2024年12月21日 · Northwest Africa 8656 (NWA 8656) Northwest Africa Purchased: 2014 Jan Classification: Martian meteorite (Shergottite) History: Purchased by Darryl Pitt in January and February 2014 from a group of dealers in Mauritania. Physical characteristics: Exterior mostly wind-ablated with a few remnant patches of dull black fusion crust.

Summary: Comparing with other enriched basaltic shergottites, NWA 8656 shows similar petrological characteristics. The magmatic evolution has been pro-posed, 1) Mg-rich pyroxene always present as core of single grain.The complex zoning of pyroxene indicate the coexisting of pigeonite and augite that augite is partially rimmed by ferroan ...

The oxygen fugacity of NWA 8656 (QFM –0.9±0.5) suggests an oxidized condition at the late-stage crystallization process, and the CI-normalized REE patterns of different minerals show enrichment in LREE, compared to that of depleted shergottites.

2022年3月1日 · The Sm-Nd isotopic data of the phosphates in meteorites NWA 10153, Zagami, NWA 8656, and NWA 10414 are presented in Fig. 6 and Table S6. Only two in situ Sm-Nd isotopic data points were obtained in the present study for apatite in nakhlite NWA 10153 (Table S6) and thus could not form an isochron by themselves.

2018年10月16日 · The crystallization of Fe-rich pyroxenes and the existence of different symplectites indicate that NWA 8656 underwent eruption. The oxygen fugacity of NWA 8656 (QFM –0.9±0.5) suggests an oxidized condition at the late-stage crystallization process, and the CI-normalized REE patterns of different minerals show enrichment in LREE, compared to ...

本文以火星陨石NWA 8656为研究对象,利用扫描电镜、电子探针和激光剥蚀电感耦合等离子体质谱仪 (LA-ICP-MS)等分析技术,对样品进行岩相学和单矿物主微量地球化学等方面分析,来研究探讨火星陨石NWA 8656的岩浆演化过程,以及富集型辉玻无球粒陨石源区的成因。

The oxygen fugacity of NWA 8656 (QFM –0.9±0.5) suggests an oxidized condition at the late-stage crystallization process, and the CI-normalized REE patterns of different minerals show enrichment in LREE, compared to that of depleted shergottites.

The oxygen fugacity of NWA 8656 (QFM –0.9±0.5) suggests an oxidized condition at the late-stagecrystallization process, and the CI-normalized REE patterns of different minerals show enrichment in LREE, compared to that of depletedshergottites.

Classification: Martian (shergottite, diabasic). Likely paired with NWA 8656. Specimens: 20.9 g plus one polished thin section at UWB. The remaining material is held by E. Twelker.

Enriched Mafic Diabasic Shergottite NWA 8656/8657: Multiple greenish, medium-grained, aphyric stones (total ~3.5 kg) recovered at an unknown site in early 2014 were classified under two separate names.