Sierra Gorda 013: Unusual CBa-Like Metal-Rich Chondrite

· by · in , ,

M. A. Ivanova, Sh. Yang, M. Humayun, C. A. Lorenz, I. A. Franchi

51st Lunar and Planetary Science Conference (2020), Abstract #1116

PDF (OPEN ACCESS)

“The metal-rich (>20 vol% Fe,Ni-metal) carbonaceous chondrites include CH chondrites, CB chondrites [e.g. 1-3] and the Isheyevo CH/CBb chondrite [4]. The CB chondrites are rare and divided into two subgroups based on their petrologic characteristics: CBa (e.g., Bencubbin, Weatherford, Gujba) and CBb (e.g., Hammadah al Hamra (HH) 237 and Queen Alexandra Range (QUE) 94411/94627) (e. g. [5]. A recently described chondrite, Quebrada Chimborazo (QC) 001 is similar to CBa but unusual in containing shock melt and high pressure mineral phases [6]. Fountain Hills (FH) is closely related with CBa meteorites but distinct from the other CB chondrites [7]. FH contains 23 vol.% metal, significantly lower than other members of this class, it contains porphyritic chondrules, which are extremely rare in other CBa chondrites. Here we report new data on mineral chemistry, oxygen isotopic composition and bulk trace element chemistry of metal and silicate phases of SG 013 and discuss their origin. Preliminary results on SG 013 were represented by [8].”

Related posts (automatically generated):

  1. Heterogenity of planetesimal collisional plume probed by glass inclusions in metal globules of Sierra Gorda 013, an unusual CBa-like chondrite
  2. Sierra Gorda 013: Unusual CBa-like chondrite
  3. Oxygen-Isotope Compositions of Chondrules in Metal-Rich Carbonaceous Chondrites Fountain Hills and Sierra Gorda 013
  4. Sierra Gorda 009: A new member of the metal‐rich G chondrites grouplet
  5. A study of presolar material in hydrated lithic clasts from metal-rich carbonaceous chondrites
  6. Impact plume-formed and protoplanetary disk high-temperature components in CB and CH metal-rich carbonaceous chondrites
  7. Spectral reflectance variations of aubrites, metal-rich meteorites, and sulfides: Implications for exploration of (16) Psyche and other “spectrally featureless” asteroidsOPEN ACCESS 
  8. Study of Rb-Sr and Sm-Nd Isotopic Systems in Chondrules of the Sierra Gorda 009 and 013 Chondrites and Possible Mechanisms of Their Disturbance
  9. Isotopic evidence for primordial molecular cloud material in metal-rich carbonaceous chondrites
  10. Re-Os isotope systematics and fractionation of siderophile elements in metal phases from CBa chondrites
Tags: , , ,