生物地球化学循环
沉积沉积环境
太古宙
氮气
背景(考古学)
显生宙
地球科学
氮同位素
同位素
环境科学
沉积岩
地质记录
古生物学
早期地球
缺氧水域
地质学
稳定同位素比值
海洋学
环境化学
放射化学
化学
氮气循环
构造盆地
新生代
物理
量子力学
有机化学
作者
Colin Mettam,Aubrey L. Zerkle
标识
DOI:10.1017/9781108847186
摘要
Nitrogen is an essential nutrient for life, and its sources and cycling have varied over earth history. Stable isotope ratios of nitrogen compounds (expressed as δ15N, in ‰) are preserved in the sedimentary record and track these changes, providing important insights into associated biogeochemical feedbacks. Here we review the use of nitrogen stable isotope geochemistry in unravelling the evolution of the global N cycle in deep time. We highlight difficulties with preservation, unambiguous interpretations, and local versus global effects. We end with several case studies illustrating how depositional and stratigraphic context is crucial in reliably interpreting δ15N records in ancient marine sediments, both in ancient anoxic (Archean) and more recent well oxygenated (Phanerozoic) environments.
科研通智能强力驱动
Strongly Powered by AbleSci AI