Mineral and rare earth elements characteristics of tight dolomite surrounding rock in the Member 1 of Sanya Formation in Well Xike 1,Xisha Islands,China
MA Yazeng1,2, CHEN Shu1,2, LIU Zhen1, WANG Yaru1, WEI Haotian3, WEI Zhihao1, ZHANG Zijin4, XU Hong2,5, LUO Jinxiong1
1 School of Geosciences,Yangtze University,Wuhan 430100,China; 2 The First Institute of Oceanography,MNR,Shandong Qingdao, 266061,China; 3 College of Marine Geosciences,Ocean University of China,Shandong Qingdao 266100,China; 4 Engineering Technology Research Institute,CNPC, Bohai Drilling Engineering Company Limited,Tianjin 300457,China; 5 Qingdao Institute of Marine Geology,China Geological Survey,Shandong Qingdao 266071,China
Abstract Tight dolomite in Well Xike 1,Xisha Islands,which featured with low porosity and permeability,which is proven to be composed of two mutually-independent rock mineralogical end-members,interstitial material and surrounding rock according to previous studies. Moreover,since the Xisha Islands are far away from the continental shelf,the geochemical indexes of carbonate rocks on the islands,especially the rare earth elements,are great indicators for the paleo-ocean and sedimentary environment. Hence,the surrounding rock of tight dolomite was studied over its minerals and rare earth elements by means of microscopic observation,SEM-EDS(Scanning Electron Microscope-Energy Dispersive Spectrometer)and laser in-situ denudation technology. The findings show that the surrounding rock is dominated by fine-grained dolomite in automorphic,hypautomorphic and xenomorphic properties with small pores,where developed typical structure with fogged center and clear margin. Further,typical rare earth elements of marine carbonate rocks such as LREE depletion,La positive anomaly,Ce negative anomaly,and high Y/Ho value are represented in the rare earth element distribution is characterized by. In addition,Eu with positive anomaly is thought to be associated with the seabed hydrothermal activity.
Fund:Co-funded by the National Natural Science Foundation of China(No.41872114),National Science and Technology Fundamental Resources Survey Project(No.2017FY201407)and Major Scientific and Technological Projects for Large Oil and Gas Fields and Coalbed Methane(No.2011ZX05025-002-04)
Corresponding Authors:
LUO Jinxiong,born in 1980,associate professor,mainly engaged in sedimentology. E-mail: 6071637@qq.com. XU Hong,born in 1957,professor and researcher,mainly engaged in oil and gas geological survey and resource exploration and evaluation,and research on the genesis of marine reefs. E-mail: xuhong8320@163.com.
About author: MA Yazeng,born in 1994,postgraduate students,mainly engaged in sedimentology research. E-mail: 3495983189@qq.com.
Cite this article:
MA Yazeng,CHEN Shu,LIU Zhen et al. Mineral and rare earth elements characteristics of tight dolomite surrounding rock in the Member 1 of Sanya Formation in Well Xike 1,Xisha Islands,China[J]. JOPC, 2023, 25(1): 149-162.
MA Yazeng,CHEN Shu,LIU Zhen et al. Mineral and rare earth elements characteristics of tight dolomite surrounding rock in the Member 1 of Sanya Formation in Well Xike 1,Xisha Islands,China[J]. JOPC, 2023, 25(1): 149-162.
[1] 陈万利,吴时国,黄晓霞,刘刚,韩孝辉. 2020. 西沙群岛晚第四纪碳酸盐岩淡水成岩作用: 来自永兴岛SSZK1钻孔的地球化学响应证据. 沉积学报, 38(6): 1296-1312. [Chen W L,Wu S G,Huang X X,Liu G,Han X H. 2020. Geochemical Signatures in the Late Quaternary Meteoric Diagenetic Carbonate Succession, Xisha Islands, South China Sea. Acta Sedimentica Sinica, 38(6): 1296-1312] [2] 董刚,刘新宇,李绪深,张道军,闫桂京,苏大鹏,许红. 2021. 南海西科1井致密白云岩特征及成岩环境. 海洋地质前沿, 37(6): 49-54. [Dong G,Liu X Y,Li X S,Zhang D J,Yan G J,Su D P,Xu H. 2021. Characteristics and diagenetic environment of tight dolostone in well xike 1, south china sea. Marine Geological Frontier, 37(6): 49-54] [3] 付和平,沈江远,马骁,许红,张道军,苏大鹏,董刚,闫桂京,刘新宇,闫琢玉. 2021. 西沙群岛梅山组一段白云岩矿物特征. 海洋地质前沿, 37(6): 31-38. [Fu H P,Shen J Y,Ma X,Xu H,Zhang D J,Su D P,Dong G,Yan G J,Liu X Y,Yan Z Y. 2021. Mineralogical characteristics of dolomite in the 1st member of meishan formation of the Xisha Islands. Marine Geology Frontier, 37(6): 31-38] [4] 冯英辞,詹文欢,姚衍桃,孙杰,刘守金,李健. 2015. 西沙群岛礁区的地质构造及其活动性分析. 热带海洋学报, 34(3): 48-53. [Feng Y C,Zan W H,Yao Y T,Sun J,Liu S J,Li J. 2015. Analysis of tectonic movement and activity in the organic reef region around the Xisha Islands. Journal of Tropical Oceanography, 34(3): 48-53] [5] 何治亮,马永生,张军涛,朱东亚,钱一雄,丁茜,陈代钊. 2020. 中国的白云岩与白云岩储层: 分布、成因与控制因素. 石油与天然气地质, 41(1): 1-14. [He Z L,Ma Y S,Zhang J T,Zhu D Y,Qian Y X,Ding Q,Chen D Z. 2020. Distribution,genetic mechanism and control factors of dolomite and dolomite reservoirs in China. Oil & Gas Geology, 41(1): 1-14] [6] 刘宝珺. 1980. 沉积岩石学. 成都: 成都地质学院出版社,191-201. [Liu B J. 1980. Sedimentary petrology. Chengdu: Chengdu Geological Institute Press,191-201] [7] 鲁毅,崔宇驰,刘新宇,邵磊,乔培军. 2020. 中国南海西沙碳酸盐岩台地形成过程及控制因素: 来自西科1井的地球化学证据. 古地理学报, 22(6): 1197-1208. [Lu Y,Cui Y C,Liu X Y,Shao L,Qiao P J. 2020. Formation process and controlling factors of carbonate platform in Xisha area,South China Sea: Based on geochemical evidences from Well Xike-1. Journal of Palaeogeography(Chinese Edition), 22(6): 1197-1208] [8] 沈江远,付和平,马骁,许红,赵强,陈香玉,李绪深,张道军,刘新宇,闫琢玉. 2021. 西沙群岛白云岩—铁白云岩空间变异的特征: 来自地球化学的证据. 海洋地质前沿, 37(6): 18-30. [Shen J Y,Fu H P,Ma X,Xu H,Zhao Q,Chen X Y,Li X S,Zhang D J,Liu X Y,Yan Z Y. 2021. Spatial distribution of ankerite and dolomite in the xisha islands: evidence from geochemistry. Marine Geology Frontier, 37(6): 18-30] [9] 苏大鹏,贺静,闫琢玉,沈江远,马骁,付和平,李绪深,张道军,刘新宇,董刚,闫桂京,许红. 2021. 西沙石岛西科1井深层致密白云岩岩相学特征再研究. 海洋地质前沿, 37(6): 55-63. [Su D P,He J,Yan Z Y,Shen J Y,Ma X,Fu H P,Li X S,Zhang D J,Liu X Y,Dong G,Yan G J,Xu H. 2021. Restudy on petrographic characteristics of deep tight dolomite in well xike 1 of shidao, Xisha islands. Marine Geology Frontier, 37(6): 55-63] [10] 魏浩天,刘刚,韩孝辉,赵彦彦,吴佳庆,杨俊. 2020. 珊瑚礁对热液流体的地球化学记录: 来自南海西沙永兴岛珊瑚礁稀土元素的证据. 海洋地质与第四纪地质, 40(4): 78-95. [Wei H T,Liu G,Han X H,Zhao Y Y,Wu J Q,Yang J. 2020. Geochemical records of hydrothermal fluids in corals: Evidence of rare earth elements from coral reefs in the Yongxing Island, Xisha, South China Sea. Marine Geology & Quaternary Geology, 40(4): 78-95] [11] 魏喜,祝永军,许红,赵国春,李玉喜. 2006. 西沙群岛新近纪白云岩形成条件的探讨: C、O同位素和流体包裹体证据. 岩石学报, 22(9): 2394-2404. [Wei X,Zhu Y J,Xu H,Zhao G C,Li Y X. 2006. Discussion on Neogene dolostone forming condition in Xisha lsands :evidences from isotope C and O and fluid inclosures. Acta Petrologica Sinica, 22(9): 2394-2404] [12] 修淳,罗威,杨红君,翟世奎,刘新宇,曹佳琪,刘晓锋,陈宏言,张爱滨. 2015. 西沙石岛西科1井生物礁碳酸盐岩地球化学特征. 地球科学(中国地质大学学报), 40(4): 645-652. [Xiu C,Luo W,Yang H J,Zhai S K,Liu X Y,Cao J Q,Liu X F,Chen H Y,Zhang A B. 2015. Geochemical characteristics of reef carbonate rocks in well xike-1 of Shidao Island,Xisha Area. Geoscience(Journal of China University of Geosciences), 40(4): 645-652] [13] 修淳,张道军,翟世奎,刘新宇,曹佳琪,毕东杰,陈奎. 2017. 西沙石岛礁相白云岩稀土元素地球化学特征及成岩环境分析. 海洋通报, 36(2): 151-159,167. [Xiu C,Zhang D J,Zhai S K,Liu X Y,Cao J Q,Bi D J,Chen K. 2017. REE geochemical characteristics and diagenetic environments of reef dolostone in Shi Island,Xisha Islands. Marine Science Bulletin, 36(2): 151-159,167] [14] 邹和平. 1993. 试谈南海海盆地壳属性问题: 由南海海盆及其邻区玄武岩的比较研究进行讨论. 大地构造与成矿学,(4): 293-303. [Zou H P. 1993. On the problem about the crust sattribution of south china sea basin—discussion from comparative study on basalts of seamounts in south china sea basin and the neighboring areas. Geotectonica et Metallogenia,(4): 293-303] [15] 赵彦彦,李三忠,李达,郭玲莉,戴黎明,陶建丽. 2019. 碳酸盐(岩)的稀土元素特征及其古环境指示意义. 大地构造与成矿学, 43(1): 141-167. [Zhao Y Y,Li S Z,Li D,Guo L L,Dai L M,Tao J L. 2019. Rare earth element characteristics of carbonate(rock)and its paleoenvironmental indication. Geotectonica et Metallogenia, 43(1): 141-167] [16] Byrne R H,Sholkovitz E R. 1996. Handbook on the Physics and Chemistry of the Rare Earths. Amsterdam, Elsevier: 497-593. [17] Bolhar R,Wagoner Kranendonk M J. 2007. A non-marine depositional setting for the northern Fortescue Group,Pilbara Craton,inferred from trace element geochemistry of stromatolitic carbonates. Precambrian Research, 155(3-4): 229-250. [18] Bolhar R,Hofmann A,Siahi M,Feng Y X,Delvigne C. 2015. A trace element and Pb isotopic investigation into the provenance and deposition of stromatolitic carbonates,ironstones and associated shales of the~3.0 Ga Pongola Supergroup,Kaapvaal Craton. Geochimica et Cosmo-chimica Acta, 158: 57-78. [19] Bau M,Balan S,Schmidt K,Koschinsky A. 2010. Rare earth elements in mussel shells of the Mytilidae family as tracers for hidden and fossil high-temperature hydro-thermal systems. Earth and Planetary Science Letters, 299(3-4): 310-316. [20] Frimmel H E. 2009. Trace lement distribution in Neopro-terozoic carbonates as palaeoenvironmental indicator. Chemical Geology, 258(3-4): 338-353. [21] Frei R,Døssing L N,Gaucher C,Boggiani P C,Frei K M,Bech Árting T,Crowe S A, Freitas B T. 2017. Extensive oxidative weathering in the aftermath of a late Neoproterozoic glaciation: evidence from trace element and chromium isotope records in the Urucum district(Jacadigo Group)and Puga iron formations(Mato Grosso do Sul,Brazil). Gondwana Research, 49: 1-20. [22] Kidder D L,Krishnaswamy R,Mapes R H. 2003. Elemental mobility inphosphatic shales during concretion growth and implications forprovenance analysis. Chemical Geology, 198(3-4): 335-353. [23] Kamber B S, Webb G E. 2001. The geochemistry of late Archaean microbial carbonate: implications for ocean chemistry and continental erosion history. Geochimica et Cosmochimica Acta, 65(15): 2509-2525. [24] Kamber B S,Bolhar R, Webb G E. 2004. Geochemistry of late Archaean stromatolites from Zimbabwe: evidence for microbial life in restricted epicontinental seas. Precambrian Research, 132(4): 379-399. [25] Kamber B S,Greig A,Collerson K D. 2005. A new estimate for the composition of weathered young upper continental crust from alluvial sediments,Queensland,Australia. Geochimica et Cosmochimica Acta, 69(4): 1041-1058. [26] Kamber B S,Webb G E, Gallagher M. 2014. The rare earth element signal in Archaean microbial carbonate: information on ocean redox and biogenicity. Journal of the Geological Society, 171(6): 745-763. [27] Na Q,Xu H,Su D P, Tao M, ZhangW W, Ji Z P, Wang Q. 2019. Microscopic characteristics and geological significance of tight dolomite in Well Xike-1,XishaIslands,China. China Geology, 2(4): 458-466. [28] Shields G,Stille P. 2001. Diagenetic constraints on the use of ceriumanomalies as palaeoseawater redox proxies: an isotopic and REE studyof Cambrian phosphorites. Chemical Geology, 175(1-2): 29-48. [29] Tanaka K, Kawabe I. 2006. REE abundances in ancient seawater inferred from marine limestone and experi-mental REE partition coefficients between calcite and aqueous solution. Geochemical Journal, 40(5): 425-435. [30] Wagoner Kranendonk M J,Webb G E, Kamber B S. 2003. Geological and trace element evidence for a marine sedimentary environment of deposition and biogenicity of 3.45 Ga stromatolitic carbonates in the Pilbara Craton,and support for a reducing Archaean ocean. Geobiology, 1(2): 91-108. [31] Webb G E, Kamber B S. 2000. Rare earth elements in Holocene reefal microbialites: a new shallow seawater proxy. Geochimica et Cosmochimica Acta, 64(9): 1557-1565. [32] Xu H,Ji Z P,Li S Y, Yang Y Q, Liu S J, Zhang H Y, Lu S S, Shi T Q, Tao T, Qin N, Zhang W W, Su D P. 2018. Zircon SHRIMP U-Pb dating of theNeogene coral reefs,Xisha Islands,South China Sea: implica-tions for tectonic evolution. China Geology, 1(1): 49-60. [33] Zhao Y Y,Zheng Y F,Chen F K. 2009. Trace element and strontium isotopeconstraints on sedimentary environment of Ediacaran carbonates in southern Anhui,South China. Chemical Geology, 265(3-4): 345-362.
