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Early Cretaceous aquatic algae and algal laminae from the Jiuquan Basin, northwestern China: Evidence of the oil precursors for terrestrial source rocks

文献类型：期刊论文

作者Zhang, Mingzhen1,2; Zhu, Youhua2; Ji, Liming1; Dou, Longhui3; Zhumahun, Abduljan3; Yuan, Bochao4; Zhu, Youhua （祝幼华）
刊名CRETACEOUS RESEARCH
出版日期2020
卷号105页码:12
关键词Dinoflagellate cysts Algae laminae Source rock Cretaceous Jiuquan basin
ISSN号0195-6671
DOI10.1016/j.cretres.2019.06.011
英文摘要Aquatic algae are the main biotic source of organics in both marine and terrestrial hydrocarbon source rocks. Unlike marine deposits, fossil evidence of algal remains in terrestrial source rocks is rare, especially in pre-Cenozoic rocks. However, abundant algae-related biomarkers are commonly found in terrestrial oil-bearing basins. We conducted a palynological study of the source rocks in the Lower Cretaceous Xiagou Formation in the Jiuquan Basin, northwestern China. The abundant planktonic algae comprise dinoflagellate cysts (Zhongyuandinium decorosum, Parabohaidina (Conicoidium) tuberculata and Palaeoperidinium sp.) and chlorophyta (Botryococcus sp. and Tetrash um multifilorum). These algae are extremely transparent, which makes their identification difficult. However, they show high yellow fluorescence under blue light which increases the clarity of surface ornamentation. In addition, the Lower Cretaceous Xiagou Formation is characterized by fine laminated deposits. The lamination consists of light- and dark-colored laminae couplets with thickness of approximately 0.03-0.5 mm. The dark laminae are rich in algae and amorphous organic matter (AOM). Algal remains are densely distributed along the bedding surface and show a strong yellow color under blue fluorescence. The algal remains probably played an important role in oil-generating microlayers in the source rock. In contrast, the organic components in the light-colored laminae are dominated by phytoclasts. Additionally, the biomarkers 4-methylsterane and dinosterane have also been detected in fossil-bearing beds, providing further evidence that dinoflagellate cysts flourished in the Jiuquan Basin during the Early Cretaceous. Thus, these aquatic algae are not only the likely source of oil in the Lower Cretaceous source rocks in the Jiuquan Basin but also suggest that blooms of early dinoflagellate cysts occurred in continental interiors during the Early Cretaceous. Published by Elsevier Ltd.
WOS关键词MOLECULAR EVIDENCE ; 4-METHYL STEROLS ; LAKE ; SEDIMENTS ; FOSSILS ; CLASSIFICATION ; PALYNOFACIES ; DINOSTERANES ; PROVINCE ; ORIGIN
资助项目National Natural Science Foundation of China[41602023] ; National Natural Science Foundation of China[41672137] ; Youth Innovation Promotion Association CAS (Chinese Academy of Sciences), Key Laboratory Project of Gansu Province[1309RTSA041] ; Key Laboratory of Economic Stratigraphy and Palaeogeography, Chinese Academy of Sciences (Nanjing Institute of Geology and Palaeontology)[2017KF01] ; Second Tibetan Plateau Scientific Expedition (STEP) program[2019QZKK0704]
WOS研究方向Geology ; Paleontology
语种英语
WOS记录号WOS:000504515900011
出版者ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
资助机构National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS (Chinese Academy of Sciences), Key Laboratory Project of Gansu Province ; Key Laboratory of Economic Stratigraphy and Palaeogeography, Chinese Academy of Sciences (Nanjing Institute of Geology and Palaeontology) ; Second Tibetan Plateau Scientific Expedition (STEP) program
源URL[http://ir.nigpas.ac.cn/handle/332004/29862]  
专题中国科学院南京地质古生物研究所
通讯作者Zhang, Mingzhen; Zhu, Youhua; Zhu, Youhua （祝幼华）
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources, Gansu Prov Key Lab Petr Resources Res, Lanzhou 730000, Gansu, Peoples R China
2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Key Lab Econ Stratig & Palaeogeog, 39 East Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
3.Xinjiang Uygur Autonomous Region Coalfield Geol B, Comprehens Geol Explorat Team, Urumqi 830009, Peoples R China
4.PetroChina Yumen Oilfield Co, Res Inst Explorat & Dev, Jiuquan 735019, Gansu, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Mingzhen,Zhu, Youhua,Ji, Liming,et al. Early Cretaceous aquatic algae and algal laminae from the Jiuquan Basin, northwestern China: Evidence of the oil precursors for terrestrial source rocks[J]. CRETACEOUS RESEARCH,2020,105:12.
APA Zhang, Mingzhen.,Zhu, Youhua.,Ji, Liming.,Dou, Longhui.,Zhumahun, Abduljan.,...&Zhu, Youhua .(2020).Early Cretaceous aquatic algae and algal laminae from the Jiuquan Basin, northwestern China: Evidence of the oil precursors for terrestrial source rocks.CRETACEOUS RESEARCH,105,12.
MLA Zhang, Mingzhen,et al."Early Cretaceous aquatic algae and algal laminae from the Jiuquan Basin, northwestern China: Evidence of the oil precursors for terrestrial source rocks".CRETACEOUS RESEARCH 105(2020):12.

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来源：南京地质古生物研究所

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