skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Experimental study of a F-, Cl-, and lithophile trace element-enriched vitrophyre from Spor Mountain, Utah

Abstract

The phase equilibria of a vitrophyre associated with topaz rhyolite from Spor Mountain, Utah has been determined experimentally. Temperatures ranged from 485/sup 0/C to 1000/sup 0/C and pressures from 0.5 to 5 kbar. Trace element and H/sub 2/O concentrations of glasses were determined by ion microprobe; partitioning of F, Cl, Li, Be, B, Rb, Sr, Zr, Y, Nb, Ba, Cs, Ce, Th and U between Cl- and F-bearing fluids consisting of H/sub 2/O and H/sub 2/O + CO/sub 2/ was determined. Cl partitions in favor of the fluid; for F-rich melts with less than or equal to 1600 ppm Cl D/sub Cl/ (Cl fluidCl melt) ranges from 2 to 10. D/sub Cl/ increases with increasing T, P, Cl in the melt and fluid, peraluminosity of the melt, H/sub 2/O in the fluid and with decreasing F in the melt. Water saturated, peraluminous granitic melts achieve a solubility limit for Cl in the melt with 2650 +- 200 ppm Cl at 800/sup 0/C and 2 kbar. F partitions in favor of the melt; D/sub F/ ranges from 0.19 to 0.35 and decreases with decreasing T and H/sub 2/O in the fluid. Lithium, Rb, Sr, Y, Nb, Cs and Ce partition inmore » favor of the fluid under water saturated conditions at 0.5 kbar and T greater than or equal to 900/sup 0/C; at 2 kbar Li, Rb, Y, Nb, Cs and Ce partition in favor of the fluid for T greater than or equal to 900/sup 0/C. At 4 kbar all lithophile elements studied partition in favor of the melt. D/sub i/ increases with increasing T and Cl in the system and with decreasing P and decreasing CO/sub 2/ in the fluid. Cl complexes predominantly with Li, Na, K, Rb, Cs, Fe and Ce in aqueous fluids. The enrichments in NaK, Li, Cs, Rb, Ce, Y and Nb in lavas at Spor Mountain may have resulted by transport of these elements in Cl-bearing, aqueous fluids through the F-rich magma« less

Authors:
Publication Date:
Research Org.:
Arizona State Univ., Tempe (USA)
OSTI Identifier:
5237231
Resource Type:
Thesis/Dissertation
Resource Relation:
Other Information: Thesis (Ph. D.)
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; GEOLOGIC DEPOSITS; GEOCHEMISTRY; GLASS; MULTI-ELEMENT ANALYSIS; UTAH; CERIUM; CESIUM; CHLORINE; ENRICHMENT; FLUORINE; ION MICROPROBE ANALYSIS; IRON; LAVA; LITHIUM; MOUNTAINS; NIOBIUM; POTASSIUM; PRESSURE DEPENDENCE; RUBIDIUM; SODIUM; SOLUBILITY; STRONTIUM; TEMPERATURE DEPENDENCE; YTTRIUM; ALKALI METALS; ALKALINE EARTH METALS; CHEMICAL ANALYSIS; CHEMISTRY; ELEMENTS; FEDERAL REGION VIII; HALOGENS; METALS; MICROANALYSIS; NONDESTRUCTIVE ANALYSIS; NONMETALS; NORTH AMERICA; RARE EARTHS; TRANSITION ELEMENTS; USA; 580400* - Geochemistry- (-1989)

Citation Formats

Webster, J D. Experimental study of a F-, Cl-, and lithophile trace element-enriched vitrophyre from Spor Mountain, Utah. United States: N. p., 1987. Web.
Webster, J D. Experimental study of a F-, Cl-, and lithophile trace element-enriched vitrophyre from Spor Mountain, Utah. United States.
Webster, J D. 1987. "Experimental study of a F-, Cl-, and lithophile trace element-enriched vitrophyre from Spor Mountain, Utah". United States.
@article{osti_5237231,
title = {Experimental study of a F-, Cl-, and lithophile trace element-enriched vitrophyre from Spor Mountain, Utah},
author = {Webster, J D},
abstractNote = {The phase equilibria of a vitrophyre associated with topaz rhyolite from Spor Mountain, Utah has been determined experimentally. Temperatures ranged from 485/sup 0/C to 1000/sup 0/C and pressures from 0.5 to 5 kbar. Trace element and H/sub 2/O concentrations of glasses were determined by ion microprobe; partitioning of F, Cl, Li, Be, B, Rb, Sr, Zr, Y, Nb, Ba, Cs, Ce, Th and U between Cl- and F-bearing fluids consisting of H/sub 2/O and H/sub 2/O + CO/sub 2/ was determined. Cl partitions in favor of the fluid; for F-rich melts with less than or equal to 1600 ppm Cl D/sub Cl/ (Cl fluidCl melt) ranges from 2 to 10. D/sub Cl/ increases with increasing T, P, Cl in the melt and fluid, peraluminosity of the melt, H/sub 2/O in the fluid and with decreasing F in the melt. Water saturated, peraluminous granitic melts achieve a solubility limit for Cl in the melt with 2650 +- 200 ppm Cl at 800/sup 0/C and 2 kbar. F partitions in favor of the melt; D/sub F/ ranges from 0.19 to 0.35 and decreases with decreasing T and H/sub 2/O in the fluid. Lithium, Rb, Sr, Y, Nb, Cs and Ce partition in favor of the fluid under water saturated conditions at 0.5 kbar and T greater than or equal to 900/sup 0/C; at 2 kbar Li, Rb, Y, Nb, Cs and Ce partition in favor of the fluid for T greater than or equal to 900/sup 0/C. At 4 kbar all lithophile elements studied partition in favor of the melt. D/sub i/ increases with increasing T and Cl in the system and with decreasing P and decreasing CO/sub 2/ in the fluid. Cl complexes predominantly with Li, Na, K, Rb, Cs, Fe and Ce in aqueous fluids. The enrichments in NaK, Li, Cs, Rb, Ce, Y and Nb in lavas at Spor Mountain may have resulted by transport of these elements in Cl-bearing, aqueous fluids through the F-rich magma},
doi = {},
url = {https://www.osti.gov/biblio/5237231}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1987},
month = {Thu Jan 01 00:00:00 EST 1987}
}

Thesis/Dissertation:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this thesis or dissertation.

Save / Share: