海相碳酸盐岩中的铁: 烃源岩古生产力评估的新指标

胡超涌; 潘涵香; 马仲武; 沈尔卜; 颜佳新

Volume 32 Issue 6

Jun. 2007

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Article Navigation > Earth Science > 2007 > 32(6): 755-758

HU Chao-yong, PAN Han-xiang, MA Zhong-wu, SHEN Er-bu, YAN Jia-xin, 2007. Iron Abundance in the Marine Carbonate as a Proxy of the Paleo-Productivity in Hydrocarbon Source Rocks. Earth Science, 32(6): 755-758.

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Iron Abundance in the Marine Carbonate as a Proxy of the Paleo-Productivity in Hydrocarbon Source Rocks

Key Laboratory of Biogeology and Environmental Geology of Ministry of Education, China University of Geosciences, Wuhan 430074, China

Received Date: 2007-08-15
Publish Date: 2007-11-25

Abstract

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.
- marine productivity,
- iron,
- Fe³⁺/Fe²⁺,
- marine carbonate

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References(24)

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