| 赣南大埠复式花岗岩体两期成岩年龄及其地质意义 |
| Received:October 19, 2016 Revised:September 13, 2017 点此下载全文 |
| 引用本文：FANG GuiCong,CHEN ZhengHui,CHEN YuChuan,ZHAO Zheng,HOU KeJun,ZENG ZaiLin,LUO Ze.2017.Two petrogenetic stages of Dabu composite granite pluton in South Jiangxi and their geological implications[J].Mineral Deposits,36(6):1415~1424 |
| Hits: 1700 |
| Download times: 1688 |
| Author Name | Affiliation | | FANG GuiCong | Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration, College of Earth Science, Guilin University of Technology, Guilin 541004, Guangxi, China | | CHEN ZhengHui | Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China | | CHEN YuChuan | Chinese Academy of Geological Sciences, Beijing 100037, China | | ZHAO Zheng | Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China | | HOU KeJun | Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China | | ZENG ZaiLin | Gannan Geological Survey Party, Jiangxi Bureau of Exploration & Development of Geology & Mineral Resources, Ganzhou 341000, Jiangxi, China | | LUO Ze | Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration, College of Earth Science, Guilin University of Technology, Guilin 541004, Guangxi, China |
|
| 基金项目:国家重点研发计划课题（编号：2016YFC0600208）、广西自然科学基金青年基金（编号：2015GXNSFBA139205）、广西隐伏金属矿产勘查重点实验室系统研究课题资助（课题编号16-140-27-03）联合资助 |
|
| 中文摘要:大埠复式花岗岩体位于赣南腹地，是于都-赣县钨多金属矿集区的重要组成部分，其成岩期次及成岩成矿关系尚不十分清楚。文章采用LA-ICP-MS锆石U-Pb法测定了该岩体的成岩时代，结果表明：其东南体似斑状黑云母花岗岩年龄为（430.0±1.1）Ma，西北体斑状黑云母二长花岗岩年龄为（152.7±1.1）Ma。东南体虽对内外接触带铀矿的矿质来源有所贡献，但与西北体形成时代相差甚远，并非同一地质构造背景下的产物；西北体与内外接触带的钨矿床形成时代相近，成因联系密切。矿集区内岩浆活动具多旋回特征，以燕山早期尤其是158~153 Ma的花岗岩浆活动对钨多金属成矿作用最为有利。 |
| 中文关键词:地球化学 地质年代学 锆石U-Pb年龄 大埠花岗岩体 于都-赣县矿集区 赣南 |
| |
| Two petrogenetic stages of Dabu composite granite pluton in South Jiangxi and their geological implications |
|
|
| Abstract:The Dabu composite granitic pluton, located in the heartland of South Jiangxi Province, is an important part of the Yu-Ganxian W-polymetallic ore concentration area. It was dated in this paper by means of the Laser Ablation-Multicollector Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS) method, and the result shows that it has experienced two stages of magmatic activity. The emplacement of its southeastern unit (porphyry-like biotite granite) and northwestern unit (porphyry biotite granite monzogranite) occurred at (430.0±1.1) Ma and (152.7±1.1) Ma, respectively. The former was produced in the geological structural background different from its neighbouring uranium deposits, although it supplied them with a certain amount of mineral source. The latter formed in the same geological background as its endocontact and exocontact tungsten-polymetallic deposits, and is genetically associated with them. Three magmatic cycles have been recognized in Yudu-Ganxian area, with the granitic magmatism in the period of 158~153 Ma being the most favorable magmatism for tungsten-polymetallic mineralization. |
| keywords:geochemistry geochronology zircon U-Pb age Dabu granitic pluton Yu-Ganxian ore concentration area South Jiangxi |
| View Full Text View/Add Comment Download reader |
|
|
|
