Location: Dar al Gani, Libya (27° 16' 50"N, 16° 24' 20"E)
Type: C3 Ungrouped Carbonaceous Chondrite
Description: Mass (g): ~250g.
Shock stage: S1
Weathering grade: W0/1
Fayalite (mol%): 29.1 (17.4-31.8)
Ferrosilite (mol%): 12.4 (2.9-21.7)
Dar al Gani 978 (44.4g) contains numerous mm-size chondrules, many with thick irregular rims; the mean chondrule size (670±510μm; n=60) is similar to that of CR (700μm) and much larger than those of CM (270μm) or CO (150μm) chondrites . DaG 978 contains ~3 vol.% metal, much of it within chondrules; a few chondrules contain large metal blebs near their margins as in CR chondrites. However, olivine in DaG 978 is much more ferroan (Fa17.4-31.8) than in CR chondrites. The re- fractory lithophile abundances (1.19×CI) scatter some- what, but appear to be mainly in the CO-CM range; vola- tile siderophiles and Se are below those in mean CO and CM and are most similar to CR. DaG 978 is a type-3 ungrouped carbonaceous chondrite.
Won Hie CHOE, Heinz HUBE1, Alan E. RUBIN, Gregory W. KALLEMEYN, and John T. WASSON, Compositions and taxonomy of 15 unusual carbonaceous chondrites, Meteoritics & Planetary Science 45, Nr 4, 531–554 (2010)
Heinz Huber, Alan E. Rubin and John T. Wasson, BULK COMPOSITIONS AND PETROGRAPHIC CHARACTERISTICS OF TEN UNUSUAL CARBONACEOUS CHONDRITES, Lunar and Planetary Science XXXVII (2006)