请用识别号来引用或链接此条目:
http://www.igeodata.org/handle/20.500.11758/310
点击复制完整元数据记录..
DC 字段 | 值 | 语种 |
---|---|---|
所有者 | Jian Sun | - |
所有者 | Xiangkun Zhu | - |
所有者 | Yuelong Chen | - |
所有者 | Nan Fang | - |
所有者 | Shizhen Li | - |
获取日期 | 2017-03-07T01:35:33Z | - |
获取日期 | 2017-03-07T01:35:33Z | - |
首次发表日期 | 2014-09 | - |
引用地址 | http://www.igeodata.org/handle/20.500.11758/310 | - |
摘要 | The origin of the Bayan Obo ore deposit, the largest REE deposit in the world, has long been debated and various hypotheses have been proposed. Among them is that the Bayan Obo ore deposit is correlated with and has the same origin as the Sailinhudong micrite mound in the southern limb of the Bayan Obo synclinorium. To test this model, the Bayan Obo ore deposit and the Sailinhudong micrite mound are systematically compared for their geological features, elemental geochemistry, and C, O, and Mg isotopic geochemistry. We show that the Bayan Obo ore deposit and the Sailinhudong micrite mound are both calcareous, lens-like in shape, lack bedding features, and are both hosted in a sedimentary formation that consists of clastic sediments and carbonates, unconformably overlying the Archaean–Palaeoproterozoic crystalline basement. However, their geochemical characteristics differ markedly. Compared with the Sailinhudong micrite carbonates, the Bayan Obo ore-hosting dolomite marbles are strongly enriched in LREEs, Ba, Th, Nb, Pb, and Sr, and have very different (PAAS)-normalized REE patterns. Sailinhudong micrite carbonates have higher δ 13 C PDB and δ 18 O SMOW values, falling into the typical sedimentary field, but the Bayan Obo ore-hosting dolomites are isotopically intermediate between primary igneous carbonatite and typical sedimentary limestone. The δ 26 Mg values of the Sailinhudong micrite carbonates are lighter than those of normal Mesoproterozoic sedimentary dolostone, while those of the Bayan Obo ore-hosting dolomite marble are isotopically heavier, similar to δ 26 Mg of mantle xenoliths and Bayan Obo intrusive carbonatite. We conclude that the Bayan Obo ore deposit is not correlated with the Sailinhudong micrite mound; it is neither a micrite mound nor an altered micrite mound. | zh_CN |
语种 | en | zh_CN |
出版者 | Institute of Geology Chinese Academy of Geological Sciences | zh_CN |
主题关键词 | Bayan Obo | zh_CN |
主题关键词 | micrite mound | zh_CN |
主题关键词 | C and O isotopes | zh_CN |
主题关键词 | Mg isotopes | zh_CN |
主题关键词 | dolomite | zh_CN |
成果名称 | Is the Bayan Obo ore deposit a micrite mound? A comparison with the Sailinhudong micrite mound | zh_CN |
类型 | Book | zh_CN |
所属集合: | 科技成果 |
文件中的条目:
条目 | 描述 | 大小 | 格式 | |
---|---|---|---|---|
Is the Bayan Obo ore deposit a micrite mound.pdf | 1.2 MB | Adobe PDF |
![]() 下载/打开 |
在科技平台中所有的数据项都受到原著作权保护。
由于有些作者找不到原文手稿,所以从有关数据库上下载其作品以替之,如有疑义,请联系管理员。