排序方式： 共有3条查询结果，搜索用时 0 毫秒
1
1.
Some typical examples illustrating the tenor contraction of such metallic ore veins or bodies as Au, Pb, Zn, W, Sn, Ta and Nb have been recorded by Chinese geologists in the course of ore exploration and mining. The similar demonstrations have also been observed in Japan, Peru and the U.S.S.R. by their respective geologists. Yet its origin as a problem in the field of ore deposits remains unsolved. In this paper, by adopting the photon-based chemical thermodynamical method proposed by the author, the gravitational field position Z related to the intensity of the diffusion force of ore fluids are proved to be the leading factor causing the tenor contraction of metallic veins or bodies. The tenor contraction of metallic veins or bodies under suitable ore-controlling structural conditions is an objective fact in the science of ore deposits, though in no case should it be regarded as a rule to deny the necessity of searching for ore at depth. The variation of the deep-seated ore-controlling structures might alter the tenor of the metallic veins or bodies. The Taipushi wolframite deposits in Nei Monggol could be taken as a convincing example. The tungsten content increases at great depth owin,g to the dilatation during ore deposition along the schistosity of the Proterozoic crystalline schists. There also have been observed similar phenomena in other deposits of China. 相似文献
2.
我国主要硫矿床类型及成矿若干规律 总被引：1，自引：0，他引：1
我国硫矿资源丰富多采,有自然硫、硫化氢、硫铁矿、石膏、明矾石等。对于这些矿产中的主要矿床类型地质特征总结归纳,显然将有助于提高地质理论水平和扩大找矿远景。成矿规律是成矿地质条件的全面反映,矿质来源则为成矿地质的前提和物质基础。本文拟从物质来源探索出发,提出以下硫矿床的分类方案。 相似文献
3.
试论我国华北某高硫化氢气藏 总被引：1，自引：0，他引：1
一、前言我国已知酸性天然气田多分布于扬子准地台西部,产层为震旦系、三叠系和侏罗系,硫化氢含量均在10％以下,其他地区尚未见有任何报导。近来,华北石油会战指挥部在华北某地发现了一处高硫化氢气藏,这对开辟我国新硫源是一项重要贡献。美国、加拿大、法国、苏联都是从酸性天然气中回收硫磺的主要国家,但目前开发中的气田硫化氢含量一般均在20—30％。从1980年的实际状况看,加拿大的Harmattan气田,其硫化氢含量为52—53.4％;美国Thomasville气田硫化氢含量为27—46％;西德Grossentne 相似文献
1