Magma Generating Processes
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Title
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Magma Generating Processes
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Description
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Under normal circumstances, the geothermal gradient (figure 1) does not allow for any amount of melting to occur. At a convergent margin, dewatering of the subducting oceanic slab decreases the melting temperature of the surrounding asthenosphere significantly enough to allow for partial melting of the asthenosphere. This process initiates when the slab approaches a depth of approximately 150 to 200 km.
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Subject
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Bismarck Arc to New Britain Arc
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Creator
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Robert Ashton
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Date
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May 5th, 2015
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Rights Holder
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Lafayette College Department of Geology & Environmental Geosciences
