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ANALYSIS OF MODERATELY SIDEROPHILE ELEMENTS IN ANGRITES: IMPLICATIONS FOR CORE FORMATION OF THE ANGRITE PARENT BODY. N. Shirai
| Content Provider | Semantic Scholar |
|---|---|
| Author | Humayun, Munir Righter, Kevin |
| Copyright Year | 2009 |
| Abstract | Angrites are an enigmatic group of achondrites, that constitute the largest group of basalts not affiliated with the Moon, Mars or Vesta (HEDs). Chemically, angrites are exceptionally refractory ele-ment-enriched (e.g., Al, Ca) and volatile element-depleted (e.g., Na and K) achondrites [1]. Highly vola-tile siderophile and chalcophile elements (Zn, Ge and Se) may be less depleted than alkalis and Ga taken to imply a fractionation of plagiophile elements [1]. Core formation on the angrite parent body (APB) is not well understood due to the dearth of moderately siderophile element (Ga, Ge, Mo, Sb, W) data for angrites, with the exception of Ni and Co [2]. In particular, there are no data for Mo abundances of angrites, while Sb and W abundances are reported for only 3 angrites, and have not always been determined on the same sample [1, 3-7]. The recent increase in angrite numbers (13) has greatly increased our knowledge of the compositional diversity of the angrite parent body (APB). In this study, we report new Co, Ni, Ga, Mo, Sb and W abun-dances for angrites by laser ablation ICP-MS in order to place constraints on core formation of the APB. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20090006972.pdf |
| Alternate Webpage(s) | http://www.lpi.usra.edu/meetings/lpsc2009/pdf/2122.pdf |
| Alternate Webpage(s) | https://www.lpi.usra.edu/meetings/lpsc2009/pdf/2122.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
