Geochronology, Emplacement Depth and Tectonic Implications of the Mapeng- Chiwawu Granitic Pluton in Fuping Complex of the Taihang Mountains

详细信息   

• 责任者：Li Linlin (Key Laboratory of Orogenic Belts and Crustal Evolution ; Ministry of Education ; School of Earth and Space Sciences ; Peking University ; Beijing 100871 ; China) ; Han Baofu
• 刊名：Acta Petrologica et Mineralogica
• 出版年：2012
• 卷期：31(3)
• 关键词：花岗岩 ; granite ; 铀—铅计时 ; U-Pb dating ; 太行山 ; Taihang Mountains
• 页码：p.289-306
• 图表：10 illus., 4 tables, 42 refs.
• 分类号：0801
• issnNo：ISSN1000-6524
• isbnNo：CN11-1966/P

摘要

///It is known that Mesozoic magmatism generated a series of granitic plutons in the northern segment of the Taihang Mountains. Among others, the Mapeng-Chiwawu pluton just crops out in the central part of the Neoarchean-Paleoproterozoic Fuping complex. The pluton consists of quartz diorite, granodiorite and granite from edge to core, and these intrusions yielded LA-ICP-MS zircon U-Pb ages of (126.4± 2.4) Ma, (125.4 ± 2.0) Ma and (126.2± 2.0) Ma, indicating that the pluton was emplaced in a short time around 126 Ma （Early Cretaceous）. The geochemistry analysis suggests a dome-shaped structure for the Fuping complex before the Early Cretaceous. Combined with other data, an average uplift rate of 0.07~0.08 km/Ma can be obtained for the Taihang Mountains since the Early Cretaceous.