Review and reflection on ophiolite research: Taking Shuanggou ophiolite as an example
文献类型：期刊论文
| 作者 | Zhang Qi |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2021-04-01 |
| 卷号 | 37期号:4页码:957-973 |
| 关键词 | Ophiolite Orogenic peridotite Shuanggou Review Reflection Three elements of ophiolite Rock assemblage M lange Deep-sea sediments |
| ISSN号 | 1000-0569 |
| DOI | 10.18654/1000-0569/2021.04.01 |
| 英文摘要 | Shuanggou ophiolite, located in the Ailao Mountain Belt, Yunnan Province, is one of the first ophiolites studied by the author. The rocks exposed in Shuanggou include peridotite, gabbro, diabase, plagiogranite, basalt, silicalite and so on. The gabbro loses LREE, and the zircon U-Pb age is 362 similar to 328Ma. Basalt has the characteristics of N-MORB and E-MORB, and the zircon U-Pb age is 249Ma. Research suggests that Shuanggou ophiolite may be produced in the intercontinental small ocean basin or rift trough backgrounds. However, Shuanggou has no credible records of deep-sea deposit and m lange. Although its rock assemblage is similar to ophiolite, their geochemistry features also have MORB characteristics, suggesting that Shuanggou may not be a typical ophiolite. If the rock assemblage in Shuanggou were not an ophiolite suite, there would be no ocean basin of a certain scale in the Ailaoshan belt of the Late Paleozoic, and there would be no record of a continental collision. If Shuanggou is not a ophiolite, it may be orogenic peridotite since the rock assemblage of orogenic peridotite is similar to that of ophiolite. Peridotite of ophiolite is produced under oceanic crust; orogenic peridotite is produced under continental crust. By reviewing the research of Shuanggou ophiolite and reflecting on the concept of ophiolite, the author believes that Steinman's "Trinity" concept is appropriate, the resolution of the Penrose Conference in 1972 is correct, and the understanding of the concept of ophiolite by tectonic geologist at the Huairou Conference in 1996 is correct. Considering the importance of m lange for ophiolite, it is recommended to add m lange as an important indicator accompanying ophiolite. If this idea is appropriate, a complete ophiolite assemblage will consist of three elements, magmatic rocks ( including mantle rocks, cumulite, intrusive rocks and volcanic rocks, representing the material composition of the oceanic lithosphere), deep-sea deposit (representing the material composition at the top of the ocean basin), and m lange ( representing the tectonic products of the disappearance of ocean basins and collision of continental plates). Unlike other magmatic rocks, ophiolite requires special methods and special ideas. Only if we understand this point, ophiolite research can be on the right track. The research of Shuanggou ophiolite is in crisis, and some other ophiolites in China may also need to be reviewed. Therefore, reviewing the Shuanggou ophiolite may be meaningful to reflect on the research of ophiolite. |
| WOS关键词 | HIGH-PRESSURE METAMORPHISM ; ARC/BACK-ARC ASSEMBLAGES ; NORTHERN TIBETAN PLATEAU ; RONDA PERIDOTITE MASSIF ; AILAOSHAN SUTURE ZONE ; PALEO-TETHYS OROGEN ; QAIDAM UHPM BELT ; GARNET PERIDOTITE ; UPPER-MANTLE ; SUBDUCTION INITIATION |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000653537300001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/102035]  |
| 专题 | 地质与地球物理研究所_离退休科研人员 |
| 通讯作者 | Zhang Qi |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang Qi. Review and reflection on ophiolite research: Taking Shuanggou ophiolite as an example[J]. ACTA PETROLOGICA SINICA,2021,37(4):957-973. |
| APA | Zhang Qi.(2021).Review and reflection on ophiolite research: Taking Shuanggou ophiolite as an example.ACTA PETROLOGICA SINICA,37(4),957-973. |
| MLA | Zhang Qi."Review and reflection on ophiolite research: Taking Shuanggou ophiolite as an example".ACTA PETROLOGICA SINICA 37.4(2021):957-973. |
入库方式： OAI收割
来源：地质与地球物理研究所
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