2022, 41(2) 307-314 DOI:     ISSN: 1004-5589 CN: 22-1111/P

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Keywords
SongliaoBasin
ShaheziFormation
carbonandnitrogenisotopes
organicmattersource
paleoclimate
ancientenvironmen
Authors
WANGPeng
SHANXuanlong
HEWentong
FANDaijun
SHIYuqin
PubMed
Article by Wangpeng
Article by Shanxuanlong
Article by Hewentong
Article by Fandaijun
Article by Shiyuqin

Organic matter source of black mud shale in upper Shahezi Formation(AptianStage),Songliao Basin and its sedimentary environment

WANGPeng1 ,SHANXuanlong1 ,HEWentong1 ,FANDaijun1 ,SHIYuqin2

1CollegeofEarthScience,JilinUniversity,Changchun130061,China; 2No3GeologicalSurveyInstituteofJilinProvince,Siping136000,Jilin,China

Abstract

Basedontheanalysisofgeologicalcharacteristics,thisstudyusedorganicgeochemistry,stable isotopegeochemistryandtraceelementstoindicatethesourceoforganicmatterinthesedimentsfromtheupper memberofthelateAptianShaheziFormationwithintheSongliaoBasin,theredoxstateofthesedimentsduringlake deposition,andthepaleoclimatechange.ItisfoundthattheorganicmatterintheblackmudshaleoftheupperShaheziFormationismainlyderivedfromplanktonicmicroalgae,submergedplantsandotherlakeorganisms,including someterrestrialorganicmattersupply.Atthattime,theclimatewaswarmandhumid,andthesedimentaryenvironmentofwaterbodygraduallychangedfromnormalwaterbodytoanoxicreductionlakesedimentaryenvironment.

Keywords SongliaoBasin   ShaheziFormation   carbonandnitrogenisotopes   organicmattersource   paleoclimate   ancientenvironmen  
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