An Investigation of Carbon in Dar Al Gani 319 Polymict Ureilite

Timing of Basaltic Volcanism in Ureilite Parentbody Inferred from the 26al Ages of Plagioclase-bearing Clasts in Dag-319 Polymict Ureilite

Introduction: Ureilitic meteorites are ultramafic rocks with highly depleted REE abundance, while showing primitive signatures, such as abundant noble gases and oxygen isotopic heterogeneities. A lack of basaltic components among ureilitic meteorites is the major cause of our poor understanding of their evolution. Especially, chronological studies of ureilites are limited because of depletion o...

Feldspathic Clasts in Polymict Ureilites

Introduction: Ureilites are ultramafic meteorites composed mainly of magnesian (mg#=76-95) olivine and pyroxene, with minor carbon-bearing phases and metal. Ureilite characteristics suggest that monomict ureilites are residues of partial melting on a carbonaceous chondrite-like asteroidal parent body [1]. Basaltic meteorites complementary to the monomict ureilites are currently unknown, but wou...

Evidence from polymict ureilite meteorites for a disrupted and re-accreted single ureilite parent asteroid gardened by several distinct impactors

Ureilites are ultramafic achondrites that exhibit heterogeneity in mg# and oxygen isotope ratios between different meteorites. Polymict ureilites represent near-surface material of the ureilite parent asteroid(s). Electron microprobe analyses of >500 olivine and pyroxene clasts in several polymict ureilites reveal a statistically identical range of compositions to that shown by unbrecciated ure...

FELDSPATHIC CLASTS IN POLYMICT UREILITE DaG

Evidence for a Single Ureilite Parent Asteroid from a Petrologic Study of Polymict Ureilites