[1]倪 康,武 彬,叶现韬.新疆阿尔金北缘拉配泉组流纹岩的锆石U-Pb年龄及其地质意义[J].华东地质,2017,38(03):168-174.[doi:10.16788/j.hddz.32-1865/P.2017.03.002]
　NI Kang,WU Bin,YE Xian-tao.Zircon U-Pb dating of rhyolite of the Lapeiquan Formation in north Altyn Tagh, Xinjiang and its geological implications[J].East China Geology,2017,38(03):168-174.[doi:10.16788/j.hddz.32-1865/P.2017.03.002]
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新疆阿尔金北缘拉配泉组流纹岩的锆石U-Pb年龄及其地质意义()
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《华东地质》[ISSN:2096-1871/CN:32-1865/P]

卷:
38
期数:
2017年03期
页码:
168-174
栏目:
基础地质
出版日期:
2017-09-15

文章信息/Info

Title:
Zircon U-Pb dating of rhyolite of the Lapeiquan Formation in north Altyn Tagh, Xinjiang and its geological implications
文章编号:
2096-1871(2017)03-168-07
作者:
倪 康1; 武 彬2; 叶现韬3
(1. 福建省闽西地质大队,厦门 361000; 2. 南京地质矿产研究所,南京 210016; 3. 河海大学海洋学院,南京 210098)
Author(s):
NI Kang1;  WU Bin2;  YE Xian-tao3
(1. The Geological Party of Western Fujian Province, Xiamen 361000, China; 2. Nanjing Institute of Geology and Mineral Resources, Nanjing 210016, China; 3. College of Oceanography, Hohai University, Nanjing 210098, China)
关键词:
拉配泉组;  流纹岩;  U-Pb年龄;  喀腊大湾矿集区;  阿尔金北缘
Keywords:
Lapeiquan Formation;  rhyolite;  U-Pb dating;  Kaladawan ore field;  North Altyn Tagh
分类号:
P588.147
DOI:
10.16788/j.hddz.32-1865/P.2017.03.002
文献标志码:
A
摘要:
阿尔金北缘喀腊大湾是阿尔金地区最著名也是最重要的Fe-Cu-Pb-Zn-Ag多金属矿集区。作为该矿集区的容矿地层,拉配泉组为一套火山—沉积岩组合,其时代一直没有获得较好的限定。本文通过对拉配泉组三段流纹岩进行LA-ICP-MS锆石U-Pb年龄测定,获得拉配泉组206Pb/238U加权平均年龄为488±2 Ma,应属于寒武系,而非奥陶系、震旦系或蓟县系。结合前人研究成果,认为拉配泉组形成于岛弧环境,对该矿集区成矿地质背景研究具有重要的科学意义。
Abstract:
The Kaladawan area in the northern margin of Altyn Tagh is the most important and famous Fe-Cu-Pb-Zn-Ag polymetallic ore cluster field in Altyn Tagh. The Lapeiquan Formation, as the ore-bearing stratum in the ore cluster area, consists of one set of volcanic-sedimentary rock assemblage, but its formation age has not been restricted. This study carried out LA-ICP-MS zircon U-Pb dating for rhyolite from the third member of the Lapeiquan Formation. A weighted 206Pb/238U age of 488±2 Ma was obtained for the Lapeiquan Formation, indicating that the Lapeiquan Formation belongs to upper Cambrian, not Ordovician, Sinian or Jixian System. This finding, together with previous work, suggests that the Lapeiquan Formation formed in the continental arc setting. This study is of important scientific significance for understanding the metallogenetic and geological setting of the Kaladawan ore cluster area.

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备注/Memo

备注/Memo:
*收稿日期:2016-09-28 修订日期:2016-11-16 责任编辑:谭桂丽
基金项目:新疆阿尔金山喀腊大湾一带整装勘查区铁多金属成矿规律与工程验证。
第一作者简介:倪康,1970年生,男,高级工程师,主要从事区域地质调查与研究工作。
更新日期/Last Update: 2017-09-18