%0 Journal Article %T “源-汇”体系主导下的断陷湖盆陡坡带扇三角洲发育 模式探讨:以苏丹Muglad盆地Fula凹陷为例 %A 吴 %A 冬 %A 朱筱敏 %A 刘常妮 %A 李雨彤 %J 高校地质学报 %D 2015 %X 断陷湖盆陡坡带粗粒三角洲地质研究对于油气勘探至关重要。通过岩心、测井和地震资料综合分析,在苏丹Muglad 盆地Fula凹陷陡坡带识别出两类扇三角洲,分别为Jake区锥状扇三角洲和Keyi区片状扇三角洲。Jake区物源供给充足,早 白垩世持续供源,形成的锥状扇三角洲岩石颗粒较粗,分选-磨圆差,砂体厚度较厚,分布范围较广;Keyi区物源供给不 足,形成的片状扇三角洲岩石颗粒较细,分选-磨圆更好,砂体厚度较薄,分布范围有限。文章将“源-汇”体系理论引入 到陡坡带粗粒三角洲研究中,通过对母岩剥蚀供源、搬运以及汇聚条件分析,对两类扇三角洲进行成因解释,并建立相应 模式,同时指出,“源-汇”体系只有作为一个整体研究,才能较好地预测断陷湖盆陡坡带扇三角洲分布。</br>Thecoarse-graineddelta,developedinsteepslopebeltofariftbasin,usuallyplaysanimportantroleinoilandgas exploration.Basedontheanalysisofcore,loggingandseismicdata,twotypesoffandeltasarerecognizedinsteepslopebeltinthe FulaSub-basin,MugladBasin,Sudan.Thetaper-shapedfandeltainJakeAreaiscomposedofrelativelycoarse-grainedsandstoneand conglomeratewithmorethicknessandwidedistribution.Thesortingandgroundingarepoorinthistypeoffandeltadeposition.Onthe contrary,thegrainismuchfinerintheplatyfandeltainKeyiAreawhilethesortingandgroundingarerelativelygood.Thesandbody isthinandlimitedspread.ThesourceissufficientinJakeAreabutinsufficientinKeyiAreaduringtheEarlyCretaceous.Thispaper bringsthetheoryofsource-to-sinksystemintothefandeltaresearch.Throughthestudyaboutclasticsupplying,transportingand accumulating,theexplanationofthesetwotypesoffandeltasaregiven,andthedepositionalmodelsarebuilt.Onlyberegardedasa whole,thesource-to-sinksystemstudycanbeutilizedtopredictthefandeltadepositioninsteepslopebeltoftheriftbasin. %K “源-汇”体系 %K 断陷湖盆 %K 陡坡带 %K 扇三角洲 %K Fula凹陷< %K /br> %K sourcetosinksystem %K riftbasin %K steepslopebelt %K fandelta %K FulaSub-basin %U http://geology.nju.edu.cn/CN/abstract/abstract9732.shtml