FN Archimer Export Format
PT J
TI Petrology and geochemistry of Northwest Africa 5480 diogenite and evidence for a basin-forming event on Vesta
BT 
AF YAMAGUCHI, A.
   BARRAT, Jean-Alix
   SHIRAI, N.
   EBIHARA, M.
AS 1:1,2;2:3;3:4;4:1,4;
FF 1:;2:;3:;4:;
C1 Natl Inst Polar Res, Tachikawa, Tokyo 1908518, Japan.
   SOKENDAI, Sch Multidisciplinary Sci, Dept Polar Sci, Tokyo 1908518, Japan.
   CNRS UMR 6538, UBO IUEM, F-29280 Plouzane, France.
   Tokyo Metropolitan Univ, Grad Sch Sci, Hachioji, Tokyo 1920397, Japan.
C2 NATL INST POLAR RES, JAPAN
   SOKENDAI, JAPAN
   CNRS, FRANCE
   UNIV TOKYO METROPOLITAN, JAPAN
UM LGO
IF 2.819
TC 8
UR https://archimer.ifremer.fr/doc/00639/75131/75519.pdf
LA English
DT Article
AB We performed a petrological and geochemical study of an olivine diogenite, Northwest Africa (NWA) 5480. NWA 5480 is a crystalline stone, but shows a heterogeneous texture. Olivine aggregates and grains of olivine and chromite display resorption textures set in a crystalline pyroxene matrix. Large olivine aggregates are penetrated by pyroxene matrix. Flow textures are observed near olivine aggregates. Olivine, chromite, and pyroxene show minor chemical zoning, implying relatively rapid cooling. NWA 5480 contains a significant amount of platinum group elements with chondritic relative proportions. All this evidence supports that NWA 5480 is an impact-melt breccia from a target composed of olivine and pyroxene-rich lithologies. Such impact melt would have formed by melting crustal materials, possibly during one of the impacts that formed the South Pole basins on Vesta. 
PY 2015
PD JUN
SO Meteoritics & Planetary Science
SN 1086-9379
PU Wiley
VL 50
IS 7
UT 000358126000007
BP 1260
EP 1270
DI 10.1111/maps.12470
ID 75131
ER

EF