金矿床密集区形成的基本条件—以华北地台为例

来源 :前寒武纪研究进展 | 被引量 : 0次 | 上传用户:susan002
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
金矿床密集区受含金丰度高的岩石圈地幔区控制和制约。本文以华北地台若干金矿床密集区为例,从地壳演化的角度,初步探索了初始地壳的含金丰度变化与金矿床密集区的关系。文章认为,初始地壳只有经活化改造和活化再造,才能形成金元素的富集域或金矿床密集区。金矿床密集区的形成是矿源、热源、搬运介质和构造条件的统一体。其中,前寒武纪古老变质基底是金矿形成的物质基础,变质基底双层结构的下层结构是金矿床的主要赋存部位,岩浆一热构造作用是初始地壳内成矿物质活化的动力,岩浆活动、流体运移是矿质的搬运工具,构造断裂是含矿热液运移的通道和聚集的空间,特别是深断裂能使深源成矿物质迁移至地壳,使矿质来源更加丰富。 The gold deposits are controlled and restricted by the lithospheric mantle area with high gold abundance. In this paper, taking several gold deposits in the North China Platform as an example, the relationship between the gold abundance in the initial crust and the gold deposits is preliminary explored from the perspective of crustal evolution. The article believes that the initial crust can be formed only gold-rich areas or gold-rich areas only through activation transformation and reactivation. The formation of the gold deposits is a unified source of ore, heat, transport media and structural conditions. Among them, the ancient Precambrian metamorphic basement is the material basis for the formation of gold deposits. The underlying structure of the metamorphic basement double layer structure is the main deposit of gold deposits. The magmatic-thermal tectonism is the motivation for the activation of ore-forming materials in the initial crust. Magmatic activity and fluid migration are the tools of transporting minerals. Tectonic fault is the passage and accumulation space for ore-bearing hydrothermal migration. Deep fractures in particular can migrate deep-sourced ore-forming materials to the earth’s crust and enrich the mineral sources.
其他文献
Rapid electron transfer from electron adduct and reducing OH adduct of 2’-deoxyadenosine-5’-monophosphate acid (dAMP) to riboflavin (RF) and flavin adenine d
In this paper, benzene adsorption isotherm and their hysteresis on two important local diatomites were determined at 25℃, and their silicon hydroxyl group (Si
A new approach to generating supramolecular architectures,based on easy-to-prepare schiff base ligands,is described together with its application to the self-a
A trinuclear linear Mo-Fe-Mo dialkyldithiocarbamate complex [Et4N] { [ Me2dtcMoO (μ-S)2 ]2Fe} has been obtained and structurally characterized, which contains
This article only deals with the topic of intense interest to us and to a considerable extent of our own experimental results on the synthesis,characterization
小儿脐突,症见小儿脐部呈半球状或囊状突起,虚大光厚,以指按之,肿物可推回腹内,因啼哭过多或剧烈咳嗽等因素又可复突出,本病属现代医学脐店范畴。我们应用中药外敷法治疗本病6例,疗
The chemically induced dynamic electron polarization (CIDEP) of the triplet molecule/triplet quencher/2,2,6,6-te-tramethyl-1-piperidinyloxyl (TEMPO) systems we
纵观国内外汽车厂商,混合动力是几乎每一个生产商都在热捧的发展新方向,随着技术的逐步完善,近几年涌现街头的混合动力车型不在少数,这其中既有“亲民”的小排量,也有高帅富
中国传统文化为当代影视创作提供丰富的精神滋养和丰富的材料资源;当代影视是中国传统文化传播的重要载体;两者相得益彰,相辅相成。深刻地理解中国传统文化与当代影视创作的
采用酶联免疫吸附法检测血清抗巨细胞病毒(CMV)IgM和抗CMV·IgG,应用原位杂交法检测尿CMV—DVA证实为CMV肝炎患儿40例,用同种方法检测患儿母亲40例,结果80%患儿母亲CMV标志物