兰坪金顶铅锌矿床泥底辟流体成矿特征初探  

A tentative discussion on mud diapiric fluid metallogenic characteristics of Jinding lead-zinc deposit in Lanping

作　　者：张峰[1] 唐菊兴[2] 范小华[2] 陈洪德[1] 陈生华[3] 陈文彬[4] 王成辉[2] 解惠[1] 

机构地区：[1]成都理工大学沉积地质研究院,四川成都610059 [2]中国地质科学院矿产资源研究所,北京100037 [3]中国科学院地球化学研究所(贵阳)环境地球化学国家重点实验室,贵州贵阳550002 [4]中国地质大学,北京100083

出　　处：《矿床地质》2010年第2期361-370,共10页Mineral Deposits

基　　金：国家重点基础发展规划"973"项目(编号:2002CB412607);中国地质调查局国土资源大调查项目(编号:1212010530605)资助

摘　　要：兰坪金顶铅锌矿床的成矿过程与油气的生成有许多相似之处,泥底辟构造在金顶铅锌矿床的成矿过程中起着极为重要的作用。首先,随着泥底辟的上侵,塑性泥流夹带大量气体到构造圈闭中释放压力,扩大成矿空间;其次,流体的去气作用在构造圈闭中进行一系列的强改造活动,进而促使铅锌矿体的形成。文章通过对金顶铅锌矿床形成有关的泥底辟流体的来源、流体形成原因、流体在张性-挤压走滑盆地阶段的演化及金顶铅锌矿床成矿的泥底辟流体特征的分析,认为兰坪金顶铅锌矿床的形成与泥底辟构造密切相关,该矿床具泥底辟流体的成矿特征。The Jinding lead-zinc deposit in Lanping is genetically quite similar to the oil-gas reservoir,i.e., the mud diapiric structure played an important role in the metallogenic process of the Jinding lead-zinc deposit.First of all,with the upward invasion of mud diapir, a large quantity of gas in the plastic mud flow released pressure when it entered structural traps, thus expanding the space of mineralization.Second, fluids with the degassing effect caused a series of transformation events in the structural traps, thus contributing to the formation of lead-zinc ore bodies. The authors analyzed the source of the mud diapiric fluid, the formation of the fluids, and the mud diapiric fluid metallogenic characteristics of the Jinding lead-zinc deposit. On such a basis, it is believed that the Jinding lead-zinc deposit is closely related to the mud diapiric structure and that this ore deposit has mud dispiric fluid metallogenic characteristics.

关 键 词：地质学 泥底辟 流体 兰坪金顶铅锌矿床 

分 类 号：P618.130.1[天文地球—矿床学]