牛东地区卡拉岗组火山旋回和期次的划分与对比
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摘要
以系统取心资料及其分析化验资料为基础,结合测井和地震资料,根据火山岩的岩性、电性、岩石化学等特征,以及不同岩性岩相的地震反射特征,将三塘湖盆地马朗凹陷牛东地区卡拉岗组火山岩地层划分为层、韵律、期次、亚旋回等不同单元。以期次(层组)作为该区火山岩地层划分对比的基本单元,对该区火山岩地层进行了划分与对比。研究表明:该区卡拉岗组火山活动以裂隙式喷发为主,分布规律表现为:层组的厚度,数目由西南向东北呈明显地减薄(少)趋势。
Based on the systemic coring data and their analysis test data,combined well logging and seismic data,and according to the characteristics of lava lithology,electrical property,petrochemistry and so on,and along with the seismic reverberation of different lithology and lithofacies,volcanic stratum of Kalagang formation in Niudong area in Malang sag of Sangtanghu basin can be divided into different units,such as layer,cyclothem,period,and sub-gyration.Regarding volcanic eruptible period as the basal unit of lava stratigraphic division and correlation,the lava stratigraphic division and correlation in this area has been done.The study indicates that fracture eruption is the main eruptible mode in Kalagang formation.Volcanic distribution reveals that the thickness and amount of the volcanic layer decrease distinctly from southwest to northeast.
Based on the systemic coring data and their analysis test data,combined well logging and seismic data,and according to the characteristics of lava lithology,electrical property,petrochemistry and so on,and along with the seismic reverberation of different lithology and lithofacies,volcanic stratum of Kalagang formation in Niudong area in Malang sag of Sangtanghu basin can be divided into different units,such as layer,cyclothem,period,and sub-gyration.Regarding volcanic eruptible period as the basal unit of lava stratigraphic division and correlation,the lava stratigraphic division and correlation in this area has been done.The study indicates that fracture eruption is the main eruptible mode in Kalagang formation.Volcanic distribution reveals that the thickness and amount of the volcanic layer decrease distinctly from southwest to northeast.
引文
[1]李兼海，邓文祥．火山岩的野外工作法[M]．区域地质调查野外工作方法第二分册，地质出版社，1980，133-140．
[2]谢家莹．试论陆相火山岩区火山地层单位与划分[J]．火山地质与矿产，1996，17(3-4)：85-93．
[3]冀国盛，戴俊生，马欣本，等．金湖凹陷闵北地区阜一、二段火山岩地层划分与对比[J]．石油大学学报(自然科学版)，2002，26(4)：5-8．
[4]丁林，张进江，邓万明．藏北鱼鳞山新生代火山岩及风化壳复合堆积物的组成和时代[J]．科学通报，2000，45 (14)：1476-1477．
[5]陈业全，李宝刚．塔里木盆地中部二叠系火山岩地层的划分与对比[J]．石油大学学报(自然科学版)，2004，28(6)：6-10．
[6]郭振华，王璞，印长海．松辽盆地北部火山岩岩相与测井相关系研究[J]．吉林大学学报(地球科学版)，2006，36(2)：208-211．
[2]谢家莹．试论陆相火山岩区火山地层单位与划分[J]．火山地质与矿产，1996，17(3-4)：85-93．
[3]冀国盛，戴俊生，马欣本，等．金湖凹陷闵北地区阜一、二段火山岩地层划分与对比[J]．石油大学学报(自然科学版)，2002，26(4)：5-8．
[4]丁林，张进江，邓万明．藏北鱼鳞山新生代火山岩及风化壳复合堆积物的组成和时代[J]．科学通报，2000，45 (14)：1476-1477．
[5]陈业全，李宝刚．塔里木盆地中部二叠系火山岩地层的划分与对比[J]．石油大学学报(自然科学版)，2004，28(6)：6-10．
[6]郭振华，王璞，印长海．松辽盆地北部火山岩岩相与测井相关系研究[J]．吉林大学学报(地球科学版)，2006，36(2)：208-211．
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