Kinetic processes for plastic deformation of olivine in the Poyi ultramafic intrusion, NW China: Insights from the textural analysis of a similar to 1700 m fully cored succession
文献类型：期刊论文
| 作者 | Yao, Zhuo-sen1,2; Qin, Ke-zhang1,2; Xue, Sheng-chao3 |
| 刊名 | LITHOS
 |
| 出版日期 | 2017-07-01 |
| 卷号 | 284页码:462-476 |
| 关键词 | Compaction of crystal mush Undulose extinction and subgrain boundary Textural coarsening Magmatic system Quantitative textural analysis |
| ISSN号 | 0024-4937 |
| DOI | 10.1016/j.lithos.2017.05.002 |
| 文献子类 | Article |
| 英文摘要 | The ubiquitous presence of undulose extinction and subgrain boundaries in olivine crystals is commonly perceived as originating in the mantle, however these plastic deformation features are also well developed in the Poyi ultramafic intrusion, NW China. In this case, olivine was deformed through kinetic processes in a crustal magma chamber, rather than by deformation processes in the upper mantle. Moreover, accumulation and textural coarsening were critical to the characteristics of crystal size distributions (CSDs) of olivines in the Poyi intrusion. The axial deformational compaction of crystal mush was revealed by virtue of other quantitative textural analyses (e.g., spatial distribution patter, alignment factor and aspect ratio). Additionally, based on the contrast of density between crystal matrix and interstitial melt, adequate stress was generated by the km-scale crystal framework in Poyi body (similar to 2-11 MPa) which triggered the distortion of grain-lattice in olivine. The deformation mechanisms of olivine primarily are dislocation creep and dislocation-accommodated grain boundary sliding (DisGBS), while diffusion creep is subsidiary. This study has revealed various kinetic processes in a magmatic system by first demonstrating the genetic relationship between mineral deformation and axial compaction of crystal mush while highlighting the uncertainty of employing the deformation features of olivine in peridotite xenoliths as an indicator for a mantle origin. In contrast to the olivine populations of xenocrysts that underwent fragmentation during ascent, the deformed primitive olivines in compaction exhibit a distinct shortage of small grains, which is conducive to delimiting these two types of deformed grains. (C) 2017 Elsevier B.V. All rights reserved. |
| WOS关键词 | CRYSTAL SIZE DISTRIBUTIONS ; ASIAN OROGENIC BELT ; MAGMA SOLIDIFICATION PROCESSES ; CU SULFIDE MINERALIZATION ; HIGH-TEMPERATURE CREEP ; MOLTEN UPPER-MANTLE ; EXPERIMENTAL CONSTRAINTS ; LAYERED INTRUSION ; BUSHVELD COMPLEX ; HETEROGENEOUS NUCLEATION |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000405252300030 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | NSFC(41030424) ; NSFC(41030424) ; NSFC(41030424) ; NSFC(41030424) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/43597]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 通讯作者 | Qin, Ke-zhang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yao, Zhuo-sen,Qin, Ke-zhang,Xue, Sheng-chao. Kinetic processes for plastic deformation of olivine in the Poyi ultramafic intrusion, NW China: Insights from the textural analysis of a similar to 1700 m fully cored succession[J]. LITHOS,2017,284:462-476. |
| APA | Yao, Zhuo-sen,Qin, Ke-zhang,&Xue, Sheng-chao.(2017).Kinetic processes for plastic deformation of olivine in the Poyi ultramafic intrusion, NW China: Insights from the textural analysis of a similar to 1700 m fully cored succession.LITHOS,284,462-476. |
| MLA | Yao, Zhuo-sen,et al."Kinetic processes for plastic deformation of olivine in the Poyi ultramafic intrusion, NW China: Insights from the textural analysis of a similar to 1700 m fully cored succession".LITHOS 284(2017):462-476. |
入库方式： OAI收割
来源：地质与地球物理研究所
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