Now showing items 1-6 of 6
Absarokites from the Western Mexican Volcanic Belt : constraints on mantle wedge conditions
(Massachusetts Institute of Technology, 2002)
We have investigated the near liquidus phase relations of a primitive absarokite from the Mascota region in Western Mexico. Sample M. 102 was chosen because it has high MgO contents, a high Mg# and Fo90 olivine phenocrysts, ...
Phosphate-mineral interactions and potential consequences for nutrient cycling
(Massachusetts Institute of Technology, 2008)
Biogeochemical cycling of phosphate is a key component in the overall production rate of coastal ecosystems. Mineral phases in the near-shore sediments play a significant role in the return of phosphate remineralized in ...
Structure and evolution of an oceanic megamullion on the Mid-Atlantic ridge at 27N̊
(Massachusetts Institute of Technology, 2001)
Megamullions in slow-spreading oceanic crust are characterized by smooth "turtle-back" morphology and are interpreted to be rotated footwalls of long-lived detachment faults. Megamullions have been analyzed in preliminary ...
Examining the effects of mid ocean ridge topography on 3D marine magnetometric resistivity model responses
(Massachusetts Institute of Technology, 2004)
Methods which measure seafloor resistivity are uniquely suited to studying hydrothermal circulation in the crust. The magnetometric resistivity (MMR) technique is a galvanic method which uses a bipole current source with ...
Western South Atlantic holocene and glacial deepwater hydrography derived from benthic foraminiferal Cd/Ca and stable carbon isotope data
(Massachusetts Institute of Technology, 1999)
Today, deep waters produced in the North Atlantic are exported through the western South Atlantic. Antarctic intermediate water (AAIW) also enters the Atlantic in this region. Circumpolar deep water (CDW) fills the depths ...
An inverse approach to understanding benthic oxygen isotope records from the last deglaciation
(Massachusetts Institute of Technology, 2014)
Observations suggest that during the last deglaciation (roughly 20,000-10,000 years ago) the Earth warmed substantially, global sea level rose approximately 100 meters in response to melting ice sheets and glaciers, and ...