.45		15.6		2.95		0.71		2.61
PM031/11	1.14		1.82		4.8		88.69		0.92			1.24		4.00		1.11		25.9		45.1			4.06		13.4		2.24		0.49		1.90
D6533/1	1.13		1.97		6.73		86.30		1.04			1.32		2.83		0.60		25.5		55.6			5.73		19.3		3.64		0.92		3.20
PM034/3	0.95		2.37		2.53		93.38		1.08			1.15		4.30		0.24		21.0		48.2			4.45		15.6		2.73		0.50		2.46
样品编号	Tb		Dy		Ho		Er		Tm			Yb		Lu		Y		REE		LREE			HREE		LREE/ HREE		(La/ Yb)_N		δEu		δCe
PM031/6	0.31		1.48		0.42		1.10		0.20			1.52		0.23		10.7		93.74		86.42			7.32		11.81		11.23		0.67		1.06
PM026/6	0.35		2.01		0.43		1.34		0.20			1.55		0.27		10.6		95.68		87.33			8.35		10.46		10.78		0.71		1.04
PM031/10	0.47		2.04		0.54		1.57		0.28			2.01		0.35		14.7		99.48		89.61			9.87		9.08		7.71		0.78		1.11
PM031/11	0.33		1.48		0.39		1.17		0.21			1.54		0.27		11.3		98.48		91.19			7.29		12.51		12.06		0.73		1.08
D6533/1	0.54		2.80		0.64		1.70		0.30			1.99		0.30		15.9		122.16		110.69			11.47		9.65		9.19		0.82		1.13
PM034/3	0.45		2.22		0.58		1.61		0.29			2.10		0.32		14.1		102.51		92.48			10.03		9.22		7.17		0.59		1.22
样品编号	Cu	Pb		Zn		Co		Ni		Cr	V		Ga		Sc		Sr		Ba		Rb	Nb		Ta		Zr		Hf		U		Th
PM031/6	35.0	20.2		20.4		1.36		2.49		10.7	13.6		15.3		2.5		89.4		320		207	12.2		8.57		102.0		3.09		2.53		28.4
PM026/6	14.0	19.5		13.3		2.06		3.03		5.0	10.5		13.0		2.0		126.0		336		137	13.3		5.23		74.1		2.96		2.71		41.8
PM031/10	5.6	19.7		29.6		2.18		2.99		8.1	12.7		14.8		3.2		125.0		280		183	19.8		2.58		117.0		3.75		2.48		38.6
PM031/11	6.8	14.8		24.2		2.08		3.78		6.2	14.0		14.7		5.6		105.0		212		189	11.1		5.59		89.8		3.41		2.68		31.0
D6533/1	6.9	18.9		31.1		3.88		4.25		8.1	22.0		15.1		4.6		193.0		430		161	14.0		7.02		130.0		2.53		2.03		29.0
PM034/3	9.8	17.3		32.1		2.00		3.22		4.8	10.2		16.8		2.9		96.3		589		175	15.3		2.04		195.0		4.79		2.41		33.6

样品号	Al₂O₃/%	CaO/%	K₂O/%	Na₂O/%	SiO₂/%	Zr/10^-6	lnD_Zr	M	t_Zr/℃
PM031/6	12.10	0.95	4.24	3.08	76.41	102.00	8.49	0.75	797
PM026/6	12.03	1.19	4.44	3.47	75.75	74.10	8.81	0.85	763
PM031/10	13.07	1.07	3.66	3.74	75.43	117.00	8.35	0.74	810
PM031/11	12.47	1.90	3.99	3.49	73.53	89.80	8.62	0.90	775
D6533/1	13.66	1.59	4.05	3.60	72.55	130.00	8.25	0.81	815
PM034/3	13.60	0.42	4.18	4.41	74.03	195.00	7.84	0.76	857