THE PARENT MAGMA OF THE NAKHLITE METEORITES - CLUES FROM MELT INCLUSIONS

被引:78
作者
HARVEY, RP
MCSWEEN, HY
机构
[1] Department of Geological Sciences, University of Tennessee, Knoxville
关键词
D O I
10.1016/0012-821X(92)90197-4
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
Several forms of trapped liquid found within nakhlite meteorites have been examined, including interstitial melt and magmatic inclusions within the cores of large olivine grains. Differences in the mineralogy and texture between two types of trapped melt inclusions, and between these inclusions and the mesostasis, indicate that vitrophyric inclusions are most appropriate for estimating the composition of a nakhlite parental magma in equilibrium with early-forming olivine and augite. Parent liquids were calculated from the mineralogy of large inclusions in Nakhla and Governador Valadares using a system of mass-balance equations solved by linear regression methods. The chosen parental liquids were cosaturated in olivine and augite and had Mg/Fe values consistent with measured augite/liquid K(d)'s. These parental magma compositions are similar to other published compositions for Nakhla, Chassigny and Shergotty parental melts, and may correspond to a significant magma type on Mars.
引用
收藏
页码:467 / 482
页数:16
相关论文
共 19 条
[1]  
BERKLEY JL, 1980, P LUNAR PLANET SCI C, V11, P1089
[2]  
Bunch T. E., 1975, Meteoritics, V10, P303, DOI 10.1111/j.1945-5100.1975.tb01187.x
[3]  
DEER WA, 1978, INTRO ROCK FORMING M, P152
[4]   CHASSIGNY METEORITE - CUMULATE DUNITE WITH HYDROUS AMPHIBOLE-BEARING MELT INCLUSIONS [J].
FLORAN, RJ ;
PRINZ, M ;
HLAVA, PF ;
KEIL, K ;
NEHRU, CE ;
HINTHORNE, JR .
GEOCHIMICA ET COSMOCHIMICA ACTA, 1978, 42 (08) :1213-1229
[5]   PETROGENESIS OF THE NAKHLITE METEORITES - EVIDENCE FROM CUMULATE MINERAL ZONING [J].
HARVEY, RP ;
MCSWEEN, HY .
GEOCHIMICA ET COSMOCHIMICA ACTA, 1992, 56 (04) :1655-1663
[6]  
HARVEY RP, 1991, METEORITICS, V26, P343
[7]  
HARVEY RP, 1992, LUNAR PLANET SCI, V23, P499
[8]   CHASSIGNY PETROGENESIS - MELT COMPOSITIONS, INTENSIVE PARAMETERS, AND WATER CONTENTS OF MARTIAN (QUESTIONABLE) MAGMAS [J].
JOHNSON, MC ;
RUTHERFORD, MJ ;
HESS, PC .
GEOCHIMICA ET COSMOCHIMICA ACTA, 1991, 55 (01) :349-366
[9]  
Lofgren G. E., 1980, PHYSICS MAGMATIC PRO, P487
[10]  
LONGHI J, 1991, AM MINERAL, V76, P785