西昆仑大红柳滩东含锂辉石花岗伟晶岩脉年代学和地球化学特征及其地质意义

孔会磊; 任广利; 李文渊; 李侃; 赵晓健; 张江伟; 李伟

doi:10.12401/j.nwg.2023004

西昆仑大红柳滩东含锂辉石花岗伟晶岩脉年代学和地球化学特征及其地质意义

孔会磊^{1, 2,},
任广利¹,
李文渊^1, ,,
李侃¹,
赵晓健¹,
张江伟¹,
李伟¹

1.
中国地质调查局西安地质调查中心，自然资源部岩浆作用成矿与找矿重点实验室，陕西西安　710054
2.
中国地质科学院，北京　100037

基金项目: 国家自然科学基金重大研究计划集成项目“西昆仑–松潘甘孜伟晶岩型锂等大型稀有金属成矿带成矿规律与找矿潜力研究”（92262302），第二次青藏高原综合科学考察研究专题“昆仑–阿尔金–柴北缘成矿带战略储备综合评估”（2019QZKK0806），国家重点研发计划课题“西部锂、铍等战略性金属矿产资源成矿规律与预测评价”（2019YFC0605201）和中国地质调查局项目“西昆仑–阿尔金成矿带铁锰稀有金属矿产地质调查”（DD20230285）联合资助。

详细信息

作者简介:
孔会磊（1985−），男，博士生，高级工程师，从事区域成矿及成矿规律研究。E−mail：konghuilei2008@126.com

通讯作者:
李文渊（1962−），男，博士，研究员，从事岩浆作用矿床及区域成矿研究。E−mail: xalwenyuan@126.com

中图分类号: P618.71；P612
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出版历程
- 收稿日期: 2022-10-25
- 修回日期: 2023-02-06
- 录用日期: 2023-02-08
- 网络出版日期: 2023-02-13
- 刊出日期: 2023-04-19

Geochronology, Geochemistry and Their Geological Significances of Spodumene Pegmatite Veins in the Dahongliutandong Deposit, Western Kunlun, China

1.
Key Laboratory for the Study of Focused Magmatism and Giant Ore Deposits, MNR, Xi’an Center of China Geological Survey, Xi’an 710054, Shannxi, China
2.
Chinese Academy of Geological Sciences, Beijing 100037, China

摘要

摘要:
西昆仑地区是中国重要的伟晶岩型锂铍成矿带，近年来在大红柳滩一带取得重大找矿突破，已形成大型矿产资源基地。笔者对西昆仑大红柳滩东锂辉石花岗伟晶岩进行了详细的岩相学、年代学和地球化学研究，能够为本区伟晶岩型锂矿成矿作用研究提供新的依据。利用LA−ICP−MS锆石U−Pb定年，获得大红柳滩东含锂辉石钠长花岗伟晶岩及含锂辉石电气石花岗伟晶岩年龄分别为（205.2±1.4）Ma和（205.0±2.6）Ma，形成时代为晚三叠世。岩石地球化学研究表明，大红柳滩东含锂辉石花岗伟晶岩以高Si、富Al、富Na、钙碱质，高分异，低K、Fe、Mg、Ca和Ti为特征，属强过铝质花岗伟晶岩。岩石明显富集Rb、U、Nb、Ta、Pb、P、Hf等元素，亏损Ba、Th、La、Ce、Pr、Sr、Nd、Sm、Ti等元素；稀土总量较低，∑REE值为0.56×10⁻⁶～3.34×10⁻⁶，具有弱−中等的负铕异常，δEu值为0.30～0.89。大红柳滩东伟晶岩均具有低且负的ε_Hf(t)值（–4.6～0）和古老的二阶段Hf模式年龄T_DM2（1497～1208 Ma），反映其源岩为古老地壳物质的部分熔融。结合西昆仑地区已有年代学资料和区域地质构造演化特征，认为大红柳滩一带伟晶岩矿床形成于南昆仑地体与甜水海地体后碰撞背景下。
- 地球化学 /
- 花岗伟晶岩 /
- LA−ICP−MS锆石U−Pb定年 /
- 大红柳滩东 /
- 西昆仑
Abstract:
West Kunlun is an important pegmatite−type Li−Be metallogenic belt in China. In recent years, a great breakthrough in prospecting has been made in Dahongliutan area, and a large mineral resource base has been formed. In this paper, detailed researches on petrography, geochronology and geochemistry of the spodumene granite pegmatites in Dahongliutandong, West Kunlun, can provide a new basis for the study of pegmatite−type lithium mineralization in this area. By using LA−ICP−MS zircon U−Pb dating, the ages of spodumene−bearing albite pegmatite and spodumene−bearing tourmaline granite pegmatite in the Dahongliutandong are 205.2±1.4Ma and 205.0±2.6Ma, respectively, in the Late Triassic. Geochemical study shows that spodumene−bearing granite pegmatites in the Dahongliutandong is characterized by high Si, rich Al, Na, calc−alkali, high differentiation and low K, Fe, Mg, Ca and Ti, and belongs to strongly peraluminous granite pegmatite. The pegmatites are obviously rich in elements such as Rb, U, Nb, Ta, Pb, P, Hf, but depleting in elements such as Ba, Th, La, Ce, Pr, Sr, Nd, Sm and Ti. The total amount of rare earth is low, with ∑REE of 0.56×10⁻⁶～3.34×10⁻⁶, weak−medium negative Eu anomaly and δEu of 0.30～0.89. The pegmatites in the Dahongliutandong have low and negative εHf(t) values (–4.6～0) and the old two−stage Hf model age T_DM2(1497～1208 Ma), which indicates that their source rocks are from partial melting of ancient crustal materials. Based on the chronological data and the evolution characteristics of regional geological structure in West Kunlun, it is considered that pegmatite deposits in Dahongliutan area were formed in the background of post-collision between South Kunlun terrane and Tianshuihai terrane.
- geochemistry /
- granite pegmatites /
- zircon LA−ICP−MS U−Pb dating /
- Dahongliutandong /
- West Kunlun

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图 1 西昆仑造山带地质简图及锂铍矿床分布图（据王核等，2021；Yan et al.，2022）

Figure 1. Simplified geological map and distribution of Li−Be deposits of the Western Kunlun orogenic belt

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图 2 大红柳滩一带锂矿床分布图（据李侃等，2019修改）

1.阿克沙依锂矿点；2.阿克塔斯锂矿；3.卡拉喀锂矿；4.509道班西锂矿；5. 505锂矿；6. 507锂矿；7.俘虏沟南1号锂矿；8.俘虏沟南2号锂矿；9.大红柳滩东锂矿；10.黄草湖锂硼矿；11.苦水湖锂硼矿；12.阿克萨依湖锂硼矿

Figure 2. Distribution map of pegmatite−type lithium deposits in Dahongliutan area

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图 3 大红柳滩东锂矿区地质简图

1.第四系；2.二叠系黄羊岭群中组；3.二叠系黄羊岭群下组；4.古元古界康西瓦岩群B岩组二岩段；5.锂辉石伟晶岩脉；6.含电气石不含矿伟晶岩脉；7.长英质伟晶岩脉；8.石英脉；9.正断层；10.性质不明断层；11.采样位置

Figure 3. Simplified geological map of the Dahongliutandong lithium deposit

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图 4 大红柳滩东锂矿典型野外及显微镜下照片

a、b. 花岗伟晶岩与变质砂岩侵入接触；c. 锂辉石钠长花岗伟晶岩脉；d. 锂辉石定向性明显；e. 花岗伟晶岩脉与围岩之间的断层破碎带；f.花岗伟晶岩脉中硅化发育；g. 含锂辉石钠长花岗伟晶岩标本；h、i. 含锂辉石钠长花岗伟晶岩正交偏光照片；j. 含锂辉石电气石花岗伟晶岩标本；h、i. 含锂辉石电气石花岗伟晶岩正交偏光照片；Q.石英；Ab.钠长石；Mus.白云母；Tur.电气石；Spd.锂辉石；Lhp.磷锰锂矿

Figure 4. Typical field photos and microphotograghs of the Dahongliutandong lithium deposit

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图 5 大红柳滩东锂辉石花岗伟晶岩锆石阴极发光照片

实线圈代表锆石LA−ICP−MS U−Pb年龄分析点位置；虚线圈代表锆石Hf同位素分析点位置；圈内数字代表U−Pb分析点号；分析点附近数字代表²⁰⁶Pb/²³⁸U表面年龄及ε_Hf（t）值

Figure 5. CL images of zircons from Dahongliutandong spodumene pegmatites

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图 6 大红柳滩东锂辉石花岗伟晶岩锆石U−Pb 年龄谐和图（a、c）和加权平均年龄（b、d）

Figure 6. (a, c) Zircon U−Pb concordia diagram, and (b, d) weighted mean ages diagram from Dahongliutandong spodumene pegmatites

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图 7 大红柳滩东锂辉石花岗伟晶岩的（K₂O+Na₂O）−SiO₂（a）（据Middlemost，1994）及A/CNK−A/NK图解（b）（Mania et al.，1989）

Figure 7. (a) K₂O−SiO₂, and (b) A/CNK−A/NK plots for the Dahongliutandong spodumene pegmatites

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图 8 大红柳滩东锂辉石花岗伟晶岩的微量元素原始地幔标准化蛛网图（a）及稀土元素球粒陨石标准化配分曲线图（b）（标准化数值据Sun et al.，1989）

Figure 8. (a) Primitive mantle−normalized trace element patterns, and (b) chondrite−normalized REE patterns for the Dahongliutandong spodumene pegmatites

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表 1 大红柳滩东锂辉石花岗伟晶岩LA−ICP−MS锆石U−Pb测年结果

Table 1 LA−ICP−MS zircon U−Pb data for Dahongliutandong spodumene pegmatites

样品编号	含量（10⁻⁶）			Th/U	²⁰⁷Pb/²⁰⁶Pb		²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U		²⁰⁷Pb/²⁰⁶Pb		²⁰⁷Pb/²³⁵U		²⁰⁶Pb/²³⁸U
样品编号	Pb*	Th	U	Th/U	比值	1σ	比值	1σ	比值	1σ	年龄（Ma）	1σ	年龄（Ma）	1σ	年龄（Ma）	1σ
HXUPb01（含锂辉石钠长花岗伟晶岩）
1	2390.9	2755.9	68709.3	0.040	0.0493	0.0006	0.2218	0.0022	0.0327	0.0003	164.2	26.8	203.4	1.8	207.1	1.7
2	98.9	126.8	2900.4	0.044	0.0519	0.0011	0.2275	0.0046	0.0319	0.0003	279.9	48.9	208.1	3.8	202.1	2.0
3	586.1	51.0	16707.8	0.003	0.0527	0.0006	0.2386	0.0021	0.0329	0.0003	317.0	24.2	217.2	1.7	208.4	1.7
5	192.2	6.2	5682.3	0.001	0.0521	0.0006	0.2277	0.0021	0.0317	0.0003	289.9	25.2	208.3	1.7	201.5	1.6
7	2655.5	192.5	76296.6	0.003	0.0489	0.0006	0.2208	0.0022	0.0328	0.0003	144.0	27.4	202.5	1.8	207.9	1.7
10	70.7	166.5	1983.7	0.084	0.0527	0.0009	0.2400	0.0037	0.0331	0.0003	314.8	38.4	218.4	3.1	209.9	1.9
11	57.3	4.2	1705.4	0.002	0.0517	0.0007	0.2249	0.0025	0.0316	0.0003	272.5	28.8	206.0	2.0	200.5	1.7
12	77.1	7.9	2201.7	0.004	0.0510	0.0006	0.2311	0.0024	0.0329	0.0003	240.9	27.7	211.1	2.0	208.8	1.7
15	103.5	7.4	2998.2	0.002	0.0544	0.0009	0.2392	0.0037	0.0320	0.0003	386.2	37.4	217.8	3.0	202.8	1.8
16	45.8	13.4	1318.2	0.010	0.0513	0.0007	0.2298	0.0027	0.0325	0.0003	254.6	30.9	210.1	2.3	206.4	1.7
17	629.6	60.6	18112.3	0.003	0.0501	0.0006	0.2253	0.0024	0.0326	0.0003	200.9	28.3	206.3	2.0	207.0	1.7
18	263.3	26.9	7326.3	0.004	0.0543	0.0006	0.2494	0.0024	0.0334	0.0003	382.8	25.3	226.1	1.9	211.6	1.7
19	4399.2	1254.7	127321.8	0.010	0.0506	0.0005	0.2255	0.0020	0.0324	0.0003	223.0	24.3	206.5	1.6	205.3	1.7
20	115.3	21.7	3340.8	0.006	0.0552	0.0007	0.2432	0.0024	0.0320	0.0003	419.7	25.9	221.0	2.0	203.0	1.7
21	120.0	55.9	3460.9	0.016	0.0517	0.0009	0.2305	0.0038	0.0324	0.0003	271.0	41.1	210.6	3.2	205.5	1.9
22	464.4	91.6	13671.9	0.007	0.0512	0.0006	0.2245	0.0022	0.0318	0.0003	249.6	26.1	205.6	1.8	202.1	1.7
24	128.0	8.0	3732.4	0.002	0.0539	0.0007	0.2369	0.0024	0.0319	0.0003	365.9	27.0	215.9	2.0	202.6	1.7
25	1440.0	291.9	42465.6	0.007	0.0528	0.0006	0.2305	0.0020	0.0317	0.0003	321.3	23.9	210.6	1.7	201.1	1.6
26	168.2	16.6	4838.9	0.003	0.0522	0.0006	0.2342	0.0022	0.0326	0.0003	291.8	25.4	213.6	1.8	206.9	1.7
27	164.4	18.7	4741.4	0.004	0.0520	0.0011	0.2315	0.0044	0.0324	0.0003	283.9	46.7	211.5	3.7	205.3	2.0
28	272.2	16.5	7818.8	0.002	0.0545	0.0006	0.2430	0.0022	0.0324	0.0003	392.4	24.1	220.9	1.8	205.3	1.7
30	71.9	11.6	2101.6	0.005	0.0513	0.0007	0.2270	0.0026	0.0321	0.0003	254.2	29.7	207.8	2.1	203.9	1.7
HXUPb02（含锂辉石电气石花岗伟晶岩）
2	180.0	27.3	5228.3	0.005	0.0544	0.0006	0.2403	0.0024	0.0320	0.0003	387.5	25.5	218.6	1.9	203.2	1.7
3	244.6	3.2	7122.3	0.000	0.0518	0.0006	0.2298	0.0023	0.0322	0.0003	276.2	26.8	210.0	1.9	204.1	1.7
4	103.9	3.2	3129.5	0.001	0.0525	0.0006	0.2247	0.0022	0.0311	0.0003	305.7	25.6	205.8	1.8	197.2	1.6
5	358.7	52.7	10329.3	0.005	0.0537	0.0009	0.2369	0.0035	0.0320	0.0003	356.2	36.6	215.8	2.9	203.1	1.8
8	1544.6	125.6	44470.6	0.003	0.0482	0.0005	0.2174	0.0020	0.0327	0.0003	108.4	25.6	199.7	1.7	207.5	1.7
10	130.1	32.6	3805.5	0.009	0.0495	0.0006	0.2190	0.0022	0.0321	0.0003	173.3	27.3	201.1	1.9	203.5	1.7
11	367.4	57.6	10581.2	0.005	0.0536	0.0006	0.2380	0.0022	0.0322	0.0003	353.7	24.9	216.7	1.8	204.3	1.7
12	74.9	3.5	2115.0	0.002	0.0534	0.0007	0.2429	0.0028	0.0330	0.0003	347.1	29.1	220.8	2.3	209.1	1.8
13	83.1	4.4	2339.3	0.002	0.0538	0.0007	0.2448	0.0028	0.0330	0.0003	363.5	29.5	222.3	2.3	209.1	1.8
14	126.0	1191.0	3668.3	0.325	0.0546	0.0014	0.2341	0.0055	0.0311	0.0003	394.1	54.8	213.6	4.5	197.5	2.1
18	138.2	295.6	3892.2	0.076	0.0480	0.0012	0.2169	0.0049	0.0328	0.0003	98.6	56.7	199.3	4.1	207.8	2.2
19	61.5	5.2	1697.1	0.003	0.0504	0.0006	0.2362	0.0026	0.0340	0.0003	214.7	28.6	215.3	2.1	215.3	1.8
20	199.3	26.0	5839.1	0.004	0.0550	0.0007	0.2389	0.0025	0.0315	0.0003	413.3	26.7	217.5	2.1	199.8	1.7
21	1250.6	128.4	34010.7	0.004	0.0556	0.0006	0.2587	0.0023	0.0338	0.0003	434.8	23.4	233.6	1.8	214.1	1.7
22	173.6	14.5	5015.0	0.003	0.0556	0.0007	0.2451	0.0027	0.0319	0.0003	437.9	27.9	222.6	2.2	202.7	1.7
23	222.8	8.9	6163.0	0.001	0.0551	0.0008	0.2522	0.0033	0.0332	0.0003	416.1	32.0	228.4	2.7	210.5	1.8
24	176.3	22.9	5071.3	0.005	0.0501	0.0013	0.2222	0.0052	0.0321	0.0004	201.3	56.7	203.7	4.3	203.9	2.2
29	221.1	13.2	6537.8	0.002	0.0526	0.0006	0.2274	0.0021	0.0313	0.0003	312.1	24.6	208.0	1.7	198.9	1.6

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表 2 大红柳滩东锂辉石花岗伟晶岩主量元素（%）、稀土和微量元素（10^–6）分析结果

Table 2 Results of major elements (%), REE and trace elements (10^–6) of Dahongliutandong spodumene pegmatites

样品号	HX-H3	HX-H4	HX-H5	HX-H8	HX-H10	HX-H13	HX-H14	HX-H15	HX-H16	HX-H17
岩性	含锂辉石钠长花岗伟晶岩					含锂辉石电气石花岗伟晶岩
SiO₂	72.60	72.32	76.00	77.58	77.29	75.25	78.26	76.97	79.68	74.75
TiO₂	0.01	0.02	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01
Al₂O₃	18.24	18.10	16.26	15.21	15.45	17.04	14.64	15.01	13.34	17.33
Fe₂O₃	0.05	0.10	0.07	0.24	0.29	0.07	0.01	0.01	0.10	0.01
FeO	0.15	0.12	0.10	0.15	0.10	0.10	0.20	0.10	0.10	0.20
MnO	0.05	0.06	0.05	0.12	0.12	0.07	0.07	0.05	0.10	0.06
MgO	0.06	0.07	0.05	0.03	0.03	0.03	0.02	0.02	0.04	0.02
CaO	0.15	0.16	0.14	0.28	0.26	0.28	0.25	0.23	0.30	0.22
Na₂O	5.51	5.46	4.76	2.45	2.70	4.62	4.37	4.60	4.10	4.78
K₂O	0.94	1.83	1.13	0.73	0.96	0.27	0.29	1.75	0.32	0.47
P₂O₅	0.20	0.12	0.14	0.35	0.37	0.23	0.22	0.24	0.27	0.23
LOI	0.77	1.16	0.73	0.68	0.76	0.39	0.31	0.47	0.44	0.20
Total	98.74	99.52	99.42	97.82	98.34	98.35	98.64	99.45	98.78	98.27
A/CNK	1.76	1.61	1.75	2.85	2.60	2.03	1.84	1.52	1.75	1.98
Sc	4.92	4.15	3.14	2.56	2.14	4.37	3.69	2.48	3.12	4.40
Ga	28.20	30.70	26.00	23.60	25.10	22.00	18.70	16.80	17.60	20.70
W	0.58	0.50	0.44	0.64	0.67	0.51	0.39	0.58	0.38	0.51
Bi	0.40	0.36	0.30	0.56	1.62	0.12	0.32	0.55	0.15	0.15
V	2.04	2.35	1.31	0.69	0.34	0.45	0.23	0.13	0.28	0.75
Li	6520.00	3280.00	4780.00	10700.00	9600.00	9650.00	7500.00	4570.00	6420.00	9080.00
Be	126.00	40.10	34.60	136.00	126.00	234.00	225.00	238.00	265.00	24.00
B	11.30	14.40	12.20	12.00	12.00	7.72	7.42	11.10	8.33	9.19
Rb	403.00	843.00	476.00	216.00	305.00	80.30	68.50	399.00	81.10	107.00
Cs	31.90	32.70	22.40	13.30	13.30	10.20	10.50	18.30	18.60	4.10
Ba	12.40	15.90	8.78	7.58	3.29	5.72	3.81	5.92	4.33	2.82
Th	0.32	0.65	0.67	0.29	0.25	0.14	0.10	0.10	0.19	0.09
U	11.40	12.90	11.80	4.32	8.56	7.62	3.90	4.55	8.42	2.74
Ta	113.00	97.70	74.70	43.00	29.70	37.20	20.60	21.00	32.00	18.20
Nb	99.20	64.70	58.40	93.20	59.90	82.20	56.80	85.00	85.80	46.60
Pb	7.08	7.56	6.21	6.97	6.67	9.01	9.06	16.90	11.40	8.42
Sr	19.30	16.70	18.00	31.80	26.80	29.00	32.00	42.30	41.10	19.40
Zr	29.70	25.20	28.20	21.20	6.97	9.36	5.86	3.22	28.90	4.33
Hf	4.28	3.59	3.83	2.33	0.96	0.95	0.55	0.32	3.01	0.80
Cu	10.70	12.40	8.06	1.59	1.37	1.77	1.52	1.42	1.25	1.85
Zn	23.40	25.80	27.80	74.10	69.90	25.30	40.20	80.20	72.00	87.10
Sn	>200	>200	108.00	193.00	160.00	178.00	34.50	38.50	>200	41.00
Y	0.76	0.62	0.69	0.60	0.27	0.32	0.30	0.32	0.46	0.12

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续表2
样品号	HX-H3	HX-H4	HX-H5	HX-H8	HX-H10	HX-H13	HX-H14	HX-H15	HX-H16	HX-H17
岩性	含锂辉石钠长花岗伟晶岩					含锂辉石电气石花岗伟晶岩
La	0.54	0.70	0.50	0.28	0.20	0.19	0.16	0.22	0.12	0.14
Ce	0.99	1.32	0.89	0.53	0.35	0.33	0.28	0.37	0.19	0.20
Pr	0.13	0.14	0.10	0.06	0.04	0.04	0.03	0.05	0.02	0.02
Nd	0.48	0.52	0.36	0.20	0.12	0.14	0.12	0.15	0.08	0.07
Sm	0.13	0.17	0.17	0.07	0.05	0.06	0.04	0.05	0.06	0.03
Eu	0.03	0.03	0.02	0.01	0.01	0.01	0.01	0.02	0.01	0.01
Gd	0.17	0.16	0.18	0.09	0.06	0.07	0.05	0.06	0.07	0.03
Tb	0.03	0.03	0.03	0.02	0.01	0.01	0.01	0.01	0.01	0.00
Dy	0.15	0.14	0.15	0.09	0.06	0.07	0.06	0.06	0.08	0.03
Ho	0.03	0.02	0.02	0.02	0.01	0.01	0.01	0.01	0.01	0.01
Er	0.07	0.05	0.06	0.04	0.03	0.03	0.03	0.03	0.03	0.01
Tm	0.01	0.01	0.01	0.01	0.00	0.00	0.00	0.00	0.00	0.00
Yb	0.05	0.04	0.04	0.04	0.02	0.02	0.03	0.03	0.02	0.01
Lu	0.008	0.007	0.008	0.006	0.004	0.004	0.004	0.004	0.004	0.002
ΣREE	2.81	3.34	2.54	1.45	0.96	0.98	0.84	1.06	0.71	0.56
LREE/HREE	4.49	6.25	4.06	3.91	4.01	3.53	3.22	4.17	2.00	5.35
La_N/Yb_N	7.31	11.41	8.15	5.74	5.98	5.68	4.41	6.31	3.74	8.37
δEu	0.53	0.50	0.30	0.47	0.45	0.56	0.66	0.78	0.40	0.89
δCe	0.92	1.03	0.98	1.01	0.98	0.96	0.96	0.91	0.87	0.88
La_N/Sm_N	2.68	2.66	1.90	2.58	2.39	2.23	2.52	2.63	1.38	3.01
Gd_N/Yb_N	2.65	3.01	3.38	2.03	1.90	2.27	1.69	2.12	2.45	1.72

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表 3 大红柳滩东锂辉石花岗伟晶岩锆石Lu−Hf同位素组成

Table 3 Zircon Lu−Hf isotopic compositions of Dahongliutandong spodumene pegmatites

测点号	t（Ma）	¹⁷⁶Yb/¹⁷⁷Hf	¹⁷⁶Lu/¹⁷⁷Hf	¹⁷⁶Hf/¹⁷⁷Hf	2σ	（¹⁷⁶Hf/¹⁷⁷Hf）_i	ε_Hf（t）	2σ	T_DM1（Ma）	T_DM2（Ma）	f_Lu/Hf
HXUPb01（含锂辉石钠长花岗伟晶岩）
1	207.1	0.001632	0.000032	0.282626	0.000010	0.282626	−0.6	0.4	820	1247	−1.00
2	202.1	0.004044	0.000080	0.282629	0.000012	0.282629	−0.6	0.4	816	1243	−1.00
3	208.4	0.001964	0.000039	0.282620	0.000010	0.282620	−0.8	0.3	828	1260	−1.00
7	207.9	0.003916	0.000064	0.282548	0.000012	0.282548	−3.4	0.4	924	1422	−1.00
10	209.9	0.002892	0.000060	0.282613	0.000008	0.282613	−1.0	0.3	838	1275	−1.00
11	200.5	0.000092	0.000003	0.282598	0.000006	0.282598	−1.8	0.2	856	1314	−1.00
12	208.8	0.003062	0.000061	0.282609	0.000010	0.282609	−1.2	0.3	843	1284	−1.00
15	202.8	0.001188	0.000025	0.282626	0.000009	0.282626	−0.7	0.3	820	1250	−1.00
16	206.4	0.002045	0.000043	0.282607	0.000010	0.282607	−1.3	0.4	845	1290	−1.00
17	207.0	0.000484	0.000010	0.282643	0.000013	0.282643	0.0	0.5	796	1208	−1.00
18	211.6	0.002014	0.000040	0.282632	0.000013	0.282632	−0.3	0.4	812	1230	−1.00
19	205.3	0.001206	0.000021	0.282627	0.000012	0.282627	−0.6	0.4	819	1247	−1.00
20	203.0	0.008771	0.000185	0.282620	0.000014	0.282619	−1.0	0.5	831	1266	−0.99
21	205.5	0.006352	0.000124	0.282586	0.000014	0.282586	−2.1	0.5	875	1339	−1.00
24	202.6	0.000481	0.000009	0.282567	0.000010	0.282567	−2.8	0.3	897	1382	−1.00
25	201.1	0.012967	0.000237	0.282618	0.000018	0.282618	−1.0	0.6	834	1270	−0.99
26	206.9	0.001770	0.000034	0.282634	0.000010	0.282634	−0.3	0.4	809	1229	−1.00
27	205.3	0.001362	0.000024	0.282622	0.000009	0.282622	−0.8	0.3	824	1256	−1.00
28	205.3	0.000782	0.000013	0.282632	0.000012	0.282632	−0.4	0.4	811	1235	−1.00
HXUPb02（含锂辉石电气石花岗伟晶岩）
2	203.2	0.000954	0.000022	0.282631	0.000010	0.282631	−0.5	0.4	812	1237	−1.00
3	204.1	0.001893	0.000019	0.282516	0.000013	0.282516	−4.6	0.5	966	1496	−1.00
4	197.2	0.024472	0.000819	0.282632	0.000013	0.282629	−0.7	0.5	828	1247	−0.98
5	203.1	0.004587	0.000089	0.282589	0.000011	0.282589	−2.0	0.4	870	1333	−1.00
8	207.5	0.000570	0.000025	0.282629	0.000017	0.282629	−0.5	0.6	815	1239	−1.00
10	203.5	0.004761	0.000138	0.282563	0.000012	0.282563	−2.9	0.4	905	1391	−1.00
12	209.1	0.003349	0.000096	0.282584	0.000014	0.282584	−2.1	0.5	877	1340	−1.00
13	209.1	0.007375	0.000195	0.282584	0.000014	0.282584	−2.1	0.5	879	1340	−0.99
14	197.5	0.036880	0.000802	0.282562	0.000019	0.282559	−3.2	0.7	922	1403	−0.98
20	199.8	0.005263	0.000061	0.282517	0.000015	0.282517	−4.6	0.5	965	1497	−1.00
21	214.1	0.009715	0.000244	0.282617	0.000021	0.282616	−0.8	0.7	836	1265	−0.99
22	202.7	0.009710	0.000293	0.282619	0.000014	0.282618	−1.0	0.5	834	1268	−0.99
注：1. ε_Hf（t） = 10000 × {[（¹⁷⁶Hf/¹⁷⁷Hf）_S – （¹⁷⁶Lu/¹⁷⁷Hf）_S × （e^λt – 1）] / [（¹⁷⁶Hf/¹⁷⁷Hf）_CHUR，0– （¹⁷⁶Lu/¹⁷⁷Hf） _CHUR × （e^λt – 1）] – 1}；　　　　2. T_DM1 = 1/λ × ln{1 + [（¹⁷⁶Hf/¹⁷⁷Hf）_S – （¹⁷⁶Hf/¹⁷⁷Hf） _DM]/ [（¹⁷⁶Lu/¹⁷⁷Hf）_S – （¹⁷⁶Lu/¹⁷⁷Hf）_DM]}；　　　　3. T_DM2 = T_DM – （T_DM – t） × [（f_cc – f_s）/（f_cc – f_DM）]. f_Lu/Hf = （¹⁷⁶Lu/¹⁷⁷Hf）_S /（¹⁷⁶Lu/¹⁷⁷Hf） _CHUR – 1；　　　　4. λ = 1.867 × 10⁻¹¹/a；（¹⁷⁶Lu/¹⁷⁷Hf）_S 和（¹⁷⁶Hf/¹⁷⁷Hf）_S 为样品测量值；（¹⁷⁶Lu/¹⁷⁷Hf） _CHUR = 0.0332；（¹⁷⁶Hf/¹⁷⁷Hf）_CHUR，0 = 0.282772；（¹⁷⁶Lu/¹⁷⁷Hf）_DM = 0.0384；（¹⁷⁶Hf/¹⁷⁷Hf） _DM = 0.28325；（¹⁷⁶Lu/¹⁷⁷Hf）_平均地壳 = 0.015； f_cc = [（¹⁷⁶Lu/¹⁷⁷Hf）_平均地壳/（¹⁷⁶Lu/¹⁷⁷Hf） _CHUR] – 1； f_s = f_Lu/Hf; f_DM = [（¹⁷⁶Lu/¹⁷⁷Hf）_DM /（¹⁷⁶Lu/¹⁷⁷Hf） _CHUR] – 1； t 为锆石结晶年龄。

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