本文選題：地球化學 + 沉積相�。� 參考：《山東科技大學》2017年碩士論文

【摘要】：新疆西大龍口下倉房溝群地層由下而上分為泉子街組、梧桐溝組和鍋底坑組。通過對研究區(qū)露頭剖面的實測,詳細觀察了研究區(qū)的巖石類型、沉積構(gòu)造及其組合特征,分析了沉積相和亞相,從而總結(jié)出沉積環(huán)境特征。研究區(qū)剖面出露較好,沉積標志豐富,沉積相標志明顯。沉積相類型主要為河流相、三角洲相和湖泊相。本文根據(jù)V/Cr、Ni/Co、δEu、δCe、Sr/Cu、Sr/Ba比值等化學參數(shù)表明,研究區(qū)沉積環(huán)境為氧化環(huán)境,淡水湖,氣候由干旱逐漸轉(zhuǎn)變?yōu)闈駶?再轉(zhuǎn)變?yōu)榘敫珊怠８鶕?jù)稀土—微量元素豐度及組合分析,發(fā)現(xiàn)研究區(qū)物源來自大陸邊緣上地殼的長英質(zhì)巖石,并伴有火山巖混入,源區(qū)構(gòu)造環(huán)境為大陸島弧。通過飽和烴GC—MS等地球化學測試技術(shù),對新疆西大龍口梧桐溝組—鍋底坑組烴源巖有機質(zhì)豐度、有機質(zhì)類型和有機質(zhì)成熟度等指標參數(shù)分析,對該套烴源巖的生烴能力進行初步評價。研究表明,該套烴源巖有機質(zhì)豐度中等,有機質(zhì)類型為Ⅱ型、Ⅲ型;有機質(zhì)演化主體上已進入成熟階段,有機質(zhì)來源主要為陸生高等植物,同時也有水生生物。本文對新疆西大龍口下倉房溝群沉積環(huán)境綜合分析,研究地質(zhì)沉積時的古地理、古環(huán)境,給在研究區(qū)做沉積地質(zhì)的研究者提供幫助,從而為研究區(qū)油氣資源的勘探與開發(fā)提供參考。
[Abstract]:The lower Cangfanggou group in West Dalong mouth of Xinjiang is divided into three groups from bottom to top: Quanzijie formation, Wutonggou formation and Guodikeng formation.In this paper, the types of rocks, sedimentary structures and their assemblages in the study area are observed in detail, and the sedimentary facies and subfacies are analyzed, and the sedimentary environment characteristics are summarized through the measurement of outcrop profile in the study area.The profile of the study area is good, the sedimentary mark is abundant, and the sedimentary facies mark is obvious.The sedimentary facies are mainly fluvial facies, delta facies and lacustrine facies.According to the chemical parameters such as V / Cr / Ni / Co, 未 EU, 未 CeS / Cu / Cu / Ba ratio, the sedimentary environment of the studied area is oxidation environment, and the climate of freshwater lake is gradually changed from drought to wetness and then to semi-arid.Based on the abundance and assemblage analysis of rare earths and trace elements, it is found that the source material of the study area comes from the felsic rocks in the upper crust of the continental margin, with volcanic rocks mixed in, and the tectonic environment of the source region is continental island arc.Based on the geochemical measurement techniques such as saturated hydrocarbon (GC-MS), the organic matter abundance, organic matter type and maturity of source rock of Wutonggou formation and Guodikeng formation in West Dalong mouth, Xinjiang are analyzed.The hydrocarbon generating ability of this set of source rocks was preliminarily evaluated.The results show that the organic matter abundance of the source rocks is moderate, the organic matter types are type 鈪，

本文編號：1735011