Physics
Scientific paper
Sep 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29r..22c&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 18, pp. 22-1, CiteID 1875, DOI 10.1029/2001GL014429
Physics
24
Mineralogy, Petrology, And Mineral Physics: Experimental Mineralogy And Petrology, And Mineral Physics: Minor And Trace Element Composition, Mineral Physics: High-Pressure Behavior, Mineral Physics: Physical Thermodynamics, Geochemistry: Composition Of The Mantle
Scientific paper
The phase boundary between San Carlos olivine and its high pressure phase, wadsleyite, have been studied comparatively in dry and water saturated condition. By comparing saturated and dry samples from the same experimental run, we determine that both boundaries of the two-phase coexisting loop shift towards lower pressure or lower iron content, and the pressure width of the loop decreases to 0.3 GPa under saturated conditions at 1473 K. Thus, the presence of water in the Earth's mantle will sharpen the 410-kilometer seismic discontinuity, shallow the depth of the discontinuity, and reduce the velocity jump across the discontinuity.
Chen Jiuhua
Inoue Toru
Weidner Donald J.
Yurimoto Hisayoshi
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