Mesozoic Oceanic Anoxic Events: Records from India and future scope

This paper presents a review of the Mesozoic Oceanic Anoxic Event (OAE) studies, carried out from India. It also provides a summary of the researches pursued on biostratigraphic, isotopic, and organic geochemical proxies for establishing Oceanic Anoxic Events (OAEs) from the Mesozoic sedimentary sequences of the Indian Subcontinent. From Indian sedimentary basins, studies are available on OAE-1a, OAE-1b, OAE-1d, OAE-2, and OAE-3. From the Cauvery Basin records of OAE-1b, OAE-1d, OAE-2, and OAE-3 are available. From the Spiti Valley records are present on OAE-2 (Chikkim Formation) only, and the possibilities of late Valanginian Weissert Event (W-OAE), latest Hauterivian Faraoni Event (F-OAE) and OAE-1a are expected to be present in Giumal Formation. Nonetheless, the Black shale from Rudramata Shale, Jhuran Formation indicate possible late Jurassic OAE, based on the character of sedimentary facies and organic geochemical results. There is also, possibility of OAE-1a and OAE-1b in the Ukra and Upper member of the Bhuj Formation. This paper aims to provide a comprehensive introduction on global and regional OAEs records from the Indian subcontinent and a significant window on available knowledge of these events in India and supply significant attention for the future research possibilities from the Indian landmass.