백악기 중기 해양 무산소 사건 2 동안의 생지화학적 순환 = Biogeochemical Cycles during the mid-Cretaceous Oceanic Anoxic Event 2

다국어 초록 (Multilingual Abstract)

Oceanic Anoxic Event 2 (OAE2) represents a period of mid-Cretaceous when black shale was depositedworldwide. This short period of perturbations in the global biogeochemical cycles spans the Cenomanian-Turonianboundary, marking the peak of the Cretaceous greenhouse, which is characterized by elevated atmospheric pCO2, sea level highstand, and expansion of oxygen minimum zone. Since the pioneering work in the 1970s, numerous studieshave investigated the cause and consequences of the event based on geochemical and isotope proxies, and it is nowwidely accepted that the enhanced primary production and volcanism during the Cenomanian-Turonian boundaryinterval were the key environmental factors that triggered OAE2. This study briefly reviews previous OAE2 studiesof the carbon, sulfur, and trace metal cycles for mechanistic understanding of the biogeochemical processes duringthe event.

국문 초록 (Abstract)

백악기 중기, 세노마눔절-투로니아절에 발생한 해양 무산소 사건인 Oceanic Anoxic Event 2 (OAE2)는 다량의유기물을 포함한 흑색셰일이 전세계적으로 퇴적된 단기간의 탄소 순환 교란 사건이다. 백악기 후기의 온실 지구의 환경(높은 CO2 농도, 고해수면, 해양의 무산소 환경 확장)은 탄소, 황 및 여타 주요 원소의 생지화학 순환의 교란과 밀접하게 상호 작용하였다. 1970년대 최초 명명 이후 동위원소를 포함한 화학적 지시자 연구가 활발하게 진행되었으며, 그 결과 화산 활동과 해양 표층의 유기물 생산 증가가 무산소 환경 발달의 주된 원인으로 여겨진다. 본 논평에서는 OAE2의 기작을 탄소 및 황, 미량 금속원소의 순환을 중심으로 살펴보고자 한다.

참고문헌 (Reference)

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