| 张遵遵,李泽琴,王奖臻,胡涛,侯春秋.西藏冈底斯成矿带中铅锌矿床的成矿特征[J].地质找矿论丛,2013,28(1):34-40 |
| 西藏冈底斯成矿带中铅锌矿床的成矿特征 |
| Characteristics of lead-zinc deposits in Gangdise metallogenic belt, Tibet, China |
| 投稿时间：2012-02-19 |
| DOI：10.6053/j.issn.1001-1412.2013.01.005 |
| 中文关键词: 铅锌矿床 成矿特征 冈底斯成矿带 西藏自治区 |
| 英文关键词:Pb-Zn deposit metallogenic characteristics Gangdisemetallogenic belt Tibet |
| 基金项目:中国地质调查局综合研究项目(编号:1212010881631)资助。 |
|
| 摘要点击次数: 2286 |
| 全文下载次数: 2102 |
| 中文摘要: |
| 西藏冈底斯成矿带是位于雅鲁藏布江结合带与班公湖—怒江结合带之间的世界级巨型铜多金属成矿带。冈底斯成矿带中铅锌矿床主要有夕卡岩型(接触交代夕卡岩型和层控夕卡岩型)和充填热液脉型2类,矿床的形成与岩浆活动关系密切,成矿时代分为中生代燕山晚期((157.41±1.20) Ma)、新生代喜山早期(65～40 Ma)和喜山晚期(25～10 Ma)等3期。其中,喜山早期为夕卡岩型铅锌矿床最重要的成矿期,喜山晚期为充填热液脉型铅锌矿床的主成矿期。赋矿地层主要为晚古生代石炭-二叠系,其次为中生代侏罗系—白垩系。矿床具有呈EW向带状、SN向串状分布的特征,在局部构造单元内矿床呈丛聚性分布规律。重要的地质事件控制着矿床的形成,是2期或多期地质事件联合作用的结果。层控夕卡岩型铅锌矿是冈底斯成矿带的重要矿化类型之一,往往由热水沉积作用、多期构造改造及岩浆热液活动相互叠加富集而成。 |
| 英文摘要: |
| The Pb-Zn deposits located in Gangdise metallogenic belt can be classified into the skarn type (contact metasomatism skarn type and strata bound skarn type) and the hydrothermal vein type. Late Yanshan period of Mesozoic(157.41±1.20) Ma), Early Himalayan period (65-40 Ma) and Late Himalayan period (25～10 Ma) of Cenozoic are the main metallogenic epochs. The skarn type of Pb-Zn deposits are mainly formed in the Early Himalayan period, the hydrothermal vein type in Late Himalayan period. Late Palaeozoic Carboniferous-Permian system is the main ore-bearing strata then the strata of Mesozoic Jurassic-Cretaceous system. The deposits occur in EW belt and SN string and cluster in local geological structural unit. Formation of the Pb-Zn deposits is controlled by important geological events and is the product of combination of two or more of these geological events. The strata bound skarn lead-zinc deposit is one of the main mineralization in Gangdise metallogenic belt and is formed by inter-superimposition of tectonic reworkings and magmatic-hydrothermal activities on the hot-water sedimentary mineralization. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
