The proposal of cold-seep carbonate factory and its paleoclimate significance
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摘要: 碳酸盐工厂的提出及其分类研究对于推动碳酸盐岩沉积学发展具有重要意义，但现行分类方案不足以囊括所有碳酸盐沉积类型，因此亟须从机理和过程层面对碳酸盐工厂类型予以梳理、扩充。传统碳酸盐工厂的碳源主要为大气-海洋中的无机碳库，而一些特殊海相和陆相碳酸盐工厂的碳则主要源于外源碳库，因而两者具有本质上的区别。后者往往对于追溯深时水体环境和气候事件具有重大意义。以冷泉碳酸盐岩为例，正式提出“冷泉碳酸盐工厂”概念，综述了其沉积特征、生物组成及生物地球化学过程，并举例阐述其古气候意义。基于外源碳库的碳酸盐工厂类型理应得到重视。Abstract: The proposal of carbonate factory and its classification study are of great significance for promoting the development of carbonate sedimentology. However, the current classification scheme is not sufficient to cover all carbonate sediments, so it is urgent to clarify different carbonate factories at the level of mechanism and process. The carbon utilized by traditional carbonate factories mainly comes from the atmospheric and oceanic inorganic carbon pools, while some special marine and continental carbonate factories mainly fix carbons from exogenous carbon pools, so the two are fundamentally different. The latter is often of great significance for tracing deep water environment and climate events. Taking hydrocarbon seep carbonate as an example, this paper puts forward the concept of “Cold-seep Carbonate Factory” formally. In addition, its sedimentary characteristics, biological composition and biogeochemical processes have been summarized, and its geological significance has been addressed with an example. The type of carbonate factory based on exogenous carbon pool deserves much attention.
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