NWA 15788 HED 不成結晶質ディオゲナイト ポリミック・ブレッセア隕石 Achondrite Meteorite - 23 g - (1)

NWA 15788 HED 碟状流星塊群・エドゲナイト（ポリミック凸凹脈）隕石。
Found in November 2022
In Kidal region Mali
25 grams end-Cutt

Northwest Africa 15788 (NWA 15788)

(Northwest Africa)

Classification: HED achondrite (Diogenite, polymict)

OFFICIAL CLASSIFICATION DATA SOURCE:
Petrography: (A. Irving, UWS, and P. Carpenter, WUSL) 斑晶片状の主成分がディオゲナイト由来の砕屑物で構成されたブレセリア（ゾーン化した低Ca辉石、斜長石、Ti不在クロマイトを含む）と、eucritic材料の体積比を含むサブグループ（エクソリーヴド ピジョナイト、ラブラドライト、イリメンライト、シンプレクティック・共結晶のシリカ同形態＋フェナライト＋ヘデンバーグ石から成る）を有する。微量のカマサイトおよび二次的鉄酸化物も存在。

Geochemistry: Orthopyroxene cores (Fs23.2-26.5Wo1.8, FeO/MnO = 31-34, N = 2), pigeonite rims (Fs33.6-34.8Wo8.2-6.8, FeO/MnO = 28-30, N = 2), ferroan pigeonite rim (Fs53.3Wo15.7, FeO/MnO = 35), subcalcic augite (Fs44.0Wo25.5, FeO/MnO = 31), low-Ca pyroxene hosts (Fs55.3-63.4Wo3.9-5.2; Fs39.0Wo5.1; FeO/MnO = 30-34, N = 3), augite exsolution lamellae (Fs28.8-28.9Wo40.5-41.6; Fs19.3Wo41.3; FeO/MnO = 29-33, N = 3), hedenbergite (Fs58.7Wo33.1, FeO/MnO = 42), fayalite (Fs82.7, FeO/MnO = 43), labradorite (An65.0-69.9Or1.4-1.7, N = 2), anorthite (An93.6-94.6Or0.2, N = 2).

Classification: Diogenite (polymict breccia).

Data from:
MB112
Table 0
Line 0:
Place of purchase: MALI
Date: P 2022 Nov
Mass (g): 3912
Pieces: many
Class: Diogenite-pm
Shock stage: low
Weathering grade: low
Fayalite (mol%): 82.7
Ferrosilite (mol%): 23.2-26.5; 33.6-34.8; 55.3-63.4; 28.6-28.9
Wollastonite (mol%): 1.8±0.0; 8.2-6.8; 3.9-5.2; 40.5-41.6
Classifier: (A. Irving, UWS, and P. Carpenter, WUSL)
Type spec mass (g): 25.9
Type spec location: UWB

I am a member of the Meteoritical Society (#7743) and have been collecting meteorites for over 15 years.