矿物成分标型继承性与金矿矿质来源

本文在阐述胶东金矿成矿过程的基础上，重点研究了胶东地区不同地质体组成矿物中Ｃｒ元素分布特征及含Ｃｒ矿物的自然演化历史。揭示了含Ｃｒ矿物成分标型显著的继承性规律。胶东金矿脉石矿物中出现翠绿色含Ｃｒ绢云母，矿石矿物中出现含Ｃｒ金银矿至自然金矿物系列。其中的Ｃｒ，均是从以中基性变质火山岩为主的胶东群部分重熔所形成的Ⅰ型花岗岩类，经动力及热液蚀变释放出来的。故利用Ｃｒ元素这一示踪性特征，便可有效地揭示与Ｃｒ相伴相随的Ａｕ（也包括Ｆｅ）来源于胶东群地层。提出开展不同作用、不同时期、不同阶段中含Ｃｒ矿物成分标型的系统研究，可为探讨金矿成矿物质来源提供新的矿物学方法。

CHEMICAL INHERITANCE OF MINERAL TYPOMORPHISM AND SOURCE OF GOLD

This paper discusses the process of gold mineralization with emphasis on thecharacteristics of Cr distribution in minerals and the natural evolution of Cr-bearing miner-als from different geologic bodies in the Jiaodong region, and reveals the regularities of thechemical inheritance of Cr-bearing mineral typomorphism. Cr-bearing sercite and (Au, Ag) series minerals occur in orebodies of the gold deposits,The chromium in these mineralswere derived from the I-type granites through dynamic and hydrothermal alterations.These graintes were originated from partial melting of the Archaean Jiaodong group con-sisting of intermediate basic metavolcanics. The characteristics of chromium being the trac-er element can be successfully used to reveal the source of gold (as well as Fe) which is as-sociated with chromium and,therefore,originated from the Jiaodong group.A systematicstudy on the compositionaI typomorphism of Cr-bearing minerals formed under mecha-nisms at different periods and stages can be a new mineralogical method of exploring thesource of ore-forming materials of the gold mineralization.