摘要
本文综合了东沟坝矿床地质特征,结合硫、氢、氧、碳稳定同位素,硫、氧、二氧化碳逸度及包体测温,天然热发光,热电系数等测定结果,分析了成矿物理化学条件和环境;计算了单阶段铅同位素模式年龄(858—1042Ma,相当于青白口纪);划分了成矿阶段,建立了成矿模式,总结了找矿标志及找矿方向。矿床成因类型属火山沉积—受变质矿床。
On the basis of studies of the geological features of the Donggouba poly- metallic deposit,the measured results of the stable isotopes of sulfur, hydrogen,oxygen and carbon,the fugacity data from sulfur,hydrogen, oxygen and carbon dioxide,the inclusion thermometry,the natural-heat luminosity and the coefficients of pyroelectrcity,the writers analyzed the geochemical conditions and the environments for metallization,calculated the model age of lead isotope in a single phase (858—1042 Ma,correspon- ding to the Qingbaikou Period),divided the metallogenetic phases,set up the metallogenetic model and showed the indication and direction of ores in this area. In the view of the previous studies,it is reasonable to assume a volc- ano-sedimentary-metamorphosed origin for the metallization of the Donggouba polymetallic deposit.
出处
《陕西地质》
1990年第A02期1-13,共13页
Geology of Shaanxi
