摘要
陕西八方山铅锌矿床存在两类密切共生的矿化:富含铅锌的整合层状矿和富含黄铜矿的网脉矿.两种矿化均由海底热液活动一次形成.前者代表矿质沉淀于海底,后者代表矿液补给带.成矿热液来自海水,于同沉积断裂中经循环加热而成.
Two type of mineralization were observed in close relationship in Bafangshang deposit, Shanxi Province i.e. conformable bedded ore-sphalerite-galena chert unit and the underlying stockwork ore taking shape of a blandet and consistiong of quartz-carbonate veins rich in chalcopyrite. Both of them are thought to be produced by sub-marine hydrothermal activity. The bedded ore was precipitated from the ore fluid discharged onto the sea floor whereas the stockwork represents the feeder zone. Such mineralization pattern is similar to Kuroko type in Japan, Sullivan in Canada, Meggen and Rammelsberg in the West Germany. However, no contemporaneous igneous activity has been demonstrated at Bafangshan deposit and in the whole Fengxian-Taibai raea. The submarine hydrothermal activity was probably related to the syndepositional faulting, which controled the sedimentary facies and thickness of Devonian seqence-ore-hosting rock. The δ^(34)S values of sulfides suggest a sea water origin for ore solution, which may be heated by deep convective circulation along the Syn-depositional faults.
出处
《地质找矿论丛》
CAS
CSCD
1989年第1期14-21,共8页
Contributions to Geology and Mineral Resources Research
