Ore deposits of the Kokomo-Tenmile District, Colorado

Abstract

In pocket 2. Underground geologic maps of the Wilfley and Kimberly, Robinson, and Lucky Strike-Victory mines ____ In pocket 24 24 24 28 31

Mineral resource potential and geology of the White River National Forest and the Dillon Ranger District of the Arapaho National Forest, Colorado, with a section on salable commodities

“…22) with certainty level C (table 2). As described by Bergendahl and Koschmann (1971), garnet, epidote, chlorite, biotite, and sericite occur throughout this area as aggregates, replacement masses, disseminations, and fissure fillings in sedimentary rocks; calcite, wollastonite, and hornblende were also noted (Koschmann and Wells, 1946). Molybdenite, pyrite, chalcopyrite, magnetite, and specular hematite are disseminated in the alteration zone adjacent to small igneous bodies in limestones of the Maroon and Minturn Formations.…”

“…Veins are present and are of local economic interest, but replacement deposits are the major type of deposit in these two districts. Producing veins contain lead, silver, zinc, and gold and are found in the Maroon Formation, Laramide or younger intrusives, and Proterozoic metamorphic rocks (Bergendahl and Koschmann, 1971). This area has a high potential for small deposits of base and precious metals in veins (pi.…”

Mineral resource potential of National Forest RARE II and wilderness areas in Colorado

“…The Kokomo-Tenmile district, adjacent to and partly within the western part of the study area, produced gold, silver, lead, zinc, and copper from replacement deposits in the Late Paleozoic carbonates in the Kokomo-Tenmile district. Some molybdenum is also present (Bergendahl and Koschmann, 1971). …”

“…The area consists of Paleozoic sedimentary rocks intruded by Tertiary quartz monzonite, with minor outcrops of Precambrian gneisses in the northeastern corner of the study area (Bergendahl and Koschmann, 1971;Tweto and others, 1978). The eastern half of the study area is in the Kokomo-Tenmile district, which has produced significant amounts of silver, lead, zinc, copper, and gold from replacement deposits in limestone beds in the Pennsylvanian Minturn Formation (Bergendahl and Koschmann, 1971). South of the study area several miles is the Climax district where molybdenum has been produced from a stockwork porphyry deposit near Fremont Pass .…”

“…For this reason the eastern part of the study area is regarded as having a moderate potential for silver, lead, and zinc. Other energy and mineral resources are unknown and their potential is regarded as low (Bergendahl and Koschmann, 1971 …”