Zircon U-Pb geochronology and Hf isotopic compositions of igneous rocks from the Shuikoushan Pb-Zn deposit, Hunan Province, and their geological significance

doi:10.13745/j.esf.sf.2020.3.25

Abstract

Abstract:

The Shuikoushan Pb-Zn polymetallic ore-field is an important nonferrous and precious metal-producing area in Nanling, China. Many intermediate-acidic igneous rocks occur in this area, and studying their geological and geochemical characteristics is critical for clarifying their diagenetic magmatic-metallogenic evolution and guiding ore exploration. The Laoyachao No. 4 and Yagongtang No. 3 grano-diorites have similar major and trace elemental compositions and have metaluminous and high-K calc-alkaline characteristics of shoshonitic series. The rocks display generally flat, right-dipping rare earth element patterns with enriched light rare earth elements, relatively flat high rare earth element patterns, and slightly negative Eu anomalies. Zircon laser ablation inductively coupled plasma mass spectrometry U-Pb dating showed that the Laoyachao granodiorite formed at 162.9±0.7 Ma, and the Yagongtang granodiorite intruded at 156.3±0.6 Ma. This suggests that igneous rocks in the Shuikoushan ore field mainly formed during the early Yanshanian and underwent multiple emplacement stages. In situ Hf isotope analyses revealed ε_Hf(t) values ranging from -11.2 to -8.24 and two-stage Hf model ages (T_DM2) of 1920-1734 Ma for the Laoyachao granodiorite as well as ε_Hf(t) values of -13.51 to -6.23 and T_DM2 ages of 2063-1601 Ma for the Yagongtang granodiorite. This showed that more mantle material was added to the Yagongtang magma. Based on geochemical compositions and previous studies of the Xianrenyan monzonite in the study area, we argue that the Laoyachao and Yagongtang granodiorites were mainly derived from the partial melting of basaltic rocks in the Mesoproterozoic lower crust. From 165 to 155 Ma, the Shuikoushan ore field was in an extensional-thinning setting, and the ε_Hf(t) values of igneous rocks increased rapidly, indicating enhanced underplating of mantle magmas. Mineralization ages of the Shuikoushan Pb-Zn deposits were coeval with the formation of the Yagongtang and Xianrenyan plutons, indicating genetic relationships. Co-contribution of crustal and mantle ore-forming metals was critical to the formation of numerous Cu-Pb-Zn-Au deposits in the Shuikoushan area ore field.

Key words: Shuikoushan ore-field, granodiorite, zircon U-Pb geochronology, Hf isotope, geological significance

CLC Number:

LI Yongsheng, ZHEN Shimin, YU Xiaofei, GONG Fanying, DU Zezhong. Zircon U-Pb geochronology and Hf isotopic compositions of igneous rocks from the Shuikoushan Pb-Zn deposit, Hunan Province, and their geological significance[J]. Earth Science Frontiers, 2020, 27(2): 332-352.

Figures/Tables 15

References 91

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测点编号	元素含量/10^-6			同位素比值							年龄/Ma
测点编号	²⁰⁶Pb	²³²Th	²³⁸U	²³²Th/²³⁸U	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ
SKC-5-1	5.63	120.87	231.98	0.52	0.047 1	0.00	0.172 5	0.00	0.025 4	0.00	52.0	13.0	162.0	2.0	162.0	1.0
SKC-5-2	4.73	93.88	190.15	0.49	0.046 9	0.00	0.174 3	0.00	0.025 8	0.00	44.0	14.0	163.0	2.0	164.2	1.0
SKC-5-3	6.53	98.23	265.51	0.37	0.047 6	0.00	0.173 5	0.00	0.025 3	0.00	77.0	12.0	162.0	1.0	161.2	0.9
SKC-5-4	3.71	84.78	150.46	0.56	0.047 0	0.00	0.172 4	0.00	0.025 5	0.00	50.0	14.0	162.0	2.0	162.0	1.0
SKC-5-6	5.03	106.68	205.31	0.52	0.046 9	0.00	0.170 5	0.00	0.025 2	0.00	46.0	12.0	160.0	1.0	160.5	1.0
SKC-5-7	5.14	93.99	207.28	0.45	0.047 1	0.00	0.172 8	0.00	0.025 5	0.00	56.0	12.0	162.0	2.0	162.0	1.0
SKC-5-8	3.59	70.20	145.59	0.48	0.049 2	0.00	0.180 3	0.00	0.025 4	0.00	157.0	21.0	168.0	2.0	162.0	1.0
SKC-5-9	8.05	132.21	325.67	0.41	0.048 0	0.00	0.175 5	0.00	0.025 4	0.00	100.0	14.0	164.0	2.0	162.0	1.0
SKC-5-10	4.84	127.53	200.27	0.64	0.049 5	0.00	0.181 2	0.00	0.025 4	0.00	171.0	16.0	169.0	2.0	162.0	2.0
SKC-5-11	6.80	139.53	273.60	0.51	0.047 9	0.00	0.172 9	0.00	0.025 8	0.00	93.0	12.0	162.0	2.0	164.0	2.0
SKC-5-12	5.56	117.00	224.15	0.52	0.047 1	0.00	0.169 3	0.00	0.025 7	0.00	56.0	15.0	159.0	2.0	163.0	1.0
SKC-5-13	6.68	183.19	269.70	0.68	0.048 0	0.00	0.174 6	0.00	0.026 0	0.00	98.0	15.0	163.0	2.0	165.0	2.0
SKC-5-14	7.30	198.29	295.68	0.67	0.049 3	0.00	0.176 0	0.00	0.025 5	0.00	161.0	12.0	165.0	2.0	163.0	1.0
SKC-5-15	7.04	166.20	280.12	0.59	0.048 2	0.00	0.175 4	0.00	0.026 0	0.00	110.0	12.0	164.0	2.0	165.0	1.0
SKC-5-16	6.36	140.55	253.76	0.55	0.047 7	0.00	0.173 0	0.00	0.026 0	0.00	82.0	12.0	162.0	2.0	165.0	1.0
SKC-5-17	6.11	137.03	248.71	0.55	0.047 7	0.00	0.171 1	0.00	0.025 6	0.00	86.0	11.0	160.0	1.0	163.0	1.0
SKC-5-18	8.64	168.49	347.55	0.48	0.047 4	0.00	0.169 9	0.00	0.025 6	0.00	69.0	11.0	159.0	1.0	163.0	1.0
SKC-5-19	5.98	158.51	237.47	0.67	0.047 3	0.00	0.171 6	0.00	0.025 9	0.00	65.0	14.0	161.0	2.0	165.0	1.0
SKC-4-1	8.26	362.00	346.85	1.04	0.047 7	0.00	0.173 5	0.00	0.024 9	0.00	84.0	10.0	162.0	1.0	158.5	1.0
SKC-4-2	6.45	181.83	280.59	0.65	0.047 9	0.00	0.169 7	0.00	0.024 2	0.00	93.0	11.0	159.0	1.0	154.4	0.9
SKC-4-3	6.05	137.12	258.10	0.53	0.046 7	0.00	0.169 6	0.00	0.024 8	0.00	36.0	10.0	159.0	1.0	158.0	1.0
SKC-4-4	4.89	146.97	208.03	0.71	0.047 9	0.00	0.173 7	0.00	0.024 7	0.00	93.0	24.0	163.0	2.0	158.0	1.0
SKC-4-5	6.66	111.07	283.48	0.39	0.047 0	0.00	0.170 2	0.00	0.024 7	0.00	51.0	12.0	160.0	2.0	158.0	1.0
SKC-4-6	4.57	126.63	195.96	0.65	0.047 4	0.00	0.170 3	0.00	0.024 6	0.00	72.0	13.0	160.0	2.0	156.0	1.0
SKC-4-7	4.09	93.62	175.43	0.53	0.046 7	0.00	0.168 7	0.00	0.024 7	0.00	32.0	13.0	158.0	2.0	157.0	1.0
SKC-4-8	7.54	137.37	327.21	0.42	0.047 7	0.00	0.169 7	0.00	0.024 4	0.00	84.0	9.0	159.0	1.0	155.0	1.0
SKC-4-9	3.48	85.91	150.59	0.57	0.047 3	0.00	0.169 6	0.00	0.024 6	0.00	62.0	14.0	159.0	2.0	156.0	1.0
SKC-4-10	6.25	121.29	271.77	0.45	0.047 7	0.00	0.169 2	0.00	0.024 7	0.00	86.0	13.0	159.0	1.0	157.5	1.0
SKC-4-11	7.67	183.40	327.68	0.56	0.047 5	0.00	0.177 0	0.00	0.024 8	0.00	73.0	9.0	166.0	1.0	158.0	1.0
SKC-4-12	5.05	80.55	213.60	0.38	0.047 0	0.00	0.175 0	0.00	0.024 7	0.00	51.0	11.0	164.0	1.0	157.4	1.0
SKC-4-13	4.91	84.25	209.23	0.40	0.047 5	0.00	0.177 8	0.00	0.024 9	0.00	74.0	11.0	166.0	1.0	158.0	1.0
测点编号	元素含量/10^-6			同位素比值							年龄/Ma
测点编号	²⁰⁶Pb	²³²Th	²³⁸U	²³²Th/²³⁸U	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ
SKC-4-14	9.18	239.73	397.65	0.60	0.047 3	0.00	0.173 1	0.00	0.024 3	0.00	65.0	9.0	162.0	1.0	155.0	1.0
SKC-4-15	5.18	93.07	224.58	0.41	0.048 5	0.00	0.182 9	0.01	0.024 6	0.00	126.0	98.0	171.0	8.0	157.0	1.0
SKC-4-16	3.66	91.03	158.86	0.57	0.047 4	0.00	0.171 7	0.00	0.024 1	0.00	70.0	12.0	161.0	1.0	153.4	0.9
SKC-4-17	5.50	149.79	240.87	0.62	0.047 2	0.00	0.171 0	0.00	0.024 1	0.00	59.0	11.0	160.0	1.0	153.3	0.9
SKC-4-20	4.94	127.20	207.89	0.61	0.047 6	0.00	0.178 5	0.00	0.024 9	0.00	81.0	11.0	167.0	2.0	159.0	1.0
SKC-4-21	5.71	178.30	244.08	0.73	0.047 1	0.00	0.169 0	0.00	0.024 6	0.00	52.0	10.0	159.0	1.0	156.5	0.9
SKC-4-22	3.64	104.32	156.36	0.67	0.046 7	0.00	0.159 7	0.00	0.024 6	0.00	35.0	15.0	150.0	2.0	157.0	1.0
SKC-4-23	5.16	152.47	223.85	0.68	0.047 1	0.00	0.160 1	0.00	0.024 4	0.00	56.0	13.0	151.0	1.0	155.0	1.0
SKC-4-24	8.56	317.81	363.86	0.87	0.046 6	0.00	0.160 0	0.00	0.024 7	0.00	31.0	10.0	151.0	1.0	157.0	0.9
SKC-4-25	4.39	74.40	189.10	0.39	0.047 7	0.00	0.162 8	0.00	0.024 5	0.00	82.0	15.0	153.0	2.0	156.0	1.0
SKC-4-26	4.68	82.39	202.70	0.41	0.047 4	0.00	0.163 0	0.00	0.024 7	0.00	71.0	13.0	153.0	2.0	157.0	1.0
SKC-4-27	4.31	82.38	187.82	0.44	0.047 2	0.00	0.159 9	0.00	0.024 4	0.00	62.0	12.0	151.0	1.0	155.0	1.0
SKC-4-28	3.61	112.13	157.55	0.71	0.047 5	0.00	0.162 0	0.00	0.024 5	0.00	74.0	17.0	152.0	2.0	156.0	1.0
SKC-4-29	7.76	211.75	344.34	0.61	0.047 1	0.00	0.157 7	0.00	0.024 0	0.00	56.0	13.0	149.0	1.0	153.0	1.0
SKC-4-30	4.72	94.25	201.64	0.47	0.046 7	0.00	0.160 4	0.00	0.024 7	0.00	32.0	13.0	151.0	2.0	157.0	1.0

测点编号	元素含量/10^-6			同位素比值							年龄/Ma
测点编号	²⁰⁶Pb	²³²Th	²³⁸U	²³²Th/²³⁸U	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ
SKC-5-1	5.63	120.87	231.98	0.52	0.047 1	0.00	0.172 5	0.00	0.025 4	0.00	52.0	13.0	162.0	2.0	162.0	1.0
SKC-5-2	4.73	93.88	190.15	0.49	0.046 9	0.00	0.174 3	0.00	0.025 8	0.00	44.0	14.0	163.0	2.0	164.2	1.0
SKC-5-3	6.53	98.23	265.51	0.37	0.047 6	0.00	0.173 5	0.00	0.025 3	0.00	77.0	12.0	162.0	1.0	161.2	0.9
SKC-5-4	3.71	84.78	150.46	0.56	0.047 0	0.00	0.172 4	0.00	0.025 5	0.00	50.0	14.0	162.0	2.0	162.0	1.0
SKC-5-6	5.03	106.68	205.31	0.52	0.046 9	0.00	0.170 5	0.00	0.025 2	0.00	46.0	12.0	160.0	1.0	160.5	1.0
SKC-5-7	5.14	93.99	207.28	0.45	0.047 1	0.00	0.172 8	0.00	0.025 5	0.00	56.0	12.0	162.0	2.0	162.0	1.0
SKC-5-8	3.59	70.20	145.59	0.48	0.049 2	0.00	0.180 3	0.00	0.025 4	0.00	157.0	21.0	168.0	2.0	162.0	1.0
SKC-5-9	8.05	132.21	325.67	0.41	0.048 0	0.00	0.175 5	0.00	0.025 4	0.00	100.0	14.0	164.0	2.0	162.0	1.0
SKC-5-10	4.84	127.53	200.27	0.64	0.049 5	0.00	0.181 2	0.00	0.025 4	0.00	171.0	16.0	169.0	2.0	162.0	2.0
SKC-5-11	6.80	139.53	273.60	0.51	0.047 9	0.00	0.172 9	0.00	0.025 8	0.00	93.0	12.0	162.0	2.0	164.0	2.0
SKC-5-12	5.56	117.00	224.15	0.52	0.047 1	0.00	0.169 3	0.00	0.025 7	0.00	56.0	15.0	159.0	2.0	163.0	1.0
SKC-5-13	6.68	183.19	269.70	0.68	0.048 0	0.00	0.174 6	0.00	0.026 0	0.00	98.0	15.0	163.0	2.0	165.0	2.0
SKC-5-14	7.30	198.29	295.68	0.67	0.049 3	0.00	0.176 0	0.00	0.025 5	0.00	161.0	12.0	165.0	2.0	163.0	1.0
SKC-5-15	7.04	166.20	280.12	0.59	0.048 2	0.00	0.175 4	0.00	0.026 0	0.00	110.0	12.0	164.0	2.0	165.0	1.0
SKC-5-16	6.36	140.55	253.76	0.55	0.047 7	0.00	0.173 0	0.00	0.026 0	0.00	82.0	12.0	162.0	2.0	165.0	1.0
SKC-5-17	6.11	137.03	248.71	0.55	0.047 7	0.00	0.171 1	0.00	0.025 6	0.00	86.0	11.0	160.0	1.0	163.0	1.0
SKC-5-18	8.64	168.49	347.55	0.48	0.047 4	0.00	0.169 9	0.00	0.025 6	0.00	69.0	11.0	159.0	1.0	163.0	1.0
SKC-5-19	5.98	158.51	237.47	0.67	0.047 3	0.00	0.171 6	0.00	0.025 9	0.00	65.0	14.0	161.0	2.0	165.0	1.0
SKC-4-1	8.26	362.00	346.85	1.04	0.047 7	0.00	0.173 5	0.00	0.024 9	0.00	84.0	10.0	162.0	1.0	158.5	1.0
SKC-4-2	6.45	181.83	280.59	0.65	0.047 9	0.00	0.169 7	0.00	0.024 2	0.00	93.0	11.0	159.0	1.0	154.4	0.9
SKC-4-3	6.05	137.12	258.10	0.53	0.046 7	0.00	0.169 6	0.00	0.024 8	0.00	36.0	10.0	159.0	1.0	158.0	1.0
SKC-4-4	4.89	146.97	208.03	0.71	0.047 9	0.00	0.173 7	0.00	0.024 7	0.00	93.0	24.0	163.0	2.0	158.0	1.0
SKC-4-5	6.66	111.07	283.48	0.39	0.047 0	0.00	0.170 2	0.00	0.024 7	0.00	51.0	12.0	160.0	2.0	158.0	1.0
SKC-4-6	4.57	126.63	195.96	0.65	0.047 4	0.00	0.170 3	0.00	0.024 6	0.00	72.0	13.0	160.0	2.0	156.0	1.0
SKC-4-7	4.09	93.62	175.43	0.53	0.046 7	0.00	0.168 7	0.00	0.024 7	0.00	32.0	13.0	158.0	2.0	157.0	1.0
SKC-4-8	7.54	137.37	327.21	0.42	0.047 7	0.00	0.169 7	0.00	0.024 4	0.00	84.0	9.0	159.0	1.0	155.0	1.0
SKC-4-9	3.48	85.91	150.59	0.57	0.047 3	0.00	0.169 6	0.00	0.024 6	0.00	62.0	14.0	159.0	2.0	156.0	1.0
SKC-4-10	6.25	121.29	271.77	0.45	0.047 7	0.00	0.169 2	0.00	0.024 7	0.00	86.0	13.0	159.0	1.0	157.5	1.0
SKC-4-11	7.67	183.40	327.68	0.56	0.047 5	0.00	0.177 0	0.00	0.024 8	0.00	73.0	9.0	166.0	1.0	158.0	1.0
SKC-4-12	5.05	80.55	213.60	0.38	0.047 0	0.00	0.175 0	0.00	0.024 7	0.00	51.0	11.0	164.0	1.0	157.4	1.0
SKC-4-13	4.91	84.25	209.23	0.40	0.047 5	0.00	0.177 8	0.00	0.024 9	0.00	74.0	11.0	166.0	1.0	158.0	1.0
测点编号	元素含量/10^-6			同位素比值							年龄/Ma
测点编号	²⁰⁶Pb	²³²Th	²³⁸U	²³²Th/²³⁸U	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ
SKC-4-14	9.18	239.73	397.65	0.60	0.047 3	0.00	0.173 1	0.00	0.024 3	0.00	65.0	9.0	162.0	1.0	155.0	1.0
SKC-4-15	5.18	93.07	224.58	0.41	0.048 5	0.00	0.182 9	0.01	0.024 6	0.00	126.0	98.0	171.0	8.0	157.0	1.0
SKC-4-16	3.66	91.03	158.86	0.57	0.047 4	0.00	0.171 7	0.00	0.024 1	0.00	70.0	12.0	161.0	1.0	153.4	0.9
SKC-4-17	5.50	149.79	240.87	0.62	0.047 2	0.00	0.171 0	0.00	0.024 1	0.00	59.0	11.0	160.0	1.0	153.3	0.9
SKC-4-20	4.94	127.20	207.89	0.61	0.047 6	0.00	0.178 5	0.00	0.024 9	0.00	81.0	11.0	167.0	2.0	159.0	1.0
SKC-4-21	5.71	178.30	244.08	0.73	0.047 1	0.00	0.169 0	0.00	0.024 6	0.00	52.0	10.0	159.0	1.0	156.5	0.9
SKC-4-22	3.64	104.32	156.36	0.67	0.046 7	0.00	0.159 7	0.00	0.024 6	0.00	35.0	15.0	150.0	2.0	157.0	1.0
SKC-4-23	5.16	152.47	223.85	0.68	0.047 1	0.00	0.160 1	0.00	0.024 4	0.00	56.0	13.0	151.0	1.0	155.0	1.0
SKC-4-24	8.56	317.81	363.86	0.87	0.046 6	0.00	0.160 0	0.00	0.024 7	0.00	31.0	10.0	151.0	1.0	157.0	0.9
SKC-4-25	4.39	74.40	189.10	0.39	0.047 7	0.00	0.162 8	0.00	0.024 5	0.00	82.0	15.0	153.0	2.0	156.0	1.0
SKC-4-26	4.68	82.39	202.70	0.41	0.047 4	0.00	0.163 0	0.00	0.024 7	0.00	71.0	13.0	153.0	2.0	157.0	1.0
SKC-4-27	4.31	82.38	187.82	0.44	0.047 2	0.00	0.159 9	0.00	0.024 4	0.00	62.0	12.0	151.0	1.0	155.0	1.0
SKC-4-28	3.61	112.13	157.55	0.71	0.047 5	0.00	0.162 0	0.00	0.024 5	0.00	74.0	17.0	152.0	2.0	156.0	1.0
SKC-4-29	7.76	211.75	344.34	0.61	0.047 1	0.00	0.157 7	0.00	0.024 0	0.00	56.0	13.0	149.0	1.0	153.0	1.0
SKC-4-30	4.72	94.25	201.64	0.47	0.046 7	0.00	0.160 4	0.00	0.024 7	0.00	32.0	13.0	151.0	2.0	157.0	1.0

成分			老鸭巢花岗闪长岩
成分			SKC2-3			SKC2-4		SKC2-5	SKC2-6			SKC2-7			SKC2-8			SKC2-9			SKC2-10			SKC-B5			SKC-B4			喻亨祥-1			喻亨祥-2			喻亨祥-3					喻亨祥-4			喻亨祥-5
SiO₂			55.44			59.45		57.56	55.17			51.79			60.39			53.10			50.11			58.91			60.21			59.52			55.61			51.34					57.01			59.31
Al₂O₃			17.63			16.60		15.63	19.51			14.96			16.57			17.84			12.62			13.93			19.84			14.29			14.65			14.25					14.69			15.10
Fe₂O_3T			3.56			6.36		4.81	3.72			4.58			5.45			4.89			5.88			7.89			3.55			1.66			3.27			3.57					2.66			3.68
MgO			3.13			2.85		1.28	1.32			1.32			1.88			1.35			1.26			1.91			0.48			1.72			2.43			2.43					2.58			2.25
CaO			6.40			4.03		6.55	4.60			8.76			3.42			9.16			15.58			6.34			5.88			5.54			6.83			10.59					5.37			3.88
Na₂O			1.08			2.57		2.72	0.51			1.50			2.18			0.19			0.20			0.12			0.07			2.09			2.12			3.49					4.24			3.26
K₂O			4.67			2.21		4.96	7.02			7.77			4.73			3.53			1.96			2.72			1.25			2.67			3.70			1.57					1.93			3.06
MnO			0.09			0.08		0.13	0.07			0.14			0.07			0.12			0.18			0.25			0.07			0.09			0.14			0.23					0.11			0.08
TiO₂			0.68			0.86		0.80	0.86			0.72			0.81			0.72			0.41			0.31			0.66			0.50			0.64			0.64					0.62			0.51
P₂O₅			0.34			0.41		0.37	0.35			0.34			0.37			0.29			0.14			0.13			0.33			0.28			0.22			0.19					0.20			0.30
烧失量			6.91			4.30		5.13	6.63			7.84			4.05			8.79			11.16			7.23			7.35			6.68			6.69			8.28					6.26			5.21
成分		老鸭巢花岗闪长岩																														鸭公塘花岗闪长岩
成分		SKC2-3			SKC2-4			SKC2-5			SKC2-6			SKC2-7			SKC2-8			SKC2-9			SKC2-10			SKC-B5			SKC-B4						喻亨祥-1			喻亨祥-2		喻亨祥-3			喻亨祥-4		喻亨祥-5
Li		32.6			23.5			15.7			9.97			11.9			22.5			37.1			31.2			133			92.8
Be		2.39			2.26			1.29			2.32			1.97			2.07			2.22			1.33			2			1.66
Sc		15.4			16.4			17.8			20.7			19.2			19.2			18.3			12.3			5.44			17.4
V		117			134			145			162			162			135			137			85.2			56			126
Cr		105			150			133			155			97.9			203			203			179			13.3			32.6
Co		15.5			13			12			12.8			12			16.3			16.3			15.4			5.07			9.94
Ni		8.74			11.8			15.3			19.7			11.8			12.8			11.5			16			7.15			7.98
Cu		33.2			37.5			53.4			48.2			59.8			139			48.3			174			78.5			203
Zn		61			96.8			688			857			278			603			1 604			3 326			288			87.1
Ga		17.6			17.9			16.9			21.5			18.7			18.6			19.3			12.3			18.5			20.3
Rb		173			97.8			185			240			258			173			209			66.2			106			47.1
Sr		205			246			217			152			451			247			46.5			50.7			40.6			27.3
Y		26.4			17			20			17.9			33.6			22.5			22.8			21.3			16			22.6
Nb		13.4			14.7			14.3			15.7			14.1			15			13.8			10.3			11.2			14.6
Mo		2.26			1.94			3.24			3.54			3.28			3.49			3.55			18.3			15.9			37
Cd		0.237			0.086			1.91			2.68			0.55			0.651			6.84			13.8			0.554			0.225
In		0.117			0.064			0.148			0.473			0.077			0.052			0.145			1.83			0.247			0.053
Sb		4.88			2.68			7.7			6.07			25.5			18.6			5.9			30			18.7			3.66
Cs		32.3			14.3			7.88			17.9			15.7			15.8			14.8			11.7			13.7			9.73
Ba		546			241			542			591			1202			611			45.5			44.9			30.5			78.5
La		41.5			34.9			41.1			36.9			46			44.4			66.9			35.6			35.2			40
Ce		79.3			64.5			76.9			69.7			86.4			83.1			124			67.3			53.4			77.2
Pr		9.51			7.23			8.86			8.09			10.3			9.76			14.6			7.72			5.78			9.1
Nd		37.7			27.6			34			30			40.7			37			58			29.3			19.7			34.9
Sm		7.2			5.15			6.39			5.35			7.91			6.74			9.95			5.4			3.51			6.57
Eu		1.82			1.73			1.43			1.09			2.18			1.69			2.54			1.4			1.06			1.41
Gd		6.19			4.23			5.08			4.63			6.92			5.43			7.42			4.74			3.23			5.75
Tb		1.01			0.68			0.795			0.721			1.16			0.866			1.05			0.749			0.54			0.976
Dy		5.47			3.85			4.13			3.73			6.41			4.91			5.33			4.36			3.24			4.89
Ho		0.948			0.64			0.762			0.646			1.21			0.82			0.888			0.786			0.588			0.882
Er		2.81			1.95			2.37			2.02			3.6			2.56			2.46			2.37			1.83			2.56
Tm		0.483			0.302			0.364			0.299			0.588			0.395			0.372			0.383			0.295			0.422
Yb		3.21			1.92			2.52			2.03			4.12			2.44			2.46			2.93			1.79			2.49
Lu		0.475			0.272			0.375			0.311			0.607			0.408			0.373			0.423			0.294			0.385
成分	老鸭巢花岗闪长岩																														鸭公塘花岗闪长岩
成分	SKC2-3			SKC2-4			SKC2-5			SKC2-6			SKC2-7			SKC2-8			SKC2-9			SKC2-10			SKC-B5			SKC-B4						喻亨祥-1			喻亨祥-2		喻亨祥-3			喻亨祥-4				喻亨祥-5
Ta	1.21			1.17			1.18			1.21			1.27			1.25			1.06			1.28			1.22			1.15
W	7.8			9.65			11.8			19.7			7.28			15.8			27.5			20.3			56.5			5.73
Re	0.017			0.022			0.02			0.038			0.015			0.026			0.038			0.052			0.011			0.015
Tl	1.36			0.738			0.889			1.45			0.876			0.764			1.62			0.686
Pb	23.8			12.4			29.4			145			47.6			21.9			246			710			37.4			34.2
Bi	1.18			0.601			1			1.16			0.657			0.553			2.5			62.7
Th	12.6			16.8			18.2			15.6			20.2			16.5			12.2			18.4			26.3			15
U	2.81			3.43			3.84			14.8			4.13			3.61			4.98			4.24			2.04			1.99
Zr	120			94.9			98.3			93.2			126			96.7			92.1			117			104			80.8
Hf	6.03			4.38			5.03			4.32			5.35			4.2			4.14			5.27			3.58			2.66

成分			老鸭巢花岗闪长岩
成分			SKC2-3			SKC2-4		SKC2-5	SKC2-6			SKC2-7			SKC2-8			SKC2-9			SKC2-10			SKC-B5			SKC-B4			喻亨祥-1			喻亨祥-2			喻亨祥-3					喻亨祥-4			喻亨祥-5
SiO₂			55.44			59.45		57.56	55.17			51.79			60.39			53.10			50.11			58.91			60.21			59.52			55.61			51.34					57.01			59.31
Al₂O₃			17.63			16.60		15.63	19.51			14.96			16.57			17.84			12.62			13.93			19.84			14.29			14.65			14.25					14.69			15.10
Fe₂O_3T			3.56			6.36		4.81	3.72			4.58			5.45			4.89			5.88			7.89			3.55			1.66			3.27			3.57					2.66			3.68
MgO			3.13			2.85		1.28	1.32			1.32			1.88			1.35			1.26			1.91			0.48			1.72			2.43			2.43					2.58			2.25
CaO			6.40			4.03		6.55	4.60			8.76			3.42			9.16			15.58			6.34			5.88			5.54			6.83			10.59					5.37			3.88
Na₂O			1.08			2.57		2.72	0.51			1.50			2.18			0.19			0.20			0.12			0.07			2.09			2.12			3.49					4.24			3.26
K₂O			4.67			2.21		4.96	7.02			7.77			4.73			3.53			1.96			2.72			1.25			2.67			3.70			1.57					1.93			3.06
MnO			0.09			0.08		0.13	0.07			0.14			0.07			0.12			0.18			0.25			0.07			0.09			0.14			0.23					0.11			0.08
TiO₂			0.68			0.86		0.80	0.86			0.72			0.81			0.72			0.41			0.31			0.66			0.50			0.64			0.64					0.62			0.51
P₂O₅			0.34			0.41		0.37	0.35			0.34			0.37			0.29			0.14			0.13			0.33			0.28			0.22			0.19					0.20			0.30
烧失量			6.91			4.30		5.13	6.63			7.84			4.05			8.79			11.16			7.23			7.35			6.68			6.69			8.28					6.26			5.21
成分		老鸭巢花岗闪长岩																														鸭公塘花岗闪长岩
成分		SKC2-3			SKC2-4			SKC2-5			SKC2-6			SKC2-7			SKC2-8			SKC2-9			SKC2-10			SKC-B5			SKC-B4						喻亨祥-1			喻亨祥-2		喻亨祥-3			喻亨祥-4		喻亨祥-5
Li		32.6			23.5			15.7			9.97			11.9			22.5			37.1			31.2			133			92.8
Be		2.39			2.26			1.29			2.32			1.97			2.07			2.22			1.33			2			1.66
Sc		15.4			16.4			17.8			20.7			19.2			19.2			18.3			12.3			5.44			17.4
V		117			134			145			162			162			135			137			85.2			56			126
Cr		105			150			133			155			97.9			203			203			179			13.3			32.6
Co		15.5			13			12			12.8			12			16.3			16.3			15.4			5.07			9.94
Ni		8.74			11.8			15.3			19.7			11.8			12.8			11.5			16			7.15			7.98
Cu		33.2			37.5			53.4			48.2			59.8			139			48.3			174			78.5			203
Zn		61			96.8			688			857			278			603			1 604			3 326			288			87.1
Ga		17.6			17.9			16.9			21.5			18.7			18.6			19.3			12.3			18.5			20.3
Rb		173			97.8			185			240			258			173			209			66.2			106			47.1
Sr		205			246			217			152			451			247			46.5			50.7			40.6			27.3
Y		26.4			17			20			17.9			33.6			22.5			22.8			21.3			16			22.6
Nb		13.4			14.7			14.3			15.7			14.1			15			13.8			10.3			11.2			14.6
Mo		2.26			1.94			3.24			3.54			3.28			3.49			3.55			18.3			15.9			37
Cd		0.237			0.086			1.91			2.68			0.55			0.651			6.84			13.8			0.554			0.225
In		0.117			0.064			0.148			0.473			0.077			0.052			0.145			1.83			0.247			0.053
Sb		4.88			2.68			7.7			6.07			25.5			18.6			5.9			30			18.7			3.66
Cs		32.3			14.3			7.88			17.9			15.7			15.8			14.8			11.7			13.7			9.73
Ba		546			241			542			591			1202			611			45.5			44.9			30.5			78.5
La		41.5			34.9			41.1			36.9			46			44.4			66.9			35.6			35.2			40
Ce		79.3			64.5			76.9			69.7			86.4			83.1			124			67.3			53.4			77.2
Pr		9.51			7.23			8.86			8.09			10.3			9.76			14.6			7.72			5.78			9.1
Nd		37.7			27.6			34			30			40.7			37			58			29.3			19.7			34.9
Sm		7.2			5.15			6.39			5.35			7.91			6.74			9.95			5.4			3.51			6.57
Eu		1.82			1.73			1.43			1.09			2.18			1.69			2.54			1.4			1.06			1.41
Gd		6.19			4.23			5.08			4.63			6.92			5.43			7.42			4.74			3.23			5.75
Tb		1.01			0.68			0.795			0.721			1.16			0.866			1.05			0.749			0.54			0.976
Dy		5.47			3.85			4.13			3.73			6.41			4.91			5.33			4.36			3.24			4.89
Ho		0.948			0.64			0.762			0.646			1.21			0.82			0.888			0.786			0.588			0.882
Er		2.81			1.95			2.37			2.02			3.6			2.56			2.46			2.37			1.83			2.56
Tm		0.483			0.302			0.364			0.299			0.588			0.395			0.372			0.383			0.295			0.422
Yb		3.21			1.92			2.52			2.03			4.12			2.44			2.46			2.93			1.79			2.49
Lu		0.475			0.272			0.375			0.311			0.607			0.408			0.373			0.423			0.294			0.385
成分	老鸭巢花岗闪长岩																														鸭公塘花岗闪长岩
成分	SKC2-3			SKC2-4			SKC2-5			SKC2-6			SKC2-7			SKC2-8			SKC2-9			SKC2-10			SKC-B5			SKC-B4						喻亨祥-1			喻亨祥-2		喻亨祥-3			喻亨祥-4				喻亨祥-5
Ta	1.21			1.17			1.18			1.21			1.27			1.25			1.06			1.28			1.22			1.15
W	7.8			9.65			11.8			19.7			7.28			15.8			27.5			20.3			56.5			5.73
Re	0.017			0.022			0.02			0.038			0.015			0.026			0.038			0.052			0.011			0.015
Tl	1.36			0.738			0.889			1.45			0.876			0.764			1.62			0.686
Pb	23.8			12.4			29.4			145			47.6			21.9			246			710			37.4			34.2
Bi	1.18			0.601			1			1.16			0.657			0.553			2.5			62.7
Th	12.6			16.8			18.2			15.6			20.2			16.5			12.2			18.4			26.3			15
U	2.81			3.43			3.84			14.8			4.13			3.61			4.98			4.24			2.04			1.99
Zr	120			94.9			98.3			93.2			126			96.7			92.1			117			104			80.8
Hf	6.03			4.38			5.03			4.32			5.35			4.2			4.14			5.27			3.58			2.66

Sample	t/Ma	¹⁷⁶Yb/¹⁷⁷Hf	2σ	¹⁷⁶Lu/¹⁷⁷Hf	2σ	¹⁷⁶Hf/¹⁷⁷Hf	2σ	ε_Hf(0)	ε_Hf(t)	T_DM1/Ma	T_DM2/Ma	f_Lu/Hf
SKC-5-1	162.0	0.060 150	0.000 308	0.001 486	0.000 010	0.282 433	0.000 014	-12.00	-8.61	1 173	1 756	-0.96
SKC-5-2	164.2	0.076 536	0.002 270	0.001 707	0.000 044	0.282 388	0.000 014	-13.57	-10.15	1 243	1 855	-0.95
SKC-5-3	161.2	0.068 491	0.000 573	0.001 696	0.000 013	0.282 429	0.000 016	-12.12	-8.77	1 184	1 765	-0.95
SKC-5-4	162.0	0.070 266	0.000 567	0.001 754	0.000 013	0.282 415	0.000 016	-12.61	-9.25	1 206	1 796	-0.95
SKC-5-6	160.5	0.073 243	0.000 156	0.001 864	0.000 009	0.282 430	0.000 015	-12.10	-8.78	1 189	1 765	-0.94
SKC-5-7	162.0	0.056 802	0.000 432	0.001 510	0.000 010	0.282 400	0.000 016	-13.16	-9.77	1 220	1 829	-0.95
SKC-5-8	162.0	0.041 586	0.000 271	0.001 088	0.000 003	0.282 409	0.000 014	-12.85	-9.41	1 194	1 807	-0.97
SKC-5-9	162.0	0.057 031	0.001 164	0.001 608	0.000 029	0.282 395	0.000 015	-13.33	-9.95	1 230	1 840	-0.95
SKC-5-10	162.0	0.060 815	0.001 016	0.001 638	0.000 026	0.282 396	0.000 016	-13.29	-9.91	1 229	1 838	-0.95
SKC-5-11	164.0	0.046 765	0.001 636	0.001 438	0.000 071	0.282 397	0.000 022	-13.26	-9.82	1 222	1 834	-0.96
SKC-5-12	163.0	0.044 994	0.000 482	0.001 224	0.000 019	0.282 426	0.000 015	-12.22	-8.78	1 173	1 767	-0.96
SKC-5-13	165.0	0.042 951	0.000 596	0.001 176	0.000 024	0.282 433	0.000 019	-11.99	-8.50	1 162	1 751	-0.96
SKC-5-14	163.0	0.058 611	0.000 706	0.001 594	0.000 018	0.282 407	0.000 017	-12.91	-9.51	1 212	1 813	-0.95
SKC-5-15	165.0	0.054 375	0.000 489	0.001 462	0.000 007	0.282 391	0.000 014	-13.47	-10.01	1 230	1 846	-0.96
SKC-5-16	165.0	0.060 732	0.000 571	0.001 651	0.000 013	0.282 410	0.000 015	-12.79	-9.35	1 209	1 804	-0.95
SKC-5-17	163.0	0.056 307	0.001 360	0.001 516	0.000 029	0.282 359	0.000 017	-14.61	-11.20	1 278	1 920	-0.95
SKC-5-18	163.0	0.060 284	0.000 698	0.001 682	0.000 028	0.282 425	0.000 021	-12.26	-8.87	1 189	1 773	-0.95
SKC-5-19	165.0	0.057 023	0.001 358	0.001 623	0.000 061	0.282 442	0.000 017	-11.68	-8.24	1 164	1 734	-0.95
Sample	t/Ma	¹⁷⁶Yb/¹⁷⁷Hf	2σ	¹⁷⁶Lu/¹⁷⁷Hf	2σ	¹⁷⁶Hf/¹⁷⁷Hf	2σ	ε_Hf(0)	ε_Hf(t)	T_DM1/Ma	T_DM2/Ma	f_Lu/Hf
SKC-4-1	158.5	0.048 149	0.000 824	0.001 222	0.000 022	0.282 425	0.000 017	-12.28	-8.94	1 175	1 774	-0.96
SKC-4-2	154.4	0.043 035	0.000 219	0.001 082	0.000 004	0.282 431	0.000 016	-12.06	-8.79	1 162	1 761	-0.97
SKC-4-3	158.0	0.054 419	0.000 975	0.001 437	0.000 011	0.282 397	0.000 015	-13.26	-9.95	1 221	1 837	-0.96
SKC-4-4	158.0	0.052 119	0.000 697	0.001 336	0.000 013	0.282 398	0.000 015	-13.22	-9.89	1 216	1 834	-0.96
SKC-4-5	158.0	0.068 126	0.000 879	0.001 627	0.000 018	0.282 408	0.000 015	-12.89	-9.59	1 213	1 815	-0.95
SKC-4-6	156.0	0.056 267	0.000 225	0.001 406	0.000 007	0.282 417	0.000 016	-12.56	-9.29	1 192	1 794	-0.96
SKC-4-7	157.0	0.064 913	0.001 252	0.001 608	0.000 032	0.282 421	0.000 016	-12.42	-9.14	1 193	1 786	-0.95
SKC-4-8	155.0	0.087 113	0.001 206	0.002 440	0.000 056	0.282 505	0.000 118	-9.43	-6.27	1 097	1 602	-0.93
SKC-4-9	156.0	0.059 965	0.000 464	0.001 493	0.000 016	0.282 442	0.000 017	-11.67	-8.40	1 159	1 738	-0.96
SKC-4-10	157.5	0.051 321	0.000 882	0.001 323	0.000 039	0.282 410	0.000 018	-12.81	-9.49	1 200	1 808	-0.96
SKC-4-11	158.0	0.024 387	0.001 077	0.000 569	0.000 028	0.282 294	0.000 014	-16.92	-13.51	1 337	2 063	-0.98
SKC-4-12	157.4	0.041 567	0.000 644	0.001 153	0.000 030	0.282 406	0.000 037	-12.95	-9.62	1 200	1 816	-0.97
SKC-4-13	158.0	0.060 840	0.001 203	0.001 482	0.000 021	0.282 395	0.000 018	-13.34	-10.03	1 226	1 842	-0.96
SKC-4-14	155.0	0.060 400	0.000 708	0.001 527	0.000 013	0.282 421	0.000 015	-12.41	-9.16	1 190	1 785	-0.95
SKC-4-15	157.0	0.076 601	0.000 580	0.001 875	0.000 016	0.282 397	0.000 017	-13.25	-10.00	1 235	1 839	-0.94
SKC-4-16	153.4	0.049 778	0.000 670	0.001 379	0.000 033	0.282 406	0.000 020	-12.94	-9.71	1 206	1 819	-0.96
SKC-4-17	153.3	0.056 876	0.000 438	0.001 469	0.000 010	0.282 433	0.000 019	-11.98	-8.77	1 171	1 759	-0.96
SKC-4-20	159.0	0.032 239	0.000 303	0.000 887	0.000 011	0.282 441	0.000 014	-11.69	-8.29	1 142	1 734	-0.97
SKC-4-21	156.5	0.043 889	0.000 452	0.001 147	0.000 007	0.282 444	0.000 018	-11.60	-8.28	1 146	1 731	-0.97
SKC-4-22	157.0	0.031 698	0.000 278	0.000 865	0.000 006	0.282 417	0.000 014	-12.55	-9.19	1 175	1 789	-0.97
SKC-4-23	155.0	0.057 053	0.000 323	0.001 563	0.000 019	0.282 457	0.000 014	-11.13	-7.89	1 140	1 705	-0.95
SKC-4-24	157.0	0.068 774	0.000 715	0.001 802	0.000 014	0.282 355	0.000 016	-14.74	-11.48	1 293	1 933	-0.95
SKC-4-25	156.0	0.045 155	0.000 487	0.001 273	0.000 011	0.282 434	0.000 017	-11.96	-8.67	1 164	1 755	-0.96
SKC-4-26	157.0	0.043 342	0.000 368	0.001 239	0.000 010	0.282 420	0.000 017	-12.44	-9.12	1 182	1 785	-0.96
SKC-4-27	155.0	0.065 170	0.001 949	0.002 261	0.000 059	0.282 366	0.000 024	-14.36	-11.19	1 294	1 913	-0.93
SKC-4-28	156.0	0.043 650	0.000 230	0.001 196	0.000 011	0.282 503	0.000 027	-9.53	-6.23	1 065	1 601	-0.96
SKC-4-29	153.0	0.055 429	0.000 533	0.001 452	0.000 015	0.282 416	0.000 015	-12.60	-9.39	1 195	1 798	-0.96
SKC-4-30	157.0	0.049 419	0.000 471	0.001 432	0.000 018	0.282 347	0.000 016	-15.01	-11.72	1 291	1 948	-0.96