Problem of Ore-Bearing Rock Body and Ore-Forming Mother Rock
详细信息
- 责任者：Zhang Qi (Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Beijing 100029 ; China)
- 刊名：Gansu Geology
- 出版年：2013
- 卷期：22(1)
- 关键词：原岩 ; protolith ; 含矿建造 ; ore-bearing formations
- 页码：p.1-17
- 图表：illus., 20 refs.
- 分类号：1001
- issnNo：ISSN1004-4116
- isbnNo：CN 62-1191/P
摘要
Academic circles usually think,rock body divided into ore-bearing rock body and ore-forming mother rock body.The ore-bearing rock body and hydrothermal deposits are closely related in space,time and genesis.Ore-bearing hydrothermal and ore-bearing metal are produced from the magma in the late magmatic differentiation.It belongs to post-magmatic deposits.Our studies show that granitic rock body and mineralization in time and space may be related,but,it is not possible in genesis,and the ore-bearing rock body is not the source rock.The ore-bearing rock body is essentially a binary concept,is the product of rock body plus alteration.The granitic magma and hydrothermal are two different systems.The water and metal elements that the mineralization needed come not from ore-bearing rock body but from the lower crust deep;the ore-bearing rock body itself water and mineralization element is not from magma,but also from deep.The ore-bearing rock body substantially equivalent to metallogenic surrounding rock,but the surrounding rock is not the sedimentary rock and metamorphic rock but granite.Practice shows that distinguishing ore-bearing rock body and ore-forming mother rock body is theorized,not scientific,from the method,it is very difficult,from the ore-prospecting practice,it is unprofitable.The author points out although ore-bearing rock body exists the above,but,including ore-bearing rock body after all is a fact,the term is still can use,however,we should recognize the ore-bearing rock body problem,and give it a new meaning.