Petrogenesis and shock metamorphism of the enriched lherzolitic shergottite Northwest Africa 7755
文献类型：期刊论文
| 作者 | Wang, Shu-Zhou1; Zhang, Ai-Cheng1,2; Pang, Run-Lian1; Chen, Jia-Ni1; Gu, Li-Xin3; Wang, Ru-Cheng1 |
| 刊名 | METEORITICS & PLANETARY SCIENCE
 |
| 出版日期 | 2017-11-01 |
| 卷号 | 52期号:11页码:2437-2457 |
| ISSN号 | 1086-9379 |
| DOI | 10.1111/maps.12941 |
| 文献子类 | Article |
| 英文摘要 | Northwest Africa (NWA) 7755 is a newly found enriched lherzolitic shergottite. Here, we report its detailed petrography and mineralogy. NWA 7755 contains both poikilitic and non-poikilitic lithologies. Olivine has different compositional ranges in the poikilitic and non-poikilitic lithologies, Fa(30-39) and Fa(37-40), respectively. Pyroxene in thenon-poikilitic lithology is systematically Fe-richer than that in the poikilitic lithology. The chromite grains in non-poikilitic lithology are highly Ti-richer than those in the poikilitic lithology. The chemical variations of olivine, pyroxene, and chromite between the poikilitic and non-poikilitic lithologies support a two-stage formation model of lherzolitic shergottites. Besides planar fractures and strong mosaicism in olivine and pyroxene, shock-induced melt veins and pockets are observed in NWA 7755. Olivine grains within and adjacent to melt veins and/or pockets have either transformed to ringwoodite, amorphous phase, or dissociated to bridgmanite plus magnesiowustite. Merrillite in melt veins has completely transformed to tuite; however, apatite only has partially transformed to tuite, indicating a relatively sluggish transformation rate. The partial transformation from apatite to tuite resulted in fractional devolatilization of Cl and F in apatite. The fine-grained mineral assemblage in melt veins consists mainly of bridgmanite, minor magnesiowustite, Fe-sulfide, Fe-phosphide, and Ca-phosphate minerals. The coexistence of bridgmanite and magnesiowustite in these veins indicates a shock pressure of >similar to 24GPa and a temperature of 1800-2000 degrees C. Coesite and seifertite are probably present in NWA 7755. The presence of these high-pressure minerals indicates that NWA 7755 has experienced a more intense shock metamorphism than other enriched lherzolitic shergottites. |
| WOS关键词 | HIGH-PRESSURE PHASES ; OLIVINE-RINGWOODITE TRANSFORMATION ; MARTIAN METEORITE TISSINT ; TENHAM L6 CHONDRITE ; INDUCED MELT VEIN ; MULTICOMPONENT PYROXENES ; SUIZHOU METEORITE ; VIBRATIONAL-SPECTRA ; FECR2O4 POLYMORPH ; OXYGEN FUGACITY |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000414860200010 |
| 出版者 | WILEY |
| 资助机构 | Natural Science Foundation of China(41373065 ; Natural Science Foundation of China(41373065 ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 41673068) ; 41673068) ; Natural Science Foundation of China(41373065 ; Natural Science Foundation of China(41373065 ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 41673068) ; 41673068) ; Natural Science Foundation of China(41373065 ; Natural Science Foundation of China(41373065 ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 41673068) ; 41673068) ; Natural Science Foundation of China(41373065 ; Natural Science Foundation of China(41373065 ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 41673068) ; 41673068) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/82042]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhang, Ai-Cheng |
| 作者单位 | 1.Nanjing Univ, State Key Lab Mineral Deposits Res, Sch Earth Sci & Engn, Nanjing 210046, Jiangsu, Peoples R China 2.Nanjing Univ, Lunar & Planetary Sci Inst, Nanjing 210046, Jiangsu, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Shu-Zhou,Zhang, Ai-Cheng,Pang, Run-Lian,et al. Petrogenesis and shock metamorphism of the enriched lherzolitic shergottite Northwest Africa 7755[J]. METEORITICS & PLANETARY SCIENCE,2017,52(11):2437-2457. |
| APA | Wang, Shu-Zhou,Zhang, Ai-Cheng,Pang, Run-Lian,Chen, Jia-Ni,Gu, Li-Xin,&Wang, Ru-Cheng.(2017).Petrogenesis and shock metamorphism of the enriched lherzolitic shergottite Northwest Africa 7755.METEORITICS & PLANETARY SCIENCE,52(11),2437-2457. |
| MLA | Wang, Shu-Zhou,et al."Petrogenesis and shock metamorphism of the enriched lherzolitic shergottite Northwest Africa 7755".METEORITICS & PLANETARY SCIENCE 52.11(2017):2437-2457. |
入库方式： OAI收割
来源：地质与地球物理研究所
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