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Title: Activity composition relationships in silicate melts

Equipment progress include furnace construction and electron microprobe installation. The following studies are underway: phase equilibria along basalt-rhyolite mixing line (olivine crystallization from natural silicic andensites, distribution of Fe and Mg between olivine and liquid, dist. of Ca and Na between plagioclase and liquid), enthalpy-composition relations in magmas (bulk heat capacity of alkali basalt), density model for magma ascent and contamination, thermobarometry in igneous systems (olivine/plagioclase phenocryst growth in Quat. basalt), high-pressure phase equilibria of alkali basalt, basalt-quartz mixing experiments, phase equilibria of East African basalts, and granitic minerals in mafic magma. (DLC)
Authors:
Publication Date:
OSTI Identifier:
7031820
Report Number(s):
DOE/ER/13414-T1
ON: DE93000931
DOE Contract Number:
FG05-85ER13414
Resource Type:
Technical Report
Research Org:
North Carolina Univ., Chapel Hill, NC (United States)
Sponsoring Org:
DOE; USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; SILICATE MINERALS; RESEARCH PROGRAMS; ANORTHOSITES; BASALT; CRYSTALLIZATION; DISTRIBUTION FUNCTIONS; ENTHALPY; HIGH PRESSURE; IRON; LIQUIDS; MAGMA; MAGNESIUM; MIXING; OLIVINE; PHASE STUDIES; PROGRESS REPORT; QUARTZ; SPECIFIC HEAT; VOLCANIC ROCKS; ALKALINE EARTH METALS; DOCUMENT TYPES; ELEMENTS; FLUIDS; FUNCTIONS; GABBROS; IGNEOUS ROCKS; METALS; MINERALS; OXIDE MINERALS; PHASE TRANSFORMATIONS; PHYSICAL PROPERTIES; PLUTONIC ROCKS; ROCKS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENTS 580000* -- Geosciences