本文選題：南極隕石 + 橄輝無球粒隕石�。� 參考：《極地研究》2014年03期

【摘要】：主要介紹GRV 022888和GRV 052408兩塊南極隕石的巖相學(xué)和礦物化學(xué)特征,并在此基礎(chǔ)上探討其成因。GRV 052408隕石主要由橄欖石(~60 vol%)和輝石(~35 vol%)組成,含少量富碳質(zhì)填隙物(~5 vol%);而GRV022888隕石基本由橄欖石(~98 vol%)構(gòu)成,僅有很少量輝石,富碳質(zhì)不透明填隙物含量也較低(~2 vol%)。這兩塊隕石中的橄欖石都可以見到明顯的核部富鐵邊部富鎂的反環(huán)帶結(jié)構(gòu)。結(jié)合巖相學(xué)和礦物化學(xué)特征,將它們劃分為單礦Ⅰ型橄輝無球粒隕石。根據(jù)橄欖石-易變輝石-熔體溫度計,計算得到兩塊隕石的形成溫度在1 220℃左右。我們的研究結(jié)果支持橄輝無球粒隕石為球粒隕石質(zhì)母體部分熔融后的殘余物成因假說。
[Abstract]:The petrographic and mineralogical characteristics of two Antarctic meteorites, GRV 022888 and GRV 052408, are introduced in this paper. On the basis of this, the origin of the meteorite, GRV 052408, is mainly composed of olivine (60 volk) and pyroxene (35 volt). It contains a small amount of carbon-rich interstitial matter, while GRV022888 meteorite is basically composed of olivine, with only a small amount of pyroxene, and the content of carbon-rich opaque interstitial material is also relatively low. The olivine of the two meteorites can be seen in the core iron-rich edge magnesium-rich anti-ring structure. Combined with the characteristics of petrography and mineralogy, they are divided into single ore type I olivine free chondrites. Based on olivine, pyroxene and melt thermometer, the formation temperature of two meteorites was calculated to be about 1 220 鈩，

本文編號：2022282