Constraints on the Origin of Gold in the Meguma Zone, Ecum Secum area, Nova Scotia

Authors

  • M. N. Henderson Geological Survey of Canada, 601 Booth St., Ottawa, Ontario K1A 0E8
  • J. R. Henderson Geological Survey of Canada, 601 Booth St., Ottawa, Ontario K1A 0E8

DOI:

https://doi.org/10.4138/1594

Abstract

Gold occurs mainly in laminated bedding-parallel quartz veins in the Goldenvllle Formation metawacke-slate sequence. The bedding-parallel veins formed by hydraulic fracturing before the beds were folded. Subsequently, during development of the folds, en echelon quartz veins formed on the fold limbs, and perhaps in the latest stage of folding, saddle reef veins formed along fold hinges. All these vein types are locally auriferous, but gold was first deposited during formation of the bedding-parallel veins. Absence of any through-going system of "feeder" veins as well as the formation of hydraulic fractures indicate that the rocks were not permeable during vein formation, and the quartz and gold were derived locally from the host strata. RÉSUMÉ L'or présent dans la suite métawacke-schiste de la Formation Goldenvllle est localisé principalement dans des veines de quartz laminles et parallèls à la stratification. Ces veines parallèls ià stratification furent formées par fracture hydraulique avant le plissement des lits. Par la suite, pendant l'amplification des lits, des veines de quartz en échelon furent formées sur les flancs de plis et peut-être, pendant la phase finale de plisseaent, des veines en "gite de selle" se formèrent à la charnière de plis. Tous ces types de veines sont surifères par endroit mais l'apport initial de l'or date de la formation des veines parallèes à la stratification. L'absence de système de veines nourricières sinsi que la formation de fractures hydrauliques indiquent que les roches n'étalent pas perméables à l'époque de formation de veine et que le quartz et l'or sont de provenance locale. [Traduit par le journal]

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Published

1986-04-01

How to Cite

Henderson, M. N., & Henderson, J. R. (1986). Constraints on the Origin of Gold in the Meguma Zone, Ecum Secum area, Nova Scotia. Atlantic Geoscience, 22(1). https://doi.org/10.4138/1594

Issue

Vol. 22 No. 1 (1986)

Section

Articles

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