Alteration of shale of the David Formation overlying a Pb-Zn deposit of the Viburnum trend, S. E. Missouri

Conference · Tue Jan 01 04:00:00 EST 1985 · Geol. Soc. Am., Abstr. Programs; (United States)

OSTI ID:6194333

Panno, S V; Sayre, E V; Harbottle, G

Ninety-five drill core samples of shale from the Davis Formation were collected from above and laterally away from the Pb-Zn deposit of the Buick mine, and examined for hydrothermal alteration. Thirty-seven samples were collected from the core of a single borehole that penetrated the entire thickness of the formation immediately above the deposit; fifty-four samples were collected at the base of the formation from boreholes that laterally traverse the ore deposit and extend up to four miles from the deposit. Each core sample was analyzed by neutron activation for twenty-six elements. Immediately above the deposit there is an apparent enrichment of K and As and an apparent depletion of Na, Mn, Fe, and Zn. K is enriched through the entire thickness of the shale above the deposit; As is enriched only at the top and base of the Davis Formation. Concentrations of Na, Mn, Fe, and Zn reveal a zone of depletion approximately 17m thick at the upper contact. The areal distribution of these elements and K and As supports the enrichment/depletion interpretation. These data suggest that ore and ore-related solutions migrated along the dolomite-shale interfaces at both the upper and lower contacts of the Davis Formation and leached Na, Mn, Fe, and Zn from the shale.

• Research Organization: Brookhaven National Laboratory, Upton, NY (USA)
• OSTI ID: 6194333
• Report Number(s): CONF-8510489-
• Conference Information: Journal Name: Geol. Soc. Am., Abstr. Programs; (United States) Journal Volume: 17
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580300 -- Mineralogy
Petrology
& Rock Mechanics-- (-1989)
580400* -- Geochemistry-- (-1989)
BOREHOLES
CAVITIES
CHEMICAL COMPOSITION
CHEMISTRY
DISSOLUTION
DRILL CORES
FEDERAL REGION VII
GEOCHEMISTRY
GEOLOGIC FORMATIONS
GEOLOGIC HISTORY
GEOLOGY
HYDROTHERMAL ALTERATION
LEACHING
LEAD ORES
MINERALIZATION
MISSOURI
NORTH AMERICA
ORES
PETROLOGY
ROCK-FLUID INTERACTIONS
SEPARATION PROCESSES
USA
ZINC ORES