Dhofar 1180 Lunar Meteorite |
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A 115.2 g stone in the shape of a thin-bladed talon, was found by Michael Farmer in the Dhofar region of Oman. Description and classification (T. Bunch and J. Wittke, NAU): feldspathic fragmental breccia that contains a variety of lithologies set in a well-indurated, comminuted matrix of similar materials; preferred orientation of fragments and clasts. Mostly ferroan anorthosites with clasts of gabbroic anorthosites, anorthositic gabbros and norites, troctolites, olivine gabbros, microporphyritic and fine-grained impact melt breccias, and rare, ophitic/subophitic basalts and symplectites of unknown provenance. Anorthositic plagioclase, An94.5-98, FeO = 0.280.78 wt %. Olivine (FeO/MnO = 82-110): ferroan anorthosite, Fa38; norite, Fa18; olivine gabbro, Fa36.8. Orthopyroxenes (FeO/MnO = 5073): ferroan anorthosite, Fs38.6Wo2.1; olivine gabbro, Fs33.4Wo4.3; ophitic basalt core, Fs40Wo11.8, rim, Fs69.1Wo15.8. Very light weathering. Specimens: type specimen, 20.6 g, NAU; main mass. Farmer. A second trip to the find area yeilded several small additional specimens weighing 3.1, 2.04, .78 and .474 grams. |
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Click on images to enlarge:
Thin Section Photo.
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