地质通报2017，Vol.36Issue(12)：2164-2178,15.
巴西巴伊亚圣弗朗西斯科克拉通北部地质构造背景、矿床类型及其成矿作用
Geological-structural background, deposit types and mineralization of S?o Francisco Craton in Bahia, Brazil
摘要
Abstract
This paper aims at establishing a tectonic and temporal framework to characterize the metallogenic processes that made contribution to the formation of the mineral provinces in northern S?o Francisco Craton. Many Archean ore-forming processes which formed resources such as massive sulfide zinc, lead, zinc and copper, besides magnesite talc, iron-titanium-vanadium, iron, chromite and manganese, occurred before the assembly of the craton. Deposits of chromite, nickel, gold and emerald were formed during the Paleoproterozoic orogenic cycle, when the craton was amalgamated into the Atlantic paleocontinent. An extension event occurred during the breakup of Rodinia in the Neoproterozoic, which was associated with deposits of phosphorite and uranium. Kim?berlite diamond and gold mineralization took place during the Brasiliano orogenic cycle, coeval with the amalgamation of West Gondwana. A long-lasting and rather uniform crustal stress happened in this area during the Cambrian period. Resetting of the isoto?pic and magnetic systems that affected the Neoproterozoic sediments of the Irecê Basin at about 520Ma was attributed to the regional fluid migration and mineralization in the aftermath of the Brasiliano orogenic cycle.关键词
圣弗朗西斯科克拉通/地质构造背景矿床类型/成矿作用/巴伊亚/巴西Key words
São Francisco Craton/geological tectonic setting/type of deposit/metallogeny/Bahia/Brazil分类
天文与地球科学引用本文复制引用
徐鸣,姚仲友,沈莽庭,高天山,周延..巴西巴伊亚圣弗朗西斯科克拉通北部地质构造背景、矿床类型及其成矿作用[J].地质通报,2017,36(12):2164-2178,15.基金项目
中国地质调查局项目《海上丝绸之路大洋洲和南美洲矿产资源潜力评价》(编号:DD20160110) （编号:DD20160110）
