Addressing ore formation and exploration

作     者：Jean-Louis Vigneresse 

作者机构：GéoRessourcesUMR 7339Université de Lorraine 

出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)

年 卷 期：2019年第10卷第4期

页      面：1613-1622页

核心收录：

学科分类：07[理学] 

基　　金：financial support from CREGU Nancy.A6 months stay at the AIST Tsukuba Japan with Sunsho Ishihara was the introduction to link granites and ores 

主　　题：Porphyry ore deposits Metals concentration processes Exploration Alteration pattern 

摘      要：Common base and noble metals represent an important economic factor in the actual industrial *** instance the world resources for copper are actually estimated for about the next 30 years *** situation requires rethinking the way major ore deposits form,leading to new guides for *** present paper briefly examines the processes leading to ore formation,in relation with granitic or granodioritic *** identifies the importance of metal enrichment during the magmatic *** the magma chamber that forms porphyry intrusions,metals may incorporate to first formed crystals,becoming inert;concentrate into the residual melt of a mush;or segregate by diffusion into the exsolved magmatic volatile phase(MVP)into which they are transported and precipitated.A competition results between elements partitioning and ***,a specific Peclet number for each metal(Cu,Au,Ag,Mo,W,Sn,and REE)controls the ratio between the diffusive and the advective *** diffusivity in the melt shows differential behavior relative to a threshold of about10 13 m2/*** with slower diffusivity values(***)will not ***,fast diffusive metals(Au,Ag,Cu)may rapidly incorporate the MVP,provided an adequate component(halogens or S)is attractive for *** chemistry of the MVP escaping the magma induces different alteration *** relative content in F,Cl or S,attested by the composition of biotites and apatites,links with the preferential content of metals in o re deposits,representing a valuable tool for *** the model is replaced in a set of coupled mechanical-chemical instabilities,within a three phase material.