Diagenesis and sedimentary environment of the lower Xiaganchaigou formation deposited during the Eocene/Oligocene transition in the Lenghu tectonic belt, Qaidam Basin, China
文献类型：期刊论文
| 作者 | Yang, Yongheng1,2,3; Sun, Guoqiang1,2; Wang, Yetong1,2,3; Wu, Jie2,3; Jiang, Yun1,2,3; Wang, Meng1,2,3; Li, Jiasi1,2,3 |
| 刊名 | ENVIRONMENTAL EARTH SCIENCES
 |
| 出版日期 | 2020-05-12 |
| 卷号 | 79期号:10页码:14 |
| 关键词 | Petrology Geochemistry Diagenesis Sedimentary environment Qaidam Basin Qinghai-Tibetan plateau |
| ISSN号 | 1866-6280 |
| DOI | 10.1007/s12665-020-08969-6 |
| 英文摘要 | This paper presents detrital modes, clay and carbonate cements and major and trace element contents of the sandstones from the lower Xiaganchaigou formation deposited during the Eocene/Oligocene transition in the Lenghu tectonic belt on the northern margin of the Qaidam Basin, NW Qinghai-Tibetan plateau. Our results show that the sandstones are mainly lithic feldspathic, with clay content varying from 4.1 to 42.5 vol. % (average 13.7 vol. %). These sandstones have low contents of Na2O, MgO, Al2O3, K2O, CaO and TiO2, with the average contents of 2.14 wt%, 0.78 wt%, 7.96 wt%, 2.11 wt%, 6.14 wt% and 0.15 wt%, respectively. The total content of major elements is<30 wt%, indicating that the pore water was in an alkaline environment with high pressure, so that the decarboxylation reaction of the organic matter took place to generate a large amount of carbon dioxide with a loss of C-13. Consequently, the delta C-13 of the carbonate cement is negatively biased to - 6.4 parts per thousand; the deep high temperature environment and the external fresh water leaching make the delta O-18 value of the carbonate cement gradually lose, reaching - 13.19 parts per thousand, according to its precipitation temperature (78-108 degrees C) and pore water salinity (104-110), it is judged that carbonate cement is mainly formed in the middle diagenetic stage and early diagenetic stage. The rare earth elements are mainly authigenic by the results of Sigma REE and Y/Ho, and the deposition characteristics of trace elements such as Zn, Th, U, Ni, Co, Cr, Sr/Cu, Ce-anom, Ce/La, Sigma REE, Eu/Eu*, La/Yb, V/(V+Ni) and the transformation of later diagenesis, combining the characteristic of the global climate and the influence of uplifting of the Qinghai-Tibetan Plateau, indicate that the lower Xiaganchaigou formation was in a dry, cold and anoxic reducing environment. |
| WOS关键词 | RARE-EARTH-ELEMENTS ; ISOTOPIC EVIDENCE ; NORTHERN TIBET ; BLACK SHALES ; PROVENANCE ; GEOCHEMISTRY ; CONSTRAINTS ; PALEOREDOX ; EVOLUTION |
| 资助项目 | CAS "Light of West China" Program[Y304RC1SGQ] ; Nature Science Foundation of Gansu Province[1308RJZA310] ; Key Laboratory Project of Gansu Province[1309RTSA041] |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000536301000002 |
| 出版者 | SPRINGER |
| 资助机构 | CAS "Light of West China" Program ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Nature Science Foundation of Gansu Province ; Nature Science Foundation of Gansu Province ; Nature Science Foundation of Gansu Province ; Nature Science Foundation of Gansu Province ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Nature Science Foundation of Gansu Province ; Nature Science Foundation of Gansu Province ; Nature Science Foundation of Gansu Province ; Nature Science Foundation of Gansu Province ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Nature Science Foundation of Gansu Province ; Nature Science Foundation of Gansu Province ; Nature Science Foundation of Gansu Province ; Nature Science Foundation of Gansu Province ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Nature Science Foundation of Gansu Province ; Nature Science Foundation of Gansu Province ; Nature Science Foundation of Gansu Province ; Nature Science Foundation of Gansu Province ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/96691]  |
| 专题 | 地质与地球物理研究所_兰州油气中心 |
| 通讯作者 | Sun, Guoqiang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources, Gansu Prov Key Lab Petr Resources Res, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Yongheng,Sun, Guoqiang,Wang, Yetong,et al. Diagenesis and sedimentary environment of the lower Xiaganchaigou formation deposited during the Eocene/Oligocene transition in the Lenghu tectonic belt, Qaidam Basin, China[J]. ENVIRONMENTAL EARTH SCIENCES,2020,79(10):14. |
| APA | Yang, Yongheng.,Sun, Guoqiang.,Wang, Yetong.,Wu, Jie.,Jiang, Yun.,...&Li, Jiasi.(2020).Diagenesis and sedimentary environment of the lower Xiaganchaigou formation deposited during the Eocene/Oligocene transition in the Lenghu tectonic belt, Qaidam Basin, China.ENVIRONMENTAL EARTH SCIENCES,79(10),14. |
| MLA | Yang, Yongheng,et al."Diagenesis and sedimentary environment of the lower Xiaganchaigou formation deposited during the Eocene/Oligocene transition in the Lenghu tectonic belt, Qaidam Basin, China".ENVIRONMENTAL EARTH SCIENCES 79.10(2020):14. |
入库方式： OAI收割
来源：地质与地球物理研究所
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