摘要
云南白秧坪银多金属矿床是滇西兰坪盆地内新发现的矿床,属东特提斯 喜马拉雅成矿域的一部分。矿床主要产于下白垩统景星组石英砂岩、粉砂岩中。本文从微量元素地球化学研究入手,与滇西喜马拉雅期富碱岩体相比较,它们具有相同的物质来源区,这种源区被认为是壳 幔物质混合的一种"EMⅡ型"富集地幔源。
The Baiyangping silver polymetallic deposit as a newly discovered deposit in the Lanping Basin, western Yunnan is assigned to part of the eastern Tethys-Himalayas metallogenic domain, and hosted in the quartz sandstone and siltstone of the Lower Cretaceous Jingxing Formation. The comparison of the geochemical signatures of the trace elements from the above-mentioned ore deposit and other Himalayan alkaline rock masses in western Yunnan shows a similar provenance of the ore-forming material, i.e. the mixed crust-mantled 'EM-Ⅱ' type enriched mantle origin.
出处
《沉积与特提斯地质》
CAS
CSCD
2003年第4期103-107,共5页
Sedimentary Geology and Tethyan Geology
基金
国家重点基础研究发展规划项目(G1999043208)
关键词
微量元素
地球化学
银多金属矿床
白秧坪
云南
trace element
geochemistry
silver polymetallic deposit
Baiyangping
Yunnan
