摘要
铜官山铜-铁-金-硫矿床发育上部层状矿体和下部网脉状矿体,地球化学特征呈现出明显的垂向变化和二元结构性。从下部网脉状矿化岩石到上部层状矿石,CaO、MgO、Fe2O3、FeO等含量和δ18O值总体逐渐增高,SiO2、Al2O3、TiO2、K2O、Na2O、REE等含量和流体包裹体温度(341.9℃→178.0℃)及δ34S值总体逐渐降低。黄铁矿δ34S值为(+2.1^+7.9)‰,上部层状块状矿石中方解石和石英δ18O平均值为+13.9‰,下部网脉状矿化岩(矿)石中脉石英或全岩δ18O平均值为+11.7‰。
The geochemical features of the Tongguanshan Cu-Fe-Au-S deposit were presented by a vertical change and a ＂binary texture＂, composed of the upper stratiform ore beds and the lower disseminated-veinlet mineralized rocks （ores）. The contents of CaO, MgO, Fe2O3 and FeO, and the average value of δ^18O increased progressively from the lower disseminated-veinlet mineralized rocks （ores） to the upper stratiform ore beds, accompanied with the contents of SiO2 , Al2O3 ,TiO2 , K2 O, Na2O and REE, the measured temperatures （from 341.9 ℃ to 178. 0 ℃ ） of fluid inclusions and δ^34S values decreasing gradually. The δ^34S values of pyrite ranged from ＋2. 1‰ to ＋7. 9‰. The average δ^18O value of calcite and quartz in the upper stratiform ore was ＋ 13.9‰, and the relevant value of quartz and whole rock in the lower disseminated-veinlet mineralized rocks（ores） being ＋ 11.7‰. The geological-geochemical features showed that the Tongguanshan Cu-Fe-Au-S deposit should be of submarine sedimentary exhalative origin.
出处
《地质科学》
CAS
CSCD
北大核心
2008年第2期370-376,共7页
Chinese Journal of Geology(Scientia Geologica Sinica)
