羌塘盆地中央隆起带南侧隆额尼-昂达尔错布曲组古油藏白云岩稀土元素特征及成因意义

永颉同心

摘　要：以系统的岩石学及沉积相分析为基础,深入探讨了隆额尼-昂达尔错古油藏白云岩及其伴生灰岩的稀土元素地球化学特征,认为该区灰岩及白云岩∑REE仍受沉积相带及沉积过程的控制,且具∑REE较低的总体特征,白云岩中HREE比LREE更具贫化的特点,这些特征均系淡水淋漓作用的结果;灰岩及白云岩在配分模式上,均为相对平坦的页岩配分模式.其中灰岩在配分模式上,在∑REE较高的情况下表现出起伏较大的特点,而白云岩在∑REE较低的情况下,表现出较为平坦的特征,白云岩化过程中稀土元素有贫化和均一的趋势;灰岩与白云岩相比,灰岩δEu值较高,而白云岩δCe较高,反映出灰岩形成于水体较深的还原环境,而白云岩形成于古地理相对高点的氧化环境.该区白云岩为混合水交代成因.
关键词：白云岩;混合水交代;稀土元素;羌塘盆地

基金项目：国家油气专项(编号:XQ2004-06)资助
作者简介：刘建清 男 1969年出生 副研究员 沉积学
作者单位：刘建清（成都地质矿产研究所沉积与能源地质研究室,成都,610082）　
　　　　　贾保江（成都地质矿产研究所沉积与能源地质研究室,成都,610082）　
　　　　　杨平（成都地质矿产研究所沉积与能源地质研究室,成都,610082）　
　　　　　陈文彬（成都地质矿产研究所沉积与能源地质研究室,成都,610082）　
　　　　　陈文西（成都地质矿产研究所沉积与能源地质研究室,成都,610082）　
　　　　　付修根（成都地质矿产研究所沉积与能源地质研究室,成都,610082）　
参考文献：

[1]赵正璋,李永铁.青藏高原中生界沉积相及油气储盖层特征[M].北京:科学出版社,2000[Zhao Zhengzhang,Li Yongtie.The features of Mesozoic Strata sedimentary facies,reservoir and seal rock in Tibet[M].Beijing:Science Press,2000]
[2]赵正璋,李永铁.青藏高原海相烃源岩的油气生成[M].北京:科学出版社,2000[Zhao Zhengzhang,Li Yongtie.The features of Mesozoic oceanic wtrata source rock in Tibet[M].Beijing:Science Press,2000]
[3]王成善,尹海生,李亚林.西藏羌塘盆地古油藏发现及其意义[J].石油与天然气地质,2004,25(2):139-143[Wang Chengshan,Yi Haisheng,Li Yalin.Discovery of paleo-oil reservoir in Qiangtang Basin in Tibet and it's geological significance[J].Oil & Gas Geology,2004,25(2):139-143]
[4]Hardie L A.Dolomitization:a critical view of some current views[J].Journal of Sedimentary Petrology,1989,59:166-183
[5]刘宝珺.沉积岩石学[M].北京:地质出版社,1985[Liu Baojun.Sedimentary Petrology[M].Beijing:Geological Publishing House,1985]
[6]高长林.陕西南岭碳酸盐岩的稀土元素特征及其古海洋学意义[J].地球化学,1992,4:383-389[Gao Changlin.REE geochemical characteristics of carbonate rocks in Southern Qinling,Shaanxi Province and their paleo-oceanological significance[J].Geochimica,1992,4:383-389]
[7]李定龙.皖北奥陶系碳酸盐岩稀土元素地球化学特征及其古岩溶意义[J].地学前缘,2000,7(2):353-365[Li Dinglong.REE geochemical features of carbonate rocks and its paleokarst significance in the Ordovician in Northern Anhui[J].Earth Science Frontiers,2000,7(2):353-365]
[8]李振宏,杨永恒.白云岩成因研究现状及进展[J].油气地质与采收率,2005,12(2):5-9[Li Zhenhong,Yang Yongheng.Present situation and progress of research dolomite genesis[J].Petroleum Geology and Recovery Efficiency,2005,12(2):5-9]
[9]邱家骧,林景仟.岩石化学[M].北京:地质出版社,1993[Qiu Jiaxiang,Lin Jingqian.Rock Geochemistry[M].Beijing:Geological Publishing House,1993]
[10]杨守业,李从先.REE示踪沉积物物源研究进展[J].地球科学进展,1999,14(2):164-167[Yang Shouye.Li Congxian.Research progress in REE tracer for sedimentary source[J].Advance in Earth Sciences.1999,14(2):164-167]
[11]Cullers R L,Basu A,Suttner L J.Geochemical signature of provenance in sand-size mineral in soil and stream near the tabacco root batholith,Montana,USA[J].Chemical Geology,1988,70:335-348
[12]Byrne R H,Kim K H.Rare earth element scanvening in sea water[J].Geochimica et Cosmochimica Acta,1990,54:2645-2656
[13]Lee J H,Byrne R H.Examination of comparative rare earth element complexation behavior using linear free-energy relationship[J].Geochimica et Cosmochimica Acta,1992,56:1127-1138
[14]Lee J H,Byrne R H.Complexation of trivalent rare earth elements (Ce,Eu,Gd,Tb,Yb) by carbonate ions[J].Geochimica et Cosmochimica Acta,1993,57:295-302
[15]Millero F J.Stability constants for the formation of rare earth element inorganic complexes as a function of ionic strength[J].Geochimica et Cosmochimica Acta,1992,56:3123-3132
[16]Cantrell K J,Byrne R H.Rare earth element complexation by carbonate and oxalate ions[J].Geochimica et Cosmochimica Acta,1987,51:597-605
[17]王中刚.稀土元素地球化学[M].北京:科学出版社,1989[Wang Zhonggang.Rare earth element geochemistry[M].Beijing:Science Press,1989]
[18]Henderson.General geochemical properties and abundances of rare element[C]//Henderson P ed.Rare earth element geochemistry.New York:Elsevier,1984:1-30
[19]熊应乾,刘振夏,杜德文.东海陆架EA01孔常微量元素变化及意义[J].沉积学报,2006,24(3):356-364[Xiong Yingqian,Liu Zhenxia,Du Dewen.Variation and its implication of major and trace element EA01 from the continental shelf of East China Sea[J].Acta Sedimentologica Sinica,2006,24(3):356-364]

housex

谢谢楼主分享

goodminer

谢谢谢谢谢

小普

学习一下

行者——洲

继续学习 继续进步