摘要
本文从黄铁矿形态、成分和热电性等方面研究了小塔子沟金矿床黄铁矿的标型特征。得出小塔子沟金矿中富矿（矿体）黄铁矿标型特征是：晶体形态复杂且种类多，以立方体、五角十二面体或其聚形晶为主；高Ａｓ，低Ｃｏ，Ｎｉ，Ａｓ／（Ｃｏ＋Ｎｉ）＞１．５；导电类型４种都有且以Ｐ型和Ｎ－Ｐ型为主，Ｖｎｐ＞－１０ｍｖ，α＞－９０μｖ／℃。贫矿（围岩）黄铁矿的标型是：晶形单一为立方体；低Ａｓ；高Ｃｏ，Ｎｉ值；Ａｓ／（Ｃｏ＋Ｎｉ）＜１；导电类型以Ｎ型为主，Ｖｎｐ＜－１０ｍ，α＜－９０μｖ／℃。同时其标型在垂直方向上和水平方向上具有分带性。研究表明，黄铁矿标型可以作为评价地质体含矿性、区别矿体与围岩、判断矿体剥蚀程度以及预测金矿床深部找矿远景的指示标志。
Baced on the morphological feature, composition and pyroelectricity of pyrite,the studies on the typomorphic characteristics of pyrite from Xiaotazigou gold deposit show that in payshoots:1.the crystal shape is complex and various , mainly cube, pyritohedron or its combina-tion;2.As content is high,Co is low, and As/(Co+Ni)>1.5;3. four types of conductance allexist,mainly P-type and N-P-type,Vnp>-10mv,α>-90μV/℃;but in the lean ores(wallrock):1.the crystal shape is only cube;2.As is low,Co and Ni high ,As/(Co+Ni)<1;3.theconductance types are mainly N-type,Vnp<-l0mv,α<-90μV/℃,and its typomorphy iszoning at verticle and horizontal.The typomorphy of pyrite can be used as an indicator markfor evaluating the ore-bearing of a geological body,for distinguishing an ore body and wallrock , for assessing the denudation level of an ore body and for predicting gold deposits indepth.
关键词
金矿床
黄铁矿
晶体形态
成分
标型特征
Gold deposit Pyrite Crystal form Cornposition Pyroelectricity Ty-pomorphic characteristics
