摘要
银洞沟Au-Ag-Pb-Zn矿床围岩蚀变强烈,分布广泛,同矿化关系密切.蚀变以硅化为主,次为黄铁矿化和铁白云石化,局部有绢(白)云母化和绿泥石化,蚀变具分带性.围岩蚀变除引起常量元素(Si、Al、K、Na、Ca……)的地球化学迁移外,还造成成矿元素(Au、Ag、Pb、Zn)的强烈富集.围岩蚀变过程中,稀土元素表现出明显的活动性;伴随蚀变的发生,稀土总量降低,LREE/HREE变小,这说明围岩蚀变引起稀土元素的移出,且LREE的迁出量远大于HREE的迁出量.
There are widespread and intense alterations of wall rocks of Yindonggou Au-Ag-Pb-Zn deposit, and the alterations have close relation to the mineralization of gold and silver. The predominant alteration is silification, then are pyritization and ankeritization, local are chloritization and sericitization. There are obviously zonation of alteration in the deposit.
The alterations can not only cause the geochemical migration of major elements (Si, Al, Na, K, Ca, Mg…), but also can result in the intense enrichment of elements (Au, Ag, Pb, Zn). In the process of alteration, the Rare Earth Elements (REE) are very active, and total REEand LREE/HREE become lower, which demonstrae that the alterations can cause REE transportation, and, the transport ability of LREE is greatre than that of HREE.
出处
《地质找矿论丛》
CAS
CSCD
1993年第2期16-25,共10页
Contributions to Geology and Mineral Resources Research
