Distribution of selected elements in the shale of the Davis Formation, Buick mine area, viburnum trend, southeast Missouri ( USA).

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

Research output: Contribution to journalArticlepeer-review

Abstract

Data suggests that the shale of the Davis Formation may have acted as a sink and subsequently a source for Na, K, Mn, Fe, and Zn, as well as a sink for As. Episodic mineralization and leaching are believed to be responsible for the initial enrichment and subsequent removal of these elements in the Davis shale. Arsenic was probably precipitated and/or absorbed in a form that was more resistant to leaching. On the basis of the distribution of these selected elements, it is apparent that the alteration of the Davis shale in the area of the Buick mine was controlled by fracture permeability. Ore-forming and related solutions migrated along faults and fractures formed as a result of the collapse of the underlying dolomite. Thus, in the Buick mine area, the Davis Formation probably acted as a leaky aquitard during and after ore mineralization thereby allowing ore-forming and related solutions to migrate through, and probably along the top of, the Davis Formation. The enrichment zone at the base of the Davis shale, best delineated by Fe and Zn, is laterally extensive and could prove to be a useful guide to ore mineralization in this and other Mississippi Valley-type districts. Arsenic may be of use as an indicator of pathways taken by ore-forming and/or related solutions. -from Authors

Original languageEnglish (US)
Pages (from-to)140-152
Number of pages13
JournalEconomic Geology
Volume83
Issue number1
DOIs
StatePublished - 1988
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Geology
  • Geochemistry and Petrology
  • Economic Geology

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