Late Archean Continent-Continent Collision Event of Middle Segment of North Margin of North China Plate:Evidence from S-Type Granite of Hejiao Area

• 责任者：He Yuankai (Key Laboratory of Orogenic Belt and Crust Evolution ; Ministry of Education ; Beijing 100871 ; China) ; Wu Tairan
• 刊名：Acta Scientiarum Naturalium Universitatis Pekinensis
• 出版年：2010
• 卷期：46(4)
• 关键词：S型花岗岩 ; S-type granite ; 板块碰撞 ; plate collision ; 华北板块 ; North China Plate
• 页码：p.571-580
• 图表：8 illus., 2 tables, 70 refs.
• 分类号：0300
• issnNo：ISSN0479-8023
• isbnNo：CN11-2442/N

The study of Neoarchean S-type granite, with obvious tectonic significance, which lies in Hejiao area, Darhan Muminggan Lianheqi, Inner Mongolia, in major elements, trace elements and SHRIMP zircon U-Pb geochronology provided further evidence for understanding the nature of tectonic setting of the northern margin of North China Plate at the end of Neoarchean. The major elements features of Hejiao granite indicate that it belongs to cal-alkaline series with strongly peraluminous characteristics and Rittman index σ is between 0.54 and 0.57. The granite has high total rare earth elements（REE） values（243.8~427.1 μg/g）, and enriches light REE relative to the heavy ones, and has negative anomalies characteristics in Eu（（La/Yb） N=14.88-18.18, Eu*/Eu = 0.31~0.65）.