Late Cenozoic Tectonics and metallic mineralization in western Pacific rim

摘要：

Compilation of tectonic regimes,magmatism and metallic mineralization in the Late Cenozoic western Pacific magmatic arcs indicate that porphyry Cu-Au and high-sulfidation epithermal Au deposits form in the provinces of contraction. In the collision settings, these mineral deposits form prior to the final collision of exotic blocks, associated with calc-alkaline intrusive magmatism. In contrast, Kuroko and lowsulfidation epithermal Au deposits form in the province of active extension, represented by rift graben formation, shift of volcanic fronts towards the trench and bimodal volcanism of tholeiitic basalt and rhyolite. These contrasting tectonic regimes are realized either by shallowing or steepening of the subduction slabs. This indicates that dynamic tectonic processes are important to form large deposits as well as to determine deposit types.

关键词： Late Cenozoic tectonics mineralization porphyry Cu epithermal Au Kuroko

作者: Yasushi Watanabe

作者单位: Institute for Geo-Resources and Environment, AIST, Higashi 1-1-1, Tsukuba 305-8567, Japan

会议类型: 国际会议

会议名称: 第八届国际矿床地质会议(Proceedings of the Eighth Biennial SGA Meeting)

会议地点: 北京

会议语种:英文

页码: 6-9

在线出版日期: 2005-08-18（万方平台首次上网日期，不代表论文的发表时间）