【摘要】 中—新元古代,全球发生了重大的Rodinia超大陆地质事件。近年研究表明,中国在华南板块发生的晋宁造山运动是Rodinia事件的重要组成部分。大量研究数据显示,康滇地轴前寒武纪地层中所形成的金属矿床大多集中在900～700Ma间。这些矿床的形成与大规模基性、酸性岩浆活动密切相关,与晋宁-澄江运动构造-热液作用密切相关,显示构造环境由挤压向拉伸发展,这正是全球Rodinia超大陆由汇聚转变为裂解的重要时期。本文从同位素地质年代学、沉积环境方面探讨该时期的成矿作用对Rodinia事件的响应,铀成矿作用与Rodinia事件的关系。更多还原

【Abstract】 A Major geological event--Rodinia breakup occurred in the Meso-Neoproterozoic period. The recent study shows that the Jinning orogeny in the south China plate was related to the Rodinia breakup. A great amount of geological data indicate that metallic deposits hosted by the Pre-Cambrian on the Kangdian axis were formed 900-700 Ma ago and associated with large-scale basic and acidic magmatism and closely related with tectonic and hydrothermal process during the Jinning-Chengjiang epoch. Tectonic setting where the deposits were formed was an extensional environment which might be correlated to the Rodinia breakup. This paper deals with the response of the above-mentioned mineralization to the Rodinia breakup in terms of isotope geochronology and sedimentary environment.更多还原