Samples belong to (i) the present-day activity as represented by shoshonitic (SHO) basalts, i.e., pumices with low porphyritic (LP) content and high porphyritic (HP) scoriae; (ii) the subalkaline versus alkaline products erupted at Stromboli during its subaerial history among the extreme...
magma chamberscarbon dioxideThe 3-D P-wave velocity and P- to S-wave velocity ratio structure of the Yellowstone volcanic field, Wyoming, has been determined from local earthquake tomography using new data from the permanent Yellowstone seismic network. We selected 3374 local earthquakes between ...
13.a colorless element that is one of the six inert gasses; occurs in trace amounts in air.无色元素,六种惰性气体之一,空气中含量较少。 14.column content of ozone大气气柱中的臭氧含量 15.The magma within the earth may be heavily charged with gases and steam.地球内的岩浆可能含有大量的气体...
Here we present a model that allows the inferred volume change of the reservoir and the sulfur mass loading to be predicted as a function of reservoir depth and the magma’s oxidation state and volatile content, which is consistent with the array of natural data....
Currently, helium used in industry mainly comes from natural gas, which is produced by the radioactive decay of uranium (U) and thorium (Th) in rocks. The content of U and Th in rocks is low, and their half-lives are extremely long, resulting in a very slow rate of helium production...
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With the first investigations we can demonstrate that gas release#13; curves of volcanic rocks are qualified for a) detection of the primary gas content of erupted magma; b) detection of#13; alteration processes of the igneous glass; c) detection of contamination of the magma with adjacent ...
As the content of clay mineral or organic matter increases, the horizontal principal stress difference decreases, indicating that the in-situ stress evaluation result by the new method is in better accordance with the distribution law of true in-situ stress. © 2020, Natural Gas Industry Journal...
The rest of the vaporous sulfur was injected into the stratosphere, presumably as SO 2. The exceptionally high sulfur content of the El Chich贸n magma, estimated at about 2.6 wt.% SO 3, resulted in a large stratospheric cloud of sulfuric acid aerosols which may have an impact on the ...
The relation between the carbon dioxide content and its stable carbon isotopic composition (-21.30 to -11.80 ‰ and from -11.20 to -9.40 ‰ in BK-5 and BK-7 wells, respectively) may suggest the origin of carbon dioxide from volcanic degassing from the Deccan Trap basaltic magma as well as...