• 责任者：Meng Qingpeng (Key Laboratory of Orogenic Belts and Crustal Evolution ; Ministry of Education ; School of Earth and Space Sciences ; Peking University ; Beijing 100871 ; China) ; He Yuankai
• 刊名：Geological Bulletin of China
• 出版年：2013
• 卷期：32(11)
• 关键词：板块碰撞 ; plate collision ; S型花岗岩 ; S-type granite ; 华北板块 ; North China Plate
• 页码：p.1749-1759
• 图表：6 illus., 2 tables, 87 refs.
• 分类号：0300
• issnNo：ISSN1671-2552
• isbnNo：CN11-4648/P

     Xihouhaozi pluton is located in the north of Siziwang Qi area, northern North China Craton. Cameca IMS-1280- SIMS zircon U-Pb dating indicates that it was emplaced at 266Ma＋2Ma. Monzogranite, as the dominant composition, has abundant large-size muscovites. Geochemical analyses show that the pluton is characterized by high SiO2 （75.21%-76.69%）, A/CNK ratios （mostly〉l.1） and normative corundum abundances （mostly〉l%）. Furthermore, the Xihouhaozi granite displays strong negative Eu anomalies （~Eu=0.03-0.11）, striking Ba, Nb, Sr and Ti depletions, and slight Cs, Rb, Th and Pb enrichments. It presents a spec- tacular M-type tetrad effect in the P,.EE distribution patterns as well as non-CHAIkAC （charge-and-radius-controlled） trace element behavior. Tectonic discrimination diagram shows that the pluton might have been formed in a syn-collisional tectonic setting. In combination with regional geology, the authors hold that the Xihonhaozi granite belongs to highly fractionated peraluminous S-type granite and was generated during the continent-continent collision in the late Permian period. During 270-260Ma, a synconllisional granitic belt was formed in Siziwangqi area, which constrained the closure of the Solonker suture of the North China Craton with southern Mongolia in the late Pemaian period.