The following report, by Peter J. Wyllie, Department of Geochemistry and Mineral­ ogy, Pennsylvania State University, is based on a paper "presented by the author at the Second Western National Meeting of the American Geophysical Union, held at Stan­ ford University, December 1962. A similar, 'more-detailed version of this paper has been published in the Journal of Geophys­ ical Research, Augus...

Albite (NaAlSi3O8) is an aluminosilicate mineral. Its crystal structure consists of 3-D framework of Al and Si tetrahedral units. We have used Density Functional Theory to investigate the high-pressure behavior of the crystal structure and how it affects the elasticity of albite. Our results indicate elastic softening between 6-8 GPa. This is observed in all the individual elastic stiffness com...

Jinggangshan City, which is located in the southwestern part of Jiangxi Province, rich hot springs. However, lack geothermal studies has limited exploration and utilization resources this city. This study estimated terrestrial heat flow City through well logging analyses rock thermal conductivity production. Based on surrounding geoscience transect Crust 1.0 model, constructed a one-dimensional...

Ž . The deep structure of the Ontong–Java Plateau OJP in the westcentral Pacific is investigated through a 2-year deployment of four PASSCAL seismic stations used in a passive tomographic experiment. Single-path inversions of 230 Rayleigh waveforms from 140 earthquakes mainly located in the Solomon Trench confirm the presence of an extremely Ž . thick crust, with an average depth to the Mohorov...

A RECENT seismic refraction profile1 in 2,800 fm. (5.1 km.) at latitude 34° 00' N, longitude 66° 30' W, in the Atlantic Ocean proved that basement rocks having a velocity of 7.58 km/sec. for compressional waves were covered by 1.37 km. of sediment. We tentatively identified this velocity with either the P n velocities used in earthquake seismology for the ultra basic layer immediately beneath t...