Showing papers in "Earth-Science Reviews in 1992"

TL;DR: A detailed description of the techniques and analytical procedures for sampling, grain size determinations, and for precise and accurate AAS determination of the major and trace metals in marine sediments and suspended particulate matter is given in this paper.

TL;DR: In this article, the authors presented a novel description of the phenomenology of the Eastern Mediterranean based upon a comprehensive pooled hydrographic data base collected during 1985-1987 and analyzed by cooperating scientists from several institutions and nations (the POEM project).

TL;DR: Torsvlk et al. as discussed by the authors presented a revised apparent polar wander (APW) path for Baltica following a rigorous synthesis of all Late Precambrlan-Perm lan data.

TL;DR: In this paper, the authors describe a synthesis characterized by broad scope, substantial support, and some speculation, and a framework for the synthesis is the speculative concept that the process of convergence and collision of large landmasses disrupts the fluid regime of the collision zone and adjoining areas.

TL;DR: For example, in regions of moderate to high heat flow (60-100 mW m−2) the seismogenic regime, representing the zone of unstable frictional sliding, typically extends to depths of 10-15 km, marking the onset of greenschist metamorphic conditions.

TL;DR: Giant quartz vein systems of all ages, from the Archean to Cenozoic, are characterised by similarities of geodynamic setting, local structure, paragenesis, metal budget, P-T-t paths, and chemical, fluid dynamic and isotopic properties that collectively imply a singular hydrothermal process as mentioned in this paper.

TL;DR: In this article, the best visibility is in the inner mountain west, while the poorest visibility is east of the Mississippi River and in the urban areas of California, with sulfates and organics being the largest constituents.

TL;DR: The most favourable geological mechanisms to focus fluid-flow seem to be the reactivation of inherited heterogeneiities such as lithological contacts, old faults and shear zones, close to a deep-crustal aquitard or a fertile layer as mentioned in this paper.

TL;DR: In this paper, the authors examined the discriminating ability of fourteen of the most commonly used tectonomagmatic geochemical discriminant diagrams and concluded that the reconstruction of paleotectonic settings should not be done by using geochemical data alone.

TL;DR: In this article, the authors describe electromagnetic techniques of use through the Earth's crust, including magnetovariation (MV) arrays, magnetotelluric (MT) sounding and DC resistivity sounding.

TL;DR: Several independent research groups have predicted future sea-level rise on the order of 15 to 50 cm by the middle of next century, and between 30 and 110 cm by 2100.

TL;DR: In this paper, the role of fluids in enhancing or destroying tectonic structures is studied and the relationship between the pore pressure of fluids and seismic velocities is investigated.

TL;DR: In the upper layers of the subducting slab metamorphic processes must generate fluidized beds which may be extruded along the subduction faults or intruded by hydraulic fracture mechanisms into the overlying cover rocks.

TL;DR: In this article, a model that interpreted a pronounced low-velocity zone at mid-crustal level as a layer enriched in fluids and influenced by retrograde metamorphism because of these fluids was proposed.

TL;DR: The role played by brines in expanding the unmixing solvus of the aqueous and carbonic components of common metamorphic fluids to cover a wide P-T range has been emphasized as mentioned in this paper.

TL;DR: In this article, the authors proposed a new model to explain the Kapuskasing Structural Zone (KSZ) and James Bay and found that these displacements and the rifting of James Bay were caused as a result of 160 km of left-lateral motion between East and West Superior Terranes with an accompanying 5° of anticlockwise rotation of the West Superior Terrane.

TL;DR: Granulite facies metamorphism spans at least 3.5 b.y.t. of Earth history and has been found to occur in tectonically active regions of thickened crust and elevated geotherm.