Passive margins and their subsidence

Article Abstract:

Subsidence on rifted inter-plume passive margins are isostatic responses to crustal and lithospheric stretching and thinning, lithospheric cooling and thickening and sediment loading. The hot underlying upper mantle and magma emplacement and cooling contribute to additional vertical movements at these plume margins. TheNorth Biscay starved margin is an example of syn-rift lithospheric stretching. Sediment loading characterizes the US Atlantic margin, while asymmetrical extensional tectonics are evinced by the Tucano-Gabon graben system.

Rifts (Geology), Subsidences (Earth movements), Land subsidences

---

Igneous emplacement in the transpressive shear zone: Ox Mountains igneous complex

Article Abstract:

Emplacement of granodiorite in the Ox Mountains, Ireland was syn-kinematic relative to the Ox Mountain shear zone. The pluton was emplaced via sheeting in a transient dilation area between the zone's flanks and its central region. Adamellites found in extensional cavities are characterized as single-body emplacements. The results suggest that magmatic emplacement in orogenic belts that are being deformed contractionally may be through a similar sheeting mechanism.

Analysis, Ireland, Natural history, Rocks, Igneous, Igneous rocks, Intrusions (Geology)

---

Granite magma generation, ascent and emplacement within a transpressional orogen

Article Abstract:

A model describing granite generation and movement is developed. Granites may be formed by crustal thickening during transpressive orogenesis. The process then causes local deformation which generates transcurrent movement. These results are based on studies done in the Cadomian belt of northwestern France. The area of study reveals Precambrian crustal formations within different orogen elements.

Granite

Similar abstracts:

• Abstracts: Discussion on the Oligocene Xanthi pluton, northen Greece: a granodiorite emplaced during regional extension. Variscan structure and its influence on post-Carboniferous basin development, Western Approaches Basin, SW UK Continental Shelf
• Abstracts: Patterns and consequences of interspecific competition in natural communities: a review of field experiments with plants
• Abstracts: Parasitism and the dynamics of ungulate grazing systems. Does food web complexity eliminate trophic-level dynamics?
• Abstracts: Simultaneous versus sequential settlement in territorial species. Sex-dependent habitat selection and genetic polymorphism
• Abstracts: Kinematic evolution of the lower plate during intracontinental subduction: an example from the Scandinavian Caledonides

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.