陕西西乡县龙王塘地区新元古代岩体和脉岩锆石U-Pb年代学及源区性质

郑光高; 崔建军; 刘晓春; 陈少锋; 曲玮; 乔建新; 陈龙耀; 赵文平; 李淼; 刘林

doi:10.12090/j.issn.1006-6616.2019.25.04.056

陕西西乡县龙王塘地区新元古代岩体和脉岩锆石U-Pb年代学及源区性质

doi: 10.12090/j.issn.1006-6616.2019.25.04.056

郑光高^{1, 2,},
崔建军¹,
刘晓春^{1, 2},
陈少锋³,
曲玮¹,
乔建新⁴,
陈龙耀¹,
赵文平⁴,
李淼¹,
刘林⁵

1.
中国地质科学院地质力学研究所, 北京 100081
2.
自然资源部古地磁与古构造重建重点实验室, 北京 100081
3.
陕西地矿汉中大队有限公司, 陕西汉中 723000
4.
陕西矿业开发工贸公司, 陕西西安 710054
5.
陕西省矿产资源勘查与综合利用重点实验室, 陕西西安 710054

基金项目:

陕西省地勘基金 61201304167

中国地质调查局地质调查项目 121201104000160916

中国地质调查局地质调查项目 121201103000150017

国家自然科学基金 41172184

江西省学位与研究生教育教学改革研究项目 JXYJG-2018-167

详细信息

作者简介:
郑光高(1987-), 男, 博士, 从事岩石学等研究。E-mail:tiangang755@163.com

中图分类号: P597+.1
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出版历程
- 收稿日期: 2019-02-08
- 修回日期: 2019-05-21
- 刊出日期: 2019-08-01

ZIRCON U-PB AGE AND SOURCE CHARACTERISTICS OF NEOPROTEROZOIC GABBRO AND DYKES IN LONGWANGTANG REGION OF XIXIANG COUNTY, SHAANXI PROVINCE

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
Key Laboratory of Paleomagnetism and Tectonic Reconstruction, Ministry of Natural Resources, Beijing 100081, China
3.
The Hanzhong Geological Team Company ltd, Shaanxi Geological and Mineral Survey and Development Corporation, Hanzhong 723000, Shaanxi, China
4.
Shaanxi Mining Industry & Trade Company, Xi'an 710054, Shaanxi, China
5.
Shaanxi Key Laboratory of Mineral Resources Exploration and Comprehensive Utilization, Xi'an 710054, Shaanxi, China

摘要

摘要: 陕西西乡县广泛出露的晋宁期岩浆岩是研究和理解扬子克拉通基底地质演化的一个窗口。通过对西乡县龙王塘地区的辉长岩体、花岗岩脉和钠长斑岩脉进行锆石U-Pb定年和原位Lu-Hf同位素分析，确定了岩浆侵位时代，揭示了岩浆源区特征。年代学研究结果表明，辉长岩体和花岗岩脉的侵位时间分别为（863.6±4.4）Ma和（863.6±3.8）Ma，是新元古代岩浆作用的产物。在两条钠长斑岩脉中识别出（905.2±8.2）Ma、（807.0±8.9）Ma和（762.5±4.2）Ma三组锆石年龄，第一组为继承锆石的年龄，后两组年龄分别代表两条岩脉的侵位时代。综上可知，龙王塘地区存在~864 Ma、~807 Ma和~763 Ma三期岩浆作用，以及早期（~905 Ma）构造热事件，岩浆作用具有长期性和多阶段性特征。Lu-Hf同位素分析结果表明，辉长岩体和脉岩的ε_Hf（t）平均值介于+7.1~+10.0之间。对已有地质资料进行综合分析发现，汉南地区的绝大多数新元古代岩体的ε_Hf（t）为正值，具有随时间偏离亏损地幔线，接近球粒陨石线的基本演化趋势。上述锆石U-Pb年龄和原位Lu-Hf同位素结果表明，龙王塘地区出露的新元古代岩浆岩起源于亏损地幔或新生地壳的部分熔融，形成于活动型大陆边缘环境。
- 汉南杂岩 /
- 新元古代岩浆岩 /
- 锆石U-Pb年龄 /
- Hf同位素组分 /
- 岩浆源区特征 /
- 活动型大陆边缘
Abstract: There exist a number of Jinningian magmatic rocks in Xixiang county, Shaanxi Province, which is an important "fingerprint" to study and understand the evolution of the Yangtze craton basement. This paper focuses on gabbro body, granite and albitophyre dikes from Longwangtang region, aiming to understand their formation ages and source characteristics through the methods of LA-ICP-MS zircon U-Pb dating and in-situ Lu-Hf isotope analyses. Age data show that gabbro and granite dike emplacement ages are (863.6±4.4) Ma and (863.6±3.8) Ma, respectively, suggesting they are the products of Neoproterozoic magmatism. Three age groups of (905.2±8.2) Ma, (807.0±8.9) and (762.5±4.2) Ma are identified in the two albitophyre dikes; The first group records the inherited zircon ages and the latter two groups represent emplacement ages for the two dikes, respectively. These results suggest that there existed three stages of magmatism (~864 Ma, ~807 Ma and ~763 Ma), and also existed an early tectonic-thermal event (~905 Ma), indicating Longwangtang region has undergone and preserved long-lived and multi-phased intrusive activities. Lu-Hf isotopic analysis shows that these samples have ε_Hf(t) average values of +7.1~+10.0. Based on the comprehensive analysis of the available geological data, most ε_Hf(t) values of Neoproterozoic rocks in Hannan are positive, showing the trend of deviating from depleted mantle line and closing to chondrite line with time in general, indicating the Neoproterozoic magmatic rocks of Hannan mainly derived from the partial melting of depleted mantle or juvenile crust in an active continental margin setting.
- Hannan complex /
- Neoproterozoic magmatic rocks /
- zircon U-Pb dating /
- Hf isotopic compositions /
- source characteristics /
- active continental margin
注释:

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图 1 汉南地区构造纲要图及研究区位置图(据文献[14]修改，年龄数据见表 1)

Figure 1. Structural outline map and location map of the study area in Hannan region (Modified after reference [14]. For a complete list of compiled age data see Table 1)

下载: 全尺寸图片幻灯片

图 2 陕西西乡县龙王塘地区地质简图(据参考文献[37]修改)

Figure 2. The geological sketch map of Longwangtang region in Xixiang, Shaanxi Province (Modified after reference [37])

下载: 全尺寸图片幻灯片

图 3 陕西西乡县龙王塘地区野外产状及典型样品显微结构照片

Qtz—石英; Py—辉石; Hbl—角闪石; Kfs—钾长石; Pl—斜长石; Bi—黑云母; Op—不透明矿物

Figure 3. Field occurrence and typical microstructure photographs of typical samples from Longwangtang region in Xixiang, Shananxi Province (Qtz: quartz; Py: pyroxene; Hbl: hornblende; Kfs: K-feldspar; Pl: plagioclase; Bi: biotite; Op: opaque mineral)

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图 4 陕西西乡县龙王塘地区火成岩锆石U-Pb年龄谐和图和锆石阴极发光图像

Figure 4. U-Pb concordia diagrams and zircon cathodeluminescence images of igneous rocks from Longwangtang region in Xixiang, Shananxi Province

下载: 全尺寸图片幻灯片

图 5 汉南地区火成岩锆石U-Pb年龄频率直方图

(年龄数据来源见表 1)

Figure 5. Cumulative probability histogram of published zircon U-Pb age data of igneous rocks from Hannan region

(Zircon U-Pb age data see Table 1)

下载: 全尺寸图片幻灯片

图 6 汉南地区火成岩锆石ε_Hf(t)-t图解(数据来源[3, 19, 29-30])

Figure 6. Zircon ε_Hf(t) versus t (Ma) diagram of igneous rocks from Hannan region (ε_Hf(t) data are from [3, 19, 29-30] and this study)

下载: 全尺寸图片幻灯片

图 7 汉南地区火成岩锆石T_DM频率直方图(数据来源[3, 19, 29-30]和文中数据)

Figure 7. Cumulative probability histogram of published zircon T_DM data of igneous rocks from Hannan region (T_DM data are from [3, 19, 29-30] and this study)

下载: 全尺寸图片幻灯片

表 1 汉南地区火成岩已有锆石U-Pb年龄一览表

Table 1. Summary of published zircon U-Pb ages of igneous rocks from Hannan region

样号	地点	岩石类型	年龄/Ma	测试方法	参考文献
HN155-1	龙王塘	辉长岩	863.6±4.4	LA-ICP-MS	文中数据
HN155-2	龙王塘	花岗岩脉	863.6±3.8	LA-ICP-MS	文中数据
HN153-1	龙王塘	钠长斑岩脉	905.2±8.2	LA-ICP-MS	文中数据
HN153-1	龙王塘	钠长斑岩脉	807±8.9	LA-ICP-MS	文中数据
HN152-1	龙王塘	钠长斑岩脉	762.5±4.2	LA-ICP-MS	文中数据
L52	碑坝	辉长岩	879±6	LA-ICP-MS	参考文献[29]
L53	天坪河	花岗岩	860±6	LA-ICP-MS	参考文献[29]
L38	桃家坝	花岗闪长岩	770±3	LA-ICP-MS	参考文献[29]
L64	黄官	正长花岗岩	774±4	LA-ICP-MS	参考文献[29]
L42	铁船山	花岗岩	782±4	LA-ICP-MS	参考文献[29]
HN150-1	毕机沟	辉长岩	793±4	LA-ICP-MS	参考文献[32]
HN150-9	毕机沟	花岗岩脉	759±4	LA-ICP-MS	参考文献[32]
HN108-1	潘坝	含矿热液脉	744±10	LA-ICP-MS	参考文献[16]
HN145-3	余家山	辉长岩	808±7	LA-ICP-MS	参考文献[3]
HN145-11	余家山	辉长岩	791±4	LA-ICP-MS	参考文献[3]
BB-17	碑坝	闪长岩	869±5	SIMS	参考文献[33]
WJS-10	望江山	辉长岩	823±6	SIMS	参考文献[33]
WJS-11	望江山	闪长岩	823±5	SIMS	参考文献[33]
BJG-4	毕机沟	闪长岩	785±5	SIMS	参考文献[33]
ZNZ-009	喜神坝	二长花岗岩	706±9.6	LA-ICP-MS	参考文献[14]
ZNZ-030	牟家坝	辉长苏长岩	746±4	LA-ICP-MS	参考文献[14]
ZNZ-032	黄官	二长花岗岩	777±8	LA-ICP-MS	参考文献[14]
ZXX-005	西乡	正长花岗岩	707±20	LA-ICP-MS	参考文献[14]
HN03	五堵门	英云闪长岩	718±9.6	LA-ICP-MS	参考文献[14]
MC01	西河	花岗岩	829±5	LA-ICP-MS	参考文献[14]
MC02	西河	辉长岩	824±4	LA-ICP-MS	参考文献[14]
ZNJ-025	南江	闪长岩	840±6	LA-ICP-MS	参考文献[14]
ZNJ-027	光雾山	花岗岩	838±17	LA-ICP-MS	参考文献[14]
ZWC-022	正源	辉长苏长岩	857±46	LA-ICP-MS	参考文献[14]
ZXX-001	望江山	辉长岩	784.3±6.0	LA-ICP-MS	参考文献[27]
ZXX-007	柳树店	辉长岩	898±10	LA-ICP-MS	参考文献[27]
10BJG-01	西家坝	辉长岩	798.7±4.5	LA-ICP-MS	参考文献[27]
10BJG-12	酉水	辉绿岩	794.7±5.2	LA-ICP-MS	参考文献[27]
10BJG-23	酉水	辉长岩	751.5±6.3	LA-ICP-MS	参考文献[27]
XX16	沙河坎	闪长岩	763.8±9.4	SHRIMP	参考文献[5]
XX05	沙河坎	闪长岩	768±12	SHRIMP	参考文献[5]
XX10	沙河坎	闪长岩	767±11	SHRIMP	参考文献[5]
D11-1	孙家河	英安质火山熔岩	814.8±5.2	SHRIMP	参考文献[25]
08-99TW	南江光雾山	钾长花岗岩	745±11	LA-ICP-MS	参考文献[2]
08-109TW	南江光雾山	石英闪长岩	774±37	LA-ICP-MS	参考文献[2]
08-95TW	旺苍檬子乡	辉长苏长岩	764±38	LA-ICP-MS	参考文献[2]
08-104TW	旺苍檬子乡	角闪辉长岩	766±34	LA-ICP-MS	参考文献[2]
DBS291-1	子午	花岗岩	773±9	ELA-ICPMS	参考文献[34]
LJB16	骆家坝	辉长岩	746±4	SHRIMP	参考文献[19]
BB39	碑坝	辉长岩	814±9	SHRIMP	参考文献[19]
06-3	孙家河	玄武岩	845±17	LA-ICP-MS	参考文献[24]
06-4	孙家河	英安岩	832.9±4.9	LA-ICP-MS	参考文献[24]
06-5	白勉峡	玄武岩	730±13	LA-ICP-MS	参考文献[24]
06-6	大石沟	流纹斑岩	803±5.3	LA-ICP-MS	参考文献[24]
06-7	大石沟	花岗斑岩	776±6.0	LA-ICP-MS	参考文献[24]
06-8-1	望江山	辉长岩	825.5±4.0	LA-ICP-MS	参考文献[24]
WDM25	五堵门	花岗岩类	735±8	SHRIMP	参考文献[30]
RI23	二里坝	花岗岩类	730±6	SHRIMP	参考文献[30]
WCWD-1	五堵门	英云闪长岩	789±10	ELA-ICPMS	参考文献[35]
MCTP-01	天坪河	花岗闪长岩	863±10	ELA-ICPMS	参考文献[35]
	五堵门	花岗闪长岩	764±2	TIMS	参考文献[4]
	黄家营	钾长花岗岩	778±5	TIMS	参考文献[4]
	孙家河	流纹岩	839±2	TIMS	参考文献[4]
BMX-Zir	西乡	英安岩	950±12	TIMS	参考文献[18]
SJH-02	西乡	流纹岩	898±8	TIMS	参考文献[18]
BQZ4	毕机沟	辉长岩	782±14	SHRIMP	参考文献[12]
WQZ1	望江山	辉长岩	808±14	SHRIMP	参考文献[12]
WBZ1	望江山	闪长岩	819±10	SHRIMP	参考文献[12]

下载: 导出CSV

表 2 陕西西乡县龙王塘地区锆石U-Pb年龄数据表

Table 2. Zircon U-Pb age data of Longwangtang region in Xixiang, Shananxi Province

分析点号	Pb	Th	U	Th/U	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ		²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	谐和度
分析点号	×10^-6			Th/U	同位素比值							年龄/Ma						谐和度
HN155-1-1	46	712	265	2.69	0.0693	0.0021	1.3754	0.0383	0.1436	0.0021		909.3	56.5	878.5	16.4	864.9	11.7	98%
HN155-1-2	17	659	98	6.71	0.0761	0.0040	1.4624	0.0669	0.1402	0.0030		1098.2	106.0	915.0	27.6	846.0	17.0	92%
HN155-1-3	99	511	552	0.92	0.0771	0.0018	1.5376	0.0366	0.1433	0.0016		1124.1	46.8	945.5	14.7	863.2	9.1	90%
HN155-1-4	55	1205	306	3.93	0.0767	0.0019	1.5272	0.0447	0.1418	0.0018		1122.2	48.1	941.4	17.9	855.0	10.3	90%
HN155-1-5	63	210	369	0.57	0.0697	0.0015	1.3851	0.0284	0.1431	0.0016		918.2	42.6	882.6	12.1	862.1	9.0	97%
HN155-1-6	43	176	242	0.73	0.0713	0.0018	1.4196	0.0328	0.1438	0.0018		964.8	51.1	897.2	13.8	866.1	9.9	96%
HN155-1-7	101	487	537	0.91	0.0692	0.0015	1.3883	0.0284	0.1444	0.0016		905.6	43.4	884.0	12.1	869.3	9.3	98%
HN155-1-8	99	600	493	1.22	0.0700	0.0014	1.4026	0.0269	0.1444	0.0016		927.8	41.8	890.0	11.4	869.7	8.8	97%
HN155-1-9	36	150	206	0.73	0.0691	0.0021	1.3704	0.0377	0.1441	0.0020		901.9	63.0	876.3	16.1	867.7	11.5	99%
HN155-1-10	53	165	299	0.55	0.0706	0.0020	1.4073	0.0342	0.1447	0.0020		946.3	62.0	892.0	14.4	871.1	11.3	97%
HN155-1-11	50	223	273	0.82	0.0681	0.0019	1.3594	0.0368	0.1441	0.0016		870.1	58.5	871.6	15.8	868.0	9.1	99%
HN155-1-12	29	208	168	1.24	0.0735	0.0044	1.4120	0.0840	0.1390	0.0025		1027.8	121.1	894.0	35.4	839.1	13.9	93%
HN155-1-13	16	118	92	1.29	0.0722	0.0028	1.4337	0.0547	0.1449	0.0029		990.7	77.8	903.1	22.8	872.3	16.3	96%
HN155-1-14	20	66	114	0.58	0.0769	0.0033	1.4992	0.0557	0.1441	0.0030		1117.6	119.0	930.1	22.6	867.9	16.7	93%
HN155-1-15	21	66	123	0.53	0.0723	0.0033	1.4272	0.0671	0.1417	0.0023		994.4	92.6	900.4	28.1	854.3	12.8	94%
HN155-1-16	20	69	121	0.57	0.0762	0.0030	1.4714	0.0529	0.1408	0.0026		1101.9	84.3	918.7	21.7	849.5	14.6	92%
HN155-1-17	88	474	470	1.01	0.0707	0.0016	1.4033	0.0299	0.1435	0.0017		950.0	46.3	890.3	12.6	864.3	9.5	97%
HN155-1-18	44	164	262	0.63	0.0710	0.0018	1.4018	0.0350	0.1433	0.0024		966.7	50.8	889.7	14.8	863.0	13.4	96%
HN155-1-19	66	400	377	1.06	0.0741	0.0018	1.4708	0.0328	0.1435	0.0016		1055.6	50.0	918.4	13.5	864.6	8.9	93%
HN155-1-20	38	150	226	0.67	0.0693	0.0020	1.3802	0.0381	0.1440	0.0021		909.3	57.9	880.5	16.3	867.3	11.7	98%
HN155-1-21	22	126	113	1.12	0.0717	0.0029	1.4135	0.0535	0.1440	0.0025		975.9	81.5	894.6	22.5	867.0	14.1	96%
HN155-1-22	50	161	305	0.53	0.0729	0.0023	1.4156	0.0453	0.1403	0.0020		1009.3	64.8	895.5	19.0	846.5	11.5	94%
HN155-1-23	70	472	396	1.19	0.0728	0.0017	1.4541	0.0314	0.1447	0.0017		1009.3	48.1	911.6	13.0	871.1	9.5	95%
HN155-1-24	20	74	122	0.61	0.0715	0.0029	1.3991	0.0536	0.1444	0.0028		972.2	82.9	888.6	22.7	869.6	15.7	97%
HN155-2-1	102	610	530	1.15	0.0673	0.0013	1.3542	0.0255	0.1458	0.0016		847.8	40.7	869.4	11.0	877.4	8.7	99%
HN155-2-2	94	597	507	1.18	0.0714	0.0013	1.4206	0.0275	0.1440	0.0016		968.5	37.8	897.6	11.5	867.2	9.3	96%
HN155-2-3	120	647	709	0.91	0.0682	0.0012	1.3475	0.0295	0.1430	0.0024		875.9	35.2	866.5	12.7	861.6	13.5	99%
HN155-2-4	39	158	225	0.70	0.0702	0.0017	1.3949	0.0322	0.1446	0.0017		1000.0	50.0	886.8	13.7	870.4	9.7	98%
HN155-2-5	33	167	186	0.89	0.0689	0.0019	1.3652	0.0360	0.1444	0.0020		894.4	56.6	874.1	15.5	869.7	11.1	99%
HN155-2-6	87	482	480	1.01	0.0691	0.0013	1.3782	0.0275	0.1443	0.0016		901.9	38.9	879.7	11.7	868.9	9.0	98%
HN155-2-7	58	209	350	0.60	0.0672	0.0016	1.3482	0.0319	0.1455	0.0021		855.6	50.0	866.8	13.8	875.8	11.8	98%
HN155-2-8	60	333	343	0.97	0.0713	0.0017	1.3980	0.0326	0.1429	0.0024		964.8	48.1	888.1	13.8	861.2	13.7	96%
HN155-2-9	377	2709	1844	1.47	0.0703	0.0011	1.3910	0.0428	0.1435	0.0042		1000.0	30.4	885.1	18.2	864.2	23.9	97%
HN155-2-10	112	723	572	1.27	0.0685	0.0013	1.3548	0.0254	0.1431	0.0016		883.3	34.3	869.6	11.0	862.3	8.8	99%
HN155-2-11	64	359	343	1.04	0.0668	0.0014	1.3023	0.0273	0.1413	0.0018		833.0	44.4	846.7	12.0	851.8	9.9	99%
HN155-2-12	104	586	551	1.06	0.0678	0.0014	1.3338	0.0243	0.1430	0.0015		861.1	40.7	860.5	10.6	861.7	8.2	99%
HN155-2-13	183	1077	958	1.12	0.0675	0.0013	1.3517	0.0286	0.1445	0.0015		853.7	40.7	868.3	12.4	869.8	8.3	99%
HN155-2-14	90	540	475	1.14	0.0683	0.0014	1.3448	0.0275	0.1423	0.0014		879.6	42.6	865.3	11.9	857.6	7.7	99%
HN155-2-15	92	545	485	1.12	0.0697	0.0013	1.3898	0.0261	0.1445	0.0016		920.4	41.7	884.6	11.1	869.9	9.1	98%
HN155-2-16	215	1424	1054	1.35	0.0690	0.0012	1.3755	0.0234	0.1443	0.0014		898.2	34.4	878.5	10.0	868.7	7.8	98%
HN155-2-17	61	330	323	1.02	0.0682	0.0017	1.3567	0.0322	0.1441	0.0015		875.9	47.2	870.4	13.9	867.9	8.4	99%
HN155-2-18	29	99	170	0.58	0.0718	0.0021	1.4060	0.0368	0.1430	0.0019		988.9	59.3	891.5	15.5	861.7	10.6	96%
HN155-2-19	69	385	373	1.03	0.0702	0.0015	1.3651	0.0261	0.1412	0.0016		1000.0	38.0	874.1	11.2	851.7	9.1	97%
HN155-2-20	52	253	293	0.87	0.0689	0.0021	1.3338	0.0394	0.1401	0.0015		894.4	67.6	860.5	17.1	845.5	8.4	98%
HN155-2-21	61	332	333	1.00	0.0692	0.0016	1.3598	0.0304	0.1427	0.0015		905.6	49.2	871.8	13.1	860.1	8.7	98%
HN155-2-22	154	1106	752	1.47	0.0688	0.0012	1.3600	0.0223	0.1429	0.0014		894.4	35.2	871.9	9.6	861.3	8.1	98%
HN155-2-23	149	807	825	0.98	0.0685	0.0011	1.3599	0.0236	0.1435	0.0017		884.9	35.2	871.8	10.2	864.5	9.5	99%
HN155-2-24	80	400	439	0.91	0.0682	0.0018	1.3471	0.0329	0.1431	0.0017		875.9	53.7	866.3	14.2	862.0	9.8	99%
HN153-1-1	26	79	153	0.51	0.0707	0.0025	1.4522	0.0477	0.1498	0.0025		947.2	70.4	910.8	19.8	900.1	14.0	98%
HN153-1-2	52	225	288	0.78	0.0715	0.0016	1.5099	0.0385	0.1520	0.0019		972.2	46.3	934.4	15.6	912.0	10.5	97%
HN153-1-3	18	47	111	0.42	0.0739	0.0032	1.5001	0.0606	0.1488	0.0032		1038.9	86.0	930.4	24.6	894.5	18.0	96%
HN153-1-5	80	486	479	1.01	0.0696	0.0016	1.3225	0.0317	0.1375	0.0022		916.7	41.7	855.6	13.8	830.7	12.4	97%
HN153-1-7	96	533	523	1.02	0.0702	0.0015	1.4484	0.0295	0.1495	0.0018		933.0	45.2	909.2	12.2	898.2	10.0	98%
HN153-1-8	110	495	599	0.83	0.0706	0.0027	1.5158	0.0472	0.1557	0.0025		946.3	77.8	936.8	19.1	932.8	14.2	99%
HN153-1-9	91	673	530	1.27	0.0714	0.0025	1.3197	0.0414	0.1346	0.0027		968.5	71.5	854.4	18.1	813.9	15.4	95%
HN153-1-10	52	253	328	0.77	0.0684	0.0019	1.2852	0.0359	0.1363	0.0022		879.6	83.3	839.2	15.9	823.8	12.5	98%
HN153-1-11	62	276	344	0.80	0.0711	0.0024	1.5210	0.0480	0.1552	0.0021		961.1	63.9	938.9	19.3	929.8	11.8	99%
HN153-1-12	64	437	416	1.05	0.0671	0.0018	1.2086	0.0313	0.1312	0.0023		840.4	55.6	804.6	14.4	794.6	12.9	98%
HN153-1-13	105	536	578	0.93	0.0701	0.0019	1.4613	0.0365	0.1511	0.0020		932.4	55.6	914.5	15.0	907.1	11.1	99%
HN153-1-15	118	740	730	1.01	0.0692	0.0025	1.2478	0.0417	0.1306	0.0025		905.6	80.6	822.4	18.8	791.4	14.3	96%
HN153-1-16	91	518	493	1.05	0.0736	0.0017	1.5074	0.0338	0.1485	0.0017		1029.3	45.2	933.4	13.7	892.8	9.6	95%
HN153-1-17	82	464	495	0.94	0.0690	0.0022	1.2899	0.0489	0.1345	0.0023		898.2	65.6	841.3	21.7	813.6	13.0	96%
HN153-1-19	58	267	328	0.82	0.0700	0.0019	1.4398	0.0335	0.1500	0.0019		927.8	54.2	905.6	14.0	900.7	10.8	99%
HN153-1-20	112	727	692	1.05	0.0662	0.0016	1.2184	0.0281	0.1329	0.0018		813.0	50.8	809.0	12.8	804.3	10.5	99%
HN153-1-21	108	735	631	1.16	0.0696	0.0016	1.2715	0.0286	0.1320	0.0017	916.7	43.5	833.1	12.8	799.0	9.5	95%
HN153-1-22	82	434	504	0.86	0.0695	0.0017	1.3097	0.0327	0.1364	0.0023	922.2	50.8	850.0	14.4	824.1	12.9	96%
HN153-1-23	37	151	207	0.73	0.0735	0.0023	1.5057	0.0465	0.1484	0.0020	1027.8	69.4	932.7	18.8	892.2	11.2	95%
HN153-1-24	62	255	344	0.74	0.0751	0.0035	1.5404	0.0679	0.1491	0.0031	1072.2	92.6	946.7	27.2	896.1	17.3	94%
HN153-1-26	69	296	381	0.78	0.0695	0.0016	1.4528	0.0324	0.1516	0.0018	914.5	48.2	911.0	13.4	909.9	10.0	99%
HN153-1-27	128	861	755	1.14	0.0724	0.0021	1.3181	0.0412	0.1315	0.0020	998.2	57.9	853.7	18.1	796.2	11.2	93%
HN153-1-30	79	446	485	0.92	0.0690	0.0021	1.2610	0.0455	0.1317	0.0019	899.1	63.0	828.4	20.4	797.8	10.6	96%
HN152-1-01	67	254	308	0.82	0.0652	0.0021	1.1247	0.0168	0.1251	0.0015	781.1	65.7	765.2	8.1	760.1	8.4	99%
HN152-1-02	283	1566	932	1.68	0.0690	0.0023	1.1916	0.0206	0.1253	0.0015	898.7	66.8	796.7	9.5	761.0	8.7	96%
HN152-1-03	239	1050	949	1.11	0.0650	0.0020	1.1327	0.0154	0.1265	0.0015	774.1	64.5	769.1	7.3	767.6	8.4	100%
HN152-1-05	137	586	579	1.01	0.0683	0.0022	1.1903	0.0183	0.1265	0.0015	877.1	65.0	796.1	8.5	767.8	8.6	96%
HN152-1-06	88	300	430	0.70	0.0650	0.0022	1.1131	0.0217	0.1243	0.0016	773.5	70.6	759.6	10.4	755.3	9.0	99%
HN152-1-07	87	375	367	1.02	0.0648	0.0028	1.1152	0.0367	0.1248	0.0019	769.1	89.0	760.7	17.6	758.2	10.8	100%
HN152-1-08	198	885	682	1.30	0.0666	0.0021	1.1480	0.0178	0.1252	0.0015	823.9	65.7	776.3	8.4	760.2	8.7	98%
HN152-1-09	101	405	402	1.01	0.0657	0.0023	1.1260	0.0244	0.1243	0.0016	798.0	72.9	765.9	11.7	755.2	9.3	99%
HN152-1-10	109	424	402	1.05	0.0677	0.0024	1.1708	0.0244	0.1256	0.0016	858.1	71.1	787.0	11.4	762.5	9.3	97%
HN152-1-11	124	462	519	0.89	0.0646	0.0021	1.1234	0.0176	0.1262	0.0016	761.6	66.4	764.6	8.4	765.9	8.9	100%
HN152-1-13	218	991	643	1.54	0.0651	0.0021	1.1293	0.0179	0.1259	0.0016	777.2	66.4	767.4	8.5	764.3	9.0	100%
HN152-1-14	188	665	827	0.80	0.0663	0.0021	1.1540	0.0175	0.1263	0.0016	815.4	65.3	779.1	8.3	766.7	9.0	98%
HN152-1-15	170	621	690	0.90	0.0718	0.0023	1.2422	0.0181	0.1256	0.0016	979.1	63.0	819.9	8.2	762.6	8.9	93%
HN152-1-16	285	1567	798	1.96	0.0660	0.0025	1.1396	0.0275	0.1253	0.0017	805.8	75.8	772.3	13.1	760.9	9.9	99%
HN152-1-17	108	385	460	0.84	0.0653	0.0029	1.1433	0.0382	0.1269	0.0020	784.9	89.4	774.1	18.1	770.3	11.4	100%
HN152-1-18	121	406	552	0.73	0.0662	0.0022	1.1463	0.0211	0.1255	0.0016	813.9	68.5	775.5	10.0	762.2	9.4	98%
HN152-1-19	135	407	670	0.61	0.0652	0.0021	1.1250	0.0184	0.1252	0.0016	779.5	66.7	765.4	8.8	760.4	9.2	99%
HN152-1-20	431	2159	1329	1.62	0.0673	0.0021	1.1684	0.0176	0.1259	0.0016		847.1	64.6	785.9	8.2	764.3	9.2	97%

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表 3 陕西西乡县龙王塘地区锆石原位Lu-Hf同位素组分数据

Table 3. Zircon in-situ Lu-Hf isotopic composition data of Longwangtang region in Xixiang, Shananxi Province

测试点	年龄/Ma	¹⁷⁶Yb/¹⁷⁷Hf	¹⁷⁶Lu/¹⁷⁷Hf	¹⁷⁶Hf/¹⁷⁷Hf	±2σ	ε_Hf(0)	ε_Hf(t)	T_DM1/Ma	T_DM2/Ma	f_Lu/Hf
HN155-1-1	863.6	0.056399	0.002101	0.282543	0.000027	-8.1	9.8	1035	1128	-0.94
HN155-1-2	863.6	0.022795	0.000893	0.282502	0.000025	-9.6	9.0	1059	1176	-0.97
HN155-1-3	863.6	0.057625	0.002111	0.282569	0.000022	-7.2	10.7	997	1070	-0.94
HN155-1-4	863.6	0.022631	0.000892	0.282544	0.000022	-8.1	10.5	1000	1081	-0.97
HN155-1-5	863.6	0.044045	0.001686	0.282507	0.000028	-9.4	8.7	1074	1192	-0.95
HN155-1-6	863.6	0.025991	0.001053	0.282510	0.000026	-9.3	9.2	1052	1163	-0.97
HN155-1-7	863.6	0.045756	0.001807	0.282537	0.000025	-8.3	9.7	1034	1130	-0.95
HN155-1-8	863.6	0.047205	0.001908	0.282507	0.000028	-9.4	8.6	1081	1202	-0.94
HN155-1-9	863.6	0.061977	0.002460	0.282535	0.000029	-8.4	9.3	1056	1157	-0.93
HN155-1-10	863.6	0.036924	0.001471	0.282516	0.000036	-9.0	9.2	1055	1164	-0.96
HN155-1-11	863.6	0.046751	0.001889	0.282540	0.000027	-8.2	9.8	1032	1126	-0.94
HN155-1-12	863.6	0.059521	0.002152	0.282582	0.000025	-6.7	11.1	979	1042	-0.94
HN155-1-13	863.6	0.056339	0.002241	0.282566	0.000027	-7.3	10.5	1005	1082	-0.93
HN155-1-14	863.6	0.059601	0.002398	0.282550	0.000024	-7.9	9.9	1033	1123	-0.93
HN155-1-15	863.6	0.022346	0.000909	0.282549	0.000025	-7.9	10.7	994	1071	-0.97
HN155-1-16	863.6	0.070723	0.002760	0.282538	0.000032	-8.3	9.2	1061	1163	-0.92
HN155-1-17	863.6	0.086105	0.003152	0.282590	0.000039	-6.4	10.8	994	1060	-0.91
HN155-1-18	863.6	0.036184	0.001427	0.282563	0.000027	-7.4	10.9	987	1057	-0.96
HN155-1-19	863.6	0.011469	0.000492	0.282499	0.000022	-9.6	9.2	1051	1166	-0.99
HN155-1-20	863.6	0.060051	0.002331	0.282565	0.000037	-7.3	10.4	1008	1085	-0.93
HN155-1-21	863.6	0.036360	0.001454	0.282548	0.000025	-7.9	10.3	1009	1092	-0.96
HN155-1-22	863.6	0.059154	0.002306	0.282602	0.000027	-6.0	11.7	954	1003	-0.93
HN155-1-23	863.6	0.063485	0.002511	0.282581	0.000028	-6.7	10.9	990	1056	-0.92
HN155-1-24	863.6	0.047793	0.001842	0.282533	0.000038	-8.4	9.6	1041	1139	-0.94
HN155-2-1	864.2	0.041277	0.001626	0.282464	0.000027	-10.9	7.3	1134	1286	-0.95
HN155-2-3	864.2	0.077298	0.002902	0.282544	0.000026	-8.1	9.4	1056	1154	-0.91
HN155-2-4	864.2	0.085232	0.003164	0.282559	0.000034	-7.5	9.7	1042	1130	-0.90
HN155-2-5	864.2	0.079610	0.002831	0.282573	0.000027	-7.0	10.4	1011	1087	-0.91
HN155-2-6	864.2	0.040457	0.001654	0.282503	0.000025	-9.5	8.6	1079	1200	-0.95
HN155-2-7	864.2	0.033144	0.001327	0.282494	0.000026	-9.8	8.5	1082	1208	-0.96
HN155-2-10	864.2	0.066690	0.002513	0.282463	0.000045	-10.9	6.7	1163	1321	-0.92
HN155-2-11	864.2	0.048169	0.001858	0.282514	0.000029	-9.1	8.9	1070	1184	-0.94
HN155-2-12	864.2	0.032695	0.001290	0.282498	0.000023	-9.7	8.7	1076	1199	-0.96
HN155-2-13	864.2	0.060506	0.002129	0.282608	0.000040	-5.8	12.1	941	982	-0.94
HN155-2-14	864.2	0.049969	0.001906	0.282568	0.000030	-7.2	10.8	993	1065	-0.94
HN155-2-16	864.2	0.026443	0.001004	0.282523	0.000023	-8.8	9.7	1032	1132	-0.97
HN155-2-17	864.2	0.027073	0.001028	0.282527	0.000028	-8.7	9.8	1028	1124	-0.97
HN155-2-18	864.2	0.038359	0.001457	0.282512	0.000025	-9.2	9.1	1060	1172	-0.96
HN155-2-19	864.2	0.073599	0.002581	0.282629	0.000030	-5.0	12.6	921	951	-0.92
HN155-2-20	864.2	0.093560	0.003509	0.282604	0.000029	-5.9	11.1	984	1041	-0.89
HN155-2-21	864.2	0.030941	0.001161	0.282458	0.000029	-11.1	7.3	1129	1284	-0.97
HN155-2-22	864.2	0.054892	0.002085	0.282530	0.000024	-8.6	9.3	1053	1155	-0.94
HN155-2-24	864.2	0.049069	0.001950	0.282535	0.000035	-8.4	9.6	1041	1139	-0.94
HN153-1-1	905.2	0.029117	0.001098	0.282589	0.000023	-6.5	12.9	942	963	-0.97
HN153-1-2	905.2	0.035206	0.001418	0.282510	0.000029	-9.3	9.9	1063	1153	-0.96
HN153-1-3	905.2	0.043828	0.001566	0.282583	0.000031	-6.7	12.4	962	994	-0.95
HN153-1-5	807	0.039272	0.001547	0.282490	0.000035	-10.0	7.0	1094	1257	-0.95
HN153-1-7	905.2	0.035629	0.001401	0.282501	0.000026	-9.6	9.6	1075	1172	-0.96
HN153-1-8	905.2	0.060927	0.002357	0.282605	0.000031	-5.9	12.7	951	975	-0.93
HN153-1-9	807	0.055764	0.002179	0.282500	0.000031	-9.6	7.0	1099	1257	-0.93
HN153-1-10	807	0.047279	0.001816	0.282554	0.000031	-7.7	9.2	1010	1123	-0.95
HN153-1-11	905.2	0.040836	0.001655	0.282520	0.000026	-8.9	10.1	1055	1139	-0.95
HN153-1-12	807	0.044267	0.001743	0.282479	0.000030	-10.4	6.5	1116	1289	-0.95
HN153-1-13	905.2	0.057414	0.002187	0.282579	0.000028	-6.8	11.9	985	1028	-0.93
HN153-1-15	807	0.043368	0.001708	0.282493	0.000038	-9.9	7.0	1095	1256	-0.95
HN153-1-16	905.2	0.059118	0.002281	0.282490	0.000029	-10.0	8.7	1116	1229	-0.93
HN153-1-17	807	0.037813	0.001524	0.282441	0.000033	-11.7	5.3	1164	1367	-0.95
HN153-1-19	905.2	0.045986	0.001885	0.282512	0.000024	-9.2	9.7	1072	1165	-0.94
HN153-1-20	807	0.046516	0.001779	0.282536	0.000026	-8.4	8.5	1036	1163	-0.95
HN152-1-01	762.5	0.019316	0.000795	0.282512	0.000020	-9.2	7.2	1042	1209	-0.98
HN152-1-02	762.5	0.019135	0.000854	0.282611	0.000020	-5.7	10.7	905	990	-0.97
HN152-1-03	762.5	0.067974	0.002712	0.282549	0.000025	-7.9	7.6	1042	1188	-0.92
HN152-1-05	762.5	0.028815	0.001127	0.282532	0.000021	-8.5	7.8	1023	1176	-0.97
HN152-1-06	762.5	0.041734	0.001664	0.282531	0.000022	-8.5	7.5	1039	1195	-0.95
HN152-1-07	762.5	0.013375	0.000543	0.282503	0.000021	-9.5	7.0	1048	1222	-0.98
HN152-1-08	762.5	0.021783	0.000871	0.282537	0.000019	-8.3	8.1	1009	1157	-0.97
HN152-1-09	762.5	0.024488	0.000995	0.282526	0.000018	-8.7	7.6	1028	1185	-0.97
HN152-1-10	762.5	0.087455	0.003181	0.282484	0.000061	-10.2	5.0	1154	1349	-0.90
HN152-1-11	762.5	0.086213	0.003397	0.282525	0.000026	-8.7	6.4	1100	1265	-0.90
HN152-1-13	762.5	0.033641	0.001387	0.282509	0.000021	-9.3	6.8	1063	1236	-0.96
HN152-1-14	762.5	0.058340	0.002324	0.282484	0.000022	-10.2	5.5	1126	1321	-0.93
HN152-1-15	762.5	0.031340	0.001230	0.282524	0.000019	-8.8	7.4	1038	1198	-0.96
HN152-1-16	762.5	0.146595	0.005742	0.282609	0.000028	-5.8	8.2	1042	1151	-0.83
HN152-1-17	762.5	0.068737	0.002687	0.282515	0.000025	-9.1	6.4	1093	1264	-0.92
HN152-1-18	762.5	0.079004	0.002936	0.282553	0.000023	-7.7	7.6	1043	1186	-0.91
HN152-1-19	762.5	0.044823	0.002007	0.282461	0.000049	-11.0	4.8	1150	1363	-0.94
HN152-1-20	762.5	0.110444	0.004287	0.282537	0.000022	-8.3	6.4	1109	1265	-0.87
注：ε_Hf(0)=[(¹⁷⁶Hf/¹⁷⁷Hf)_S/(¹⁷⁶Hf/¹⁷⁷Hf)_{CHUR, 0}-1]×10⁴；ε_Hf(t)={[(¹⁷⁶Hf/¹⁷⁷Hf)_S-(¹⁷⁶Lu/¹⁷⁷Hf)_S×(e^λt-1)]/[(¹⁷⁶Hf/¹⁷⁷Hf)_{CHUR, 0}-(¹⁷⁶Lu/¹⁷⁷Hf)_CHUR×(e^λt-1)]-1}×10⁴；T_DM1=1/λ×In{1+[(¹⁷⁶Hf/¹⁷⁷Hf)_S-(¹⁷⁶Hf/¹⁷⁷Hf)_DM]/[(¹⁷⁶Lu/¹⁷⁷Hf)_S-(¹⁷⁶Lu/¹⁷⁷Hf)_DM]}；T_DM2=T_DM1-(T_DM1-t)×[(f_cc-f_s)/(f_cc-f_DM)]；f_Lu/Hf=(¹⁷⁶Lu/¹⁷⁷Hf)_S-(¹⁷⁶Lu/¹⁷⁷Hf)_CHUR-1；其中：(¹⁷⁶Lu/¹⁷⁷Hf)_S和(¹⁷⁶Hf/¹⁷⁷Hf)_S为样品测量值，t为锆石结晶年龄，(¹⁷⁶Hf/¹⁷⁷Hf)_{CHUR, 0}=0.282772，(¹⁷⁶Lu/¹⁷⁷Hf)_CHUR=0.0332，(¹⁷⁶Hf/¹⁷⁷Hf)_DM=0.28325，(¹⁷⁶Lu/¹⁷⁷Hf)_DM=0.0384^[43-44]，λ=1.867×10^-11a^-1^[45]，(¹⁷⁶Lu/¹⁷⁷Hf)_C=0.015，f_cc=[(¹⁷⁶Lu/¹⁷⁷Hf)_C/(¹⁷⁶Lu/¹⁷⁷Hf)_CHUR]-1，f_s=f_Lu/Hf，f_DM=[(¹⁷⁶Lu/¹⁷⁷Hf)_DM/(¹⁷⁶Lu/¹⁷⁷Hf)_CHUR]-1

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