摘要
陆相烃源岩提供了中国主要的油气资源,但是其成因机制的研究显得尤为薄弱。近年来对海相烃源岩成因机制的研究表明,海洋沉积物中活性铁的埋藏对海相烃源岩中有机碳的埋藏起到了重要的调节和控制作用。通过对湖泊中铁循环及其生物地球化学效应进行回顾,指出湖泊沉积物中铁埋藏过程与海洋中类似,同样受到硫酸盐还原作用的影响,并引起营养盐(主要是磷)的大规模释放,从而使得湖泊处于富营养状态,有利于湖泊有机碳的生产和埋藏。松辽盆地在其发展过程中受到海侵作用的影响,因此该过程可能对松辽优质烃源岩的形成发挥了重要作用。
Most of the oil and gas of China originated from the terristrial source rock while with poor constrain on the genesis of these rocks. Recent research on the marine counterpart, however, has shown that the burial of reactive iron is vital for the accumulation of organic carbon. This paper reviewed the iron cycle and its biogeochemical effects in the lake, and suggested that the reactive iron burial in the lake sediments should be affected by the sulfate reduction just like in the marine realm. The enhanced sulfate reduction will cause the large scale release of the nutrients, i.e., mainly the phosphate that will in turn stimulate the eutrophication of the lake favorable for the production and burial of organic carbon. Marine incursion events occurred during the evolution of the Songliao Basin which would have contributed for the formation of the high quality source rock in the Songliao Basin.
出处
《自然杂志》
2015年第2期79-85,共7页
Chinese Journal of Nature
基金
国家自然科学基金(41373082)
国家重点基础研究发展计划(973计划)(2012CB822005)
中央高校基本科研业务费优秀教师项目(2652013041)资助
关键词
活性铁埋藏
松辽盆地
烃源岩成因
burial of reactive iron, Songliao Basin, genesis of source rock
