摘要
上芒岗金矿床分为两部分:红色粘土型金矿和卡林型金矿。这两种类型的金矿都受上芒岗断裂控制,在空间上存在明显的上下叠复关系。红色粘土剖面中As、Hg、Au、Sb、Mo等微量元素表现相似的变化特征,为表生条件下成矿元素组合,这一特征与卡林型金矿的元素特征极为相似;两类型金矿在大离子亲石元素特征和稀土元素特征上具有相似性:两类型金矿的大离子亲石元素分布曲线都表现为富Cs和U、贫Ba和Sr的模式,稀土配分模式表现为轻稀土富集的右倾曲线。红色粘土型金矿形成于上新世,卡林型金矿形成于白垩纪,在成矿时代上有先后顺序关系。
Gold deposits at Shangmanggang can be divided into laterite-type and Carlin type. These two kinds of gold deposits, which overlap each other in space, are controlled by the Shangmanggang fault. As, Hg, Au, Sb and Mo elements have same characteristics in red-clay profile, which is similar to Carlin type gold deposit. These deposits are rich in Cs and U, relatively lack of Ba and Sr. Chondrite standardized modes of REE show that LREE is richer than HREE in both laterite-type and Carlin-type gold deposit. Carlin type gold deposit was formed in the Cretaceous period and laterite-type gold deposit formed in the Pliocene. Mineralizing times of these two type deposits has precedence.
出处
《地质与勘探》
CAS
CSCD
北大核心
2003年第5期26-29,共4页
Geology and Exploration
基金
国家自然科学基金项目(编号:49873021)
中国科学院重大项目(编号:KZ-951-A1-405-02)资助。
关键词
卡林型金矿
红色粘土型金矿
微量元素
稀土元素
上芒岗金矿床
laterite-type gold deposit,Carlin type gold deposit,trace element,REE,Shangmanggang in Western Yunnan province
