2017年03期

周洋,陈芳,苏新,吴聪,雷知生.南海东沙海域MIS 3期冷泉甲烷渗漏的钙质生物溶解证据[J].微体古生物学报, 2017, 34(03): 257-267.

ZHOU Yang,CHEN Fang,SU Xin,WU Cong,LEI Zhisheng.METHANE SEEP ACTIVITY IN THE DONGSHA AREA OF THE SOUTH CHINA SEA, CHINA DURING MARINE ISOTOPE STAGE 3:INSIGHT FROM DISSOLUTION OF THE CALCAREOUS FOSSILS[J].Acta Micropalaeontologica Sinica, 2017, 34(03): 257-267.

南海东沙海域MIS 3期冷泉甲烷渗漏的钙质生物溶解证据
周洋 1 * 陈芳 1 苏新 2 吴聪 1 雷知生 1
0

+ 作者地址

1国土资源部海底矿产资源重点实验室, 广州海洋地质调查局, 广州 510075;

2中国地质大学(北京), 北京 100083

对南海东沙海域DH-CL5PC岩心开展了碳酸钙含量、钙质生物壳体保存状况,有孔虫群落结构组成及氧碳同位素分析,结果发现该岩心MIS 3期碳酸钙含量极低、5个层位钙质生物壳体出现显著溶解现象。发生溶解层位各门类钙质生物化石丰度显著降低,底栖有孔虫与浮游有孔虫丰度比例(底栖/浮游)大于1,有孔虫壳体化学溶蚀特征明显。分析其原因认为,陆源物质的稀释作用及潜在的钙质生物溶解作用共同导致了该岩心的碳酸钙含量极低,而甲烷的有氧氧化过程所形成的偏酸性环境可能是导致钙质生物壳体发生显著溶解的主要原因。根据有孔虫群落结构和钙质生物化石保存状况的差异性,推测DH-CL5PC岩心所在区域MIS 3期以来至少经历过5次甲烷渗漏至海底附近低氧或富氧区域的过程,而各期次甲烷渗漏的强度可能有所差异。钙质生物壳体溶解现象结合其他指标一定程度上可以作为反演地质历史时期甲烷渗漏过程和强度的有效指标。
语种: 中文   
基金: 国家自然科学基金项目(41506065,41372012)。
李学杰,刘 坚,陈 芳等,2008.南海北部晚更新世以来的碳酸盐旋回.第四纪研究, 28 (3):431-436 李 丽,王 慧,罗布次仁等,2008.南海北部4万年以来有机碳和碳酸盐含量变化及古海洋学意义.海洋地质与第四纪地质, 28 (6):79-85 张兰兰,陈木宏,陈 忠等,2010. 南海表层沉积物中的碳酸钙含量分布及其影响因素,地球科学——中国地质大学学报, 35 (6):891-898 陈 芳,苏 新,Nurnberg D等,2006.南海东沙海域末次冰期以来的沉积特征. 海洋地质与第四纪地质, 26:9-17 陈 芳,庄 畅,周 洋等,2015. 南海神狐海域MIS12期以来的碳酸盐旋回与水合物分解.现代地质, 29 (1):145-154 陈荣华,徐 建,孟 诩等,2003.南海东北部表层沉积中微体化石与碳酸盐溶跃面和补偿深度.海洋学报, 25 (2):48-56 郑洪波,杨文光,贺 娟等,2008.南海的氧同位素3期. 第四纪研究, 28 (1):68-78 BÜHRING C,SARNTHEIN M,ERLENKEUSER H,2004. Toward a high resolution stable isotope stratigraphy of the last 1.1 m.y.:site 1144,South China Sea. In:Proceedings of the Ocean Drilling Program,Scientific Results, 184 (Chapter 2).http://www-odp.tamu.edu/publications/184_SR/205/205.htm CAI W J, CHEN F Z,POWELL E N et al., 2006. Preferential dissolution of carbonate shells driven by petroleum seep activity in the Gulf of Mexico. Earth and Planetary Science Letters, 248:227-243 CAMPBELL K A,2006. Hydrocarbon seep and hydrothermal vent paleoenvironments and paleontology:past developments and future research directions. Palaeogeography,Palaeoclimatology,Palaeoecology, 232:362-407 CHEN Fang,SU Xin,NURNBERG D et al.,2006. Lithologic features of sediments characterized by high sedimentation rates since the last Glacial Maximun from Dongsha area of the South China Sea. Marine Geology & Quaternary Geology, 26:9-17 (in Chinese with English abstract) CHEN Fang,ZHUANG Chang,ZHOU Yang et al.,2015. Carbo-nate cycles and gas hydrate dissolution in Shenhu area of the South China Sea since MIS 12 stage. Geoscience, 29 (1):145-154 (in Chinese with English abstract) CHEN Ronghua,XU Jian,MENG Xu et al., 2003. Microorganisms and carbonate lysocline depth and CCD in surface sediment of the northeastern South China Sea. Acta Oceanologica Sinica, 25 (2):48-56 (in Chinese with English abstract) DE GARIDEL-THORON T,BEAUFORT L,BASSINOT F,HENRY P,2004. Evidence for large methane releases to the atmosphere from deep-sea gas-hydrate dissociation during the last glacial episode. PNAS, 101 (25):9187-9192 FONTANIER C,KOHO K A,GONI-URRIZA M S et al.,2014. Benthic foraminifera from the deep-water Niger delta (Gulf of Guinea):assessing present-day and past activity of hydrate pockmarks. Deep-sea ResearchⅠ, 94:87-106 HAN X, SUESS E,LIEBETRAU V et al.,2014. Past methane release events and environmental conditions at the upper continental slope of the South China Sea:constraints by seep carbonates. International Journal of Earth Science, 103 (7):1873-1887 HESSLEBO S P,GROCKE D R,JENKYNS H C et al.,2000. Massive dissociation of gas hydrate during a Jurassic oceanic anoxic event. Nature, 406:392-395 HUANG C Y,CHIEN C W,ZHAO M X et al.,2006. Geological study of active cold seeps in the syncollision accretionary prism Kaoping Slope off SW Taiwan. Terrestrial Atmospheric & Oceanic Sciences, 17 (4):679-702 JIAN Z,WANG L,KIENAST M et al.,1999. Benthic foraminifera paleoceanography of the South China Sea over the last 40,000 years. Marine Geology, 156:159-186 JORISSEN F,FONTANIER C,THOMAS E,2007. Paleoceanogra phical proxies based on deep-sea benthic foraminiferal assemblage characteristics. Developments in Marine Geology,Volum1,Division Ⅲ,Faculty Publications. 263-325 JUDDY A G,2004.Natural seabed seeps as sources of atmospheric methane. Environmental Geology, 46:988-996 KAIHO K,1999. Effect of organic carbon flux and dissolved oxygen on the benthic foraminiferal oxygen index (BFOI). Marine Micropaleontology, 37:67-74 KENNETT J,CANNARIATO K G,HENDY I L et al.,2000. Carbon isotopic evidence for methane hydrate instability during Quaternary interstadials. Science, 288:128-133 LI D,CHIANG T L,KAO S J et al.,2017. Circulation and oxygenation of the glacial South China Sea. Journal of Asian Earth Sciences, 138:387-398 LE J,SHACKLETON N J,1998. Carbonate dissolution fluctuations in the western equatorial Pacific during the Late Quaternary. Paleoceanography, 7 (1):21-42 LI L,QU T,2006.Thermohaline circulation in the deep South China Sea basin inferred from oxygen distributions. Journal of Geophysical Research, Oceans,111,C05017 LI Li,WANG Hui,LUO Buciren et al., 2008. The characterizations and paleoceanographic significances of organic and inorganic carbon in northern South China Sea during past 40ka. Marine Geo-logy & Quaternary Geology, 28 (6):79-85 (in Chinese with English abstract) LI Xuejie,LIU Jian,CHEN Fang et al.,2008. Carbonate cycles since late Pleistocene in the northern South China Sea. Quaternary Sciences, 28 (3):431-436 (in Chinese with English abstract) LUFF R,KLAUCKE I,SUESS E et al.,2005.Simulation of long-term feedbacks from authigenic carbonate formation at cold vent sites. Chemical Geology, 216:157-174 MARTIN W R,SAYLES F L,2006. Organic matter oxidation in deep-sea sediments:distribution in the sediment column and implications for calcite dissolution. Deep-sea Research Ⅱ, 53:771-792 MURRAY J W,2006. Ecology and Applications of Benthic Forami-nifera. Cambridge:Cambridge University Press. 12-426 PANIERI G,SEN GUPTA B K,2008.Benthic foraminifera of the Blake Ridge hydrate mound,western North Atlantic Ocean. Marine Micropaleontology, 66:91-102 POWELL E N,PARSONS-HUBBARD K M,CALLENDER W R et al.,2002. Taphonomy on the continental shelf and slope:two-year trends Gulf of Mexico and Bahamas. Palaeogeography,Palaeoclimatology,Palaeoecology, 184:1-35 RATHBURN A E,LEVIN L A,HELD Z et al.,2000. Benthic foraminifera associated with cold methane seeps on the northern California margin:ecology and stable isotopic composition. Marine Micropaleontology, 38:247-266 SASSEN R,ROBERTS H H,CARNEY R et al.,2004.Free hydrocarbon gas,gas hydrate,and authigenic minerals in chemosynthetic communities of the northern Gulf of Mexico continental slope:relation to microbial processes. Chemical Geology, 205:195-217 SANDERS D, 2003. Syndepositional dissolution of calcium carbonate neritic carbonate environments:geological recognition,processes,potential significance. Journal of African Earth Sciences, 36:99-134 WANG N,HUANG B Q,LI H,2016. Deep-water carbonate dissolution in the northern South China Sea during Marine Isotope Stage 3. Journal of Palaeogeography, 5 (1):100-107 ZHANG Lanlan,CHEN Muhong,CHEN Zhong et al.,2010. Distribution of calcium carbonate and its controlling factors in surface sediments of the South China Sea. Earth Science-Journal of China University Geosciences, 35 (6):891-898 (in Chinese with English abstract) ZHENG Hongbo,YANG Wenguang,HE Juan et al.,2008. Marine isotope stage 3 (MIS 3) of South China Sea. Quaternary Sciences, 28 (1):68-78 (in Chinese with English abstract)

erweima erweima 版权所有 © 《微体古生物学报》编辑部 电话:025-83282122 通讯地址:南京市北京东路39号