粤东海山岛全新世硬壳灰岩的沉积特征及其岩石学意义

孙金龙; 徐辉龙; 丘学林; 沈建伟; 詹文欢

粤东海山岛全新世硬壳灰岩的沉积特征及其岩石学意义

1 中国科学院边缘海重点实验室, 中国科学院南海海洋研究所, 广州 510301;
2 中国科学院研究生院, 北京 100049;
3 中国地质大学资源学院, 武汉 430074

基金项目:

国家自然科学基金(40476025)

广东省自然科学基金项目(06023659)

中国科学院知识创新工程重要方向性项目(KZCX3-SW-234)

详细信息

作者简介:
孙金龙(1979-),男,博士生,主要从事海岸带沉积环境演化与新构造运动研究,E-mail:sunjl@scsio.ac.cn

中图分类号: P588.2
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出版历程
- 收稿日期: 2006-04-17
- 修回日期: 2006-09-29

SEDIMENTARY CHARACTERISTICS OF HOLOCENE COQUINITE FROM THE HAISHAN ISLAND OF EASTERN GUANGDONG PROVINCE AND ITS PETROLOGICAL IMPLICATIONS

1 Key Laboratory of the Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;
2 Graduate School of Chinese Academy of Sciences, Beijing 100049, China;
3 Resource Department, China University of Geosciences, Wuhan 430074, China

摘要

摘要: 粤东海山岛南部海积平原发育有大面积的全新世碳酸盐岩,分布范围极广,从陆上一直延伸到海域中。通过实地地质调查以及岩石薄片的镜下鉴定,发现该区发育的碳酸盐岩贝壳碎屑含量高,经大规模机械分选和搬运,大多数贝壳碎屑的粒径大于2.0 mm,胶结良好,密实,硬度大,岩层以低角度向海倾斜,倾角小于15°,根据其沉积特征和岩石学特性,本文将该处碳酸盐岩定为硬壳灰岩,而非前人所定的海滩岩或贝壳堤岩。据¹⁴C测年数据,自下而上获得典型地质剖面上3个层位的年龄分别为3 080±90、1 920±75和1 330±60 aBP,可以确定该处硬壳灰岩形成于中全新世末期至晚全新世,对应于中全新世的高海平面期。海山岛的硬壳灰岩形成于全新世冰后期海进的滨浅海环境,指示相应时期古海面潮间带至潮下带的高程。沿山麓分布的硬壳灰岩指示相应时期的潮间带,它与发育于海拔8~9 m高处的海蚀刻槽共同指示古海岸线位置。
- 硬壳灰岩 /
- 碳酸盐岩 /
- 全新世 /
- 海山岛
Abstract: There is an extensive area of Holocene carbonate rocks developed in the marine-deposition plain in the south of Haishan Island, eastern Guangdong Province. The carbonate rocks spread from the slope of inland hill to the sea, with a length of 3 km in E-W direction and 0.8 km in N-S direction, and the total area is almost 2.0 km².According to our field surveys as well as sedimentary environment and petrology analyses, the carbonate rock in the Haishan Island is defined as coquinite, rather than beachrock or chenier. The coquinite is well-compacted, well-indurated, firmly cemented, and chiefly composed of fossil debris that was mechanically sorted and has experienced transport and abrasion before deposition.Most of the fossil fragments are larger than 2.0 mm in size. Three ¹⁴C samples were taken from bottom to top on a standard cross section, and their ¹⁴C ages are 3 080±90, 1 920±75 and 1 330±60 aBP respectively. The ¹⁴C data and sedimentary features indicate that the coquinite in Haishan Island was formed in mid-late Holocene (about 4~1.5 ka) in a littoral to shallow-marine environment, corresponding to the mid-Holocene high stand. The coquinite distributed around the foot of the hill indicated the location of paleo-intertidal zone. The paleo-shoreline was confirmed by the distributions of coquinite in the paleo-intertidal zone and the paleo-sea notch.
- coquinite /
- beachrock /
- chenier /
- sea level changes

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参考文献(23)

[1]	陈伟光. 华南海岸带第四纪碳酸盐岩及其地质地理意义[J]. 华南地震, 1990, 10(3):25-32. [CHEN Wei-guang. The coastal Quaternary carbonate rocks of South China and its geological significance[J]. South China Seismology Journal, 1990, 10(3):25-32.]
[2]	杨守仁,杨松. 中国10 ka来海滩岩时空分布与气候变迁[J]. 科学通报, 1996, 41(8):723-727. [YANG Shou-ren, YANG Song. Distribution of beachrocks of last 10 ka in China and climate changes[J]. Chinese Science Bulletin, 1996, 41(8):723-727.]
[3]	吴克刚.海南岛现代风成岩(沙丘岩)的形成及其地貌意义[J].地理研究,1988, 7(2):67-72. [WU Ke-gang. Digenesis of modern aeolianite (Dune-rock) along the coast of Hainan Island and its geomorphologic significance[J]. Geographical Research, 1988, 7(2):67-72.]
[4]	王为,谭惠忠. 贝壳堤的形成与风暴沉积——以广东台山长湾贝壳堤为例[J]. 热带地理,2003,23(3):209-213. [WANG Wei, TAN Hui-zhong. Formation of cheniers and storm deposits-a case study of the coast of South China[J]. Tropical Geography,2003, 23(3):209-213.]
[5]	Sprugeon D, Davis R A, Shinnu E A. Formation of Beachrock'at Siesta Key, Florida and its influence on barrier island development[J]. Marine Geology, 2003, 200:19-29.
[6]	Augustinus P G E G. Cheniers and chenier plains:a general introduction[J]. Marine Geology, 1989, 90:219-229.
[7]	王为,吴正,吴始宣. 华南全新世海岸沙丘岩的成因探讨[J]. 华南师范大学学报, 1990(1):82-86.[WANG Wei, WU Zheng, WU Shi-xuan. Genesis of Holocene coastal-dune-rocks in South China[J]. Journal of South China Normal University(Natural Science Edition), 1990 (1):82-86.]
[8]	毕福志,袁又申,尹云鹏. 广东海山岛晚全新世"海滩岩田"的沉积相及其海岸升降特征的研究[J]. 海洋地质与第四纪地质, 1987, 7(2):45-57. [BI Fu-zhi, YUAN You-shen, YIN Yun-peng. Study of the sedimentary facies of the late Holocene "beachrock field" and on the characteristics of the coastal elevation and subsidence in the Haishan Island, Guangdong Province[J]. Marine Geology and Quaternary Geology, 1987, 7(2):45-57.]
[9]	李建生, 冯炎基. 华南海滩岩及若干问题的讨论[J]. 矿物岩石地球化学通报, 1998, 17(3):183-185. [LI Jian-sheng, FENG Yan-ji. A discussion on beachrocks in South China[J]. Bulletin of Mineralogy, Petrology and Geochemistry, 1998, 17(3):138-185.]
[10]	赵希涛. 中国海岸演变研究[M]. 福州:福建科技出版社,1984.[ZHAO Xi-tao. Research on coast evolution of China[M]. Fuzhou:Science and Technology Press of Fujian, 1984.]
[11]	李平日. 华南全新世海滩岩及其古地理意义[J]. 海洋地质与第四纪地质, 1988, 8(4):21-29. [LI Ping-ri. Holocene beachrock in South China and its paleogeographic significance[J]. Marine Geology and Quaternary Geology, 1988, 8(4):21-29.]
[12]	宗永强,李平日. 粤东全新世海滩岩形成条件初步分析[J]. 热带地理, 1984, 4(4):205-212. [ZONG Yong-qiang, LI Ping-ri. Analysis of condition to form the Holocene beachrock along the coast of eastern Guangdong[J]. Tropical Geography, 1984, 4(4):205-212.]
[13]	ZHAO Xi-tao. Cheniers in China:An overview[J]. Marine Geology, 1989, 90:311-320
[14]	詹文欢,刘以宣,钟建强,等. 粤东沿海全新世海滩岩的特征及其所反映的海平面变化[J].热带海洋,1998, 17(2):24-31. [ZHAN Wen-huan, LIU Yi-xuan, ZHONG Jian-qiang,et al. Characteristics of Holocene beachrocks and the sea level changes along the coast of eastern Guangdong[J]. Tropic Oceanology, 1998, 17(2):24-31.]
[15]	詹文欢,刘以宣,钟建强,等. 从广东沿海海滩岩探讨历史时期海平面变化[J]. 南海研究与开发, 1996, 4:30-35.[ZHAN Wen-huan, LIU Yi-xuan, ZHONG Jian-qiang, et al. Discussing change of sea levels in history based on beachrocks along coast of Guangdong[J]. South China Sea Research and Exploration, 1996 , 4:30-35.]
[16]	李平日,黄镇国,宗永强, 等. 韩江三角洲[M]. 北京:海洋出版社,1987:14-16, 37-39. [LI Ping-ri, HUANG Zhen-guo, ZONG Yong-qiang,et al. Han River Delta[M]. Beijing:China Ocean Press, 1987:14-16, 37-39.]
[17]	Chilingar G V, Bissell H J, Fairbridge R W. Carbonate Rocks:Origin, Occurrence and Classification[M]. Amsterdam:Elsevier Publishing Company, 1967:227-229.
[18]	Calvet F, Cabrera M C, Carracedo J C,et al. Beachrocks from the Island of La Palma(Canary Islands, Spain)[J].Marine Geology, 2003, 197:75-93.
[19]	Kneale D, Viles H A. Beach cement:incipient CaCO₃-cemented beachrock development in the upper intertidal zone, North Uist, Scotland[J]. Sedimentary Geology, 2000, 132:165-170.
[20]	Jones B, Rosen M R, Renaut B W. Silica-cemented beachrock from lake Taupo, North Island, New Zealand[J]. Journal of Sedimentary Research, 1997, 67(5):805-814.
[21]	Neumeier U. Experimental modeling of beachrock cementation under microbial influence[J]. Sedimentary Geology, 1999, 126:35-46.
[22]	王建华. 华南海岸砂丘岩的特征及其与海滩岩的区别[J]. 沉积学报, 1997,15(1):104-110. [WANG Jian-hua. Characteristics of dune rocks in South China coast and their differences with beachrocks[J]. Acta Sedimentologica Sinica,1997, 15(1):104-110.]
[23]	Otvos E G,Price W A.Problems of chenier genesis and terminology-an overview[J]. Marine Geology, 1979,31:251-263.