虎林盆地北部坳陷中、新生代碎屑岩源区构造背景与物源区分析  

Tectonic setting and provenance analysis of Mesozoic-Cenozoic clastic rocks in northern depression of Hulin Basin

作　　者：王伟涛[1] 刘招君[1] 陈秀艳[1] 

机构地区：[1]吉林大学地球科学学院,长春130061

出　　处：《世界地质》2007年第1期14-19,共6页World Geology

摘　　要：虎林盆地北部坳陷地层包括下白垩统裴德组、下云山组、上云山组、珠山组,渐新统虎林组和中新统富锦组。北部坳陷砂岩-泥岩由常量、微量和稀土元素组成,揭示早白垩世砂岩-泥岩源区构造背景为活动大陆边缘,渐新统中新统砂岩-泥岩多呈现出从活动大陆边缘向大陆岛弧转换的地球化学特征。结合沉积相特征和岩屑所反映的源区岩性特点,认为早白垩世时期物源主要来自于坳陷北部完达山造山带和南部古隆起;渐新统物源则主要来自盆地东北部的完达山造山带,并且碎屑岩的原始物质均来自上地壳。The strata in the northern depression of Hulin Basin consist of Lower Cretaceous the Peide- Xiayunshan-, Shangyunshan- and Zhushan formations, and the Oligocene Hulin Formation and Miocene Fujin Formation. The authors analyzed the major and trace elements as well as REE in sandstone and mudstone in the studied area, which reveals the tectonic setting of provenance of the sandstone and mudstone in Early Cretaceous is in a active continental margin; Oligocene- Miocene sandstone and mudstone mainly show geochemical characters in transition from active continental margin to continental island arc. Combined with the characters of sedimentary facies and lithic fragments reflecting the provenance lithology, it is considered that the Early Cretaceous provenance came from Wandashan Orogenic Belt in the north depression and the paleo-uplift of the south of the depression; while the Oligocene provenance came from the Wandashan Orogenic Belt in the northeastern basin; and the original substances of clastic rocks were all from the upper crust.

关 键 词：地球化学 构造背景 物源分析 虎林盆地 

分 类 号：P534.5[天文地球—古生物学与地层学] P542[天文地球—地质学]