Illinois Group claims, Caballo Mountains Mining District, Sierra County, New Mexico, USAi

Regional Level Types
Illinois Group claims	Group of Claims
Caballo Mountains Mining District	Mining District
Sierra County	County
New Mexico	State
USA	Country

Structure: The Sierra Caballos Is Essentially An Eroded Fault Block Of Sedimentary And Igneous Rocks That Has Been Tilted Eastward. Minor Faulting And Folding Was Locally Intense. Most Of The North - Trending Faults Have Downthrown Sides On The East And The Strata Show Drag On That Side. See Comments

Tectonics: Basin And Range

Commodity: Oakland mine appears to have more calcite and barite than the other mines. Also several tons of galena were taken from an adit at the east end of the vein. A composite of samples containing 40% or more caf2 showed 53.89% caf2, 21.12% sio2, 18.38% caco3, and 6.50% baso4.

Deposit: Universal vein strikes N 70 w, dips steeply south, is about 180 m. In length and about 3 m. Wide. Oakland vein strikes N 65 w, dips nearly vertically, averages 3.5 m. Ide for a length of 105 m.. It consists of a set of fractures 1.5 to 7.5 m. Wide in the eastern half where displacement of 3 m. Was observed in the white sandstone, and 3 to 15 m. Wide in the western half of the vein. White star vein strikes N 80 w, is nearly vertical, cropsout for 400 m. In length and consists of a single fissure to numerous stringers in a sheeted zone up to 18 m. Wide. Economic ore can be traced continuously for 210 m..6 unpatented claims covering about 90 acres.

Geology: Above white s.s. Is brown and black shale and thin bedded argillaceous limestone.

Rock formation(s): Bliss S.S.-Dk. Red To Black Limy Fine-Gr., Thin-Med. Bedded S.S.;Dk. Brown Thick Bedded L.S., Qtz. Veinlets;Gray To Brown Med-Thick Bedded Dolomitic L.S.;White Coarse-Gr. Feldspathic S.S. And Pebble Cong


Ore(s): Fault Fissure Control - (See N 70)

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Link to USGS MRDS:	10110434

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References