摘要
兰坪-思茅盆地为弧后裂谷盆地,其形成与演化历史可分为裂谷期、地堑期、堑沟期和回返期,盆地分为7个构造-古水文地质期。着重研究了盆地古新世时古水动力场和古水文地球化学场,指出沉积水初始迁移阶段的成矿作用主要是在沉积承压水系统区与渗入木承压水系统之间的过渡层状压力带。特大型兰坪金顶铅锌矿就位于此带上。
Lanping-Simao Basin is a back-are rift basin. It can be divided into rift stage,graben stage and return stage from its history or formation and evolution. It is divided intoseven structure-palcohydrogcology periods. The ancient hydrodynamic field andpaleohydrogeochemical field in Palaeocene are studied. It is pointed out that minerogenesisoccurring during the initial transportation stage of sedimentary water took place at the tran-sition stratified zone between system or sedimentary confined water and system ofseepage pressure water. Extremely big Jinding Lead-Zine Deposit in Lanping also lies inthis zone.
基金
本文系国家自然科学基金"云南省兰坪金顶铅锌矿形成的古水文地质条件研究"的阶段成果之一
关键词
盆地
构造
古水文地质
成矿
basin
struetural-palcohydrogeological condition
rift
ancient hydrodynamic field
palcohydrogeochemical field
minerogenesis
