Tectono-metallogenic maps of mining districts in the Lincoln County porhyry belt New Mexico
Lee A. Woodward
Tectono-metallogenic maps of the Nogal-Bonito, White Oaks, Jicarilla, Schelerville (West Bonito), Capitan Mountains, and Tecolote mining districts show structures, rock units, and mineral deposits in such a way that inferences can be made about controls of mineralization and exploration targets can be defined. Principal structural elements include faults, fracture or shear zones, breccia zones, and folds. Rock units shown on the maps emphasize favorable hosts for mineralization. Lithologic factors influencing the potential to host mineral deposits include mechanical behavior (i.e., brittle or ductile) and chemical favorability for replacement or metasomatism. Intrusive igneous rocks are shown as felsic, intermediate, or mafic, and in some cases alkalic; the composition appears to be a major factor in the genesis of many associated minerals deposits. Mineral occurrences show metals and the type of deposit (e.g., vein, contact metasomatic, disseminated, shear zonehosted, breccia-hosted, stockwork, or placer). The Lincoln County porphyry belt is part of an early to mid- Tertiary alkalic igneous province extending from west Texas to central-northern Montana. This province is characterized by silica-undersaturated to silica-saturated rocks with associated metallic mineralization, especially gold. Total gold production from the Lincoln County belt is at least 186,000 oz.
- Woodward, Lee A., 1991, Tectono-metallogenic maps of mining districts in the Lincoln County porhyry belt New Mexico, in: Geology of the Sierra Blanca, Sacramento and Capitan Ranges, New Mexico, Barker, James M.; Kues, Barry S.; Austin, George S.; Lucas, Spencer, G., New Mexico Geological Society, Guidebook, 42nd Field Conference, pp. 283-290.