T25 Structural and Stratigraphic Architecture of Gold Deposits and Mining Districts

Monday, 26 October 2020
1:30 PM - 5:30 PM
Meeting Rooms

LONE MOUNTAIN - A TERTIARY QUARTZ MONZONITE INRUSIVE WINDOW ON A BROAD WEST PLUNGING ANTIFORM

Paper number: T25-6
Program: Technical Sessions
Time: 2:35 PM – 2:50 PM

Authors

Abstract

The Lone Mountain property is located on the Independence- Jerritt Canyon Trend (>8 million oz. Au) and is northwest of Elko, Nevada. The location is consistent with the large wavelength folds seen in the Independence-Jerritt Districts. The structure is a broad west-plunging antiform with an east-west trending axis. The Tertiary quartz-monzonite stock intrudes into Ordovician/Devonian shelf carbonates which are referred to as the lower plate. There are also distal, off-shelf silicicalstic rocks that are referred to as the upper plate. Combined these elements form a half window bounded by a normal fault on the eastern side.

Ore was discovered and mined in the 1860s and in 1939 the area was acquired by the RipVan Winkle Consortium Mining Company. The intrusion produced multiple sets of hydrothermal veins, mineralized, and replacement faults. Subsequent geological mapping, soil, magnetic, gravity, geochemical and other surveys have served to further understanding of the area. Sampling indicates presence of gold, silver, antimony, copper, zinc, and lead. These deposits are widespread and seen in carlin, skarn-cordex, and sedex types of mineralization.

Geological Society of America Abstracts with Programs. Vol. 52, No. 6

doi: 10.1130/abs/2020AM-353916

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