摘要
四川九寨沟草地金矿床位于我国著名的"陕甘川金三角"卡林-类卡林型金矿成矿带内。赋矿岩石主要为花岗斑岩及构造角砾岩。至今,矿床的成矿物质来源仍存在争议。本文通过分析金矿体中黄铁矿和毒砂的硫、铅同位素组成及特点,判断矿床的成矿物质来源。结合前人研究成果认为,泥盆系三河口组、石炭系及碧口群是矿石中铅同位素的来源。
The Caodi Au Deposit in Jiuzhai Valley, Sichuan lies in Carlin-type Au metallogenic belt, Shaanxi-Gansu-Sichuan Golden Triangle Area. Au-bearing rocks consist mainly of granite porphyry and tectonic breccia. Pb and S isotopic compositions for pyrite and arsenopyrite indicate that ore material was derived from the Middle and Late Proterozoic Bikou Group and Devonian Sanhekou Formation as well as Carbonaceous.
出处
《四川地质学报》
2015年第4期496-500,共5页
Acta Geologica Sichuan
关键词
金矿床
同位素
成矿物质来源
九寨沟
Au deposit
isotopic composition
ore material source
Caodi
Jiuzhai Valley
