Petrological-geochemical studies of the martian rocks (meteorites) originated from Mars.

对源自火星的火星岩石（陨石）的岩石地球化学研究。

• 批准号: 08404031
• 负责人: YANAI Keizo
• 金额: $ 7.87万
• 依托单位: Iwate University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08404031/
• 关键词: Martian meteorites; Zagami; ALH84001; Yamato-793605; ALH-77005; Chassigny; Nakhla; Shergotty; 火星の生命; chassigny; Nakhal

Twelve martian meteorites are well known so far as SNC meteorites (Shergottites (S), Nakhlites (N) and Chassignites (C)), which are believed to have originated from Mars. All the martian meteorites are igneous rocks formed by crystallization of a magma on the parent planet, Mars, during recent history of the solar system (116 Ma -1.3 Ga) except one specimen. Most martian meteorites show a typical crystalline igneous texture with intense shock, and only two specimens (ALH84001 and Yamato-793605) show the monomict brecciaed texture. Especially, ALH84001 is orthopyroxene monomict breccia indicating a remarkably old age of 4.5 Ga, and suggest the past life on Mars. Recently more three specimens were recovered and identified to martian origin. They are Y-1071(tentative), Dar al Ghani 476 and Lucky 13.According to their textures, martian meteorites are briefly separated into two textural groups : crystalline and breccia. A crystalline group includes cumulate, poikilitic and gabbroic - basaltic textures. They are preliminary classified into following five rock types of dunite, lherzolite, Clinopyroxenite, orthopyroxenite and gabbro-dolerite from their texture, mineral assemblages and chemical compsitions along with their crystallization.1. Dunite (Chassignites) : Chassigny2. Lherzolite : ALH-77OO5, LEW88516, Yamato-7936O5, Y-10753. Clinopyroxenite (Nakhlites) Nakhla, Lafayette, Governador Valadares4. Orthpyroxenite : ALH84001, (Dar al Ghani 476)5. Gabbro-dolerite (Shergottites) : Shergotty, Zagami, EETA79OO1, QUE94201, (Lucky 13)

十二个火星陨石是迄今为止以SNC陨石（Shergottites（S），Nakhlites（n）和机制（C））为名的，据信它们源自火星。所有火星陨石都是在太阳系（116 Ma -1.3 ga）的父母行星上的岩浆结晶形成的火成岩，除一个标本外。大多数火星陨石都表现出典型的结晶火成岩质地，并具有剧烈的冲击，只有两个标本（ALH84001和Yamato-793605）显示了MONOMICT角色质地。特别是，Alh84001是邻苯二甲烯单体角砾岩，表明年龄非常大4.5 GA，并建议火星上的前世。最近，更多的三个标本被回收并确定为火星。他们是Y-1071（暂定），Dar al Ghani 476和Lucky 13.根据其质地，火星陨石短暂地分为两个质地群：Crystalline和Breccia。晶体组包括累积，poikilitic和gabbroic-玄武岩纹理。它们的初步分类为以下五种岩石类型的Dunite，Lherzolite，Clinopyroxenite，Orthopyroxenite和Gabbro-Dolerite，它们的质地，矿物组合和化学综合及其结晶及其结晶1。 Dunite（机制）：Chassigny2。 lherzolite：ALH-77OO5，LEW88516，Yamato-7936O5，Y-10753。 Clinopyroxenite（Nakhlites）Nakhla，Lafayette，副瓦拉达雷斯4。正丙烯石：ALH84001，（Dar al Ghani 476）5。 gabbro-dolerite（shergottites）：Shergotty，Zagami，Eeta79oo1，Que94201，（幸运13）

项目成果

矢内 桂三: "南極に隕石を探す(日本地球化学会受賞講演)" 1998年度日本地球化学会年会予稿集. (1998)

Keizo Yanai：“在南极洲寻找陨石（日本地球化学会获奖演讲）”日本地球化学会 1998 年年会论文集（1998 年）。

Keizo YANAI: "Newly indentified martian meteorite Yamato-793605 from Antarctia" Proceedings of the 30th International Geological Congress. (in press). (1997)

Keizo YANAI：“来自南极洲的新发现的火星陨石 Yamato-793605”第 30 届国际地质大会论文集。

Keizo Yanai: "Petrological features of the three nakhlites : Nakhla, Lafayette and Governador Valadares meteorites" Proc.31th ISAS Lunar. Planet. Symp.36-39 (1998)

Keizo Yanai：“三颗 nakhlite 陨石的岩石学特征：Nakhla、Lafayette 和 Governador Valadares 陨石”Proc.31th ISAS Lunar。

矢内 桂三: "火星起源Shergottites隕石の特徴と多様性" 日本惑星科学会1997秋季講演会予稿集. 19 (1997)

Keizo Yanai：“源自火星的 Shergottites 陨石的特征和多样性”日本行星学会 1997 年秋季会议记录 19 (1997)。

矢内 桂三: "火星起源隕石" 地球惑星科学連合学会1997年合同大会予稿集. 563 (1997)

Keizo Yanai：“火星起源的陨石”1997 年地球与行星科学联盟联合会议论文集 563 (1997)。