| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5783581 | Geochimica et Cosmochimica Acta | 2017 | 69 Pages |
Abstract
Bulk carbon concentrations inferred from our ion probe data are 3-4Â ppm in IVA, IVB, and Tishomingo, which has IVB-like depletions of moderately volatile siderophiles. Published bulk carbon contents of IVA and IVB irons are >10 times higher suggesting contamination problems. Our ion probe analyses and observations of carbide and graphite show that bulk carbon decreases with decreasing germanium and other moderately volatile elements from group IAB, through IIAB and IIIAB, to group IVA and IVB. These trends may have been inherited from fractionated chondritic precursors, or may have been produced by impacts that caused volatile loss, separation of mantle from core material, and relatively rapid cooling of irons poor in volatiles and carbon.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geochemistry and Petrology
Authors
Joseph I. Goldstein, Gary R. Huss, Edward R.D. Scott,