نتایج جستجو برای: granitic layer
تعداد نتایج: 284442 فیلتر نتایج به سال:
A microbial community analysis using 16S rRNA gene sequencing was performed on borehole water and a granite rock core from Henderson Mine, a >1,000-meter-deep molybdenum mine near Empire, CO. Chemical analysis of borehole water at two separate depths (1,044 m and 1,004 m below the mine entrance) suggests that a sharp chemical gradient exists, likely from the mixing of two distinct subsurface fl...
Deep seismic sounding (DSS) data provides an excellent opportunity to accurately delineate the crustal structure of a given region owing fact that location and origin time source (Chemical explosion) are available. India Meteorological Department is carrying out such surveys since early 1970's. In this paper. wave velocities in upper part crust southern central West Bengal estimated from three ...
1376. [14] Michalski, J. R. et al. (2005), LPSC XXXVI, Abstract #1188. [15] Hamilton and Lucey (2005), LPSC XXXVI, Abstract #1272. [16] Christensen et al. (2000), JGR, 105, 9735-9739. [17] Reyes, D. P. (1994), M.S. Thesis, Arizona State University, Tempe, AZ. Figure 2: Variation of components between the weathered and cut surfaces of the granitic samples. Plagioclase feldspar and quartz values ...
SUMMA R Y. In the Dahomeyan of the western Accra Plains marie gneisses, amphibolites, and orthoamphibolite dykes in granitic gneiss occur. During the latest recrystallization, metamorphic conditions ranged (north to south) from oligoclase--epidote amphibolite subfacies through andesineepidote amphibolite subfacies to at least the medium or upper part of the amphibolite facies. Chemical analyses...
During Kand Si-metasomatism of deformed, relatively-mafic parent rocks to form more felsic, granitic rocks containing myrmekite, Ca, Mg, and Fe must leave the system as the modified rock is enriched in K, Na, and/or Si. When this kind of metasomatism occurs, the subtraction of Ca, Mg, and Fe would also be accompanied by losses of other metals present in the ferromagnesian silicates that were re...
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