[1]李玉松,蔡晓兵,汪 晶,等.安徽庐枞盆地黄寅冲铅锌矿床闪长玢岩锆石U-Pb年龄及其地质意义[J].华东地质,2016,37(01):19-27.[doi:10.16788/j.hddz.32-1865/P.2016.01.003]
 LI Yu-song,CAI Xiao-bing,WANG Jing,et al.Zircon U-Pb age of diorite-porphyrites of the Huangyinchong Zn-Pb deposit in the Luzong basin, Anhui Province and its geological implications[J].East China Geology,2016,37(01):19-27.[doi:10.16788/j.hddz.32-1865/P.2016.01.003]
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安徽庐枞盆地黄寅冲铅锌矿床闪长玢岩锆石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:
37
期数:
2016年01期
页码:
19-27
栏目:
基础地质
出版日期:
2016-03-15

文章信息/Info

Title:
Zircon U-Pb age of diorite-porphyrites of the Huangyinchong Zn-Pb deposit in the Luzong basin, Anhui Province and its geological implications
文章编号:
2096-1871(2016)01-019-09
作者:
李玉松<sup>1</sup>蔡晓兵2汪 晶23岳运华2张 舒24
1.安徽省地球物理地球化学勘查技术院,合肥,230001)(2 安徽省地质调查院,合肥 230001;
3. 中国科学与技术大学地球和空间科学学院,合肥 230026;
4. 合肥工业大学资源与环境工程学院,合肥 230009
Author(s):
LI Yu-song1CAI Xiao-bing2WANG Jing23YUE Yun-hua2ZHANG Shu24
1. Institute of Geological and Geochemical prospecting Technology of Anhui Provnce, Hefei 230001,China)(2.Anhui Institute of Geological Survey, Hefei 230001, China;
3. School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China;
4. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China
关键词:
庐枞盆地黄寅冲铅锌矿闪长玢岩锆石U-Pb定年
Keywords:
Luzong basin Huangyinchong Zn-Pb deposit diorite-porphyrite zircon U-Pb dating
分类号:
P618.4
DOI:
10.16788/j.hddz.32-1865/P.2016.01.003
文献标志码:
A
摘要:
庐枞盆地是长江中下游成矿带中最重要的铁(铜)矿集区之一,盆地内早白垩世闪长玢岩与成矿作用关系密切,但目前对庐枞盆地闪长玢岩的形成时代仍存在争议。本文对庐枞盆地内黄寅冲铅锌矿区钻孔深部的两块闪长玢岩样品进行LA-ICP-MS锆石U-Pb定年,结果显示这两块闪长玢岩样品中锆石的206Pb/238U加权平均年龄结果在误差范围内一致,分别为135±1 Ma和134.9±0.5 Ma,表明庐枞盆地内黄寅冲铅锌矿区内闪长玢岩的形成时代在135Ma左右,进一步证实了庐枞盆地可能存在一期较早的岩浆活动。该期岩浆作用形成于庐枞盆地由挤压—拉张转换的构造背景下,形成于138~132Ma之间,并在135Ma左右最为活跃,同时在庐枞盆地不同位置形成了一系列与闪长玢岩相关的铁—铜—铅—锌矿产。
Abstract:
The Luzong basin is one of the most important Fe-Cu ore concentration regions in the metallogenic belts along the middle and lower reaches of the Yangtze River. The early Cretaceous diorite-porphyrites are closely associated with metallization in the Luzong basin, but its diagenetic age is still controversial. The zircon LA-ICP-MS U-Pb dating for two diorite-porphyrite samples from deep holes in the Huangyinchong Zn-Pb deposit yielded the weighted mean 206Pb /238U ages of 135±1 Ma and 134.9±0.5 Ma, respectively, suggesting the diagenetic age of the diorite-porphyrites in the Huangyinchong Zn-Pb deposit is about 135Ma. It further confirms existence of an earlier magmatic activity in the Luzong basin, which might result from the tectonic setting from extrusion to tension during the period of 138~132Ma, with the most active period at ca. 135Ma. At the same time, a series of the Fe-Au-Zn-Pb deposits related to diorite-porphyrite were formed at different positions of the Luzong basin.

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备注/Memo

备注/Memo:
基金项目:中国地质调查局地质调查项目(项目编号:12120114038001、1212011120862、12120113069600)和安徽省地勘局地质科研项目(项目编号:KJ2014-02)联合资助。
第一作者简介:蔡晓兵,1968年生,男,高级工程师,硕士,矿产地质勘查专业,从事地质矿产勘查、研究和技术管理工作。
更新日期/Last Update: 2016-03-30