炭山地区延安组下部泥质岩元素地球化学特征及其地质意义——以固油-1井为例
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摘要
炭山地区的沉积背景归属长时间存在争议,前人将其划分为山间盆地,与鄂尔多斯盆地相对独立。本次研究采集固油-1油页岩调查钻孔所获延安组下部泥质岩岩心样品,通过微量元素、稀土元素以及稀散元素的分析测试,恢复了延安组下部沉积水体环境、古盐度、氧化还原条件,同时通过对比研究证实了炭山地区延安组沉积物源除来自于基底沉积地层以外,还有南华山—西华山一带早古生代花岗岩和长城系海原岩群的物源供给,印证了炭山地区沉积范围较广,推测其为鄂尔多斯盆地的一部分,并且在六盘山盆地内部可能赋存有厚层延安组。
The sedimentary setting of the Tanshan area has been in dispute for a long time. Previous studies have put the area into an intermountain basin,relatively independent from the Ordos Basin. This study has acquired the Yan'an Formation lower part argillaceous rock core samples from an oil shale survey drilling well GY-1,through trace element,REE and sparse element analysis and testing,has restored Yan'an Formation lower part water body environment,paleosalinity and redox condition. Meanwhile,through contrast study has confirmed Tanshan area Yan'an Formation sediments provenance besides basement sedimentary strata,still has the Nanhuashan-Xihuashan region early Paleozoic granite and Changcheng System Haiyuan rock group material supplies,thus confirmed Tanshan area has wider sedimentary extent. Accordingly inferred that the area is a part of Ordos Basin and in the Liupanshan Basin possibly occur thick Yan'an Formation deposits.
The sedimentary setting of the Tanshan area has been in dispute for a long time. Previous studies have put the area into an intermountain basin,relatively independent from the Ordos Basin. This study has acquired the Yan'an Formation lower part argillaceous rock core samples from an oil shale survey drilling well GY-1,through trace element,REE and sparse element analysis and testing,has restored Yan'an Formation lower part water body environment,paleosalinity and redox condition. Meanwhile,through contrast study has confirmed Tanshan area Yan'an Formation sediments provenance besides basement sedimentary strata,still has the Nanhuashan-Xihuashan region early Paleozoic granite and Changcheng System Haiyuan rock group material supplies,thus confirmed Tanshan area has wider sedimentary extent. Accordingly inferred that the area is a part of Ordos Basin and in the Liupanshan Basin possibly occur thick Yan'an Formation deposits.
引文
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[3]高德燚,平文文,胡宝林,等.淮南煤田山西组泥页岩微量元素地球化学特征及其意义[J].煤田地质与勘探,2017,45(02):14-21.
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[15]许中杰,程日辉,王嘹亮,等.广东东莞地区中侏罗统塘厦组凝灰质沉积物的元素地球化学特征及构造背景[J].岩石学报,2010,26(1):352-360.
[16]李智超,李永项,李文厚,等.甘肃兰州盆地古近系泥岩的古盐度分析[J].地质科学,2016,(4):1344-1356.
[17]张天福,孙立新,张云,等.鄂尔多斯盆地北缘侏罗纪延安组、直罗组泥岩微量、稀土元素地球化学特征及其古沉积环境意义[J].地质学报,2016,90(12):3454-3472.
[18]Tribovillard N,Algeo T J,Lyons T,et al. Trace metals as paleoredonx and paleoproductivity proxies:An update[J]. Chemical Geology,2006,232(1/2):12-32.
[19]吴灿灿,陈松,李俊,郭锤.皖北宿州地区寒武系豹皮灰岩地球化学特征及其地质意义[J].地质与勘探,2018,54(01):90-101.
[20]张鲲,徐德明,胡俊良,等.广西梧州思委银矿区花岗岩的岩石成因:锆石U-Pb测年、岩石地球化学和Hf同位素约束[J].地质与勘探,2018,54(01):102-111.
[21]郝玉军,肖昱,段建良,等.湘西茶庵铺地区地球化学特征及找矿方向[J].地质与勘探,2017,53(06):1105-1114.
[22]于炳松,乐昌硕.沉积岩物质成分所蕴含的地球深部信息[J].地学前缘,1998(03):105-112.
[23]王兴志,林刚,姚泾利,等.鄂尔多斯盆地盐池地区二叠系山1-盒8段物源分析[J].地质与勘探,2014,50(05):997-1006.
[24]吴赛赛,赵省民,邓坚.漠河盆地中侏罗统漠河组泥岩元素地球化学特征及其地质意义:以MK-3井为例[J].地质科技情报,2016,35(03):17-27.
[2]刘锐娥,卫孝峰,王亚丽,等.泥质岩稀土元素地球化学特征在物源分析中的意义———以鄂尔多斯盆地上古生界为例[J].天然气地球科学,2005,(06):788-791.
[3]高德燚,平文文,胡宝林,等.淮南煤田山西组泥页岩微量元素地球化学特征及其意义[J].煤田地质与勘探,2017,45(02):14-21.
[4]宋党育,李春辉,宋播艺,等.新密煤田裴沟矿二1煤中环境敏感元素地球化学特征[J].煤田地质与勘探,2016,44(5):28-36.
[5]杨磊,刘池洋,李洪英.陈家山矿煤中微量元素和稀土元素地球化学特征[J].煤田地质与勘探,2008,36(02):10-14.
[6]宁夏回族自治区地质矿产局.宁夏回族自治区区域地质志[M].北京:地质出版社,1990,293-295.
[7]宁夏回族自治区地质调查院.中国区域地质志—宁夏志[M].北京:地质出版社,2017,430-433.
[8]张参.鄂尔多斯盆地西缘及邻区侏罗纪延安期原始盆地沉积面貌恢复[D].西安:西北大学,2010.
[9]Taylor S R,Mclennan S M. The continental crust:Its composition and evolution[M]. Oxford:Blackwell Scientific Publications,1985.
[10]WALKERCT. Evaluation of boron as a paleosalinity indicator and its application to offshore prospects. AAPG Bull,1968,52:751-766.
[11]王水利,葛岭梅.大青山煤田煤系高岭岩稀土元素地球化学特征[J].煤田地质与勘探,2007,35(05):1-5.
[12]彭立才,韩德馨,周家驹.柴达木冷科1井不同沉积环境元素地球化学特征[J].煤田地质与勘探,2001,29(06):1-3.
[13]Boynton W V. Cosmochemistry of the rare earth elements:Meteoric studies[C]//Henderson P. Rare earth elements geochemistry:Developments in geochemistry. Amesterdam:Elsevier,1984:63-114.
[14]陶晓风,吴德超.普通地质学[M].北京:科学出版社,2007:185-210.
[15]许中杰,程日辉,王嘹亮,等.广东东莞地区中侏罗统塘厦组凝灰质沉积物的元素地球化学特征及构造背景[J].岩石学报,2010,26(1):352-360.
[16]李智超,李永项,李文厚,等.甘肃兰州盆地古近系泥岩的古盐度分析[J].地质科学,2016,(4):1344-1356.
[17]张天福,孙立新,张云,等.鄂尔多斯盆地北缘侏罗纪延安组、直罗组泥岩微量、稀土元素地球化学特征及其古沉积环境意义[J].地质学报,2016,90(12):3454-3472.
[18]Tribovillard N,Algeo T J,Lyons T,et al. Trace metals as paleoredonx and paleoproductivity proxies:An update[J]. Chemical Geology,2006,232(1/2):12-32.
[19]吴灿灿,陈松,李俊,郭锤.皖北宿州地区寒武系豹皮灰岩地球化学特征及其地质意义[J].地质与勘探,2018,54(01):90-101.
[20]张鲲,徐德明,胡俊良,等.广西梧州思委银矿区花岗岩的岩石成因:锆石U-Pb测年、岩石地球化学和Hf同位素约束[J].地质与勘探,2018,54(01):102-111.
[21]郝玉军,肖昱,段建良,等.湘西茶庵铺地区地球化学特征及找矿方向[J].地质与勘探,2017,53(06):1105-1114.
[22]于炳松,乐昌硕.沉积岩物质成分所蕴含的地球深部信息[J].地学前缘,1998(03):105-112.
[23]王兴志,林刚,姚泾利,等.鄂尔多斯盆地盐池地区二叠系山1-盒8段物源分析[J].地质与勘探,2014,50(05):997-1006.
[24]吴赛赛,赵省民,邓坚.漠河盆地中侏罗统漠河组泥岩元素地球化学特征及其地质意义:以MK-3井为例[J].地质科技情报,2016,35(03):17-27.