Application of induction coupled plasma mass spectrometry to the analysis of fluids extracted from Mississippi Valley-type deposits of the midcontinent, USA
The development of induction coupled plasma (ICP) mass spectrometry permits analysis for many cations in fluid inclusion extracts at lower detection limits than previously obtainable. Using ICP mass spectrometry, selected cations were analyzed in fluids extracted from galena, sphalerite, and hydrothermal dolomites from the Northern Arkansas, Tri-State, Central Missouri, and Viburnum Trend Mississippi Valley-type districts. Regionally, the composition of the extracted fluids are quite similar. However, in the Viburnum Trend, early octahedral galena is enriched in potassium and aluminum relative to late cubic galena. Potassium and aluminum values for late cubic galena are similar to the values for the other districts. Although carbonate hosted, the lead-rich Vibrunum Trend is unique among the districts studied in its proximity to a basal sandstone aquifer underlain by Precambrian felsic igneous rocks. The decrease in potassium and aluminum content through time suggest that early octahedral galena may have been deposited from a fluid channeled primarily through the basal Lamotte Sandstone aquifer. Late cubic galena was deposited from a fluid with less potassium and aluminum. Perhaps this fluid had more interaction with carbonate rocks owing to development of porosity; alternatively, a change in pH through time would also be consistent with these observations.
- Research Organization:
- Geological Survey, Denver, CO (USA)
- OSTI ID:
- 6169500
- Report Number(s):
- CONF-8510489-
- Journal Information:
- Geol. Soc. Am., Abstr. Programs; (United States), Journal Name: Geol. Soc. Am., Abstr. Programs; (United States) Vol. 17; ISSN GAAPB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
580400* -- Geochemistry-- (-1989)
ALKALINE EARTH METAL COMPOUNDS
ARKANSAS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMISTRY
DOLOMITE
FEDERAL REGION VI
FEDERAL REGION VII
GALENA
GEOCHEMISTRY
HYDROTHERMAL ALTERATION
INCLUSIONS
IONIC COMPOSITION
LEAD COMPOUNDS
LEAD ORES
LEAD SULFIDES
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MASS SPECTROSCOPY
MINERALS
MISSOURI
NORTH AMERICA
ORES
OXYGEN COMPOUNDS
PH VALUE
POROSITY
SPECTROSCOPY
SPHALERITE
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
USA
ZINC ORES