REE characteristics of matrix dolomites and its origin of Lower Ordovician in eastern Tabei area, Tarim basin
文献类型：期刊论文
| 作者 | Han YinKue1; Li Zhong1; Han DengLin1; Peng ShouTao2; Liu JiaQing1
|
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2009-10-01 |
| 卷号 | 25期号:10页码:2405-2416 |
| 关键词 | Matrix dolomite REE characteristics Marine dolomitization Hydrothermal fluids Eastern Tabei area |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | The mechanism of dolomitization is still problematic in carbonate sedimentology, and it is also a hotspot in carbonate diagenesis. One of the keys in the processes of dolomitization is the origin of diagenetic fluids. Based on detail study of sedimentology and petrology, the authors analyzed BEE of the matrix dolomites and dolomitic carbonates of Penglaiba Formation of Lower Ordovician in eastera Tabei area. Lower concentrations of Se, Th, Hf, Zr, positive La anomaly, relatively higher ratio of Y/Ho show that carbonate sediments of Lower Ordovician in eastern Tabei area deposited in shallow marine environment that are free of terrigenous particles The characteristics of positive Ce anomaly, slightly positive Gd anomaly, positive La anomaly, positive Y anomaly, the positive correlation between positive La anomaly and Y anomaly indicate that matrix dolomites have resemble REE characteristics with sea-water and the diagenetic fluids of dolomitization probably originated from seawater. However, the different Sigma REE + Y, Sigma LREE and Sigma HREE between matrix dolomites and dolomitic limestones infer that REE was removed and HREE is more easily removed than LREE during dolomitization. Therefore, marine diagenetic fluids should be responsible for the relative enrichment of LREE and lower Y/Ho ratios, which are contrary to the REE characteristics of modern sea-water. The characteristics of petrology, sedimentology, trace elements and stable isotopes show that matrix dolomites of Lower Ordovician are products of marine dolomitization, and some samples which hove slightly negative Eu anomaly infers the existence of hydrothemal fluids, and the Lower Ordovician fracture filled calcites, which characterized by very negative delta(18) O, higher Sr-87/Sr-86 and some very high homogeneous temperature of fluid inclusions also indicate the relatively limited influence of hydrothermal fluids on the matrix dolomite. |
| WOS关键词 | RARE-EARTH-ELEMENT ; SEAWATER ; CARBONATE ; DOLOMITIZATION ; EVOLUTION ; GEOCHEMISTRY ; RESERVOIRS ; AUSTRALIA ; YTTRIUM ; FACIES |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000271670400010 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/71868]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Han YinKue |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Sinopec Explorat & Prod Res Inst, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Han YinKue,Li Zhong,Han DengLin,et al. REE characteristics of matrix dolomites and its origin of Lower Ordovician in eastern Tabei area, Tarim basin[J]. ACTA PETROLOGICA SINICA,2009,25(10):2405-2416. |
| APA | Han YinKue,Li Zhong,Han DengLin,Peng ShouTao,&Liu JiaQing.(2009).REE characteristics of matrix dolomites and its origin of Lower Ordovician in eastern Tabei area, Tarim basin.ACTA PETROLOGICA SINICA,25(10),2405-2416. |
| MLA | Han YinKue,et al."REE characteristics of matrix dolomites and its origin of Lower Ordovician in eastern Tabei area, Tarim basin".ACTA PETROLOGICA SINICA 25.10(2009):2405-2416. |
入库方式： OAI收割
来源：地质与地球物理研究所
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