CAJ | 학술논문

为研究鄂尔多斯盆地南缘铜川地区三叠系延长组油页岩形成时的古湖泊水体环境，对采自研究区内3条剖面上的样品进行了主量及微量元素分析。结果表明，该区油页岩含磷、铁较高，可能是湖盆周边火山灰喷发带来的营养物质所致。油页岩的 Sr／Ba、V ／（V＋Ni）、Ni ／Co、U ／Th、Sr／Cu、MnO、FeO ／Fe 2 O3均值分别为0．32、0．91、3．11、3．83、2．6、0．027、0．55，指示研究区油页岩发育于温暖湿润气候下的半深湖-深湖相淡水缺氧陆相湖泊。根据 Mo 明显富集和较高的 Ba ／Al 值，以及根据有机碳和古生产力关系式计算得出的较高的古湖泊生产力值，均表明油页岩沉积时期古湖泊生产力较高。
위연구악이다사분지남연동천지구삼첩계연장조유혈암형성시적고호박수체배경，대채자연구구내3조부면상적양품진행료주량급미량원소분석。결과표명，해구유혈암함린、철교고，가능시호분주변화산회분발대래적영양물질소치。유혈암적 Sr／Ba、V ／（V＋Ni）、Ni ／Co、U ／Th、Sr／Cu、MnO、FeO ／Fe 2 O3균치분별위0．32、0．91、3．11、3．83、2．6、0．027、0．55，지시연구구유혈암발육우온난습윤기후하적반심호-심호상담수결양륙상호박。근거 Mo 명현부집화교고적 Ba ／Al 치，이급근거유궤탄화고생산력관계식계산득출적교고적고호박생산력치，균표명유혈암침적시기고호박생산력교고。
This study studied the characteristics of major and trace elements of the Tongchuan oil shale of the Yanchang Formation in the southern Ordos Basin and discussed the paleo-lake environment of this area.The high contents of phos-phate and iron may be due to nutritions from volcanic ash after volcanic eruption around the lake.The average values of Sr /Ba,V /(V+Ni),Ni /Co,U /Th,Sr /Cu,MnO and FeO /Fe 2 O 3 are 0.32,0.91,3.1 1,3.83,2.6,0.027 and 0.55 respectively,showing organic matter is accumulated in a half deep-deep freshwater lake with an anoxic environment.The obvious positive anomaly of Mo content,the high Ba /Al ratio,and the high paleo-productivity calculated according to TOC showed that the paleo-productivity of the Tongchuan oil shale deposited is high.