Evidence for metasomatic mantle carbonatitic magma extrusion in Mesoproterozoic ore-hosting dolomite rocks in the middle Kunyang rift, central Yunnan, China
文献类型：期刊论文
| 作者 | Zhang, Yongbei1,2,3; Bi, Hua1; Yu, Longshi1; Sun, Shihua3; Qiu, Jiaxiang2; Xu, Chengyan2; Wang, Hao2; Wang, Renjing2 |
| 刊名 | PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
 |
| 出版日期 | 2008-08-10 |
| 卷号 | 18期号:8页码:965-974 |
| 关键词 | central Yunnan Kunyang rift Precambrian mineralization carbonatitite volcanic rocks petrogenesis iron and copper ore deposit |
| ISSN号 | 1002-0071 |
| DOI | 10.1016/j.pnsc.2008.01.027 |
| 文献子类 | Article |
| 英文摘要 | The Kunyang rift lying on the western margin of the Yangtze platform is a rare Precambrian Fe-Cu mineralization zone. Wuding-Lufeng basin that is an important part of the zone is located on the west edge in the middle of the rift. The most important ore-hosting rocks are Mesoproterozoic dolomite rocks in the basin controlled by a ring fracture system, which is a fundamental structure of the basin. Plenty of silicate minerals and acicular apatite, feldspar phenocrysts and small vesicular, flown line and flown plane structures, melt inclusion and high temperature fluid inclusion found in most ore-hosting dolomites suggest that this kind of rocks could not be sedimentary dolomite, marble or hydrothermal carbonate rocks. The Zr/Hf and Nb/Ta values of the rocks are identical with those of associated mantle-derived rocks, and vary widely. For the monomineral dolomite, delta(18)O(SMOW)parts per thousand = +5.99 to +18.4 and delta(13)C(PDB)parts per thousand = -3.01 to +0.94, which fall within the range for all carbonatitic volcanic rocks of the world. As for the accessory minerals, the values of delta(18)O(SMOW)parts per thousand of magnetite (=+3.47 to +5.99 parts per thousand) are close to that of the mantle (<5.7%), and the delta(34)S parts per thousand values of sulfides (-5.09 to +5.78, averaging +1.50) are close to that of meteorite. For all the ore-bearing dolomite rocks, epsilon(Nd) = +0.19 to +2.27, and the calculated I(Sr) = 0.699143, while for the associated mantle-derived rocks, epsilon(Nd) = +3.18 to +3.72. All the data suggest that the mineral assemblage is not only igneous but also of metasomatic mantle origin. And the presence of acicular apatite indicates that the rocks were formed by magma rapidly cooling. And the phenocryst texture and vesicular, flown and ropy and pyroclastic structures suggest that the igneous rocks were extrusive. Therefore, the ore-bearing dolomite rocks are carbonatitic volcanic rocks. This conclusion implies that most iron and copper ore deposits hosted in the dolomite rocks should be of the carbonatite type. (C) 2008 National Natural Science Foundation of China and Chinese Academy of Sciences. Published by Elsevier Limited and Science in China Press. All rights reserved. |
| WOS关键词 | ISOTOPE |
| WOS研究方向 | Materials Science ; Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000259543300008 |
| 出版者 | ELSEVIER SCIENCE INC |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/68860]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Bi, Hua |
| 作者单位 | 1.Hainan Normal Univ, Dept Resources Environm & Tourism, Longshepo 57000, Haikou, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 3.China Univ Geosci, Fac Earth Sci, Wuhan 470074, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Yongbei,Bi, Hua,Yu, Longshi,et al. Evidence for metasomatic mantle carbonatitic magma extrusion in Mesoproterozoic ore-hosting dolomite rocks in the middle Kunyang rift, central Yunnan, China[J]. PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL,2008,18(8):965-974. |
| APA | Zhang, Yongbei.,Bi, Hua.,Yu, Longshi.,Sun, Shihua.,Qiu, Jiaxiang.,...&Wang, Renjing.(2008).Evidence for metasomatic mantle carbonatitic magma extrusion in Mesoproterozoic ore-hosting dolomite rocks in the middle Kunyang rift, central Yunnan, China.PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL,18(8),965-974. |
| MLA | Zhang, Yongbei,et al."Evidence for metasomatic mantle carbonatitic magma extrusion in Mesoproterozoic ore-hosting dolomite rocks in the middle Kunyang rift, central Yunnan, China".PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL 18.8(2008):965-974. |
入库方式： OAI收割
来源：地质与地球物理研究所
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