نتایج جستجو برای: degassing
تعداد نتایج: 1408 فیلتر نتایج به سال:
A method for in-line continuous flow degassing to remove up 99.9% of oxygen from solvents is presented.
Liquid surface oceans are a seemingly unique feature of Earth. Long-term, global sea level depends on the balance water fluxes between Earth’s mantle and surface: degassing through volcanism regassing via subduction hydrous minerals. However, overall these at geological timescales remains uncertain. Geological observations suggest stability long-term thus near-steady-state regassing–degassing b...
[1] We explore physical mechanisms controlling formation of a confining conduit plug using 1D, steady-state numerical models of magma ascent. Model results for the welldocumented 1997 Vulcanian explosions at Soufrière Hills volcano were compared against subsurface conditions constrained by geophysical and petrologic analysis. We suggest that, if magma is permeable and overpressured and rock sur...
[1] The transfer of volatiles from the Earth’s interior to the atmosphere occurs through degassing of magma, the dynamics of which assert a significant control on volcanic eruptions. The first and most critical step in degassing is the nucleation of gas bubbles, which requires that a sufficient number of volatile molecules cluster together to overcome the free energy associated with the formati...
Introduction: Parameterized convection models have provided important results for the thermal history of the Earth and of other planets [1,2,3]. Schubert et al. [4] calculated a secular cooling of about 150°C-300°C since the Archaean and showed that a substantial portion of the present terrestrial heat flux is primordial with a Urey ratio of 0.65 to 0.85. For the first time Jackson and Pollack ...
Submarine volcanism represents ~80% of the volcanic activity on Earth and is an important source of mantle-derived gases. These gases are of basic importance for the comprehension of mantle characteristics in areas where subaerial volcanism is missing or strongly modified by the presence of crustal/atmospheric components. Though, the study of submarine volcanism remains a challenge due to their...
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