Abstract:

GRV 99027 meteorite from Blue Ice Area in Antarctica is an achondrite. It consists predominantly of olivine and pyroxene. Both cumulate texture and poikilitic texture can be seen in this achondrite. These textures are peculiar to fractional crystallization of magma. The modal mineralogical composition and chemical compositions for GRV 99027 meteorite are similar to those of SNC meteorites and especially approach to ALHA 77005 meteorite. The latter has been ascertained to be a Martain meteorite of Lherozolitic-Shergotty type ( L-S type). Its mineral chemical chracteristics and FeO/MnO ratio are also similar to those of L-S type. Based on above - mentioned the authors consider that GRV 99027 meteorite is tentatively a new member of SNC meteorite clan. It is reported that SNC meteorites may be from the Mars. Due to Lherozolites correspond to composition of the mantle in the Earth, the GRV 99027 meteorite could originally occur in the depths of the Mars. Therefore, the new achondrite provides a rare sample from other planetary in the solar system and has an important significance in study on the Mars. The sample we got is very small that the research work for the achondrite is preliminary merely. To draw final conclusion ascertained GRV99027 to be a Martain meteorite many work ( such as oxygen and inert gas composition analysis, radiometric isotopic age determination and some others) should be done.