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大兴安岭南段白音诺尔铅锌矿成矿时代确定及其地质意义*
投稿时间:2019-09-02  修订日期:2019-10-21  点此下载全文
引用本文:
DOI:10.19762/j.cnki.dizhixuebao.2020041
摘要点击次数: 30
全文下载次数: 41
作者单位E-mail
蒋斌斌 北京矿产地质研究院 jbb_geo@163.com 
祝新友 北京矿产地质研究院 zhuxinyou@outlook.com 
黄行凯 北京矿产地质研究院  
邹滔 北京矿产地质研究院  
徐巧 北京矿产地质研究院  
刘孜 北京矿产地质研究院  
基金项目:国家重点研发计划“深地资源勘查开采”重点专项项目(项目编号:2017YFC0601300)所属课题(课题编号:2017YFC0601305)所属专题(专题编号:2017YFC0601305-07);内蒙古赤峰有色金属基地综合地质调查,项目编号:DD20160072;青年科学基金项目:脉状岩枝对内蒙古敖仑花斑岩钼矿流体出溶的指示意义(编号:41602098),项目批准号:41602098
中文摘要:内蒙古白音诺尔铅锌矿是我国北方著名的超大型矽卡岩型铅锌矿。矿体呈脉状和囊状,产于中二叠统哲斯组大理岩中,受硅钙面及北东向断裂构造的控制。从穿切关系看,矿体形成晚于区内晚侏罗世满克头鄂博组的火山岩,早于闪长玢岩。通过锆石LA-ICP-MS U-Pb定年,获得了火山岩的年龄为149.9±2.5Ma,闪长玢岩的年龄为140.3±2.6Ma,由此限定成矿年龄在140.3±2.6~149.9±2.5Ma,属于晚侏罗-早白垩世。结合矿床地质特征和区域成矿规律,认为成矿地质可能为同期隐伏高演化花岗岩,暗示深部矿床深部存在巨大找矿前景。
中文关键词:白音诺尔  铅锌矿  成矿年龄  早白垩世  大兴安岭
 
Determination of metallogenic age and its geological significance of Baiyinnor lead-zinc deposit in Southern Da Hinggan Mountains
Author NameAffiliationE-mail
JIANG BINBIN Beijing institute of geology for mineral resources jbb_geo@163.com 
ZHU XINYOU Beijing institute of geology for mineral resources zhuxinyou@outlook.com 
HUANG XINKAI Beijing institute of geology for mineral resources  
ZOU TAO Beijing institute of geology for mineral resources  
XU QIAO Beijing institute of geology for mineral resources  
LIU ZI Beijing institute of geology for mineral resources  
Abstract:Baiyinnuoer lead-zinc deposit in Inner Mongolia is a famous super-large skarn lead-zinc deposit in northern China. The ore bodies are vein-like and cystic, occurring in the marble of the Middle Permian Zhesi Formation and controlled by the silica-calcium surface and NE-trending faults. According to the cut-through relationship, the ore body formed later than the volcanic rocks of the Manketouebo Formation in the late Jurassic and earlier than the diorite porphyrite. By zircon LA-ICP-MS U-Pb dating, the age of volcanic rocks and dioritic porphyries is 149.9 (+2.5 Ma) and 140.3 (+2.6 Ma), which defines the metallogenic age as 140.3 (+2.6) to 149.9 (+2.5 Ma), belonging to the Late Jurassic-Early Cretaceous. Based on the geological characteristics and regional metallogenic regularity of the deposit, it is considered that the metallogenic geology may be concealed high-evolution granite in the same period, suggesting that there is a huge prospecting prospect in the deep part of the deposit.
keywords:Baiyinnuoer  lead-zinc deposit  metallogenic age  early Cretaceous  Da Hinggan Mountains
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