广东连平大顶铁矿区石背岩体LA-ICP-MS锆石U-Pb年龄及地质意义

林小明; 李宏卫; 黄建桦; 娄; 峰

doi:10.13471/j.cnki.acta.snus.2016.01.022

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广东连平大顶铁矿区石背岩体LA-ICP-MS锆石U-Pb年龄及地质意义

研究论文 | 更新时间：2023-12-11

- 广东连平大顶铁矿区石背岩体LA-ICP-MS锆石U-Pb年龄及地质意义
- LA-ICP-MS zircon U-Pb dating of Shibei pluton at Dading iron mine area in Lianping, Guangdong and its geological significance
- 中山大学学报(自然科学版)(中英文) 2016年55卷第1期页码：131-136
- 作者机构：
  
  1. 广东省地质调查院,广东,广州,510080
  2. 
- 作者简介：
- 基金信息：
- DOI：10.13471/j.cnki.acta.snus.2016.01.022
  中图分类号：
- 纸质出版日期：2016，
  
  网络出版日期：2016-1-25，
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林小明, 李宏卫, 黄建桦, 等. 广东连平大顶铁矿区石背岩体LA-ICP-MS锆石U-Pb年龄及地质意义[J]. 中山大学学报(自然科学版)(中英文), 2016,55(1):131-136.

LA-ICP-MS zircon U-Pb dating of Shibei pluton at Dading iron mine area in Lianping, Guangdong and its geological significance[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2016,55(1):131-136.
林小明, 李宏卫, 黄建桦, 等. 广东连平大顶铁矿区石背岩体LA-ICP-MS锆石U-Pb年龄及地质意义[J]. 中山大学学报(自然科学版)(中英文), 2016,55(1):131-136. DOI： 10.13471/j.cnki.acta.snus.2016.01.022.

LA-ICP-MS zircon U-Pb dating of Shibei pluton at Dading iron mine area in Lianping, Guangdong and its geological significance[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2016,55(1):131-136. DOI： 10.13471/j.cnki.acta.snus.2016.01.022.

摘要

广东连平大顶铁矿被誉为华南第一大铁矿床，为华南地区最为典型的矽卡岩型矿床。对大顶铁矿区与成矿作用有关的石背岩体粗粒斑状黑云母花岗岩和中粒斑状黑云母花岗岩进行LA-ICP-MS锆石U-Pb定年，获得的同位素年龄分别为(174.3±3.6) Ma(MSWD=1.6)和(176.9±4.3) Ma(MSWD=2.6)，表明石背岩体侵位时代为早侏罗世晚期-中侏罗世早期，是燕山第一幕岩浆活动之产物。石背岩体形成于早中生代古太平洋板块向欧亚板块俯冲过程中的挤压构造背景，其物源主要来自于地壳，为壳内物质熔融-岩浆固结而成，与佛冈岩体相似，均为陆壳改造型(S-型)花岗岩。

Abstract

Dading iron mine in Lianping

Guangdong province is well known as the largest iron ore deposit

and is also the most typical skarn type deposit in South China. The LA-ICP-MS zircon U-Pb age of coarsegrain porphyritic biotite granite and mediumgrain porphyritic biotite granite from Dading pluton

closely related to mineralization in Dading mining area

are (174.3±3.6) Ma (MSWD=1.6) and (176.9±4.3) Ma(MSWD=2.6)，respectively

and it shows the emplacement age of Shibei pluton belonged to the early Jurassicmiddle Jurassic

and it was the product of the first magma activity of yanshanian period. The Shibei pluton was formed in extrusion tectonic setting

in the process of subduction of the Pacific plate under Eurasian plate in the early Mesozoic. Its source mainly from crust

formed by crustal material melting and magma consolidation

similar to the Fogang pluton

is crustal transformation type(Stype) granite.

关键词

LA-ICP-MS锆石U-Pb年龄地质意义大顶铁矿石背岩体

Keywords

LA-ICP-MS zircon U-Pb datinggeological significanceDading iron mineShibei pluton

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