鄂尔多斯盆地东南部延长组微量元素地球化学特征及环境指示意义
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摘要
对鄂尔多斯盆地东南部延长组不同层位的62件泥岩样品进行微量元素测试,并对35件泥岩样品进行常量元素测试,结合岩石学和古生物学特征对研究区的古沉积环境进行定量-半定量分析。研究表明,Li,Sr,Ni,Ga和Sr/Ba数值都指示研究区为淡水环境,偶有咸水注入;δU,U/Th,V/(V+Ni),V/Cr和Ni/Co数值指示研究区为半氧化半还原-氧化环境,局部存在还原环境;根据Co元素含量计算出延长组平均最大古水深59. 17 m,结合岩石学和古生物特征,认为长7最大古水深大于50 m; Sr/Cu,CaO/(MgO×Al2O3)和Mg/Ca数值指示研究区为温暖湿润的气候,气温略低于纸坊组时期。
Trace elements of sedimentary rocks is sensitive to the changes of sedimentary water body. In the research on the southeastern Ordos Basin,62 mudstone samples at different stratums are tested for trace elements,and 35 samples are tested for macroelements,and the paleosedimentary environment is analyzed quantitatively and semi-quantitatively by combining petrological and paleobiological characteristics. Studies show that the values of Li,Sr,Ni,Ga and Sr/Ba indicate the freshwater environment with occasional saltwater injection. The values of δU,U/Th,V/( V + Ni),V/Cr and Ni/Co indicate the semi-oxidation and semi-reduction to oxidation environment,and local reduction environments exist. According to the content of Co,the average depth of water in Yanchang Formation is 59. 17 m. In combination with petrological and palaeontological features,it is considered that the maximum depth of water in Chang 7 is greater than 50 m. Sr/Cu,CaO/( MgO × Al_2O_3) and Mg/Ca values indicate a warm and humid climate,with the temperature slightly lower than that of Zhifang Formation.
Trace elements of sedimentary rocks is sensitive to the changes of sedimentary water body. In the research on the southeastern Ordos Basin,62 mudstone samples at different stratums are tested for trace elements,and 35 samples are tested for macroelements,and the paleosedimentary environment is analyzed quantitatively and semi-quantitatively by combining petrological and paleobiological characteristics. Studies show that the values of Li,Sr,Ni,Ga and Sr/Ba indicate the freshwater environment with occasional saltwater injection. The values of δU,U/Th,V/( V + Ni),V/Cr and Ni/Co indicate the semi-oxidation and semi-reduction to oxidation environment,and local reduction environments exist. According to the content of Co,the average depth of water in Yanchang Formation is 59. 17 m. In combination with petrological and palaeontological features,it is considered that the maximum depth of water in Chang 7 is greater than 50 m. Sr/Cu,CaO/( MgO × Al_2O_3) and Mg/Ca values indicate a warm and humid climate,with the temperature slightly lower than that of Zhifang Formation.
引文
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[5]付金华,李士祥,刘显阳,等.鄂尔多斯盆地上三叠统延长组长9油层组沉积相及其演化[J].古地理学报,2012,14(3):269-284.
[6]徐梦龙,何治亮,尹伟,等.鄂尔多斯盆地镇泾地区延长组8段致密砂岩储层特征及主控因素[J].石油与天然气地质,2015,36(2):240-247.
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[11]武富礼,李文厚,李玉宏,等.鄂尔多斯盆地上三叠统延长组三角洲沉积及演化[J].古地理学报,2004,6(3):307-315.
[12]曹红霞,李文厚,陈全红,等.鄂尔多斯盆地南部晚三叠世沉降与沉积中心研究[J].大地构造与成矿学,2008,32(2):159-164.
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[16]王峰,刘玄春,邓秀芹,等.鄂尔多斯盆地纸坊组微量元素地球化学特征及沉积环境指示意义[J].沉积学报,2017,35(6):1265-1273.
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[18] KIMURA H,WATANABE Y. Ocean anoxia at the Precambrian-Cambrian boundary[J]. Geology,2001,29:995-998.
[19]常华进,储雪蕾,冯连君,等.氧化还原敏感微量元素对古海洋沉积环境的指示意义[J].地质论评,2009,55(1):91-99.
[20]刘安,李旭兵,王传尚,等.湘鄂西寒武系烃源岩地球化学特征与沉积环境分析[J].沉积学报,2013,31(6):1122-1132.
[21]徐崇凯,刘池洋,郭佩,等.潜江凹陷古近系潜江组盐间泥岩地球化学特征及地质意义[J].沉积学报,2018,36(3):617-629.
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[23] JONES B J,MANNING A C. Comparison of Geochemical indices used for the interpretation palaeoredox conditions in ancient mudstone[J]. Chemical Geology,1994,111(1-4):111-129.
[24] WIGNALL P B,TWITCHETT R J. Oceanic anoxia and the end Permian mass extinction[J]. Science,1996,272:1155-1158.
[25] RIMMER S M. Geochemical paleoredox indicators in Devonian-Mississippian black shales,Central Appalachian Basin(USA)[J]. Chemical Geology,2004,206(3/4):373-391.
[26] SCHEFFLER K,BUEHMANN D,SCHWARK L. Analysis of late Palaeozoic glacial to postglacial sedimentary successions in South Africa by geochemical proxies:Response to climate evolution and sedimentary environment[J]. Palaeogeography,Palaeoclimatology,Palaeoecology,2006,240(1/2):184-203.
[27]周洪瑞.华北地台南部中新元古界层系地层研究[M].北京:地质出版社,1999.
[28]吴智平,周瑶琪.一种计算沉积速率的新方法———宇宙尘埃特征元素法[J].沉积学报,2000,18(3):395-399.
[29]张才利,高阿龙,刘哲,等.鄂尔多斯盆地长7油层组沉积水体及古气候特征研究[J].天然气地球科学,2011,22(4):582-587.
[30]傅强,徐铮,姚泾利,等.鄂尔多斯盆地延长组遗迹化石组合与古环境[J].同济大学学报(自然科学版),2018,46(5):695-700.
[31]杨华,傅强,齐亚林,等.鄂尔多斯盆地晚三叠世延长期古湖盆生物相带划分及地质意义[J].沉积学报,2016,34(4):688-693.
[32]邓宏文,钱凯.沉积地球化学与环境分析[M].兰州:甘肃科学技术出版社,1993:95-104.
[33]范玉海,屈红军,王辉,等.微量元素分析在判别沉积介质环境中的应用———以鄂尔多斯盆地西部中区晚三叠世为例[J].中国地质,2012,39(2):382-389.
[34]梁文君,肖传桃,肖凯,等.藏北安多晚侏罗世古环境、古气候与地球化学元素关系研究[J].中国地质,2015 42(4):1079-1091.
[35]谭聪.鄂尔多斯盆地上二叠统—中上三叠统沉积特征及古气候演化[D].北京:中国地质大学(北京),2017.
[2] ALGEO T J,MAYNARD J B. Trace-element behavior and redox facies in core shales of Upper Pennsylvanian Kansas-type cyclothems[J]. Chemical Geology,2004,206:289-318.
[3] MCLENNAN S M,HEMMING S R,MCDANIEL D K,et al. Geochemical approaches to sedimentation,provenance and tectonics[J]. Special Paper of the Geological Society of America,1993,284:21-40.
[4]付国民,赵俊兴,张志升,等.鄂尔多斯盆地东南缘三叠系延长组物源及沉积体系特征[J].矿物岩石,2010,30(1):99-105.
[5]付金华,李士祥,刘显阳,等.鄂尔多斯盆地上三叠统延长组长9油层组沉积相及其演化[J].古地理学报,2012,14(3):269-284.
[6]徐梦龙,何治亮,尹伟,等.鄂尔多斯盆地镇泾地区延长组8段致密砂岩储层特征及主控因素[J].石油与天然气地质,2015,36(2):240-247.
[7]户瑞宁,操应长,葸克来,等.鄂尔多斯盆地南缘长10—长9油层组沉积特征[J].大庆石油地质与开发,2018,37(1):31-39.
[8]范萌萌.鄂尔多斯盆地东南部延长组沉积相研究[D].西安:西北大学,2010.
[9]范萌萌,卜军,曾家明,等.鄂尔多斯盆地东南部晚三叠世延长期沉积相及岩相古地理演化特征[J].石油地质与工程,2012,26(4):9-14.
[10]王新民,郭彦如,付金华,等.鄂尔多斯盆地延长组长8段相对高孔渗砂岩储集层的控制因素分析[J].石油勘探与开发,2005,32(2):35-38.
[11]武富礼,李文厚,李玉宏,等.鄂尔多斯盆地上三叠统延长组三角洲沉积及演化[J].古地理学报,2004,6(3):307-315.
[12]曹红霞,李文厚,陈全红,等.鄂尔多斯盆地南部晚三叠世沉降与沉积中心研究[J].大地构造与成矿学,2008,32(2):159-164.
[13]李文厚,庞军刚,曹红霞,等.鄂尔多斯盆地晚三叠世延长期沉积体系及岩相古地理演化[J].西北大学学报(自然科学版),2009,39(3):501-506.
[14]王益友,吴萍.江浙海岸带沉积物的地球化学标志[J].同济大学学报(自然科学版),1983(4):82-90.
[15]田景春,张翔.沉积地球化学[M].北京:地质出版社,2016:63-77.
[16]王峰,刘玄春,邓秀芹,等.鄂尔多斯盆地纸坊组微量元素地球化学特征及沉积环境指示意义[J].沉积学报,2017,35(6):1265-1273.
[17] RUSSELL A D,MORFORD J L. The behavior of redox-sensitive metals across a laminated-massive-laminated transition in Saanich Inlet,British Columbia[J].Marine Geology,2001,174:341-354.
[18] KIMURA H,WATANABE Y. Ocean anoxia at the Precambrian-Cambrian boundary[J]. Geology,2001,29:995-998.
[19]常华进,储雪蕾,冯连君,等.氧化还原敏感微量元素对古海洋沉积环境的指示意义[J].地质论评,2009,55(1):91-99.
[20]刘安,李旭兵,王传尚,等.湘鄂西寒武系烃源岩地球化学特征与沉积环境分析[J].沉积学报,2013,31(6):1122-1132.
[21]徐崇凯,刘池洋,郭佩,等.潜江凹陷古近系潜江组盐间泥岩地球化学特征及地质意义[J].沉积学报,2018,36(3):617-629.
[22] HATCH J R. Relationship between inferred redox potential of the depositional environment and geochemistry of the Upper Pennsylvanian(Missourian)Stark Shale Member of the Dennis Limestone,Wabaunsee county,Kansas,U. S. A.[J]. Chemical Geology,1992,99(1-3):65-82.
[23] JONES B J,MANNING A C. Comparison of Geochemical indices used for the interpretation palaeoredox conditions in ancient mudstone[J]. Chemical Geology,1994,111(1-4):111-129.
[24] WIGNALL P B,TWITCHETT R J. Oceanic anoxia and the end Permian mass extinction[J]. Science,1996,272:1155-1158.
[25] RIMMER S M. Geochemical paleoredox indicators in Devonian-Mississippian black shales,Central Appalachian Basin(USA)[J]. Chemical Geology,2004,206(3/4):373-391.
[26] SCHEFFLER K,BUEHMANN D,SCHWARK L. Analysis of late Palaeozoic glacial to postglacial sedimentary successions in South Africa by geochemical proxies:Response to climate evolution and sedimentary environment[J]. Palaeogeography,Palaeoclimatology,Palaeoecology,2006,240(1/2):184-203.
[27]周洪瑞.华北地台南部中新元古界层系地层研究[M].北京:地质出版社,1999.
[28]吴智平,周瑶琪.一种计算沉积速率的新方法———宇宙尘埃特征元素法[J].沉积学报,2000,18(3):395-399.
[29]张才利,高阿龙,刘哲,等.鄂尔多斯盆地长7油层组沉积水体及古气候特征研究[J].天然气地球科学,2011,22(4):582-587.
[30]傅强,徐铮,姚泾利,等.鄂尔多斯盆地延长组遗迹化石组合与古环境[J].同济大学学报(自然科学版),2018,46(5):695-700.
[31]杨华,傅强,齐亚林,等.鄂尔多斯盆地晚三叠世延长期古湖盆生物相带划分及地质意义[J].沉积学报,2016,34(4):688-693.
[32]邓宏文,钱凯.沉积地球化学与环境分析[M].兰州:甘肃科学技术出版社,1993:95-104.
[33]范玉海,屈红军,王辉,等.微量元素分析在判别沉积介质环境中的应用———以鄂尔多斯盆地西部中区晚三叠世为例[J].中国地质,2012,39(2):382-389.
[34]梁文君,肖传桃,肖凯,等.藏北安多晚侏罗世古环境、古气候与地球化学元素关系研究[J].中国地质,2015 42(4):1079-1091.
[35]谭聪.鄂尔多斯盆地上二叠统—中上三叠统沉积特征及古气候演化[D].北京:中国地质大学(北京),2017.