Quaternary Calcareous Algae from Well Xike-1 in Xisha Islands and Its Ecological Function
-
摘要: 对西沙群岛西科1井第四纪地层中的钙藻进行了初步研究, 共鉴定钙藻3科7属, 包括红藻门珊瑚藻科让氏藻属、蟹手藻属、珊瑚藻属、石枝藻属和石孔藻属, 以及绿藻门松藻科仙掌藻属和粗枝藻科伞轴藻属.通过对地层中钙藻形态功能的分析, 西科1井第四纪早期海水较深, 沉积环境为礁前相, 中期外礁坪和内礁坪交替沉积, 至晚期出现短时间的泻湖相之后沉积环境演变为礁后滩相.西科1井第四纪钙藻在造礁功能上主要体现在2个方面: (1)通过自身的钙化作用, 为生物礁的生长供应微小碳酸盐颗粒沉积物; (2)利用自身形成的节片结构和生物捆扎-粘结结构参与造礁.Abstract: This paper presents our study of the calcareous algae in the well Xike-1, Xisha Islands, and it is found that there are 3 families and 7 genera in the Quaternary sedimentary deposit mainly including Rhodophyta Corallinaceae Jania, Amphiroa, Corallina, Lithothamnium, Lithoporella and Rhodophyta Chlorophyta Codiaceae Halimeda and Dasycladaceae Cymopolia. Analysis of the stratigraphic distribution of the calcareous algae in the well Xike-1 shows that it was forereef facies in the early Quaternary and then became the outer reef flat facies alternated with the inner reef flat facies in the middle Quaternary. In the later Quaternary, it developed into the backreef beach facies mixed with brief lagoon facies. Calcareous algae played the role of providing calcareous skeleton debris and building reef framework.
-
Key words:
- calcareous algae /
- reef-building function /
- Quaternary /
- well Xike-1 /
- Xisha Islands /
- marine geology
-
图 1 西沙群岛西科1井第四纪珊瑚藻科
a.深度:0.03 m;b.深度:18.22 m;c.深度:19.71 m,d.深度:21.36 m;e.深度:1.11 m,f.深度:1.11 m;深度:63.71 m;i.深度:61.64 m.a.珊瑚藻属Corallina Linnaeus;b~d.让氏藻属Jania Lamouroux;e,f.蟹手藻属Amphiroa Lamouroux;g,h.石枝藻属Lithothamnium Philippi;i.石孔藻属Lithoporella Foslie
Fig. 1. Quaternary Corallinaceae of Xike-1 on Xisha Island
-
[1] Cai, F., Xu, H., Hao, X.F., et al., 1996. Comparative Sedimentology of Late Tertiary Organic Reefs in Xisha-Northern South China Sea. Acta Sedimentologica Sinica, 14(4): 61-69 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-CJXB604.007.htm [2] Chen, G.W., 2003. Basic Characteristics of Formation of Bioherm and Reef Oil-Gas Pools in the South China Sea. Marine Geology Letters, 19(7): 32-37 (in Chinese with English abstract). http://www.cnki.com.cn/Article/CJFDTotal-HYDT200308008.htm [3] Fan, J.S., Zhang, W., 1985. On the Basic Concept and Classification of Organic Reefs and Their Main Identifying Criteria. Acta Petrologica Sinica, 1(3): 45-59, 97 (in Chinese with English abstract). http://www.researchgate.net/publication/285616164_On_the_basic_concept_and_classification_of_organic_reefs_and_their_main_identifying_criteria [4] Gong, Z.S., 2009. Reef: An Important Exploration Realm in the Deepwater Areas, the Northern South China Sea. China Offshore Oil and Gas, 21(5): 289-295 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-ZHSD200905000.htm [5] Han, C.R., Meng, X.Y., 1990. Foraminiferal Fauna Distribution in Reef-Facies Beds since Late Miocene in Xisha Islands and Its Significance. Marine Geology & Quaternary Geology, 10(2): 65-81 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-HYDZ199002007.htm [6] Liang, M.S., 1981. The Ostracoda Fossils of Well Xiyong 1, Xisha Islands. Marine Geological Research, (1): 76 (in Chinese). [7] Qin, G.Q., 1987. A Preliminary Study on Foraminiferal Assemblages of Well 1 Xiyong, Xisha Islands and Their Coral Reef Formation. Journal of Tropical Oceanography, 6(3): 10-20 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-RDHY198703001.htm [8] Wang, Y.J., Gou Y.X., Zhang, B.G., et al., 1996. Studies of Miocene Strata, Biota and Palaeoenvironment from Xi-Chen No. 1 Hole in XishaIslands. Acta Micropalaeontologica Sinica, 13(3): 215-223 (in Chinese with English abstract). [9] Wray, J.L., 1977. Calcareous Algae. Developments in Palaeontology and Stratigraphy. Elsevier, Amsterdam, 185. [10] Xu, H., Cai, F., Wang, Y.J., et al., 1999a. Evolution of the Bioreefs and the Reef-Building Function of Algae in Miocene in Xisha Islands. Chinese Science Bulletin, 44(13): 1435-1439 (in Chinese). doi: 10.1360/csb1999-44-13-1435 [11] Xu, H., Wang, Y.J., Cai, F., et al., 1999b. The Biostratigraphy, the Reef-Building Function of Algae and the Characters of the Reef Evolution in Miocene in Xisha Islands. Science Press, Beijing (in Chinese). [12] Zhang, M.S., 1990. Quaternary Reef Stratigraphic Division in Hole Xiyong-1. Marine Geology & Quaternary Geology, 10(2): 57-64 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-HYDZ199002006.htm [13] Zhang, M.S., 1991. Quaternary Events in Xisha Coral Reef Region. Quaternary Sciences, (2): 165-177 (in Chinese with English abstract). http://www.dsjyj.com.cn/EN/abstract/abstract10070.shtml [14] Zhang, M.S., He, Q.X., 1989. A Study on Quaternary Stratigraphy of Reef Deposits on Xisha Islands. Quaternary Sciences, (2): 143-154 (in Chinese with English abstract). http://www.cnki.com.cn/Article/CJFDTotal-DSJJ198902006.htm [15] Zhang, X.N., Liang, M.S., 1982. New Species of Ostracoda Fossils in Xiyong No. 1 Well. Marine Geological Research, 2(4): 72-79 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-HYDZ198204011.htm [16] 蔡峰, 许红, 郝先锋, 等, 1996. 西沙-南海北部晚第三纪生物礁的比较沉积学研究. 沉积学报, 14(4): 61-69. https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB604.007.htm [17] 陈国威, 2003. 南海生物礁及礁油气藏形成的基本特征. 海洋地质动态, 19(7): 32-37. https://www.cnki.com.cn/Article/CJFDTOTAL-HYDT200308008.htm [18] 范嘉松, 张维, 1985. 生物礁的基本概念、分类及识别特征. 岩石学报, 1(3): 45-59, 97. doi: 10.3321/j.issn:1000-0569.1985.03.005 [19] 龚再升, 2009. 生物礁是南海北部深水区的重要勘探领域. 中国海上油气, 21(5): 289-295. doi: 10.3969/j.issn.1673-1506.2009.05.001 [20] 韩春瑞, 孟祥营, 1990. 西沙晚中新世以来礁相地层中有孔虫动物群的分布及其意义. 海洋地质与第四纪地质, 10(2): 65-81. https://www.cnki.com.cn/Article/CJFDTOTAL-HYDZ199002007.htm [21] 梁名胜, 1981. 西沙群岛"西永一井"的介形类化石. 海洋地质研究, (1): 76. https://www.cnki.com.cn/Article/CJFDTOTAL-HYDZ198101008.htm [22] 秦国权, 1987. 西沙群岛"西永一井"有孔虫组合及该群岛珊瑚礁成因初探. 热带海洋, 6(3): 10-20. https://www.cnki.com.cn/Article/CJFDTOTAL-RDHY198703001.htm [23] 王玉净, 勾韵娴, 章炳高, 等, 1996. 西沙群岛西琛一井中新世地层、古生物群和古环境研究. 微体古生物学报, 13(3): 215-223. https://www.cnki.com.cn/Article/CJFDTOTAL-WSGT603.000.htm [24] 许红, 蔡峰, 王玉净, 等, 1999a. 西沙中新世生物礁演化与藻类的造礁作用. 科学通报, 44 (13): 1435-1439. https://www.cnki.com.cn/Article/CJFDTOTAL-KXTB199913016.htm [25] 许红, 王玉净, 蔡峰, 等, 1999b. 西沙中新世生物地层和藻类的造礁作用与生物礁演变特征. 北京: 科学出版社. [26] 张明书, 1990. 西沙西永1井礁相第四纪地层的划分. 海洋地质与第四纪地质, 10(2): 57-64. https://www.cnki.com.cn/Article/CJFDTOTAL-HYDZ199002006.htm [27] 张明书, 1991. 西沙珊瑚礁区的第四纪事件. 第四纪研究, (2): 165-177. doi: 10.3321/j.issn:1001-7410.1991.02.009 [28] 张明书, 何起祥, 1989. 西沙礁相第四纪地层初步研究. 第四纪研究, (2): 143-154. doi: 10.3321/j.issn:1001-7410.1989.02.005 [29] 张锡南, 梁名胜, 1982. 西永一井介形类化石几个新种. 海洋地质研究, 2(4): 72-79. https://www.cnki.com.cn/Article/CJFDTOTAL-HYDZ198204011.htm