西藏则得兄铅锌多金属矿床地质特征与成因探讨  

Discuss on Geological Characteristics and Genesis of the Zedexiong Lead-zinc Polymetallic Deposit in Xizang

作　　者：段晋[1] 吴斌 DUAN Jin WU Bin(The Third Geological Exploration Institute, China Metallurgical Geoexploration ＆ Engineering Bureau, Taiyuan 030002, Chin)

机构地区：[1]中国冶金地质总局第三地质勘查院,山西太原030002

出　　处：《甘肃冶金》2017年第6期64-67,73,共5页Gansu Metallurgy

摘　　要：则得兄铅锌多金属矿床处于隆格尔-工布江达弧背断隆带东段门巴-多其木断裂北侧龙马拉-亚桂拉铅锌(银)多金属成矿带东部,矿区内已发现7条铅锌多金属矿体和10条铅锌银铜矿(化)体,矿体主要赋存于上石炭-下二叠统来姑组的第二岩性段破碎带中,多呈脉状产出。矿物共生组合主要有方铅矿-黄铁矿-黄铜矿、黄铁矿-黄铜矿、磁铁矿-磁黄铁矿-方铅矿。围岩蚀变主要有硅化、碳酸岩化、绿帘石化、绿泥石化。矿床受地层层位和岩相古地理环境的控制,部分成矿物质来源于火山岩,成因类型为热水沉积与岩浆热液叠加改造型铅锌矿床。The lead-zine-polymetallic deposit is in the eastern part of the Longgang-Yagui-Dai-Zeng-Zang （silver） poly- metallic metallogenie belt on the north side of the Mumba-Duoqia fault The results show that there are seven lead-zinc poly- metallic ore bodies and 10 lead-zinc-silver-copper deposits, which are mainly found in the second lithologic section of the Upper Carboniferous-Lower Permian, Pulse output. Mineral symbiotic combinations are mainly galena - pyrite - ehalcopy- rite, pyrite - chalcopyrite, magnetite - pyrrhotite - galena. The alteration of the surrounding rock is mainly silicification, carbonate rocking, green curtain petrochemical, cbloritization. The ore deposits are controlled by stratigraphic horizons and lithofacies palaeogeographic environments. Some of the ore-forming materials are derived from volcanic rocks. The genetic types are hot-water sediments and magmatic hydrothermal superimposed lead-zinc deposits.

关 键 词：铅锌多金属矿床 地质特征 矿床成因 则得兄 西藏 

分 类 号：P618.2[天文地球—矿床学]