Provenance and Tectonic Setting of the Neoproterozoic Diamictites from Jiayuan Formation in Northern
详细信息
- 责任者：Sun Linhua (School of Earth Sciences and Engineering ; Suzhou University ; Suzhou 234000 ; China) ; Gui Herong
- 刊名：Acta Geoscientica Sinica
- 出版年：2010
- 卷期：31(6)
- 关键词：岩屑杂岩 ; diamictite ; 物源分析 ; provenance analysis ; 构造环境 ; tectonic setting ; 安徽 ; Anhui Province
- 页码：p.833-842
- 图表：9 illus., 2 tables, 38 refs.
- 分类号：0803
- issnNo：ISSN1006-3021
- isbnNo：CN11-3474/P
摘要
Field observation and petrographic study as well as a systematic analysis of major and trace elements (including rare earth elements) were carried out for diamictites from the Neoproterozoic Jiayuan Formation in northern Anhui Province. The results imply that these diamictites are composed of carbonates and terrigenous detritus of variable proportions (1/1.5～1/9) and belong to "mixed sedimentation with gradual facies change". Geochemical features demonstrate that the terrigenous detritus was mainly derived from the continental arc felsic volcanics, with minor contribution from the old basement. Combined with recent research achievements, the authors hold that the Neoproterozoic sedimentation in northern Anhui Province probably took place between 1.0 and 0.8 Ga, and the sedimentary environment was related to the back arc extension of the southeastern margin of the North China Craton during the convergence of Rodinia supercontinent.