| 李伟,崔育菘,张渝金,张超,刘世峰,杜继宇.内蒙古阿鲁科尔沁旗胜利大队铅锌多金属矿地质特征及成矿时代[J].矿产勘查,2024,15(12):2207-2215 |
| 内蒙古阿鲁科尔沁旗胜利大队铅锌多金属矿地质特征及成矿时代 |
| Geological characteristics and metallogenic age of lead-zinc polymetallic deposit in Shengli Dadui of Ar Horqin Banner, Inner Mongolia |
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| DOI：10.20008/j.kckc.202412004 |
| 中文关键词: 地质特征 成矿时代 二长花岗岩 胜利大队铅锌多金属矿床 |
| 英文关键词: geological characteristics metallogenic age adamellite Shengli brigade lead-zinc polymetallic de. posit |
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| 中文摘要: |
| 胜利大队铅锌多金属矿床位于林西—突泉铅锌银多金属成矿亚带上，为了研究该矿床的地质特征及成矿时代，本文对该矿床进行了矿产地质调查、岩相学观察及年代学研究，结果表明:矿体赋存于晚古生代林西组地层与燕山期二长花岗岩接触带上，矿体呈脉状，北北东向断裂为主要的控矿构造，控制了矿化蚀变带的展布方向。围岩蚀变主要有硅化、绿帘石化、绿泥石化、高岭土化及黄铁矿化等。对矿床成因的初步分析，认为胜利大队铅锌多金属矿床的成因类型为热液充填型脉状矿床。利用激光剥蚀等离子体质谱(LA-ICP-MS)方法对成矿岩体中锆石进行 U-Pb测年，获得其侵位时代为(131.1±1.4)Ma，代表了区域早白垩纪早期的成矿事件，为区域找矿勘查提供参考依据。 |
| 英文摘要: |
| Shengli Dadui Pb-Zn polymetallic deposit is located in Linxi-Tuquan Pb-Zn-Ag polymetallicmetallogenic sub-belt. In order to study the geological characteristics and metallogenic age of the deposit, a mineralgeological survey, petrographic analysis, zircon U-Pb geochronology petrographic analysis were conducted. And thefollowing key observations have been made: The ore body is located at the contact zone between the Late PaleozoicLinxi Formation and the Yanshanian biotite granite; The ore body is vein-shaped, with a NNE-trending fault as theprimary ore-controlling structure, which controls the distribution direction of the alteration zones; Wall rock altera.tion mainly includes silicification, epidotization, chloritization, kaolinization and pyritization; Based on the prelimi.nary analysis of the genesis of the deposit, it is considered that the genetic type of Shengli Dadui Pb-Zn polymetal.lic deposit is hydrothermal filling vein deposit; Zircon U-Pb dating by LA-ICP-MS method shows that the age ofrock mass is (131.1 ±1.4) Ma. This represents an early Cretaceous metallogenic event in the region and provides areference for regional mineral exploration and prospecting. |
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