Determination of radiogenic isotopes (Rb/Sr, Sm/Nd and Pb/Pb) in fluid inclusion waters: An example from the Bluebell Pb-Zn deposit, British Columbia, Canada

Conference · Sun May 01 04:00:00 EDT 1988 · Geochimica et Cosmochimica Acta; (USA)

OSTI ID:5269424

Changkakoti, A; Gray, J; Krstic, D; Cumming, G L; Morton, R D ^[1]

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1. Univ. of Alberta, Edmonton (Canada)

Rb, Sr, Pb, Nd and Sm isotopes were determined in fluid inclusion waters extracted from quartz samples of the Bluebell Pb-Zn deposit, British Columbia. The results demonstrate that radiogenic isotopes in fluid inclusion waters can constitute useful geochronological and genetic tools when applied in conjunction with geological, geochemical and other geochronological studies. Rb/Sr isotopes of fluid inclusion waters and of mineralized marbles hosting the deposit indicate a Tertiary mineralization age of 19.2 {plus minus} 5.9 Ma, and an initial {sup 87}Sr/{sup 86}Sr ratio of 0.7143. This Rb/Sr data is in general agreement with a Cenozoic age suggested by geologic field relations described by Irvine (1957) and Fyles (1967). Pb isotope data suggest two isotopically distinct fluids, one less radiogenic and similar to values measured on galenas, and the other more radiogenic. This is in agreement with Ohmoto and Rye's (1970) hypothesis of two-meteoric-hydrothermal fluids, and LeCouteur's (1973) convection cell model. Nd and Sm isotope also suggest mixing of fluids. Both Pb/Pb and Nd/Sm data suggest very old lower and upper crustal materials as possible source of the metals.

• OSTI ID: 5269424
• Report Number(s): CONF-8701162--
• Conference Information: Journal Name: Geochimica et Cosmochimica Acta; (USA) Journal Volume: 52:5
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
152004* -- Geothermal Data & Theory-- Isotope & Trace Element Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400202 -- Isotope Effects
Isotope Exchange
& Isotope Separation
58 GEOSCIENCES
580000 -- Geosciences
AGE ESTIMATION
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
BRITISH COLUMBIA
CANADA
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMISTRY
ENERGY SYSTEMS
FLUIDS
GEOCHEMISTRY
GEOLOGIC HISTORY
GEOTHERMAL FLUIDS
GEOTHERMAL SYSTEMS
HYDROTHERMAL SYNTHESIS
HYDROTHERMAL SYSTEMS
INCLUSIONS
ISOTOPE DATING
ISOTOPE RATIO
ISOTOPES
LEAD ISOTOPES
LEAD ORES
MINERALIZATION
MINERALS
NEODYMIUM ISOTOPES
NORTH AMERICA
ORES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PETROGENESIS
QUARTZ
RARE EARTH ISOTOPES
ROCK-FLUID INTERACTIONS
RUBIDIUM ISOTOPES
SAMARIUM ISOTOPES
SILICON COMPOUNDS
SILICON OXIDES
STRONTIUM ISOTOPES
SYNTHESIS
ZINC ORES