Organic Matter in Carbonaceous Chondrites

The association between organic matter and clay minerals in carbonaceous chondrites

Carbonaceous Nanospheres in Chondrites

Introduction: In the 1960s, prior to the widespread use of TEMs, several papers described rounded, micron-sized organic particles from carbonaceous chondrite (CC) meteorites [1-3]. Some of these particles were hollow. Except for two early TEM studies [4, 5], the rounded structures were essentially neglected until similar material was discovered in the Tagish Lake meteorite [6]. We subsequently ...

Spectral reflectance properties of carbonaceous chondrites: 3. CR chondrites

Powdered samples of a suite of 14 CR and CR-like chondrites, ranging from petrologic grade 1 to 3, were spectrally characterized over the 0.3–2.5 lm interval as part of a larger study of carbonaceous chondrite reflectance spectra. Spectral analysis was complicated by absorption bands due to Fe oxyhydroxides near 0.9 lm, resulting from terrestrial weathering. This absorption feature masks expect...

QUANTITATIVE STUDY OF ETHER GROUP MOLECULES IN INSOLUBLE ORGANIC MATTER FROM CARBONACEOUS CHONDRITES BY CuO-NaOH SELECTIVE DEGRADATION

Introduction: It has long been known that insoluble organic matter (IOM) in carbonaceous chondrites is complex and macromolecular in nature, and that it constitutes the major portion of chondritic organics. Structural characterization of IOM is one of the most important approaches for determining the formation process of the IOM. Recent NMR analyses of the IOM [1, 2, 3, 4] from a variety of car...

Spectral reflectance properties of carbonaceous chondrites: 8. ‘‘Other’’ carbonaceous chondrites: CH, ungrouped, polymict, xenolithic inclusions, and R chondrites

Department of Geography, University of Winnipeg, 515 Portage Avenue, Winnipeg, Manitoba, Canada R3B 2E9 Astromaterials Research and Exploration Science Office, NASA Johnson Space Center, Mail Code KR, 2101 NASA Road 1, Houston, TX 77058-3696, USA Department of Geological Sciences, Brown University, Box 1846, Providence, RI 02912-1846, USA Department of Space Studies, University of North Dakota,...