FN Archimer Export Format
PT J
TI Petrology, geochemistry, and cosmic-ray exposure age of lherzolitic shergottite Northwest Africa 1950
BT 
AF GILLET, P
   BARRAT, J
   BECK, P
   MARTY, B
   GREENWOOD, R
   FRANCHI, I
   BOHN, Marcel
   COTTEN, J
AS 1:1;2:2;3:1;4:3;5:4;6:4;7:5,7;8:6;
FF 1:;2:;3:;4:;5:;6:;7:;8:;
C1 Ecole Normale Super Lyon, CNRS, UMR 5570, Lab Sci Terre, F-69364 Lyon, France.
   IUEM, CNRS, UMR 6538, UBO,Domaine Ocean, F-29280 Plouzane, France.
   CNRS, CRPG, UPR 2300, F-54501 Vandoeuvre Les Nancy, France.
   Open Univ, Planetary & Space Sci Res Inst, Milton Keynes MK7 6AA, Bucks, England.
   CNRS, UMR 6538, IFREMER, Ctr Brest, F-29280 Plouzane, France.
   Univ Brest, CNRS, UMR 6538, F-29100 Brest, France.
C2 ENS, FRANCE
   IUEM, FRANCE
   CNRS, FRANCE
   UNIV OPEN, UK
   CNRS, FRANCE
   UBO, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-DOP-DCB-GM-LGM
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-univ-france
IF 2.253
TC 47
UR https://archimer.ifremer.fr/doc/2005/publication-900.pdf
LA English
DT Article
DE ;meteorites;Atlas Mountains;shergottite;lherzolitic
AB Northwest Africa (NWA) 1950 is a new member of the lherzolitic shergottite clan of the Martian meteorites recently found in the Atlas Mountains. The petrological, mineralogical, and geochemical data are very close to those of the other known lherzolitic shergottites. The meteorite has a cumulate gabbroic texture and its mineralogy consists of olivine (FO66 to FO75), low and high-Ca pyroxenes (En(78)Fs(19)Wo(2)-En(60)FS(26)W(14); En(53)Fs(16)Wo(31)-En(45)Fs(14)Wo(41)), and plagioclase (An(57)Ab(41)Or(1) to An(40)Ab(57)Or(3); entirely converted into maskelynite during intense shock metamorphism). Accessory minerals include phosphates (merrillite), chromite and spinels, sulfides, and a glass rich in potassium. The oxygen isotopic values lie on the fractional line defined by the other SNC meteorites (Delta(17)O = 0.312 parts per thousand). The composition of NWA 1950 is very similar to the other lherzolitic shergottites and Suggests an origin from the same magmatic system, or at least crystallization from a close parental melt. Cosmogenic ages indicate an ejection age similar to those of the other lherzolitic shergottites. The intensity of the shock is similar to that observed in other shergottites, as shown by the occurrence of small melt pockets containing glass interwoven with stishovite.
PY 2005
PD AUG
SO Meteoritics and Planetary Science
SN 1086-9379
PU The Meteoritical Society
VL 40
IS 8
UT 000232753100005
BP 1175
EP 1184
ID 900
ER

EF