摘要
水竹岭铜-铁-金-硫矿床发育上部层状矿体和下部脉状矿体。上部层状矿石重晶石δ34S值为+19.9‰。上部层状矿石黄铁矿δ34S值为+0.9～+5.8‰,下部脉状矿石黄铁矿δ34S值为+3.2～+6.4‰。下部脉状矿体中方解石的δ18O值为+13.3‰,δ13C值为1.2‰,上部层状矿石白云石的δ18O值为+14.1‰,δ13C值为2.2‰。下部脉状矿石和矿化岩石中黄铁矿的206Pb/204Pb、207Pb/204Pb、208Pb/204Pb平均值分别为18.2241、15.5245和38.2289;上部层状矿石中黄铁矿的206Pb/204Pb、207Pb/204Pb、208Pb/204Pb平均值分别为18.0692、15.5020和38.1232。从下部脉状矿石到上部层状矿石,黄铁矿的δ34S值、206Pb/204Pb、207Pb/204Pb、208Pb/204Pb平均值逐渐降低,δ18O值和δ13C值等逐渐增高。地质和同位素地球化学特征反映水竹岭铜-铁-金-硫矿床为海底热水喷流沉积成因,揭示了块状硫化物矿床的二元结构性。
The Shuizhulin Cu-Fe-Au-S deposit is presented by the upper stratiform ore beds and the lower disseminated-veinlet ores.The δ34values of barite in the upper stratiform ore beds ranged from ＋19.9‰.The δ34S values of pyrite in the upper stratiform ore beds ranged from ＋0.9 to ＋5.8‰,that of pyrite in the lower disseminated-veinlet ores＋3.2 to＋6.4‰.The δ18Oof calcite in the lower disseminated-veinlet ores was ＋13.3‰,the δ13C of that being 1.2‰.The δ18O of dolomite in the upper stratiform ore beds was ＋14.1‰,the δ13C of that being 2.2‰.The average 206Pb/204Pb、207Pb/204Pb、208Pb/204Pb of pyrite in the lower disseminated-veinlet ores were 18.2241、15.5245、38.2289 respectively;The average 206Pb/204Pb、207Pb/204Pb、208Pb/204Pb of pyrite in the upper stratiform ore beds were 18.0692、15.5020、38.1232 respectively.The average δ34S、206Pb/204Pb、207Pb/204Pb、208Pb/204Pb of pyrite decrease gradually,with the average δ18O and δ13C increaseing progressively,from the lower disseminated-veinlet ores to the upper stratiform ore beds.The geological-isotope geochemical characteristics show the Shuizhulin Cu-Fe-S-Au deposit is of submarine sedimentary exhalative origin and two-member texture characteristics of the massive sulfide deposits.
出处
《地质与勘探》
CAS
CSCD
北大核心
2010年第1期70-75,共6页
Geology and Exploration
基金
国土资源部科技专项研究项目(B0002-3)资助
作者简介
李红阳（1959年-），男，1998年毕业于中国地质科学院，获矿床学博士学位，教授，博士，现主要从事矿床地质地球化学研究工作。
