摘要
早元古代后狼山成矿区处于陆缘拉张拗陷阶段，一直延续至晚元古代末期。狼山群合矿岩系中存在的限层变基性火山岩、热水沉积岩和条纹条带状构造、胶状构造均显示狼山成矿区在１８００－９５０Ｍａ期间处于高地热异常的被动大陆边缘。矿体产状、矿石组构、矿石微量元素、稀土元素及硅、硫、碳、氧同位素均表现出热水沉积特点。
The copper-polymetallic ore deposits in Langshan, whose hydrothermal sedimentary and geochemical characteristics is as follows. The three (superlarge) ore deposits occured in passive continental-margin basins by high geothermal field during the Proterozoic period. There are limited interbed of volcanic rocks, hot water rocks and banded, schlieric, gel structure among the Langshan Group and elastic ores. Through detailed studies, including ore bodies feature, ore composition and chemistry of REE, trace elements, silicon and sulfur isotopes, carbon-oxygen isotope composition in the carbonates, it is considered that ore deposits are hydrothermal sedimentary under the same tectonic background.
出处
《西北地质科学》
1997年第2期54-62,共9页
Northwest Geoscience
基金
国家科委"八.五"A-30项目
关键词
华北地区
地台
铜矿床
多金属矿床
热水沉积
Copper-polymetallic deposit Hydrothermal sedimentary Passive continental margin Langshan Inner Mongolia
