地质学报（英文版）2003，Vol.77Issue(4)：522-536,15.
Cascaded Evolution of Mantle Plumes and Metallogenesis of Core- and Mantle-derived Elements
Cascaded Evolution of Mantle Plumes and Metallogenesis of Core- and Mantle-derived Elements
摘要
Abstract
Mineral deposits are unevenly distributed in the Earth's crust, which is closely related to the formation andevolution of the Earth. In the early history of the Earth, controlled by the gravitational contraction and thermal expansion,lighter elements, such as radioactive, halogen-family, rare and rare earth elements and alkali metals. migrated upwards;whereas heavier elements, such as iron-family and platinum-family elements, base metals and noble metals, had atendency of sinking to the Earth's core, so that the elements iron, nickel, gold and silver are mainly concentrated in theEarth's core. However, during the formation of the stratified structure of the Earth, the existence of temperature, pressureand viscosity differences inside and outside the Earth resulted in vertical material movement manifested mainly bycascaded evolution of mantle plumes in the Earth. The stratifications and vertical movement of the Earth wereinterdependent and constituted the motive force of the mantle-core movement. The cascaded evolution of mantle plumesopens the passageways for the migration of deep-seated ore-forming material, and thus elements such as gold and silverconcentrated in the core and on the core-mantle boundary migrate as the gaseous state together with the hot material flowof mantle plumes against the gravitational force through the passageways to the lithosphere, then migrate as the mixed gas-liquid state to the near-surface level and finally are concentrated in favorable structural expansion zones, forming mineraldeposits. This is possibly the important metallogenic mechanism for gold, silver, lead, zinc, copper and other manyelements. Take for example the NE-plunging crown of the Fuping mantle-branch structure, the paper analyzes ductile-brittle shear zone-type gold fields (Weijiayu) at the core of the magmatic-metamorphic complex, principal detachment-type gold fields (Shangmingyu) and hanging-wall cover fissure-vein-type lead-zinc polymetallic ore fields (Lianbaling)and further briefly analyzes the source of ore-forming material and constructs an ore-forming and -controlling model.关键词
mantle plume/mantle-branch structure/antigravitational migration/metallogenesis/Taihang MountainsKey words
mantle plume/mantle-branch structure/antigravitational migration/metallogenesis/Taihang Mountains分类
天文与地球科学引用本文复制引用
NIU Shuyin,HOU Quanlin,HOU Zengqian,SUN Aiqun,WANG Baode,LI Hongyang,XU Chuanshi..Cascaded Evolution of Mantle Plumes and Metallogenesis of Core- and Mantle-derived Elements[J].地质学报（英文版）,2003,77(4):522-536,15.基金项目
This research was performed as part of the project supported by the National Natural Science Foundation of China (grant 40272088), Knowledge Innovation Project of the Chinese Academy of Sciences (KZCX1-07) and the Program of Financially Aiding Backbone Te （grant 40272088）
