Latitude: 33°57'14"N
Longitude: 112°34'21"W
‡Ref.: Jahns, R.H. (1952), Pegmatite deposits of the White Picacho District, Maricopa and Yavapai Cos., AZ, AZ Bur. Mines Bull. 162: 39 (Plate IX), 80-83; Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 303; Peirce, H.W. (1990), AZ Geol. Sur. Industrial Minerals card file; Phillips, K.A. (1987), Arizona Industrial Minerals AZ Dept. of Mines and Mineral Resources Mineral Rpt. 4; USGS Red Picacho map; MRDS files #10048191 & 10258898.
A former Li-Ta-Nb-feldspar-mica mine. The North Morning Star mine is located about 600 feet N.10ºE. of the South prospects in the W.½ sec. 16, T.7N., R.3W., on the NW side of San Domingo Wash.
Mineralization is the North Morning Star pegmatite that dips irregularly, steeply and trends NNE to NE along the same prominent ridge.
The pegmatite body is about 50 feet in outcrop breadth (main cut area), and broadens NE-ward to a maximum of nearly 100 feet. Prominent branches extend eastward and NW-ward. The pegmatite is remarkably well-zoned (see Jahns (1952) for details).
The country rock is thinly foliated, light to medium gray quartz-biotite-muscovite schist. Its well-developed planar structure trends WNW and dips NNE at moderate to steep angles. The rock is cut by several dikes of fine-grained, dark gray amphibolite, and also contains numerous quartz veins. The pegmatite-wallrock contacts are sharp, and in places the outer part of the pegmatite body is complicated by tabular inclusions of elongate septa of schist.
Workings include the main cut, a large, trench-likeopening developed across a saddle betweeen 2 elongate knobs of massive quartz.
Mineral List
14 entries listed. 9 valid minerals.
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