Iron Abundance in the Marine Carbonate as a Proxy of the Paleo-Productivity in Hydrocarbon Source Rocks
-
摘要: 准确评估古生产力变化对了解古气候、古海洋演化, 探索石油、天然气的形成机制及分布规律十分重要.尽管众多的地球化学指标被用于表征海洋生产力, 但大多指标容易受后期地质作用的改造而导致信息失真, 其应用仅限于第四纪沉积物.在现代海洋研究的基础上, 本文从海水铁制约海洋生产力的生物地球化学原理出发, 提出了碳酸盐中的铁作为古生产力的一个新指标.该指标用于广西来宾蓬莱滩二叠纪瓜德鲁普统-乐平统全球界限附近海相碳酸盐的研究, 发现它与响应生产力变化的δ13C有相同的变化, 说明海相碳酸盐中的铁可以表征地质历史时期的海洋生产力.Abstract: The assessment of paleo-productivity is of importance, not only for the understanding of paleoclimate and paleoceanography, but for studies on the genesis and the distribution of petroleum and natural gas. A lot of geochemical proxies have been developed to evaluate the past marine productivity. However, most of them are inclined to diagenetic alteration, with the application being limited in Quaternary sediments. Noticeably, dissolved iron deficiency will prevent phytoplankton growth in the modern oceans, and iron trapped in the lattice of carbonate minerals was not easily affected by the post-depositional processes. This raises the possibility of iron abundance as a proxy of paleo-productivity. Here we present an investigation on iron trapped in the marine carbonate in the Permian boundary between the Guadalupian and the Lopingian, Penglaitan, Laibin, Guangxi. Our data show that iron abundance could be used as a proxy of paleo-productivity, supported by its co-variation with δ13C of bulk carbonate which is proposed to relate to the productivity.
-
Key words:
- marine productivity /
- iron /
- Fe3+/Fe2+ /
- marine carbonate
-
图 1 蓬莱滩剖面碳酸盐中铁和碳同位素的组成特征(碳同位素据Wang et al., 2004)
Fig. 1. Variation of iron and carbon isotopic composition in the marine carbonates from the boundary between the Guadalupian and Lopingian, Penglaitan
表 1 广西来宾蓬莱滩二叠纪瓜德鲁普统-乐平统界线碳酸盐相铁的组成
Table 1. Iron in the marine carbonate from Permian boundary between the Guadalupian and Lopingian, Penglaitan, Laibin, Guangxi
-
[1] Blain, S., Quéquiner, B., Armand, L., et al., 2007. Effect of natural iron fertilization on carbon sequestration in the southern ocean. Nature, 446 (7139): 1070-1074. doi: 10.1038/nature05700 [2] Boyd, P. W., Jickells, T., Law, C. S., et al., 2007. Mesoscaleiron enrichment experiments 1993-2005: Synthesis and future directions. Science, 315 (5812): 612-617. doi: 10.1126/science.1131669 [3] Boyd, P. W., Law, C. S., Wong, C. S., et al., 2004. The de-cline and fate of an iron-induced subartic phytoplankton bloom. Nature, 428 (6982): 549-553. doi: 10.1038/nature02437 [4] Boyd, P. W., Watson, A. J., Law, C. S., et al., 2000. A me-soscale phytoplankton bloom in the polar southern ocean stimulated by iron fertilization. Nature, 407 (6805): 695-702. doi: 10.1038/35037500 [5] Chen, J. F., Zhang, S. C., Sun, S. L., et al., 2006. Main fac-tors influencing marine carbonate source rock forma-tion. Acta Geologica Sinica, 80 (3): 467-472 (in Chi-nese with English abstract). [6] Corale, K. H., Johnson, K. S., Fitzwater, S. E., et al., 1996. A massive phytoplankton bloom induced by an ecosys-tem-scale iron fertilization experiment in the equatorial Pacific ocean. Nature, 383 (6600): 495-501. doi: 10.1038/383495a0 [7] Henderson, G. M., 2002. New oceanic proxies for paleocli-mate. Earth and Planetary Science Letters, 203 (1): 1-13. doi: 10.1016/S0012-821X(02)00809-9 [8] Hutchins, D. A., Bruland, K. W., 1998. Iron-limited diatom growth and Si: N uptake ratios in a coastal upwelling regime. Nature, 393 (6685): 561-564. doi: 10.1038/31203 [9] Jin, Y. G., Shen, S. Z., Henderson, C. M., et al., 2007. The Global Stratotype Section and Point (GSSP) for the boundary between the Guadalup and Lopingian series (Permian). Journal of Stratigraphy, 31 (1): 1-13 (inChinese with English abstract). [10] Martin, J. H., Fitzwater, S. E., 1988. Iron deficiency limits phytoplankton growth in the north-east Pacific subarc-tic. Nature, 331: 341-343. doi: 10.1038/331341a0 [11] Morel, F. M. M., Price, N. M., 2003. The biogeochemical cy-cles of trace metals in the oceans. Science, 300 (5621): 944-947. doi: 10.1126/science.1083545 [12] Pan, H. X., Hu, C. Y., Wang, H. M., et al., 2007. Determi-nation of trace Fe (Ⅱ) in carbonate phase by spectro-photometry with 1, 10-phenanthroline. Rock and Miner-al Analysis, 26 (3): 198-200 (in Chinese). [13] Paytan, A., Griffith, E. M., 2007. Marine barite: Recorder of variations in ocean export productivity. Deep-Sea Re-searchⅡ, doi: 10.1016/j.dsr2.2007.01.007. [14] Rimstidt, J. D., Balog, A., Webb, J., 1998. Distribution of trace elements between carbonate minerals and aqueous solutions. Geochimicaet Cosmochimica Acta, 62 (11): 1851-1863. doi: 10.1016/S0016-7037(98)00125-2 [15] Tenger, Liu, W. H., Xu, Y. C., et al., 2005. Correlative study on parameters of inorganic geochemistry and hydrocar-bon source rocks formative environment. Advances in Earth Science, 20: 193-200 (in Chinese with Englishabstract). [16] Tsuda, A., Takeda, S., Saito, H., et al., 2003. A mesoscaleiron enrichment in the weastern subartic Pacific induces a large centric diatom bloom. Science, 300: 958-961. doi: 10.1126/science.1082000 [17] Wang, W., Cao, C. Q., Wang, Y., 2004. The carbon isotope excursion on GSSP candidate section of Lopingian-Guadalupian boundary. Earth and Planetary Science Letters, 220 (1-2): 57-67. doi: 10.1016/S0012-821X(04)00033-0 [18] Zhang, Z. B., Chen, Z. D., Liu, L. S., et al., 2004. Principles and applications of marine chemistry: Marine chemistry of inshore in China. Ocean Press, Beijing (in Chinese). [19] Zhuang, G. S., Yi, Z., Wallace, G. T., 1995. Iron (Ⅱ) in rain-water, snow, and surface seawater from a coastal envi-ronment. Marine Chemistry, 50 (1-4): 41-50. doi: 10.1016/0304-4203(95)00025-M [20] 陈践发, 张水昌, 孙省利, 等, 2006. 海相碳酸盐岩优质烃源岩发育的主要影响因素. 地质学报, 80 (3): 467-472. doi: 10.3321/j.issn:0001-5717.2006.03.021 [21] 金玉玕, 沈树忠, Henderson, C. M., 等, 2007. 瓜德鲁普统(Guadalupian) -乐平统(Lopingian) 全球界线层型剖面和点(GSSP). 地层学杂志, 31 (1): 1-13. doi: 10.3969/j.issn.0253-4959.2007.01.001 [22] 潘涵香, 胡超涌, 王红梅, 等, 2007. 邻二氮菲分光光度法测定碳酸盐相中微量亚铁. 岩矿测试, 26 (3): 198-200. doi: 10.3969/j.issn.0254-5357.2007.03.006 [23] 腾格尔, 刘文汇, 许永昌, 等, 2005. 无机地球化学参数与有效烃源岩发育环境的相关研究. 地球科学进展, 20 (2): 193-200. doi: 10.3321/j.issn:1001-8166.2005.02.009 [24] 张正斌, 陈镇东, 刘莲生, 等, 2004. 海洋化学原理和应用——中国近海的海洋化学. 北京: 海洋出版社. -
下载:
点击查看大图
图(1) / 表(1)
计量
- 文章访问数: 2827
- HTML全文浏览量: 113
- PDF下载量: 170
- 被引次数: 0
