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Economic Geology GSW 2008 Users' Group Meeting
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Economic Geology; August 1968; v. 63; no. 5; p. 553-566
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Structural controls in the Red River District, New Mexico

K. F. Clark

Granitic stocks follow a mid-Tertiary, ENE-trending graben 2-4 miles wide, containing up to 3,000 feet of volcanics over Precambrian rocks. Hydrothermal alteration, particularly propylitic alteration, is widespread throughout the district, masking contact metamorphic effects. Molybdenite with pyrite occurs in disseminated and fissure-vein deposits (e.g., Questa mine) in a zone trending ENE along the graben. This zone is crossed by a NE-trending zone of younger pyrite-gold-chalcopyrite vein deposits and a NW-trending zone of still younger galena-sphalerite-silver vein deposits. The local trends can be related to major orogenic belts and lineaments of the Cordilleran region.

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