2025年3月17日 · Name: Northwest Africa 5790 This is an OFFICIAL meteorite name. Abbreviation: NWA 5790 Observed fall: No Year found: 2009 Country: (Northwest Africa) Mass: 145 g Classification

2015年2月16日 · NWA 5790 provides important new insights into the crystallization history and internal structure of its parent lava flow/sill, and the nature of water-mediated alteration of the Martian crust. Key findings are as follows: NWA 5790 has the greatest abundance of mesostasis among the nakhlites (38.1 ± 3.6 vol%).

2016年10月1日 · In this paper, we present the petrology, mineralogy and geochemistry of NWA 5790, and compare this new find with the other nakhlites to discuss: (1) the crystallization conditions of cumulus augite in the nakhlite magma chamber, (2) the status of olivine in the Nakhlite Parental Magma, and (3) the final position of NWA 5790 within the pile at ...

NWA 5790 包含最高的细粒填充物比例，是具有最高冷却速率的 nakhlite 样品（Jambon et al., 2016）。 因此，NWA 5790 中的钛铁矿-钛磁铁矿应记录了nakhlite中最高的封闭温度。

2016年11月14日 · We present a geochemical study of recently discovered Martian meteorite Northwest Africa (NWA) 5790 and use our results to constrain its origin and relationship with the other nakhlites.

NWA 5790 was found in Mauritania; apparently as two pieces. There could be more! It apparently lacks fusion crust, and has many crevices filled with terrestrial contamination (figures 1 and 2). It has been dated at 1.38 b.y. with exposure to cosmic rays for ~ 7 m.y. Its terrestrial age has yet to be determined. Petrography

Northwest Africa (NWA) 5790 is the most recently discovered member of the nakhlite group. Its mineralogy differs from the other nakhlites with a high abundance mesostasis (38.1 ± 3.6 vol%) and scarcity of olivine (4.0 ± 2.2 vol%).

2015年2月1日 · Northwest Africa (NWA) 5790 is the most recently discovered member of the nakhlite group. Its mineralogy differs from the other nakhlites with a high abundance mesostasis (38.1 ± 3.6 vol%) and...

We present a geochemical study of recently discovered Martian meteorite Northwest Africa (NWA) 5790 and use our results to constrain its origin and relationship with the other nakhlites. This nakhlite is a clinopyroxene cumulate composed of phenocrysts of augite, olivine, and rare oxides surrounded by a mesostasis composed of vitrophyric glass ...

2021年8月17日 · Newly analysed titanomagnetite–ilmenite (Tim–Ilm) intergrowths from Martian nakhlite meteorite Northwest Africa (NWA) 5790 yielded crystallisation temperature up to 1032 °C and oxygen fugacity (fO2) up to ΔQFM + 1.6, notably higher than previous estimates for nakhlite magmas (temperature < 950 °C, fO2 = ΔQFM − 0.5 to ΔQFM + 1).