Wed, 19 Dec 2012 11:28:28 -0800
So, underneath mid-ocean ridges (and at hotspots like Hawaii), the mantle is upwelling, causing decompression melting to occur. Let's review: Under normal conditions, mantle rock like peridotite shouldn't melt in the Earth's upper mantle — it is just ...
Twin Falls Times-News
Tue, 22 Apr 2014 00:37:09 -0700
“If Basin and Range extension were to occur here, it could result in an eruption, because when the crust is stretched and pressure are released, decompression melting can occur.” Craters of the Moon encompasses more than 1,100 square miles, roughly the ...
Wed, 20 Mar 2013 11:12:59 -0700
In one scenario, the melt occurs and is retained beneath the crust as a result of the mantle upwelling and decompression melting that forms the newly emerging plate material. Another theory proposes that the melt is generated in small amounts ...
Wed, 15 Feb 2012 12:42:22 -0800
For example, volcanism at mid-ocean ridges can be explained by decompression melting associated with passive upwelling of hot (asthenospheric) mantle in response to plate divergence. Volcanism at subduction zones can be described by a combination of ...
Thu, 21 Jul 2011 04:28:09 -0700
Magma can then be generated by decompression melting as the asthenosphere ascends to fill in the space of the detached lithosphere. Although there is supporting evidence for lithospheric detachment form geophysical data, the process remains unproven.
Big Think (blog)
Mon, 11 Oct 2010 05:45:29 -0700
England and Katz models suggest that in the mantle wedge, there is a very restricted zone where this type of melting - decompression melting like we find at the midocean ridges - is allowed and it is this zone that dictates the location of the arc (see ...
Newswise (press release)
Wed, 27 Apr 2011 10:43:45 -0700
... asthenosphere is "hot and somewhat buoyant, and if there's a topographic gradient along the asthenosphere's upper surface, as there is under the Colorado Plateau, the asthenosphere will flow with it and undergo a small amount of decompression ...
Tue, 20 Apr 2010 23:01:25 -0700
“At the end of the last ice age, the rate of eruption in Iceland was some 30 times higher than historic rates. “This is because the reduction in the ice load reduced the pressure in the mantle, leading to decompression melting there. “Since the late ...
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