Synonyms Arc magmatism; Island arc; Magmatism; Subduction zone magmatism Definition Convergent margin magmatism – also called arc magmatism – occurs at straight or curved alignments (arcs) of discrete volcano-plutonic complexes that form above a subduction zone, where oceanic plate material (...
In order to better understand the role of post-collisional mafic magmatism at convergent plate boundaries in revealing the earth's evolution, this paper has systematically summarized the research history of post-collisional mafic magmatism, different types of collision and their influence on the nature...
Enlightened by active extension in mountain belts at convergent plate boundaries, increasing num- ber of studies in recent years have emphasized the role of gravitational collapse (Coney and Harms, 1984; Dilek and Moores, 1999; Harry et al., 1993; Jones et al., 1996; Livaccari, 1991; ...
Extraction of granite from the middle-lower crust, and its emplacement at shallower levels, is the principal mechanism by which continental crust has become differentiated1. A major setting for granite genesis is in accretionary orogens developed at plate boundaries through subduction processes as a ...
Extraction of granite from the middle-lower crust and its emplacement at shallower levels, is the principal mechanism by which continental crust has become differentiated1. A major setting for granite genesis is in accretionary orogens developed at plate boundaries through subduction processes as a ...
cover detachment implies that the underlying basement has been simultaneously dragged down into the convergent zone, a process for which the concept of ‘subductions profondes’ was already used by Debelmas and Gidon (1958). What was the basement of the detached cover sequences, and where is ...
The boundaries between hypabyssal and overlain extrusive layers are undistinguishable. At the northern part of the central segment, volcano-plutonic associations form NW–SE-oriented narrow bands, from Sam Nua (Laos), crossing Song Ma (along the Song Ma ophiolite belt) to Deo Ngang–Hoanh Son...
Magmatism and tectonic settings - Martin, Piwinskii - 1972 () Citation Context ...anism on Earth occurs either along midocean ridges and other rifts at divergent plate boundaries, or along magmatic arcs where eruptions are triggered by plate descent at convergent plate boundaries (=-=Martin and...
The southern part of Okushiri Island in the present-day back-arc margin of the NE Japan arc is one of the rare convergent plate boundaries where similar magma types (high-magnesian adakitic andesite (HMAA) and high-TiO2 basalt (HTB)) have been erupted concurrently at more than one time. ...
Subduction erosion occurs at all convergent plate boundaries, even if they are also accretionary margins. Frontal subduction erosion results from a combination of erosion and structural collapse of the forearc wedge into the trench, and basal subduction erosion by abrasion and hydrofracturing above the...