Geochemistry and Provenance of the Upper Devonian Shaliushui Formation in Jingyuan County , Gansu
详细信息
- 责任者：Xu Yajun (Key Laboratory of Biology and Environment Geology ; Education Ministry ; Wuhan 430074 ; China) ; Du Yuansheng
- 刊名：Acta Sedimentologica Sinica
- 出版年：2011
- 卷期：29(1)
- 关键词：沉积地球化学 ; sedimentary geochemistry ; 物源分析 ; provenance analysis ; 甘肃 ; Gansu Province
- 页码：p.41-54
- 图表：12 illus., 1 table, 62 refs.
- 分类号：0803
- issnNo：ISSN1000-0550
- isbnNo：CN62-1038/P
摘要
Sedimentary geochemistry of detrital rocks from the upper Devonian Shaliushui Formation in Jingyuan, Gansu Province suggest that sandstone contain higher SiO2 and plagioclase content than mudstone. Mudstone, however, occupy higher femic mineral and mineral K-bearing than sandstone. All samples are depleted in Nb, Ta and Sr elements. Some of sandstones are enriched with Zr and Hf elements, with strong negative Eu anomalies, and others are depleted in Zr and Hf without negative Eu anomalies. Integrated in the sedimentary evolution from the upper Ordovician to Lower and Middle Devonian and igneous rocks, the North Qilian orogenic belt completed the transfer from compression to extension during the Late Devonian, which indicate that the upper Devonian Shaliushui Formation is the sedimentary record of this process.
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