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The Lost World: Environmental Effects During the Formation of a Giant Volcanic Province

Citation

Coffin, MF and Frey, FA and Wallace, P, The Lost World: Environmental Effects During the Formation of a Giant Volcanic Province, ODP Highlights; International Scientific Contributionss from the Ocean Drilling Program, Joint Oceanographic Institutions, USA, 1, 1, p. 20. (2003) [Internal Newsletter]

Abstract

Large igneous provinces (LIPs) form when extraordinary amountsof mantle-derived magma enter regions of the Earth’s crust. Theintense igneous activity during their creation temporarily increasesthe flux of mass and energy from the mantle to the crust, hydro-sphere, biosphere, and atmosphere, with many possible globalenvironmental effects. During Mesozoic and Cenozoic time, LIPs have typicallyformed in geologically brief (1-10 million year) episodes. Theyoungest LIP formed ~15 million years ago. On continentallithosphere, LIPs are also known as continental flood basalts,which are relatively well studied. Several are associated with massextinctions and environmental changes, although causal relation-ships and feedback loops are not well understood. On transition-al and oceanic lithosphere, respectively, divergent volcanicmargins and oceanic plateaus are relatively understudied, withdrilling being the primary means of sampling. Ocean drilling at the two most voluminous LIPs on Earth, the KerguelenPlateau/Broken Ridge in the southern Indian Ocean and the Ontong Java Plateau in the western Pacific, has providedinformation on the processes that form LIPs and their potentialenvironmental consequences.

Item Details

Item Type:Internal Newsletter
Research Division:Earth Sciences
Research Group:Geology
Research Field:Marine Geoscience
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:Coffin, MF (Professor Mike Coffin)
ID Code:75394
Year Published:2003
Deposited By:IMAS - Directorate
Deposited On:2012-01-30
Last Modified:2012-01-30
Downloads:0

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