典型文献
Tracking sources and paleotectonic settings of Mesozoic sandstones in interlinked rift basins of western India:An integrated approach using petrography and heavy mineral chemistry
文献摘要：
Based on integration of field,petrographic and heavy mineral chemical data,this study highlights the source and tectonic setting of the Mesozoic sandstones of Kutch,Saurashtra,Narmada and Cambay basins at the western margin of India,formed by the progressive splitting of the eastern Gondwanaland.The Kutch Basin is dominated by arkosic sandstone,whereas Saurashtra,Narmada and Cambay basins show the pre-dominance of sub-arkose and sub-litharenite.The modal analyses of framework grains in Kutch sandstones indicate basement uplift and transitional continent settings.In contrast,the sandstones of Saurashtra,Nar-mada and Cambay basins bear imprints of recycled orogenic and craton interior belts.The presence of abraded and detrital quartz overgrowth and rounded zircons in most sandstones reveal the recycling of sediments in these basins.Tourmaline and rutile mineral compositions constrain the possible lithology of source rocks.The tourmaline mineral chemistry(Ca-Fetot-Mg plot)suggests the derivation of sediments from various sources,including Li-poor granitoids associated with pegmatites,aplites,Ca-poor metapelites,metapsammites and quartz-tourmaline-rich granitic rocks.The compositions of rutile grains(Cr vs.Nb plot)in sandstones indicate metapelitic sources.The gamut of all mineral chemical data supports the predominance of sediment sources from quartzo-feldspathic rocks with minor inputs from mafic rocks.Based on available paleocurrent data and correlation of source compositions,we infer that the Mesozoic sediments of Kutch,Saurashtra,Narmada and Cambay basins were primarily sourced by various lithologies of the Aravalli Craton.The Narmada Basin possibly received additional sediment input from the Bundelkhand Craton.
文献关键词：
中图分类号：
作者姓名：
Pawan Kumar Rajak;Angana Chaudhuri;Naraga Prabhakar;Santanu Banerjee
作者机构：
Department of Earth Sciences,Indian Institute of Technology Bombay,Powai,Mumbai 400076,India
文献出处：
引用格式：
[1]Pawan Kumar Rajak;Angana Chaudhuri;Naraga Prabhakar;Santanu Banerjee-.Tracking sources and paleotectonic settings of Mesozoic sandstones in interlinked rift basins of western India:An integrated approach using petrography and heavy mineral chemistry)[J].古地理学报（英文版）,2022(02):173-193
A类：
paleotectonic,Kutch,Saurashtra,Narmada,Cambay,Gondwanaland,arkosic,arkose,mada,abraded,Tourmaline,Fetot,pegmatites,aplites,metapelites,metapsammites,quartzo,paleocurrent,Aravalli,Bundelkhand
B类：
Tracking,sources,settings,Mesozoic,sandstones,interlinked,rift,basins,western,India,An,integrated,approach,using,petrography,heavy,mineral,chemistry,Based,integration,field,petrographic,chemical,data,this,study,highlights,margin,formed,by,progressive,splitting,eastern,Basin,dominated,whereas,show,sub,litharenite,modal,analyses,framework,grains,indicate,basement,uplift,transitional,continent,contrast,bear,imprints,recycled,orogenic,craton,interior,belts,presence,detrital,overgrowth,rounded,zircons,most,reveal,recycling,sediments,these,rutile,compositions,constrain,possible,lithology,rocks,tourmaline,Mg,plot,suggests,derivation,from,various,including,Li,poor,granitoids,associated,rich,granitic,Nb,metapelitic,gamut,supports,predominance,feldspathic,minor,inputs,mafic,available,correlation,infer,that,were,primarily,sourced,lithologies,Craton,possibly,received,additional
AB值：
0.422164
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