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2022, 41(2) 307-314 DOI:
ISSN: 1004-5589 CN: 22-1111/P |
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Organic matter source of black mud shale in upper Shahezi Formation(AptianStage),Songliao Basin and its sedimentary environment |
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WANGPeng1 ,SHANXuanlong1 ,HEWentong1 ,FANDaijun1 ,SHIYuqin2 |
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1CollegeofEarthScience,JilinUniversity,Changchun130061,China;
2No3GeologicalSurveyInstituteofJilinProvince,Siping136000,Jilin,China |
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Abstract:
Basedontheanalysisofgeologicalcharacteristics,thisstudyusedorganicgeochemistry,stable isotopegeochemistryandtraceelementstoindicatethesourceoforganicmatterinthesedimentsfromtheupper memberofthelateAptianShaheziFormationwithintheSongliaoBasin,theredoxstateofthesedimentsduringlake deposition,andthepaleoclimatechange.ItisfoundthattheorganicmatterintheblackmudshaleoftheupperShaheziFormationismainlyderivedfromplanktonicmicroalgae,submergedplantsandotherlakeorganisms,including someterrestrialorganicmattersupply.Atthattime,theclimatewaswarmandhumid,andthesedimentaryenvironmentofwaterbodygraduallychangedfromnormalwaterbodytoanoxicreductionlakesedimentaryenvironment. |
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Keywords:
SongliaoBasin
ShaheziFormation
carbonandnitrogenisotopes
organicmattersource
paleoclimate
ancientenvironmen
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Received Revised Online: |
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