Kastner's research expertise is in marine geochemistry; early research focused on the origin of authigenic feldspars and of zeolites in oceanic sediments, the opal-A and the control of dolomite formation.
12.
In order to calculate reliable comminution ages, authigenic uranium must be removed from the surface and pores of silicate minerals . used an etching procedure to evaluate the completeness of existing sample pre-treatment procedures.
13.
There is a clear relationship between known hydrocarbon discoveries at great depth in the Gulf slope and chemosynthetic communities, hydrocarbon seepage, and authigenic minerals including carbonates at the seafloor ( Sassen et al ., 1993a and b ).
14.
In benthic marine areas with strong methane releases from fossil reservoirs ( e . g . at cold seeps, mud volcanoes or gas hydrate deposits ) AOM can be so high that chemosynthetic organisms like filamentous sulfur bacteria ( see Beggiatoa ) or animals ( clams, tube worms ) with symbiont sulfide-oxidizing bacteria can thrive on the large amounts of hydrogen sulfide that are produced during AOM . The production of bicarbonate from AOM can result in the precipitation of calcium carbonate or so-called authigenic carbonates.
