Abstract Eye-like structure was developed in the cores of the Chang 8-6 intervals of Triassic Yanchang Formation in Fuxian area. The eye-like structure consists of external layers and sandy core. According to the geometry and kinematics,the eye-like structures in the research area can be classified as three kinds: lateral compression,the cross section of sheath fold and vertical liquidation. Combined with palaeotectonics and palaeogeography,earthquake was prone to happen because of the basin transition from expansion to contraction and the impaction of the Indosinian Movement in Qinling orogeny. So it suggests that earthquake or earthquake/seismic surge wave was the most possible trigger for the eye-like structure and associated structures. The eye-like soft sediment deformation is associated with massive sandstone,which has been explained as the product of sandy debris flow. Thus further research about the relationship between the two phenomena will be helpful for the oil exploration of lithologic oil-gas reservoir of the research area.
Corresponding Authors:
Zhong Jianhua,born in 1957,is a doctor and professor. Now he is engaged in sedimentary geology. E-mail:957576033@qq.com
About author: Ge Yuzhu,born in 1989,is a master degree candidate in China University of Petroleum(East China). Now he is engaged in sedimentary geology and reservoir geology. E-mail: xiannizhike@163.com
Cite this article:
Ge Yuzhu,Zhong Jianhua,Li Yong et al. Genetic discussion about eye-like structure of the Chang 8-6intervals of Triassic Yanchang Formation in Fuxian area, Ordos Basin[J]. JOPC, 2015, 17(6): 797-804.
Ge Yuzhu,Zhong Jianhua,Li Yong et al. Genetic discussion about eye-like structure of the Chang 8-6intervals of Triassic Yanchang Formation in Fuxian area, Ordos Basin[J]. JOPC, 2015, 17(6): 797-804.
陈飞,胡光义,孙立春,等. 2012. 鄂尔多斯盆地富县地区上三叠统延长组砂质碎屑流沉积特征及其油气勘探意义[J]. 沉积学报,30(6):1043-1052. 黄龙,田景春,肖玲,等. 2008. 鄂尔多斯盆地富县地区长6砂岩储集层特征及评价[J]. 岩性油气藏,20(1):83-88. 姜在兴. 2003. 沉积学[M]. 北京:石油工业出版社,222-224. 李相博,付金华,陈启林,等. 2011. 砂质碎屑流概念及其在鄂尔多斯盆地延长组深水沉积研究中的应用[J]. 地球科学进展,26(3):287-294. 刘春燕,王毅,胡宗全,等. 2010. 鄂尔多斯盆地富县地区上三叠统长8砂岩储集层物性的主要控制因素[J]. 地质科学,45(2):500-508. 罗建强,何忠明. 2008. 鄂尔多斯盆地中生代构造演化特征及油气分布[J]. 地质与资源,17(2):136-138. 马醒华,邢历生,杨振宇,等. 1993. 鄂尔多斯盆地晚古生代以来古地磁研究[J]. 地球物理学报,36(1):68-78. 田媛,钟建华,王书宝,等. 2015. 鄂尔多斯盆地富县探区三叠系延长组震积岩及其地质意义[J]. 古地理学报,17(4):541-552. 杨华,陈洪德,付金华,著. 2012. 鄂尔多斯盆地晚三叠世沉积地质与油藏分布规律[M]. 北京:科学出版社,167-173. 杨友运. 2004. 印支期秦岭造山活动对鄂尔多斯盆地延长组沉积特征的影响[J]. 煤田地质与勘探,32(5):7-9. 袁静,陈鑫,田洪水. 2006. 济阳坳陷古近纪软沉积变形层中的环状层理及成因[J]. 沉积学报,24(5):666-671. 邹才能,赵政璋,杨华,等. 2009. 陆相湖盆深水砂质碎屑流成因机制及分布特征[J]. 沉积学报,27(6):1066-1075. Alsop G L, Marco S. 2013. Seismogenic slump folds formed by gravity-driven tectonics down a negligible subaqueous slope [J]. Tectonophysics, 605:48-69. Berra F,Felletti F. 2011. Syndepositional tectonics recorded by soft-sediment deformation and liquefaction structures(continental Lower Permian sediments,Southern Alps,Northern Italy):Stratigraphic significance[J]. Sedimentary Geology,235:249-263. Jose P C, Miguel R P, Silvia M V, et al. 1998. Microdeformation of lacustrine laminite sequence from Late Miocene formations of SE Spain: An interpretation of loop bedding [J]. Sedimentology, 45:279-292. Marques F O. 2012. Commenton “Eye and sheath folds in turbidite convolute lamination:Aberystwyth Grits Group,Wales”,by McClelland H L O,Woodcock N H,Gladstone C. Journal of Structural Geology,33(2011)1140-1147[J]. Journal of Structural Geology,37:248-250. McClelland H L O,Woodcock N H,Gladstone C. 2011. Eye and sheath folds in turbidite convolute lamination:Aberystwyth Grits Group,Wales[J]. Journal of Structural Geology, 33:1140-1147. McClelland H L O,Woodcock N H,Gladstone C. 2012.“Eye and sheath folds in turbidite convolute lamination:Aberystwyth Grits Group,Wales”,Reply to comment by Marques F O[J]. Journal of Structural Geology,37:251-252. Octavian C,William E G,Christopher G St C, et al. 2011. Sequence Stratigraphy:Methodology and Nomenclature[J]. Newsletters on Stratigraphy,44(3):173-245. Owen G,Moretti M,Alfaro P. 2011. Recognising triggers for soft-sediment deformation:Current understanding and future directions[J]. Sedimentary Geology,235:133-140. Rodr′guez-Pascuaa M A,Calvob J P,DeVicentea G, et al. 2000. Soft-sediment deformation structures interpreted as seismites in lacustrine sediments of the Prebetic Zone,SE Spain,and their potential use as indicators of earthquake magnitudes during the Late Miocene[J]. Sedimentary Geology,135:117-135. Shanmugam G. 2013. New perspectives on deep-water sandstones:Implications[J]. Petroleum Explorer and Development,40(3):316-324. Shanmugam G,Bloch R B,Mitchell S M, et al. 1975. Basin floor fans in the North Sea:Sequence stratigraphic models vs sedimentary[J]. AAPG Bulletin,79(5):477-512.郑秀娟