|
本帖最后由 老马居士 于 2013-4-28 10:50 编辑
课 件 名:Global tectonics and gold deposits(板块构造与金矿床)
作 者:Jonathan Law
日 期:2009
单 位:VIEPS 维多利亚地球与行星科学学院
格 式:ppt
片 数:69
附 件:9
内容简介:
Plate tectonic framework(格局):What can tectonics deliver(传递)? Dehydration(脱水) and melting(熔融);Magmatic processes;Fluid sources:1 – structurally controlled、2 – met devolatilization(液化作用)、3 – thermal convection(热对流)、4 – magmatic fluid exsolution(脱溶,出溶作用)、5 – topography(地势,地形学)、6 – basinal(盆地的) flow(流动)、7/8 – slab(厚板,厚块) devolatilization、9 - mantle wedge(地幔楔) dehydration;Preservation(保存,保留);Crustal(地壳的) environments;Magmatic vs hydrothermal(热液的,热水的);Time distribution(分布);Super continent’ (超级大陆)cycle(循环,周期);
Lode(矿脉) / greenstone(绿岩) / shear(剪切) / mesothermal(中温的) / slate(板岩) / orogenic (造山的)【WA(华盛顿), Victoria(维多利亚)】:‘Super continent’ cycle;The Pacific Rim (太平洋沿岸地区,泛太平洋)- today;The pacific rim and gold deposits;The youngest deposits;Fluid sources;Paleozoic(古生代的) tectonic setting(环境,背景);Subduction (俯冲)processes;Continental (大陆的)processes(过程,进程);Role of(……的角色) pore fluid (孔隙流体)pressure and storage(存储,储存);Fluid storage;Yilgarn gold distribution(分布,分配);Wiluna-Norseman evolution(进化,演变);Kalgoorlie region(地区) - seismics(地震探测法);Kalgoorlie seismic interpretation(地震解释);Exploration implications(含义,卷入);Eastern Australia;Victoria –Lachlan Orogen(造山带);Victoria – 430Ma。
Magmatic(岩浆的) gold (porphyries(斑岩), skarn(矽卡岩), epithermal(低温的,浅成热液的), IOCG(U)【铁氧化物铜金型(铀)】, etc):Epithermal deposits;Porphyry deposits;Emplacement mechanisms(侵位机制);Controls;Metallogenic(成矿的) relationships(关系)。IOCG(U):Andean【安第斯山 (脉的)】IOCG,
Basin (盆地)hosted(寄住,主持) gold:Tanami(塔纳米沙漠);Carlin(卡林):Geophysical setting;Basement(地下室,基底?) configuration(结构,构型);Carlin – 15% shortening;Alternative(交替的,非主流) fluid sources。Witwatersrand:The Wits: a Mesothermal Connection? Peripheral(外围的,次要的) orogenic setting、Late Archean age(太古代)、C and Fe association(联合,联想)、Quartz veining(脉,使有纹理)、Fluid characteristics、Low salinity(盐)、Low silver (银)and base metals(贱金属)、T > 300 C;Orogenic gold Placers(砂矿床);Gold deposit settings;Linking hydrothermal(热液的) gold systems?
目录:
Plate tectonic framework
Lode / greenstone / shear / mesothermal / slate / orogenic (WA, Victoria)
Magmatic gold (porphyries, skarn, epithermal, IOCG(U), etc)
Basin hosted gold
– Witwatersrand
– Carlin
|
|