祁连山新元古代—早古生代火山作用与铁-铜多金属成矿
Late Neoproterozoic to Early Paleozoic volcanism and iron-copper polyme-tallic mineralization of the Qilian Mountain
李向民 1余吉远 1王国强 1黄博涛 1武鹏1
作者信息
- 1. 中国地质调查局造山带地质研究中心/西安地质调查中心,陕西西安710054;国土资源部岩浆作用成矿与找矿重点实验室/西安地质调查中心,陕西西安710054
- 折叠
摘要
祁连山造山带新元古代—早古生代是板块构造演化与成矿的最重要时段,铁、铜多金属矿产资源丰富,成矿作用与新元古代—早古生代火山作用密切相关.根据矿床产出构造位置,将祁连山铁、铜多金属矿床分为4类:大陆裂谷型铁(铜)矿床、岛弧-岛弧裂谷型铜多金属矿床、陆缘裂谷型铜多金属矿床、扩张脊型铜矿床.镜铁山铁(铜)型矿床是新元古代大陆裂谷火山作用过程中热水沉积作用的产物;东沟铜矿为晚寒武世大洋扩张脊火山作用的产物;白银矿田铜多属矿床是奥陶纪与岛弧-岛弧裂谷火山作用的产物;石居里铜矿是晚奥陶纪弧后扩张脊有关火山作用的产物;红沟铜矿则是晚奥陶世陆缘裂谷火山作用的产物.
Abstract
The most important period of tectonic evolution and mineralization in the Qilian orogenic belt is Late Neoproterozoic to Early Paleozoic. There are abundant iron-copper polymetallic ore deposits and they are closely related to the volcanism. According to the plate tectonic setting,the iron-copper polymetallic ore deposits can be grouped into four types:continental rift,island arc-is-land arc rift,continental margin rift and spreading ridge.The Jingtieshan-type iron-copper deposit was formed in the hot-water sedi-mentary mineralization of the volcanism in Late Neoproterozoic;the Donggou copper deposit was formed in an oceanic mid-ridge environment in Late Cambrian; the Baiyin orefield and the Qingshuigou-Bailiugou orefield were formed by the hot brine convec-tion and circulation related to the island arc-island arc rift volcanism during the Cambrian-Ordovician; the Shijuli copper deposit was formed in the back-arc spreading ridge in Late Ordovician;and the Honggou copper deposit was formed in a continental margin rift environment in Late Ordovician.
关键词
新元古代—早古生代/火山作用/构造演化/祁连山Key words
Late Neoproterozoic to Early Paleozoic/volcanism/tectonic evolution/Qilian Mountain引用本文复制引用
基金项目
中国地质调查局项目(DD20160012)
出版年
2018
国家科技期刊平台
NSTL
万方数据