极地研究Issue(4)：342-351,10.DOI:10.3724/SP.J.1084.2013.00342
一块新发现月球陨石MIL090036的岩相学和矿物学
PETROGRAPHY AND MINERALOGY OF A NEW LUNAR METEORITE MIL 090036
摘要
Abstract
MIL090036 is a newly found meteorite that belongs to a feldspathic lunar breccia .The detailed petrography and mineralogy of this meteorite are investigated in this paper .It has a typical breccia texture that consists of lithic , mineral and glass clasts .The rock types of the lithic clasts are anorthosite , gabbroic anorthosite , gabbro , regolith breccia, troctolite, microporphyritic crystalline impact melt , and compound clasts .Mineral fragments include py-roxenes, plagioclase, olivine and ilmenite.Glass clasts are mainly plagioclase .The matrix is composed of melt glass, fine-grained recrystallized minerals and mineral clasts .The plagioclase grains ( An81-83 , An88-93 ) in gabbro and anorthosite clasts are relatively poorer in Ca than clasts in other breccias ( An90-98 ) .Pyroxene grains ( Fs12-35 Wo3-44 En22-79 ) in lithic, mineral and anorthositic melt clasts are relatively poorer in Fe , whereas those in gabbro clasts with melt glass and matrix are relatively enriched in Fe ( Fs 37-65 Wo10-29 En21-49 , Fs18-69 Wo3-45 En14-50 ) .The composition of pyroxene grains in gabbroic anorthosite has a narrow range ( Fs24-27 Wo7-14 En59-69 ) .Olivine grains in mineral fragments and matrix have a wider compositional range ( Fo57-79 ) than those in lithic clasts ( Fo67-77 ) .Fe/Mn molar ratios of olivine ( 47 to 83 with an average of 76 ) and those of pyroxene ( 76 to 112 ) fall in the lunar range .The characteristics of texture , mineral assemblage and composition suggest that the MIL 090036 meteorite is from an area beyond the sampling range of Apollo and Luna .Further petrographic , mineralogical and compositional studies of MIL090036 will enrich our understanding of the composition and evolution of the Moon ’ s surface .关键词
月球陨石/MIL090036/月球角砾岩/岩相学/矿物学Key words
lunar meteorite/MIL090036/lunar breccias/petrography/mineralogy引用本文复制引用
谢兰芳,缪秉魁,陈宏毅,夏志鹏,姚杰..一块新发现月球陨石MIL090036的岩相学和矿物学[J].极地研究,2013,(4):342-351,10.基金项目
国家自然科学基金（41173077）和广西隐伏金属矿产勘查重点实验室主任基金项目（13-A-01-02）资助 （）
