摘要
通过矿床地质特征、流体包裹体、氩及氢氧稳定同位素组成的研究，认为马家窑金矿属再平衡岩浆水热液矿床，金青顶和十里铺金矿属大气降水热液矿床。本文作者首次在国内开展氩稳定同位素的研究，成果表明：马家窑金矿的￣（３６）Ａｒ在温度３００℃以下相对含量低于１０％，金青顶和十里铺金矿则高达９０％以上。说明前者以岩浆成因￣（４０）Ａｒ为代表，而后者则以大气成因￣（３６）Ａｒ为代表。示踪研究结果与氢、氧同位素一致，表明氩同位素在示踪成矿流体及矿床成因研究方面也是一种有效的方法。
Based on the study of the geological charecteristics,fluid inclusions and stable isotopecompositions of hydrogen oxygen and argon of the gold deposits in the Jiaodong region , it issuggested that the Majiayao gold deposit belongs to the hydrothermal one fermed fromreequilibrated magmatic water whereas the Jingqingding and Shilipu gold deposits-hydrothermaldeposits deminated by meteoric water.The argen isotope study was carried out for the first time in china by the authors.Therelative amount of ￣(36) Ar for samples from the Majiayao gold deposit is less than ten percent below 300℃while that for samples from the Jingqingding and Shilipu gold deposits-up to ninetypercent.This indicates that in the former deposit the magmatogenic￣(40)Ar is predominated whereasin the latter two deposits the meteoric argon ￣(36)Ar is typical. The results obtained from the argontrace study are in close agreement with those of hyaragen and oxygen isotopes which shews thatthe argon isotope can be an effective methad in tracing ore-forming fluids and studying oregenesis.
出处
《山东地质》
1994年第2期24-33,共10页
Geology of Shandong
