Characteristics of contourites in the Lower Silurian in southeastern Sichuan Basin,China
QIAO Dan1,2, SHI Zhiqiang1,2, ZHANG Xiang1,2, LI Changhao1,2
1 State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu 610059,China; 2 Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu 610059,China
Abstract：Modern marine geological surveys show that there are contourites along the slopes of carbonate platforms. However,it is difficult to identify contourite drifts preserved in the strata. In this study,we document contourites from the Lower Silurian Xiaoheba and Shiniulan Formations in the southeastern Sichuan Basin based on the field investigation and microscopic observation. Symmetrical graded beddings and banded structures with periodic variations are found from the Xiaoheba Formation at such sections as Sanquan in Nanchuan County,Jinzhu in Shizhu County,Huangcaochang in Wulong County. Nodular limestones and argillaceous strip-banded limestones are developed in the lower Shiniulan Formation,while thin-bedded sandstones are found in the upper Shiniulan Formation at Baiyangshu and Podu sections in Tongzi County. Compared with modern carbonate platforms at Bahama and Maldivian,and with consider of the typical deep-water isobathic sedimentary features,it is suggested that contourites predominate the sandstones of Xiaoheba Formation. Likewise,the thin-bedded sandstones yielding from the upper Shiniulan Formation might be the contourites controlled by periodic changes of sea level. Meanwhile,the striped limestones in the lower Shiniulan Formation are recognized as the deposits controlled by tractive current(i.e.,contour current). This study provides an actualistic example for ancient contourites which might enhance our understanding of the Lower Silurian palaeogeographic evolution and of oil/gas reservoirs in the southeastern Sichuan Basin.
QIAO Dan,SHI Zhiqiang,ZHANG Xiang et al. Characteristics of contourites in the Lower Silurian in southeastern Sichuan Basin,China[J]. JOPC, 2023, 25(4): 856-871.
[1] 高振中,罗顺社,何幼斌,张吉森,唐子军. 1995. 鄂尔多斯地区西缘中奥陶世等深流沉积. 沉积学报, 13(4): 16-26. [Gao Z Z,Luo S S,He Y B,Zhang J S,Tang Z J.1995. The middle ordovician contourite on the west margin of ordos. Acta Sedimentologica Sinica, 13(4): 16-26] [2] 郭建华,梁卫. 1994. 大西洋洋底现代等深流及其沉积特征综述. 地质地球化学, 22(6): 22-26. [Guo J H,Liang W.1994. A review of modern contourites and sedimentary characteristics in the Atlantic Ocean. Earth and Environment, 22(6): 22-24] [3] 郭英海,李壮福,李大华,张天模,汪泽成,余继峰,奚砚涛. 2004. 四川地区早志留世岩相古地理. 古地理学报, 6(1): 20-29. [Guo Y H,Li Z F,Li D H,Zhang T M,Wang Z C,Yu J F,Xi J T.2004. Lithofacies palaeogeography of the Early Silurian in Sichuan area. Journal of Palaeogeography(Chinese Edition), 6(1): 20-29] [4] 何利,谭钦银,王瑞华,王正和,程锦翔,宋春彦. 2013. 川东南早志留世石牛栏期沉积相、沉积模式及其演化. 矿物岩石, 33(4): 96-106. [He L,Tan Q Y,Wang R H,Wang Z H,Cheng J X,Song C Y.2013. Sedimentary facies,sedimentary model and evolution of the shiniulan formation of early silurian in the southeast sichuan. Mineralogy and Petrology, 33(4): 96-106] [5] 何幼斌,罗顺社,高振中. 1995. 深水牵引流沉积研究新进展. 天然气地球科学, 32(6): 13-17. [He Y B. Luo S S,Gao Z Z.1995. New progress in the study of traction current deposition in deep water. Natural Gas Geoscience, 32(6): 13-17] [6] 何幼斌,高振中,罗顺社,李建明. 1998. 等深流沉积的特征及其鉴别标志. 江汉石油学院学报, 20(4): 1-6. [He Y B,Gao Z Z,Luo S S,Li J M.1998. Features of contourites and their discrimination. Journal of Jianghan Petroleum Institute, 20(4): 1-6] [7] 侯明才,陈洪德,陈安清. 2010. 江南—雪峰隆起对川东南—黔南凹陷石牛栏期沉积古地理的制约. 成都理工大学学报(自然科学版), 37(4): 395-400. [Hou M C,Chen H D,Chen A Q.2010. Constraints of the Jiangnan-Xuefeng upheaval to the depositional system and paleogeography distribution of Southeast SichuanSouth Guizhou depression during Shiniulan Period. Journal of Chengdu University of Technology(Science &Technology Edition), 37(4): 395-400] [8] 李华,何幼斌,黄伟,刘朱睿鸷,张锦. 2016. 鄂尔多斯盆地南缘奥陶系平凉组等深流沉积. 古地理学报, 18(4): 631-642. [Li H,He Y B,Huang W,Liu Z R Z,Zhang J.2016. Contourites of the ordovician pingliang Formation in southern margin of Ordos Basin. Journal of Palaeogeography(Chinese Edition), 18(4): 631-642] [9] 李华,何幼斌. 2017. 等深流沉积研究进展. 沉积学报, 35(2): 228-240. [Li H,He Y B.2017. Research processes on contourites. Acta Sedimentologica Sinica, 35(2): 228-240] [10] 李向东,陈海燕. 2019. 滇中梅树村剖面筇竹寺组等深流沉积的发现及其意义. 高校地质学报, 25(3): 412-422. [Li X D,Chen H Y.2019. Discovery of Contourite and its significance in Qiongzhusi formation of meishucun section,central yunnan province,China. Geological Journal of China Universities, 25(3): 412-422] [11] 刘宝珺,许效松,梁仁枝. 1990. 湘西黔东寒武纪等深流沉积. 矿物岩石, 4(10): 43-47. [Liu B J,Xu X S,Liang R Z.1990. Contouries of camnrian in western Hunan and eastern Guizhou. Mineralogy and Petrology, 4(10): 43-47] [12] 罗宏谓. 2019. 川东南地区志留系小河坝组物源分析. 成都理工大学硕士论文,41-45. [Luo H W.2019. Provenance of xiaoheba formation of silurian in southeast Sichuan. Masteral dissertation of Chengdu University of Technology,41-45] [13] 罗顺社,何幼斌. 2002. 深水等深积岩丘及其含油气潜能. 海相油气地质, 7(4): 8-12. [Luo S S,He Y B.2002. Deep-water contourite drift and their hydrocarbon potential. Marine Petroleum Geology, 7(4): 8-12] [14] 马东洲,陈洪德,朱利东,林良彪. 2006. 川南下志留统石牛栏组沉积体系与岩相古地理. 成都理工大学学报(自然科学版), 33(3): 228-232. [Ma D Z,Chen H D,Zhu L D,Lin L B.2006. Sedimentary system and lithofacies paleogeography of the Silurian Shiniulan Formation in southern Sichuan. Journal of Chengdu University of Technology(Science & Technology Edition), 33(3): 228-232]. [15] 四川地质矿产局.1990. 四川区域地质志. 北京: 地质出版社,114-136. [Sichuan Bureau of Geology and Mineral Resources.1990. Regional Geology of Sichuan. Beijing: Geological Publishing House,114-136] [16] 陶树,汤达祯,周传祎,李凤,李婧婧,陈晓智,孟昌衷. 2009. 川东南—黔中及其周边地区下组合烃源岩元素地球化学特征及沉积环境意义. 中国地质, 36(2): 397-403. [Tao S,Tang D Z,Zhou C W,Li Feng,Li J J,Chen X Z,Meng C Z.2009. Element geochemical characteristics of the lower assemblage hydrocarbon source rocks in southeast Sichuan-central Guizhou(Chuandongnan-Qianzhong)region and its periphery areas and their implications to sedimentary environments. Geology in China, 36(2): 397-403] [17] 王萍,谭先锋,陈浩,王佳,梁迈,罗龙,冉天. 2018. 早志留世埃隆期上扬子海洋生物礁发育过程及制约机制: 以渝南—黔北地区石牛栏组为例. 地球科学进展, 33(6): 621-638. [Wang P,Tan X F,Chen H,Wang J,Liang M,Luo L,Ran T.2018. The development process and restriction mechanism of Reefs(Aeronian,Early Silurian)in the Paleo-Ocean of Upper Yangtze Region: the Shiniulan Formation of Southern Chongqing and Northern Guizhou Province as an example. Advances in Earth Science, 33(6): 621-638] [18] 许效松,汪正江. 2003. 对中国海相盆地油气资源战略选区的思路. 海相油气地质, 8(1): 1-9. [Xu X S,Wang Z J.2003. Thoughts on strategic selection of oil and gas resources in marine basins of China. Marine Origin Petroleum Geology, 8(1): 1-9] [19] 张金川,边瑞康,荆铁亚,唐玄,尹腾宇,张琴,朱华. 2011. 页岩气理论研究的基础意义. 地质通报, 30(2): 318-323. [Zhang J C,Bian R K,Jing T Y,Tang X,Yi T Y,Zhang Q,Zhu H.2011. Fundamental significance of gas shale theoretical research. Geological Bulletin of China, 30(2): 318-323] [20] 周恳恳. 2015. 中上扬子及其东南缘中奥陶世—早志留世沉积特征及岩相古地理演化. 中国地质科学院博士论文,114-125. [Zhou K K.2015. Middle Ordovician-Early Silurian lithofacies palegeography of Middle-Upper Yangze and its southeastern margin. Doctoral dissertation of Chinese Academy of Geological Science,114-125] [21] 朱志军. 2010. 川东南地区志留系小河坝组沉积体系及物质分布规律研究. 成都理工大学博士论文,127-129. [Zhu Z J.2010. The research of the rule of depositional system and distribution of lower Silurian Xiaoheba formation in southeast Sichuan. Doctoral dissertation of Chengdu University of Technology,127-129] [22] 朱志军,陈洪德,林良彪,范昱. 2010a. 川东南—湘西地区志留系小河坝组砂岩微量元素地球化学特征及意义. 地质科技情报, 29(2): 24-43. [Zhu Z J,Chen H D,Lin L B,Fan Y.2010a. Signification and characteristic of the trace element ratios of the sandstone in silurian xiaoheba formation in southeastern sichuan province and western hunan province. Geological Science and Technology Information, 29(2): 24-43] [23] 朱志军,陈洪德,林良彪,侯明才,陈安清,钟怡江. 2010b. 黔北—川东南志留系层序格架下的沉积体系演化特征及有利区带预测. 沉积学报, 28(2): 243-253. [Zhu Z J,Chen H D,Lin L B,Hou M C,Chen A Q,Zhong Y J.2010b. Depositional system evolution characteristics in the framework of sequences of silurianand prediction of favorable zones in the northern Guizhou-Southeastern Sichuan. Acta Sedimentologica Sinica, 28(2): 243-253] [24] 朱志军,陈洪德. 2012a. 川东南地区早志留世晚期沉积特征及沉积模式分析. 中国地质, 39(1): 64-76. [Zhu Z J,Chen H D.2012a. An analysis of sedimentary characteristics and model of Silurian Xiaoheba Formation in southeastern Sichuan Province. Geology in China, 39(1): 64-76] [25] 朱志军,陈洪德. 2012b. 川东南地区志留系小河坝组砂岩特征及物源分析. 吉林大学学报(地球科学版), 42(6): 1590-1600. [Zhu Z J,Chen H D.2012b. Sandstone characteristics and provenance analysis of the sandstone in silurian xiaoheba Formation in southeast Sichuan,China. Journal of Jilin University(Earth Science Edition), 42(6): 1590-1600] [26] 邹才能,董大忠,杨桦,王玉满,黄金亮,王淑芳,付成信. 2011. 中国页岩气形成条件及勘探实践. 天然气工业, 31(12): 26-39. [Zou C N,Dong D Z,Yang Y,Wang Y M, Huang J L, Wang S F, Fu C X.2011. Conditions of shale gas accumulation and exploration practices in China. Natural Gas Industry, 31(12): 26-39] [27] Betzler C,Eberli G P.2019. Miocene start of modern carbonate platforms. Geology, 47(8): 771-775. [28] Eberli G P,Betzler C.2019. Characteristics of modern carbonate contourite drifts. Sedimentology, 66(4): 1163-1191. [29] Faugères J C,Stow D A V.2008. Contourite drifts: nature,evolution and controls. Developments in Sedimentology,60: 257-288. [30] Heezen B C,Hollister C D,Ruddiman W F.1966. Shaping of the continental rise by deep geostrophic contour currents. Science, 152(3721): 502-508. [31] Lüdmann T,Kalvelage C,Betzler C.2013. The Maldives,a giant isolated carbonate platform dominated by bottom currents. Marine and Petroleum Geology, 43: 326-340. [32] Lüdmann T,Betzler,Eberli G P,Reolid J,Reijmer J J,Sloss C R,Young J R.2018. Carbonate delta drift: a new sediment drift type. Marine Geology,401: 98-111. [33] Mulder T,Ducassou E,Hanquiez V,Principaud M,Fauquembergue K,Tournadour E,Chabaud L,Reijmer J,Recouvreue A,Gillte H,Borgomano J,Schmitt A,Moal P.2019. Contour current imprints and contourite drifts in the Bahamian archipelago. Sedimentology, 66(4): 1192-1221. [34] Murray S P.1970. Bottom currentsnear the coast during hurricane camille. Journal of Geophysical Research, 75(24): 4579-4582. [35] Pepe F,Di Donato V,Insinga D,Molisso F,Faraci C,Sacchi M,Dera R,Ferranti L,Passaro S.2018. Seismic stratigraphy of upper Quaternary shallow-water contourite drifts in the Gulf of Taranto(Ionian Sea,southern Italy). Marine Geology,397: 79-92. [36] Shanmugam G.2017. Contourites: Physical oceanography,process sedimentology,and petroleum geology. Petroleum Exploration and Development, 44(2): 183-216. [37] Stow D A V, Faugères J C. 2008. Contourite facies and the facies model. In: Rebesco M,Camerlenghi A(eds).
Contourites,Developments in Sedimentology. Elsevier,223-256. [38] Swart P K,Mackenzie G J,Eberli G P,Lüdmann T,Betzler C.2019. Do drifts deposited adjacent to carbonate platforms record the signal of global carbon isotopic values?Sedimentology,66(4): 1410-1426. [39] Thran A C,Dutkiewicz A,Spence P,Müller R D.2018. Controls on the global distribution of contourite drifts: insights from an eddy-resolving ocean model. Earth and Planetary Science Letters, 489: 228-240.
