| 西藏冈底斯成矿带西段矿床类型、成矿作用和找矿方向 |
| |
| 引用本文： | 黄瀚霄,张林奎,刘洪,李光明,黄勇,兰双双,吕梦鸿.西藏冈底斯成矿带西段矿床类型、成矿作用和找矿方向[J].地球科学,2019,44(6):1876-1887. |
| |
| 作者姓名： | 黄瀚霄 张林奎 刘洪 李光明 黄勇 兰双双 吕梦鸿 |
| |
| 作者单位： | 1.中国地质调查局成都地质调查中心, 四川成都 610081 |
| |
| 基金项目： | 国家重点研发计划SQ2018YFC060162国家重点研发计划2016YFC0600308中国地质调查项目DD20160015中国地质调查项目DD20190542中国地质调查项目DD20190147中国科学院战略性先导科技专项XDA20070304 |
| |
| 摘 要： | 在前人已有成果基础上,通过大量的野外地质调查与室内综合研究,初步论述了冈底斯成矿带西段的金属矿床类型、时空分布特征和成矿作用,探讨了下一步找矿方向.研究结果表明,冈底斯成矿带西段金属矿床(点)类型主要有矽卡岩型、斑岩型和浅成低温热液型,矿床在空间分布上具有东西成带,相对集中的特征,成矿时代集中于中、新生代.依据矿床成因及成矿动力学背景,冈底斯成矿带西段有5期关键成矿作用,分别为晚三叠世-晚白垩世与新特提斯洋北向俯冲有关的铜金多金属成矿作用、中侏罗世-早白垩世与中特提斯洋南向俯冲有关的铁铜金多金属成矿作用、早白垩世末-晚白垩世末与羌塘-拉萨地块碰撞有关的铜金钼成矿作用、晚白垩世末-始新世与印度-亚洲大陆碰撞有关的铜铅锌银多金属成矿作用、渐新世末-中新世与印度-亚洲大陆后碰撞伸展有关的铜金钼多金属成矿作用.冈底斯成矿带西段优势矿种是铜、铁、铅锌、金银等,主攻矿床类型为矽卡岩型矿床、浅成低温热液型矿床和斑岩型矿床等.
|
| 关 键 词： | 冈底斯成矿带 矿床类型 成矿规律 成矿作用 找矿方向 地球化学 |
| 收稿时间： | 2018-08-17 |
Major Types,Mineralization and Potential Prospecting Areas in Western Section of the Gangdise Metallogenic Belt,Tibet |
| |
| Institution: | (Chengdu Center,China Geological Survey,Chengdu 610081,China;Sichuan Institute of Metallurgical Geology and Exploration,Chengdu 610051,China) |
| |
| Abstract: | Based on previous findings, in this study we conducted field and indoor investigations. We discusses deposit types, spatial and temporal distribution and associated characteristics, metallogenesis, and future prospecting direction of the metallic ore deposits in western Gangdese metallogenic belt (GMB). The results indicate that the metallic ore deposits (or ore spots) in the GMB are composed mainly of skarn-, porphyry-and epithermal-type deposits. These deposits spatially occur along a W-E trending belt and formed within Mesozoic and Cenozoic. The GMB can be divided into five critical periods according to deposit genesis and dynamic settings, including:(1) copper-gold polymetallic mineralization during Late Triassic to Late Cretaceous associated with Neo-Tethys northward subduction; (2) iron-copper-gold polymetallic mineralization during Middle Jurassic to Early Cretaceous associated with Middle-Tethys southward subduction; (3) copper-gold-molybdenum polymetallic mineralization during early of Late Cretaceous to Late Cretaceous associated with collision between Qiangtang and Lhasa blocks; (4) copper-lead-zinc-silver polymetallic mineralization during late of Late Cretaceous to Eocene associated with collision between Asian and Indian continents; and (5) copper-gold-molybdenum polymetallic mineralization during Miocene associated with extension following collision between Asian and Indian continents. Prominent minerals in the GMB are copper, iron, lead-zinc, gold-silver, etc. |
| |
| Keywords: | Gangdise metallogenic belt deposit type metallogenic regularity mineralization prospecting direction geochemistry |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《地球科学》浏览原始摘要信息 |
| 点击此处可从《地球科学》下载免费的PDF全文 |
|
