Compound and Elemental Analysis At Valley Of Ten Thousand Smokes Region Area (Kodosky & Keith, 1993)
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Exploration Activity: Compound and Elemental Analysis At Valley Of Ten Thousand Smokes Region Area (Kodosky & Keith, 1993)
|Exploration Activity Details|
|Location||Valley Of Ten Thousand Smokes Region Area|
|Exploration Technique||Compound and Elemental Analysis|
The purpose of this paper is to examine whether statistical analysis of encrustation chemistries, when supplemented with petrologic data, can identify the individual processes that generate and degrade fumarolic encrustations. Knowledge of these specific processes broadens the applications of fumarolic alteration studies. Geochemical data for a 47-element suite were obtained for an air-dried subset of the collected samples from Bondar-Clegg and Company Ltd. in Vancouver, B.C., Canada. The analytical techniques employed included instrumental neutron activation analysis (INAA), atomic absorption spectroscopy (AAS), direct-current plasma atomic emission spectroscopy (DCP) and gravimetry. Sample splits submitted under different code numbers were used to monitor analytical precision. For the reported analyses, precision was less than + 3% for the major elements and typically ~< 5% for the trace elements. Mineral identification was also undertaken for selected samples using standard X-ray powder diffraction (XRD) techniques at the University of Alaska Fairbanks. Since the VTTS fossil fumarolic encrustations usually occur as thin coatings on the ejecta, even in the best case scenario these samples represent mixtures of encrustation and ejecta. All geochemical and petrological data are available in Kodosky (1992).
- Lawrence G. Kodosky, Terry E. C. Keith (1993) Factors Controlling The Geochemical Evolution Of Fumarolic Encrustations, Valley Of Ten Thousand Smokes, Alaska