Article Abstract:
A deep oceanic crust study reveals the origin and presence of methane gas in deep crustal layers. Methane gas is an abundant volatile component in vent fluid inclusions in the core at the Southwest Indian Ridge (SWIR). The formation of methane gas may be due to magmatic volatiles trapped within inclusions. The methane layer at SWIR may be the result of mantle upwelling but is more likely produced from the hydrogen that results from the transformation of iron- and magnesium-rich upper-mantle rocks into the serpentine minerals during seawater penetration.
User Contributions:
Comment about this article or add new information about this topic:
Article Abstract:
Large-scale species richness in riverine fish differs between regions as a nonlinear function of contemporary available energy in the system. Research using the potential of artificial neural networks (ANNs) to address some of the fuzzy and nonlinear difficulties found in classical statistical methods for predicting species diversity also found that local habitat heterogeneity in rivers plays a role in the variation in species richness. ANNs have the advantage of being able to take account of nonlinear relationships.
User Contributions:
Comment about this article or add new information about this topic:
Article Abstract:
Research is presented concerning the age of carbon isotopes which have been discharged into the North Atlantic Ocean four rivers. The degradation and pre-aging of terrestrial organic matter carried to the oceans is discussed.
User Contributions:
Comment about this article or add new information about this topic: