Hydrothermal ore deposits in collisional orogens
文献类型：CNKI期刊论文
| 作者 | Yongfei Zheng; Jingwen Mao; Yanjing Chen; Weidong Sun ; Pei Ni; Xiaoyong Yang
|
| 发表日期 | 2019-02-15 |
| 出处 | Science Bulletin
 |
| 关键词 | Ore deposits Hydrothermal fluid Accretionary orogen Collisional orogen Rifting orogen Tectonic reactivation |
| 英文摘要 | Hydrothermal ore deposits at convergent plate boundaries represent extraordinary metal enrichment in the continental crust. They are generally associated with felsic magmatism in extensional settings at high thermal gradients. Although their formation is common during accretionary orogeny, more and more ore deposits have been discovered recently in the collisional orogens of China. Because collisional orogeny was operated in a compressional regime at low thermal gradients, it is not favorable for mobilization of ore-forming elements and thus for the production of hydrothermal ore deposits. Nevertheless, continental collision is generally preceded by oceanic subduction, which enables the preliminary enrichment of ore-forming elements in the mantle wedge due to chemical metasomatism by subducting slab-derived fluids. This gave rise to metal pre-enriched domains in the overriding lithosphere, which may be reactivated by extensional tectonism for hydrothermal mineralization either immediately during accretionary orogeny or at a later time during and after collisional orogeny. It is these tectonic processes that have resulted in the progressive enrichment of ore-forming elements through the geochemical differentiation of the subducting oceanic crust, the metasomatic mantle domains and the mafic juvenile crust, respectively, at different depths. Finally, the reactivation of metal pre-enriched domains by continental rifting in the orogenic lithosphere is the key to the metallogenesis of collisional orogens. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | supported by the Strategic Priority Research Program of Chinese Academy of Sciences (XDB18020303) ; the National Key Basic Research Progam of China (2015CB856100) |
| 卷 | v.64期:03页:67-74 |
| 语种 | 英文; |
| 分类号 | P612 |
| ISSN号 | 2095-9273 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/188639]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.KeyLaboratoryofMetallogenyandMineralAssessment,MinistryofNaturalRescources,InstituteofMineralResources,ChineseAcademyofGeologicalSciences 2.KeyLaboratoryofMarineGeologyandEnvironment,CenterofDeep-SeaResearch,InstituteofOceanology,ChineseAcademyofSciences 3.StateKeyLaboratoryforMineralDepositsResearch,InstituteofGeo-Fluids,SchoolofEarthSciencesandEngineering,NanjingUniversity 4.KeyLaboratoryofCrust-MantleMaterialsandEnvironments,ChineseAcademyofSciences,SchoolofEarthandSpaceSciences,UniversityofScienceandTechnologyofChina 5.KeyLaboratoryofOrogenandCrustalEvolution,MinistryofEducation,SchoolofEarthandSpaceSciences,PekingUniversity |
| 推荐引用方式 GB/T 7714 | Yongfei Zheng,Jingwen Mao,Yanjing Chen,et al. Hydrothermal ore deposits in collisional orogens. 2019. |
入库方式： OAI收割
来源：海洋研究所
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