超大型矿床研究中某些问题的讨论及找矿

超大型矿床，一般指单个矿床中规模达超大型者。若将矿田内多个矿床，合称超大型矿床，则与矿床和矿田定义不符，应研究统一术语。超大型矿床划分标准，应便于全球对比和简单易行。提出一个以Ｐ．Ｌａｚｎｉｃｋａ和涂光炽的划分标准为基础的综合方案，在统一标准以前供同行研究时参考。超大型矿床分布形式，分点式、带式及首领式。后者为找矿重点。关于超大型矿床成矿流体特征、控矿因素和找矿问题，以某些金矿为例作了初步研究。未发现任何独特的成矿流体。这类矿床的形成受多因素控制，具多因复成矿床特点。综合运用多种找矿方法与手段，但有侧重，是适宜的。

DISCUSSION ABOUT SOME PROBLEMS IN STUDIES OF SUPERLARGE ORE DEPOSITS AND PROSPECTING

The superlarge ore deposit generally means a deposit with a reserve scale up to a superlarge ore deposit. Sometimes, the deposits from an ore field, even several ore fields, are called a superlarge ore deposit. It does not conform to the definition of the ore deposit and ore field. The problem mentioned above sould be discussed for the sake of the term's consistency. For the comparison of the materials world wide, the differentiating standard for superlarge ore deposits should be simple and convenient. A comprehensive scheme differentiating the superlarge ore deposits has been suggested for discussion on the basis of P. Laznicka's and Tu Guanzhi's principles, for they are simple and practical. The distribution of superlarge ore deposits could be divided into 3 types: point type, banded type and leader type. The last one is the most important for the prospecting of some metallic ore deposits. The preliminary study of the characteristics of ore forming fluids, the controlling factors for the formation and the prospecting of superlarge ore deposits has been exemplified by some gold ore deposits. The research of fluid inclusions obtained from minerals indicates that there is no significant difference between the superlarge and large, middle or small Au quartz deposits in ore forming fluids. It seems that there is no any unique ore forming fluid to form the superlarge gold deposit. Generally speaking, some superlarge ore deposits are polygenetic and compound ore deposits. A comprehensive application of many methods and technics is suitable, although one of them may be the most important and useful.