梵净山地区燕山期流纹斑岩的发现及地质意义

金属矿山 ›› 2014, Vol. 43 ›› Issue (09): 103-107.

梵净山地区燕山期流纹斑岩的发现及地质意义

宋炯^1,2，覃小锋^1,2，张晓华³，王宗起³，韩小宾⁴

1.桂林理工大学地球科学学院，广西桂林 541006；2.广西隐伏金属矿产勘查重点实验室，广西桂林 541006；3.中国地质科学院矿产资源研究所，北京 100037；4.河北省地勘局秦皇岛矿产水文地质工程大队，河北秦皇岛 066000

出版日期:2014-09-15 发布日期:2015-04-15
基金资助:
* 中国地质调查局地质矿产调查评价项目（编号：12120113095600，12120114039501），广西自然科学基金项目（编号：2013GXNSFAA019272），桂林理工大学人才引进科研启动基金项目（编号：002401003364）。

Discovery of Yanshanian Rhyolite Porphyry in Fanjingshan Area and Its Geological Significance

Song Jiong^1,2，Qin Xiaofeng^1,2，Zhang Xiaohua³，Wang Zongqi³，Han Xiaobin⁴

1.College of Earth Science，Guilin University of Technology，Guilin 541006，China；2.Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration，Guilin 541006，China；3.Institute of Mineral Resources，Chinese Academy of Geological Sciences，Beijing 100037

Online:2014-09-15 Published:2015-04-15

摘要/Abstract

摘要： 采用LA-ICP-MS锆石U-Pb法对黔东北梵净山地区东北部首次发现的流纹斑岩进行年代学的研究，结果表明，流纹斑岩形成于98.9±1.3 Ma的早白垩纪，为燕山期岩浆活动的产物，同时表明本区深部可能存在有大量的印支—燕山期隐伏中酸性花岗岩体，这些隐伏岩体与本区中低温热液型矿产具有密切关系。流纹斑岩的发现及其年龄的确定，对于探讨江南造山带西南段的构造-岩浆演化，特别是指导岩浆热液型金多金属矿产的找矿具有重要意义。

关键词: 流纹斑岩, LA-ICP-MS, 锆石U-Pb年龄, 燕山期, 黔东北梵净山地区

Abstract: China;4.Qinhuangdao Mineral Resources，Hydrogeological and Engineering Geological Party，Hebei Bureau of Geology and Mineral Exploration and Development，Qinhuangdao 066000，China Geochronology of Rhyolite porphyry discovered firstly in northeastern Fanjing Mountain area of northeastern Guizhou Province was studied by using LA-ICP-MS zircon U-Pb method.The research results showed that the rhyolite porphyry is developed during the early cretaceous 98.9±1.3 Ma，and it is the product of Yanshanian magmatism activity.Besides that，there maybe exist plenty of intermediate-acid granitic batholiths in this deep area in Indosinian-Yanshanian era，and these concealed minerals have close relationship with low-medium temperature hydrothermal deposits.The discovery of rhyolite porphyry and the determination of its era are significant to discuss the tectonic-magmatic evolution characteristics of southwestern section of Jiangnan orogenic belt，especially to guide ore prospecting of magmatic hydrothermal polymetallic gold deposits.

Key words: Rhyolite porphyry, LA-ICP-MS, U-Pb Zircon Date, Yanshanian, Fanjing mountain area of northeastern

宋炯, 覃小锋, 张晓华, 王宗起, 韩小宾. 梵净山地区燕山期流纹斑岩的发现及地质意义[J]. 金属矿山, 2014, 43(09): 103-107.

SONG Jiong, QIN Xiao-Feng, ZHANG Xiao-Hua, WANG Zong-Qi, HAN Xiao-Bin. Discovery of Yanshanian Rhyolite Porphyry in Fanjingshan Area and Its Geological Significance[J]. Metal Mine, 2014, 43(09): 103-107.

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