Discovery and significance of gravity flow deposits of the late Maokouan in Shaoyang area of Hunan Province
Shao Longyi1, Liu Bingqiang1, Ji Congwei1, Wu Yide2, Li Zhineng2, Peng Zhengqi2, Zhang Chao1, Li Guangming2
1 College of Geoscience and Surveying Engineering,China University of Mining and Technology(Beijing),Beijing 100083; 2 Hunan Bureau of Coal Geology,Changsha 410014, Hunan;
Abstract The gravity flow deposits with typical geological characteristics and depositional sequence are developed in the Lower Longtan Formation(late Maokouan in Middle Permian),which are well exposed in a road cut cliff along the Shaoyang aveneue in the suburb of Shaoyang City,central Hunan Province. The gravity flow deposits are mainly composed of massive sandstones, interbedded siltstones and mudstones. Sedimentary structures including load cast,flute cast,tool mark and scouring-filling structures are developed at the bottom of the sandstones,whereas massive bedding,parallel bedding,convolute bedding and graded bedding are developed in the internal part of sandstones. Trace fossils similar to Paleodictyon are found in interbedded mudstones. The deposits of sandy debris flow and turbidity current,and slumps are recognized based on the sedimentary structures seen in the outcrops. The lower part of the section is developed with muddy-gravel-bearing massive sandstone and the upper part was dominated by interbedded sandstones with thin to middle-thick beds,slitstones and mudstones. The gravity flow sedimentary model is established based on the characteristics of gravity flow deposits and their vertical sequences,and the inner fan,middle fan and outer fan facies belts are subdivided. Based on the comparison with sedimentary characteristics of the lower part of the Longtan Formation in the adjacent Duanpiqiao exploration area,and referred to the overall Middle Permian palaeogeography of southern China,we believe that the gravity flow deposits developed in the Late Middle Permian(lower Longtan Formation)in the Shaoyang area imply the deep fault between the Cathaysia landmass and the Yangtze landmass had stretched and formed a extensional trough basin during the late Maokouan.
Fund:Co-funded by National Natural Science Foundation of China(No.41572090)and National Science and Technology Major Project(No.2016ZX05041004-003)
About author: Shao Longyi,born in 1964,doctoral supervisor,graduated and obtained his Ph.D. degree from China University of Mining and Technology(Beijing)in 1989. Now he is a professor at the College of Geoscience and Surveying Engineering of China University of Mining and Technology(Beijing),with main research interests in sedimentology and coal geology. E-mail: shaol@cumtb.edu.cn.
Cite this article:
Shao Longyi,Liu Bingqiang,Ji Congwei et al. Discovery and significance of gravity flow deposits of the late Maokouan in Shaoyang area of Hunan Province[J]. JOPC, 2017, 19(4): 583-594.
Shao Longyi,Liu Bingqiang,Ji Congwei et al. Discovery and significance of gravity flow deposits of the late Maokouan in Shaoyang area of Hunan Province[J]. JOPC, 2017, 19(4): 583-594.
1 柏道远,黄建中,刘耀荣,伍光英,马铁球,王先辉. 2005. 湘东南及湘粤赣边区中生代地质构造发展框架的厘定. 中国地质,32(4): 557-569. [Bo D Y,Huang J Z,Liu Y R,Wu G Y,Ma T Q,Wang X H. 2005. Framework of Mesozoic tectonic evolution in southeastern Hunan and the Hunan-Guangdong-Jiangxi border area. Geology in China,32(4): 557-569] 2 陈洪德,侯明才,许效松,田景春. 2006. 加里东期华南的盆地演化与层序格架. 成都理工大学学报(自然科学版),33(1): 1-8. [Chen H D,Hou C M,Xu X S,Tian J C. 2006. Tectonic evolution and sequence stratigraphic framework in South China during Caledonian. Journal of Chengdu University of Technology(Science & Technology Edition),33(1): 1-8] 3 陈志明. 1991. 扬子地台早古生代碳酸盐重力流沉积的地质背景探讨. 地质科学,4: 337-345. [Chen Z M. 1991. A Discussion on geologic background for carbonate gravity flows in early Paleozoic carbonate rocks on Yangtze Platform. Scientia. Chinese Journal of Geology,4: 337-345] 4 崔周旗,李文厚,吴健平,李莉,侯凤梅,王海潮. 2005. 乌里雅斯太凹陷斜坡带湖底扇相砾岩体沉积特征与隐蔽油藏勘探. 沉积学报,23(1): 21-28. [Cui Z Q,Li W H,Wu J P,Li L,Hou F M,Wang H C. 2005. The depositional characteristics of conglomerate bodies and exploration in subtle oil pools of sublacustrine fan facies in slope zone,Wuliyasitai Sag. Acta Sedimentologica Sinica,23(1): 21-28] 5 方爱民,李继亮,侯泉林. 1998. 浊流及相关重力流沉积研究综述. 地质论评,44(3): 270-280. [Fang A M,Li J L,Hou Q L. 1998. Sedimentation of turbidity currents and relative gravity flows: A review. Geological Review,44(3): 270-280] 6 高振中,段太忠. 1985. 湘西黔东寒武纪深水碳酸盐重力沉积. 沉积学报,3(3): 7-19. [Gao Z Z,Duan T Z. 1985. Gravity-displaced deoposits of Cambrian deep-water carbonates in west Hunan and east Guizhou. Acta Sedimentologica Sinica,3(3): 7-19] 7 黄汲清,任纪舜,姜春发,张之孟,许志琴. 1977. 中国大地构造基本轮廓. 地质学报,51(2): 117-135. [Huang J Q,Ren J S,Jiang C F,Zhang Z M,Xu Z Q. 1977. An outline of the tectonic characteristics of China. Acta Geologica Sinica,51(2): 117-135] 8 李谋,宋暖和. 2007. 湖南邵阳短陂桥矿区龙潭组沉积环境及聚煤特征. 中国煤田地质,19(4): 10-14. [Li M,Song N H. 2007. Duanpiqiao mining area Longtan Formation depositional environment and coal accumulation characteristics,Shaoyang,Hunan. Coal Geology of China,19(4): 10-14] 9 廖宗廷. 1993. 中国东南地区沉积盆地的构造演化. 上海地质,(3): 11-15. [Liao Z T. 1993. On the tectonic evolution of sedimentary basins in southeastern China. Shanghai Geology,(3): 11-15] 10 刘文均. 1998. 海西—印支期华南板块的沉积特点. 成都理工学院学报,25(2): 328-336. [Liu W J. 1998. Evolution of sedimentation of South China plate in the Hercynian-Indosinian stage. Journal of Chengdu University of Technology,25(2): 328-336] 11 马永生,陈洪德,王国立. 2009. 中国南方层序地层与古地理. 科学出版社,305-308. [Ma Y S,Chen H D,Wang G L. 2009. Sequence Stratigraphy and Palaeogeography of Southern China. Science Press,305-308] 12 彭正奇. 2002. 湖南龙潭煤系形成时的大地构造环境. 煤田地质与勘探,24(4): 5-8. [Peng Z Q. 2002. The geotectonic environment of Longtan coal-forming period in Hunan Province. Coal Geology and Exploration,24(4): 5-8] 13 彭正奇,汪涛,龚玉红. 1997. 湖南二叠纪含煤地层研究新进展. 湖南地质,16(1): 20-23. [Peng Z Q,Wang T,Gong Y H. 1997. New ideas on the study of Permian Period coal-bearing strata in Hunan. Hunan Geology,16(1): 20-23] 14 彭正奇,左文贵. 2004. 邵阳短陂桥矿区煤系沉积环境及聚煤规律研究. 采矿技术,4(2): 68-70. [Peng Z Q,Zuo W G. 2004. The research of coal sedimentary environment and coal-accumulating pattern in Duanpiqiao exploration area,Shaoyang. Mining Technology,4(2): 68-70] 15 覃建雄,曾允孚,陈洪德,田景春. 1999. 碳酸盐斜坡沉积层序地层研究. 石油实验地质,21(2): 110-118. [Qin J X,Zeng Y F,Chen H D,Tian J C. 1999. Sequence stratigraphy study of carbonate slope deposit. Experimental Petroleum Geology,21(2): 110-118] 16 覃明,赵征. 1993. 三(都)-丹(寨)地区中寒武世至早奥陶世碳酸盐重力流沉积. 贵州地质,10(2): 131-137. [Qin M,Zhao Z. 1993. Carobnate gravity-flow sedimentation from middle Cambrian period to lower Ordovician period in Sandu-Danzhai region. Geology of Guizhou,10(2): 131-137] 17 任纪舜. 1990. 论中国南部的大地构造. 地质学报,(4): 275-288. [Ren J S. 1990. On the geotectonics of southern China. Acta Geologica Sinica,(4): 275-288] 18 邵龙义,张鹏飞. 1999. 广西来宾—合山一带晚二叠世海底扇浊积岩相. 古地理学报,1(1): 20-30. [Shao L Y,Zhang P F. 1999. Late Permian submarine fan turbidite facies in the Laibin-Heshan area of Guangxi. Journal of Palaeogeography(Chinese Edition),1(1): 20-30] 19 石文斌,李启桂,李健. 2006. 湘东南坳陷构造演化及油气成藏研究. 国土资源导刊,增刊一: 15-21. [Shi W B,Li Q G,Li J. 2006. The research of depression tectonic evolution and petroleum entrapment in southeast Hunan. Land & Resources Herald,supplement 1: 15-21] 20 水涛. 1975. 郴怀断褶带的地质发展史兼论华夏系方向构造问题. 地质科学,(4): 327-342. [Shui T. 1975. Geological development of the Chenxian-Huaiji structural belt with special reference to the trending of the Cathaysian system. Scientia Geologica Sinica,(4): 327-342] 21 许靖华,孙枢,李继亮. 1987. 是华南造山带而不是华南地台. 中国科学B辑,(10): 1107-1115. [Xu J H,Sun S,Li J L. 1987. Is the Southern China orogenic belt instead of Southern China platform. Science China(Series B),(10): 1107-1115] 22 杨仁超,何治亮,邱桂强,金之钧,孙冬胜,金晓辉. 2014. 鄂尔多斯盆地南部晚三叠世重力流沉积体系. 石油勘探与开发,41(6): 661-670. [Yang R C,He Z L,Qiu G Q,Jin Z J,Sun D S,Jin X H. 2014. Late Triassic gravity flow depositional systems in the southern Ordos Basin. Petroleum Exploration and Development,41(6): 661-670] 23 殷鸿福,吴顺宝,杜远生,彭元桥. 1999. 华南是特提斯多岛洋体系的一部分. 地球科学(中国地质大学学报),24(1): 1-12. [Yin H F,Wu S B,Du Y S,Peng Y Q. 1999. South China defined as part of Tethyan archipelagic ocean system. Earth Science(Journal of China University of Geosciences),24(1): 1-12] 24 曾允孚,郑荣才. 1984. 湘西凤凰长坪清虚洞期碳酸盐重力流沉积及深水蒸发岩. 成都地质学院学报,4: 13-21. [Zeng Y F,Zheng R C. 1984. The carbonate gravity flow sediments and deep-water evaporites in the Qingxudong Formation(Lower Cambrian)from Changping Town,Fenghuang County,western Hunan. Journal of Chengdu University of Technology(Science & Technology Edition),4: 13-21] 25 邹才能,赵政璋,杨华,付金华,朱如凯,袁选俊,王岚. 2009. 陆相湖盆深水砂质碎屑流成因机制与分布特征: 以鄂尔多斯盆地为例. 沉积学报,27(6): 1065-1075. [Zou C N,Zhao Z Z,Yang H,Fu J H,Zhu R K,Yuan X J,Wang L. 2009. Genetic mechanism and distribution of sandy debris flows in terrestrial lacustrine basin. Acta Sedimentologica Sinica,27(6): 1065-1075] 26 Bouma A H. 1962. Sedimentology of Some Flysch Deposits: A Graphic Approach to Facies Interpretation. Amsterdam: Elsevier,1-168. 27 Ercilla G,Alonso B,Wynn R B,Baraza J. 2002. Turbidity current sediment waves on irregular slopes: Observations from the Orinoco sediment-wave field. Marine Geology,192: 171-187. 28 Kuenen Ph H,Migliorini C I. 1950. Turbidity currents as a cause of graded bedding. The Journal of Geology,58(2): 41-127. 29 Marr J,Harff P,Shanmugam G,Parker G. 1997. Experiments on subaqueous sandy deris flows. Supplement to EOS Transcations. AUG Fall Meetings,San Francisco. 30 Middleton G,Hampton M A. 1976. Subaqueous sediment transport and deposition by sediment gravity flows. Stanley D J(ed). Marine Sediment Transport and Environmental Management. NewYork: Wiley,197-218. 31 Pirmeza C,Imranb J. 2003. Reconstruction of turbidity currents in Amazon Channel. Marine and Petroleum Geology,20: 823-849. 32 Seilacher,A. 1967. Bathym etry of trace fossils. Marine Geology,5(5-6): 413-428. 33 Shanmugam G,Lehtonen L R,Straume T,Syvertsen S E,Hodgkinson R J,Skibeli M. 1994. Slumps and debris-flow dominated upper slope facies in the Cretaceous of the Norwegian and northern North Seas(61-67°N): Implications for sand distribution. AAPG Bulletin,78(6): 910-937. 34 Shanmugam G. 1997. The Bouma sequence and the turbidite mind set. Earth Science Reviews,42(4): 201-229. 35 Shanmugam G. 2000.50 years of the turbidite paradigm(1950s-1990s): Deep-water processes and facies model: A critical perspective. Marine and Petroleum Geology,17(2): 285-342. 36 Shiki T,Kumon F,Inouchi Y,Kontanid Y,Sakamotoe T,Tateishif M,Matsubarag H,Fukuyamah K. 2000. Sedimentary features of the seisimo-turbidites. Sedimentary Geology,135(1-4): 37-50. 37 Walker R G, Phli D. 1965. The origin and significance of the internal sedimentary structure of turbidites. Yorkshire Geological Society Proceedings,35: 1-32.
