摘要
本文根据我国汞(锑)矿带中已发现的数十个金矿床(点)的勘查研发成果,从成矿系列、载金矿物、金的赋存状态、矿化围岩、成矿热液、成矿温度、控矿层位、控矿沉积相、控矿构造及成矿时代等十个方面,较全面地论述了汞(锑)矿带中金矿的成矿规律。其中,有些是其他类型金矿也具有的;而有些则是汞(锑)矿带中金矿所特有的。这些共有的和特有的成矿规律,对探索不同类型金矿的成因或成矿机制、成矿模式,或将有所助益。
According to the data of tens of Au deposits and spots,author has sumed up the ore-forming condition and existing regularity of Au mineralization in Hg ore belt as fallows;
1. Au in Hg ore belts together with.Hg,Sb,As consists of a low temperature ore-forming sequence ;
2. The Au - bearing minerals are mainly arsenopyrite and arsenomarcasite riched in sulphur ;
3. Au exists in form of isomoph and super-microscopic grains; (<0. lu)and a little is contained in organic matter and clay minerals in absorption state ,with rare independent Au mine rals including natural Au,electrum,Hg-bearing natural Au and goldamalgam occasionally 5
4. The mineralized host rocks are all clayey,silty and muddy rocks;
5. The ore - earring fluid derived from sealed thermal brine rather than magma water or down -osmotic meteoric water;
6. The ore -forming temperature is low,not exceeding 200C for Au,150C for Hg ,As,and Sb;
7. The stratabound feature is distinct;
8. Au mineralization is controlled by cartain sedimentary facies,such as slope facies,basin facies and reef facies;
9. Anticlines are the major controlling structure;
10. The mineralization age is late,about from Late Mesozoic to Tertiary
出处
《贵州地质》
1990年第3期187-195,共9页
Guizhou Geology
