Picacho View Mine (Starlight Mine; Anderson pegmatites; Homestead claim; Homestead lode; Homestead Mine; Monster Mine; Buena Vista Mine), White Picacho District, Yavapai Co., Arizona, USA

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‡Ref.: Jahns, R.H. (1952), Pegmatite deposits of the White Picacho District, Maricopa and Yavapai Counties, Arizona, Arizona Bureau of Mines Bull. 162: 43 (Pl XII), 48, 50, 90-93, Plate I, Plate XX.

Dale, V.B. (1961), Tungsten Deposits of Gila, Yavapai, and Mohave Counties, Arizona, US Bureau of Mines Information Circular 8078.

USGS & Arizona Bureau of Mines, and U.S. Bureau of Reclamation (1969), Mineral and Water Resources of Arizona, Arizona Bureau of Mines Bull. 180 (USGS Bull.871): 110.

Phillips, K.A. (1987), Arizona Industrial Minerals, 2nd. Edition, Arizona Department of Mines & Minerals Mineral Report 4, 185 pp.

Peirce, H. Wesley (1990), Arizona Geological Survey Industrial Minerals card file.

Niemuth, N.J. (1987), Arizona Mineral Development 1984-1986, Arizona Department of Mines & Mineral Resources Directory 29, 46 pp.

Sawyer, M.B., Gurmendi, A.C., Daley, M.R., and Howell, S.B. (1992) Principal Deposits of Strategic and Critical Minerals in Arizona, U.S. Bureau of Mines Special Publication, 334 pp.

Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 298, 303.

USGS 7.5 minute Red Picacho quadrangle topo. map.

Arizona Department of Mineral Resources Midnight Owl file.

MRDS database Dep. ID #10137487; and, Dep. ID #10102521, MRDS ID #M003390; and Dep. ID #10162111, MAS ID #0040251836; and, Dep. ID #10096079, MRDS ID #TC38960; and Dep. ID #10162087, MAS ID #0040251141.

A former surface and underground Be-Nb-Ta-REE-Li-W-Feldspar-Mica mine with traces of Pb-Zn-Mo-Au, located in the E½ of the NW¼ sec. 10, T.7N., R.3W., about ¼ mile NE of Mitchell Wash. Discovered 1939. First produced 1942.

The main pegmatite body is a large, irregular mass that is essentially rectangular in plan. It is about 240 feet long, 140 feet in maximum outcrop breadth, and trends N.55ºE. Its NW side dips 35º to 55º SE, and much steeper southeastward dips along its opposite side suggest a marked downward thinning of the entire mass. The steep dip of the contact at the SW end of the main cut may reflect only a local roll; however, as the same contact dips 35º SE where exposed just beyond the cut, as well as in the nearby adit.

The country rock is thinly foliated quartz-mica schist and quartz-mica-amphiobole schist, with interlayered epidosite and chlorite-rich rocks that appear to include both pyroclastic and intrusive types. The foliation and layering trend ENE to E, and dip 30º or less in both northwesterly and southeasterly directions.

Many stringers, dikes, and large, irregular pods of pegmatite are scattered through the older rocks, and a curving pegmatite dike about 160 feet long and 30 to 40 feet wide forms a dsmall ridge SW of the main dike. The pegmatite-wallrock contacts are very sharp in most places, and locally show much evidence of shearing. Small-scale "feathering" of pegmatite into schist is common, and larger irregularities appear in a few places.

The main pegmatite comprises 5 well-defined zones. A discontinuous outer selvage, approximately 8 inches (20 cm) in maximum thickness, is a fine- to medium-grained aggregate of quartz, etc. There is also a wall zone, the outer intermediate zone, the inner intermediate zone, and the core (see Jahns 1952 for greater details).

Workings include a large main cut at 120 feet long and about 40 feet wide and 18 to 27 feet deep.

Mineral List

Albite 'Allanite' Arsenopyrite Beryl Biotite Cerussite Columbite Fluorite

Galena 'Garnet' Hemimorphite 'K Feldspar' Lepidolite Limonite Microcline Microlite Group

Molybdenite Molybdite Montebrasite Muscovite var: Sericite Pyrite Pyrochlore Group Quartz

Schorl Sphalerite Spodumene Tantalite 'Tourmaline' Wulfenite

30 entries listed. 21 valid minerals.