Pyroxene polymorphs in melt veins of the heavily shocked Sixiangkou L6 chondrite
文献类型：期刊论文
| 作者 | Zhang, Aicheng; Hsu, Weibiao; Wang, Rucheng; Ding, Mingwei |
| 刊名 | EUROPEAN JOURNAL OF MINERALOGY
 |
| 出版日期 | 2006-11-01 |
| 卷号 | 18期号:6页码:719-726 |
| 关键词 | Sixiangkou L6 chondrite heavily shocked melt veins akimotoite phase transformation |
| ISSN号 | 0935-1221 |
| 英文摘要 | Sixiangkou is a heavily shocked L6 chondrite that contains numerous shock-induced melt veins with varying widths. This paper focuses on pyroxene polymorphs in shock-induced melt veins in the meteorite and discusses their implication to the high pressure and temperature conditions during impact metamorphism. The major high-pressure polymorphs are majorite and majorite-pyrope solid solution. Diopside, akimotoite and jadeite were also observed in melt veins of the Sixiangkou chondrite. Diopside coexists with ringwoodite (+ akimotoite) in coarse-grained fragments of the melt veins. Two mechanisms were proposed for the lack of phase transformation of diopside: a) low local temperature and b) a very sluggish transformation rate. Majorite and majorite-pyrope occur as coarse-grained polycrystalline and fine-grained solid solution. They were formed through solid state transformation and crystallized from a melt under pressures, respectively. Akimotoite coexists with low-Ca pyroxene in coarse-grained fragments of melt veins. They have nearly identical chemical compositions to the host low-Ca pyroxene, implying a solid state transformation mechanism. Jadeite appeared as fine-grained and was originated through retrograde transformation of lingunite under moderate post-shock pressure and high temperature conditions. The coexistence of different high-pressure pyroxene polymorphs reflects an inhomogeneous distribution of temperature in the shock-induced melt veins and a kinetic effect of phase transformations of minerals during shock metamorphism. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Mineralogy |
| 类目[WOS] | Mineralogy |
| 研究领域[WOS] | Mineralogy |
| 关键词[WOS] | HIGH-PRESSURE PHASES ; DIOPSIDE CAMGSI2O6 ; METEORITE ; TRANSFORMATION ; CONSTRAINTS ; RINGWOODITE ; ASSEMBLAGE ; ENSTATITE ; MAJORITE ; OLIVINE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000243187900005 |
| 公开日期 | 2012-02-07 |
| 源URL | [http://159.226.72.40/handle/332002/3596]  |
| 专题 | 紫金山天文台_天体化学和行星科学实验室 |
| 作者单位 | 1.Purple Mt Observ, Lab Astrochem & Planetary Sci, Nanjing 210008, Peoples R China 2.Nanjing Univ, State Key Lab Mineral Deposits Res, Nanjing 210093, Peoples R China 3.Nanjing Univ, Dept Earth Sci, Nanjing 210093, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Aicheng,Hsu, Weibiao,Wang, Rucheng,et al. Pyroxene polymorphs in melt veins of the heavily shocked Sixiangkou L6 chondrite[J]. EUROPEAN JOURNAL OF MINERALOGY,2006,18(6):719-726. |
| APA | Zhang, Aicheng,Hsu, Weibiao,Wang, Rucheng,&Ding, Mingwei.(2006).Pyroxene polymorphs in melt veins of the heavily shocked Sixiangkou L6 chondrite.EUROPEAN JOURNAL OF MINERALOGY,18(6),719-726. |
| MLA | Zhang, Aicheng,et al."Pyroxene polymorphs in melt veins of the heavily shocked Sixiangkou L6 chondrite".EUROPEAN JOURNAL OF MINERALOGY 18.6(2006):719-726. |
入库方式： OAI收割
来源：紫金山天文台
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