摘要
以往人们对兰坪盆地铅锌多金属矿床成因的研究 ,大多侧重于对古地下水成矿作用和热水沉积改造作用探索 ,而忽视了盆地内构造 -岩浆活动对该区多金属成矿作用的贡献。本文重点研究了兰坪盆地及邻区喜山期岩浆岩的微量元素地球化学特征 。
Lanping basin lies between Lancangjiang fault and Jinshajiang fault. Himalayan movement is the important tectonic event, during which the act ivity of mid-alkali magma is strong. Previous work focused on studying porphyry copper, lead, zinc polymetallic ore deposits in this area and ignored the rel ationship between Himalayan tectonomagmatic movement and polymetallic mineraliza tion in the basin. The tectonomagmatic movement occurred at the same time as lea d zinc polymetallic mineralization, that is, Himalayan period. Magma activity an d mineralization is controlled by the same faults in Lanping basin and its adjac ent area. Magmatic rocks and ore rocks have similar pattern of REE, and have high contents of Th, Cr, Co, Ni. These characteristics of elemental geochemistr y reveal the basic relationship between magmatic movement and mineralization.
出处
《矿物岩石》
CAS
CSCD
北大核心
2000年第2期35-39,共5页
Mineralogy and Petrology
基金
国家攀登项目!( 95 -预 -3 9-0 3 -0 3 )
国家自然科学基金项目!( 4 9873 0 2 0 )
教育部跨世纪优秀人才基金
关键词
喜山期
构造-岩浆活动
流体成矿
兰坪盆地
Himalayan tectonomagmatic activity
trace element geochemistry
fluid minera lization
Lanping basin
