Mapping of Compositional Diversity and Chronological Ages of Lunar Farside Multiring Mare Moscoviense Basin:Implications to the Middle Imbrian Mare Basalts  

作　　者：A.Karthi S.Arivazhagan Manish Sharma 

机构地区：[1]Centre for Applied Geology,The Gandhigram Rural Institute—Deemed to be University,Gandhigram,Dindigul-624302,Tamil Nadu,India [2]College of Natural and Health Sciences,Zayed University,P.O.Box 144534,Abu Dhabi,United Arab Emirates

出　　处：《Research in Astronomy and Astrophysics》2022年第12期130-151,共22页天文和天体物理学研究（英文版）

基　　金：the Indian Space Research Organization,Bangalore,for funding under the Ch-1 AO Research Project(ISRO/SSPO/CH-1/2016–2019)to carry out this research work。

摘　　要：The Mare Moscoviense is an astonishing rare flatland multi-ring basin and one of the recognizable mare regions on the Moon's farside.The mineralogical,chronological,topographical and morphological studies of the maria surface of the Moon provide a primary understanding of the origin and evolution of the mare provinces.In this study,the Chandrayaan-1 M^(3)data have been employed to prepare optical maturity index,FeO and TiO^(2)concentration,and standard band ratio map to detect the mafic indexes like olivine and pyroxene minerals.The crater size frequency distribution method has been applied to LROC WAC data to obtain the absolute model ages of the Moscoviense basin.The four geological unit ages were observed as 3.57 Ga(U-2),3.65 Ga(U-1),3.8 Ga(U-3)and 3.92 Ga(U-4),which could have been formed between the Imbrian and Nectarian epochs.The M^(3)imaging and reflectance spectral parameters were used to reveal the minerals like pyroxene,olivine,ilmenite,plagioclase,orthopyroxene-olivine-spinel lithology,and olivine-pyroxene mixtures present in the gabbroic basalt,anorthositic and massive ilmenite rocks,and validated with the existing database.The results show that the Moscoviense basin is dominated by intermediate TiO^(2)basalts that derived from olivine-ilmenite-pyroxene cumulate depths ranging from 200 to 500 km between 3.5 Ga and 3.6 Ga.

关 键 词：ASTROBIOLOGY molecular processes methods:data analysis techniques:image processing techniques:imaging spectroscopy techniques:spectroscopic planets and satellites:composition planets and satellites:surfaces planets and satellites:terrestrial planets 

分 类 号：P184.5[天文地球—天文学]