| 金的矿源层讨论 |
| |
| 引用本文： | 许静.金的矿源层讨论[J].地质论评,1992,38(4):311-315. |
| |
| 作者姓名： | 许静 |
| |
| 作者单位： | 江西地质矿产调查研究大队 向塘 |
| |
| 摘 要： | 岩层初始含矿丰度包括易释出和难释出两部分矿质,这与现今岩样所测得现存丰度截然有别;特殊的(火山)沉积建造是判别矿源层的综合标志,含矿丰度只是其中一个重要标志,其对比标准以区域背景值更为现实可行。
|
| 关 键 词： | 金矿 金矿 矿源层 含矿丰度 |
THE SOURCE BED OF GOLD |
| |
| Xu Jing Geological and Mineral Resources Investigation Party of Jiangxi Province,Xiangtang.THE SOURCE BED OF GOLD[J].Geological Review,1992,38(4):311-315. |
| |
| Authors: | Xu Jing Geological and Mineral Resources Investigation Party of Jiangxi Province Xiangtang |
| |
| Abstract: | The source bed usually refers to an original stratigraphic horizon from whichsecondary ore minerals were derived. It is mainly represented by a (metamor-phosed) sedimentary fromation with or without syngenetic volcanics. Throughlater actions of geological agents and subsursface hydrothermal fluids, theore substances are believed to be released from the bed and migrate to afavourable site to form relevant deposits. Therefore, the source bed has its limi-tation, i. e. it refers to one (or some) particular kind(s) of ore and has a definitevertical and lateral extent. The gold source bed is a branch of it. The primaryore substance abundace of a rock formation is utterly different from that meas-ured currently in the samples. The former comprises the readily reactive part andthe less reactive part. The readily reactive part tends to be first remobilized andreleaced out of the bed resulting in to a component part of ore through latermineralization. The content of ore substances of the current samples collected inor rear ore district are most probably the product undergone the same geologicaprocesses as the existing ore deposit. In most cases, the figure of major contentrepresents the less reactive part of ore substances. Thus, it is not advisable tomerely discuss the existence of the source bed and its relevant problems bymeans of the existing ore substance content. It is rather practicable for prospectingto integrate the content of ore substane of a bed with the whole special (volcanic)sedimentary formation as the regional background value. |
| |
| Keywords: | gold deposit source bed ore substance abundace |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《地质论评》浏览原始摘要信息 |
| 点击此处可从《地质论评》下载免费的PDF全文 |
|
