贵州上二叠统龙潭组煤系地层地球化学特征及物源分析:来自黔普地1井的证据
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摘要
为厘清贵州上二叠统龙潭组煤系地层的物源,以黔西南地区黔普地1井为研究对象,采集了上二叠统龙潭组的岩心进行稀土元素分析。结果表明,龙潭组的稀土总量较高(177.03×10~(-6)～592.58×10~(-6)),轻、重稀土分馏明显,稀土元素配分模式呈轻稀土富集、重稀土相对亏损的右倾型;(La/Sm)_N为2.63～4.72,(Gd/Yb)_N值为1.47～2.218,表明轻稀土分馏较重稀土严重;δEu无异常。研究表明,其形成的构造环境与大陆边缘与大陆弧相近,推测黔普地1井二叠系龙潭组物质来源以玄武岩为主。
In order to clarify the provenance of the Upper Permian Longtan Formation which is the coal measure stratum in Guizhou Province,we have collected rocks of the Longtan Formation from cores of the Qianpudi Well-1 for analyzing their rare earth elements(REE).The results show that rocks of the Longtan Formation contain relatively high contents of total rare earths elements,varying from 177.03×10~(-6)to 592.58×10~(-6),with the average∑REE content of 381.84×10~(-6).Their REE distribution patterns are right declined ones with relative LREE-enrichment,HREE-depletion,obvious fractionationbetween LREE and HREE,and no Eu anomaly.The ratios of(La/Sm)_Nand(Gd/Yb)_Nvary from 2.63 to 4.72 and from1.47 to 2.218,respectively,indicating that the fractionation of LREE is stronger than that of the HREE.This research shows that the diagenetic tectonic environment of the Longtan Formation is similar to those of the continental margin and continental arc.It is further speculated that the materials of the Upper Permian Longtan Formation in the Qianpudi Well-1could be mainly sourced from the Emeishan basalt.
In order to clarify the provenance of the Upper Permian Longtan Formation which is the coal measure stratum in Guizhou Province,we have collected rocks of the Longtan Formation from cores of the Qianpudi Well-1 for analyzing their rare earth elements(REE).The results show that rocks of the Longtan Formation contain relatively high contents of total rare earths elements,varying from 177.03×10~(-6)to 592.58×10~(-6),with the average∑REE content of 381.84×10~(-6).Their REE distribution patterns are right declined ones with relative LREE-enrichment,HREE-depletion,obvious fractionationbetween LREE and HREE,and no Eu anomaly.The ratios of(La/Sm)_Nand(Gd/Yb)_Nvary from 2.63 to 4.72 and from1.47 to 2.218,respectively,indicating that the fractionation of LREE is stronger than that of the HREE.This research shows that the diagenetic tectonic environment of the Longtan Formation is similar to those of the continental margin and continental arc.It is further speculated that the materials of the Upper Permian Longtan Formation in the Qianpudi Well-1could be mainly sourced from the Emeishan basalt.
引文
Ali J R,Thompson G M,Zhou M F,Song X Y.2005.Emeishan large igneous province,SW China.Lithos,79(3-4):475-489
Allegre C J,Minster J F.1978.Quantitative models of trace element behavior in magmatic processes.Earth Planetary Science,38:1-25
Bhatia M R.1985.Rare earth element geochemistry of Australian Paleozoic graywackes and mudrocks:Provenance and tectonic control.Sedimentary Geology,45(1-2):97-113
Blatt H,Middleton G V,Murray R C.1980.Origin of sedimentary rocks.2nd ed.Englewood Cliffs,N J:Pretice-hall,382
Boynton W V.1984.Cosmochemistry of the rare earth elements:Meteorite studies.Developments in Geochemistry,2:63-114
Fleet A J.1984.Aqueous and sedimentary geochemistry of the rare earth elements.Developments in Geochemistry,2:343-373
Floyd P A,Shail R,Leveridge B E,Franke W.1991.Geochemistry and provenance of Rhenohercyniansynorogenic sandstones:Implications for tectonic environment discrimination.Geological Society,London,Special Publications,57(1):173-188
Gu X X.1994.Geochemical characteristics of the Triassic Tethys-turbidites in northwesternSichuan,China:Implications for provenance and interpretation of the tectonic setting.GeochimicaetCosmochimica Acta,58(21):4615-4631
Haughton P D W,Todd S P,Morton A C.1991.Sedimentary provenance studies.Geological Society London Special Publications,57(1):1-11
He B,Xu Y G,Huang X L,Luo Z Y,Shi R Y,Yang Q J,Yu S Y.2007.Age and duration of the Emeishan flood volcanism,SWChina:Geochemistry and SHRIMP zircon U-Pb dating of silicic ignimbrites,post-volcanic Xuanwei Formation and clay tuff at the Chaotiansection.Earth and Planetary Science Letters,255(3-4):306-323
He B,Xu Y G,Zhong Y T,Guan J P.2010.The Guadalupian-Lopingian boundary mudstones at Chaotian(SW China)are clastic rocks rather than acidic tuffs:Implication for a temporal coincidence between the end-Guadalupian mass extinction and the Emeishanvolcanism.Lithos,119(1-2):10-19
Kroonenberg S B.1994.Effects of provenance,sorting and weathering on the geochemistry of fluvial sands from different tectonic and climatic environments.In:Proceedings of the 29thInternational Geological Congress,Part A.Kyoto,Japan:VSP International Science Publishers,69-81
Kumon F,Kiminami K.1994.Modal and chemical compositions of the representative sandstones from the Japanese Islands and their tectonic implications.In:Proceedings of the 29thInternational Geological Congress,Part A.Kyoto,Japan:VSP,135-151
Liang Q,Jing H,Gregoire D C.2000.Determination of trace elements in granites by inductively coupled plasma mass spectrometry.Talanta,51(3):507-513
Maynard J B,Valloni R,Yu H S.1982.Composition of modern deepsea sands from arc-related basins.Geological Society,London,Special Publications,10(1):551-561
Mc Lennan S M.1989.Rare earth elements in sedimentary rocks;influence of provenance and sedimentary processes.Reviews in Mineralogy and Geochemistry,21(1):169-200
Murray R W,TenBrinkM R B,Jones D L,Gerlach D C,RussIII GP.1990.Rare earth elements as indicators of different marine depositional environments in chert and shale.Geology,18(3):268-271
Pettijohn F J,Potter P E,SieverR.1972.Sand and sandstone.NewYork:Springer-Verlag,1-618
Plint A G.1995.Sedimentary facies analysis.Oxford:BlackwellScience,1-384
Van de Kamp P C,Leake B E.1985.Petrography and geochemistry of feldspathic and mafic sediments of the northeastern Pacific margin.Earth and Environmental ScienceTransactions of the Royal Society of Edinburgh,76(4):411-449
Yang J H,Cawood P A,Du Y S,Huang H,Hu L S.2014.A sedimentary archive of tectonic switching from Emeishan Plume to Indosinian orogenic sources in SW China.Journal of the Geological Society,171(2):269-280
Yang J H,Cawood P A,Du Y S.2015.Voluminous silicic eruptions during late Permian Emeishan igneous province and link to climate cooling.Earth and Planetary Science Letters,432:166-175
Yang J H,Cawood P A,Du YS,Huang H,Huang H W,Tao P.2012.Large Igneous Province and magmatic arc sourced Permian-Triassic volcanogenic sediments in China.Sedimentary Geology,261-262:120-131
Zhou M F,Arndt N T,Malpas J,Wang C Y,Kennedy A K.2008.Two magma series and associated ore deposit types in the Permian Emeishan large igneous province,SW China.Lithos,103(3-4):352-368
陈景河,徐碧良,葛广福,王军荣,林俊英,林菊连.2011.黔西南部分地区龙潭组碎屑物组成及其物源背景研究.贵州地质,28(1):9-17
杜远生,黄宏伟,黄志强,徐亚军,杨江海,黄虎.2009.右江盆地晚古生代-三叠纪盆地转换及其构造意义.地质科技情报,28(6):10-15
杜远生,黄虎,杨江海,黄宏伟,陶平,黄志强,胡丽沙,谢春霞.2013.晚古生代-中三叠世右江盆地的格局和转换.地质论评,59(1):1-11
侯伟,刘招君,王伟涛,何玉平,张雷.2007.黑龙江省东部绥滨坳陷下白垩统泥岩稀土元素地球化学特征.古地理学报,9(2):207-215
黄虎,杨江海,杜远生,黄志强,黄宏伟,郭华.2012.右江盆地北缘上二叠统碎屑岩和硅质岩地球化学特征及其地质意义.地球科学-中国地质大学学报,37(S2):81-96
廖铸敏,马路遥,陶平.2014.黔西南龙潭组微量元素地球化学特征与金矿成矿物质来源研究.贵州地质,31(1):10-20
刘俊海,杨香华,于水,吴志轩,加东辉.2003.东海盆地丽水凹陷古新统沉积岩的稀土元素地球化学特征.现代地质,17(4):421-427
牟军,罗香建,王安华,张厚松,覃永军,刘天强,吴滔.2015.贵州锦屏地区新元古代下江群地球化学特征及构造环境研究.高校地质学报,21(1):68-78.
慕熙玮,周泽.2016.六盘水矿区龙潭组元素地球化学及古沉积环境特征.中国煤炭地质,28(7):1-5,25
邵龙义,高彩霞,张超,汪浩,郭立君,高彩红.2013.西南地区晚二叠世层序-古地理及聚煤特征.沉积学报,31(5):856-866
田利,谢红东,张学东.2014.贵州盘县土城向斜南西翼二叠系龙潭组地球化学特征及意义.中国煤炭地质,26(7):15-20,32
魏震洋.2008.华南南岭地区基底变质岩的形成时代地球化学.硕士学位论文.南京:南京大学
温书鹏.2017.贵州新店井田龙潭组沉积环境及赋煤特征分析.西部探矿工程,29(4):108-110,114
于鑫,杨江海,刘建中,杜远生,柴嵘.2017.黔西南晚二叠世龙潭组物源分析及区域沉积古地理重建.地质学报,91(6):1374-1385
Allegre C J,Minster J F.1978.Quantitative models of trace element behavior in magmatic processes.Earth Planetary Science,38:1-25
Bhatia M R.1985.Rare earth element geochemistry of Australian Paleozoic graywackes and mudrocks:Provenance and tectonic control.Sedimentary Geology,45(1-2):97-113
Blatt H,Middleton G V,Murray R C.1980.Origin of sedimentary rocks.2nd ed.Englewood Cliffs,N J:Pretice-hall,382
Boynton W V.1984.Cosmochemistry of the rare earth elements:Meteorite studies.Developments in Geochemistry,2:63-114
Fleet A J.1984.Aqueous and sedimentary geochemistry of the rare earth elements.Developments in Geochemistry,2:343-373
Floyd P A,Shail R,Leveridge B E,Franke W.1991.Geochemistry and provenance of Rhenohercyniansynorogenic sandstones:Implications for tectonic environment discrimination.Geological Society,London,Special Publications,57(1):173-188
Gu X X.1994.Geochemical characteristics of the Triassic Tethys-turbidites in northwesternSichuan,China:Implications for provenance and interpretation of the tectonic setting.GeochimicaetCosmochimica Acta,58(21):4615-4631
Haughton P D W,Todd S P,Morton A C.1991.Sedimentary provenance studies.Geological Society London Special Publications,57(1):1-11
He B,Xu Y G,Huang X L,Luo Z Y,Shi R Y,Yang Q J,Yu S Y.2007.Age and duration of the Emeishan flood volcanism,SWChina:Geochemistry and SHRIMP zircon U-Pb dating of silicic ignimbrites,post-volcanic Xuanwei Formation and clay tuff at the Chaotiansection.Earth and Planetary Science Letters,255(3-4):306-323
He B,Xu Y G,Zhong Y T,Guan J P.2010.The Guadalupian-Lopingian boundary mudstones at Chaotian(SW China)are clastic rocks rather than acidic tuffs:Implication for a temporal coincidence between the end-Guadalupian mass extinction and the Emeishanvolcanism.Lithos,119(1-2):10-19
Kroonenberg S B.1994.Effects of provenance,sorting and weathering on the geochemistry of fluvial sands from different tectonic and climatic environments.In:Proceedings of the 29thInternational Geological Congress,Part A.Kyoto,Japan:VSP International Science Publishers,69-81
Kumon F,Kiminami K.1994.Modal and chemical compositions of the representative sandstones from the Japanese Islands and their tectonic implications.In:Proceedings of the 29thInternational Geological Congress,Part A.Kyoto,Japan:VSP,135-151
Liang Q,Jing H,Gregoire D C.2000.Determination of trace elements in granites by inductively coupled plasma mass spectrometry.Talanta,51(3):507-513
Maynard J B,Valloni R,Yu H S.1982.Composition of modern deepsea sands from arc-related basins.Geological Society,London,Special Publications,10(1):551-561
Mc Lennan S M.1989.Rare earth elements in sedimentary rocks;influence of provenance and sedimentary processes.Reviews in Mineralogy and Geochemistry,21(1):169-200
Murray R W,TenBrinkM R B,Jones D L,Gerlach D C,RussIII GP.1990.Rare earth elements as indicators of different marine depositional environments in chert and shale.Geology,18(3):268-271
Pettijohn F J,Potter P E,SieverR.1972.Sand and sandstone.NewYork:Springer-Verlag,1-618
Plint A G.1995.Sedimentary facies analysis.Oxford:BlackwellScience,1-384
Van de Kamp P C,Leake B E.1985.Petrography and geochemistry of feldspathic and mafic sediments of the northeastern Pacific margin.Earth and Environmental ScienceTransactions of the Royal Society of Edinburgh,76(4):411-449
Yang J H,Cawood P A,Du Y S,Huang H,Hu L S.2014.A sedimentary archive of tectonic switching from Emeishan Plume to Indosinian orogenic sources in SW China.Journal of the Geological Society,171(2):269-280
Yang J H,Cawood P A,Du Y S.2015.Voluminous silicic eruptions during late Permian Emeishan igneous province and link to climate cooling.Earth and Planetary Science Letters,432:166-175
Yang J H,Cawood P A,Du YS,Huang H,Huang H W,Tao P.2012.Large Igneous Province and magmatic arc sourced Permian-Triassic volcanogenic sediments in China.Sedimentary Geology,261-262:120-131
Zhou M F,Arndt N T,Malpas J,Wang C Y,Kennedy A K.2008.Two magma series and associated ore deposit types in the Permian Emeishan large igneous province,SW China.Lithos,103(3-4):352-368
陈景河,徐碧良,葛广福,王军荣,林俊英,林菊连.2011.黔西南部分地区龙潭组碎屑物组成及其物源背景研究.贵州地质,28(1):9-17
杜远生,黄宏伟,黄志强,徐亚军,杨江海,黄虎.2009.右江盆地晚古生代-三叠纪盆地转换及其构造意义.地质科技情报,28(6):10-15
杜远生,黄虎,杨江海,黄宏伟,陶平,黄志强,胡丽沙,谢春霞.2013.晚古生代-中三叠世右江盆地的格局和转换.地质论评,59(1):1-11
侯伟,刘招君,王伟涛,何玉平,张雷.2007.黑龙江省东部绥滨坳陷下白垩统泥岩稀土元素地球化学特征.古地理学报,9(2):207-215
黄虎,杨江海,杜远生,黄志强,黄宏伟,郭华.2012.右江盆地北缘上二叠统碎屑岩和硅质岩地球化学特征及其地质意义.地球科学-中国地质大学学报,37(S2):81-96
廖铸敏,马路遥,陶平.2014.黔西南龙潭组微量元素地球化学特征与金矿成矿物质来源研究.贵州地质,31(1):10-20
刘俊海,杨香华,于水,吴志轩,加东辉.2003.东海盆地丽水凹陷古新统沉积岩的稀土元素地球化学特征.现代地质,17(4):421-427
牟军,罗香建,王安华,张厚松,覃永军,刘天强,吴滔.2015.贵州锦屏地区新元古代下江群地球化学特征及构造环境研究.高校地质学报,21(1):68-78.
慕熙玮,周泽.2016.六盘水矿区龙潭组元素地球化学及古沉积环境特征.中国煤炭地质,28(7):1-5,25
邵龙义,高彩霞,张超,汪浩,郭立君,高彩红.2013.西南地区晚二叠世层序-古地理及聚煤特征.沉积学报,31(5):856-866
田利,谢红东,张学东.2014.贵州盘县土城向斜南西翼二叠系龙潭组地球化学特征及意义.中国煤炭地质,26(7):15-20,32
魏震洋.2008.华南南岭地区基底变质岩的形成时代地球化学.硕士学位论文.南京:南京大学
温书鹏.2017.贵州新店井田龙潭组沉积环境及赋煤特征分析.西部探矿工程,29(4):108-110,114
于鑫,杨江海,刘建中,杜远生,柴嵘.2017.黔西南晚二叠世龙潭组物源分析及区域沉积古地理重建.地质学报,91(6):1374-1385
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