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Adjust Mine (Adjust group; Mellor claims; Little Treasure Mine; Blue Bird vein; Silver Cross claims; Laurence Mine; Old Odell), Lee Mountain area, Saddle Mountain District, Dripping Spring Mts, Pinal Co., Arizona, USA

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Latitude & Longitude (WGS84): 33° 2' 9'' North , 110° 41' 30'' West
Latitude & Longitude (decimal): 33.0358333333, -110.691666667
Other regions containing this locality:Sonoran Desert, North America

A former underground Pb-Ag-Cu-Au-Zn mine located on 13 unpatented claims, in the S½ (center SE¼SE¼) sec. 34, T4S, R16E (Christmas 7.5 minute topo map), 1.4 miles SW of Lee Mountain. Claims extend into secs. 35 & 36, and into secs. 1-4 and 9, T5S, R16E. Discovered by N.H. Mellor of Winkelman, AZ. The Adjust Mining Co. produced 1920-1939. Additional names which apply to this property: Gold Gulch Mine; Big Treasure Mine; Hope Metals Mine; and Patented claims MS 2179, 2180, 2182.

Mineralization is a vein deposit with a tabular ore body hosted in andesite. The ore zone is 457.2 meters long and 3.66 meters wide, strikes N76E and dips vertically. Ore control was NE-trending veins. Alteration is vein minerals replacing andesite. Local structures include NE-trending quartz-mica diorite dikes. The Blue Bird vein is completely oxidized from the surface to about 50 feet in depth. The average width is 4 feet. An associated rock unit is diorite. Related in style and age of mineralization to the Christmas Mine, 3 miles NW in Gila County.

Workings are the principal developments on the Blue Bird veins. Exploration by ASARCO on this property in 1967.

Mineral List

12 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Ypresian - Campanian
47.8 - 83.6 Ma
Early Tertiary to Late Cretaceous volcanic rocks

Age: Phanerozoic (47.8 - 83.6 Ma)

Stratigraphic Name: Williamson Canyon Volcanics

Description: Rhyolite to andesite and closely associated sedimentary and near-surface intrusive rocks; commonly dark gray to dark greenish gray or greenish brown. In the ranges west of Tucson, this unit includes thick welded ash-flow tuffs. Volcanic rocks of this unit are inferred to be derived from vents and volcanoes above magma chambers that solidified to form the granitic rocks of map unit TKg. These rocks are restricted to southeastern Arizona except for a small outcrop near Bagdad. (50-82 Ma)

Comments: Related, broadly, to unit TKg

Lithology: Major:{rhyolite,dacite,andesite}, Minor:{clastic}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Ross, Clyde P. (1925b) Ore Deposits of the Saddle Mountain and Banner Mining Districts, Arizona, USGS Bull. 771: 41-43.

Galbaith, F.W. (1947), Minerals of Arizona, Arizona Bureau of Mines Bull. 153: 9, 15, 17, 18, 19, 26.

US Atomic Energy Commission Preliminary Reconnaissance Report 172-488 (1953): 34.

Creasey, S.C. and Kistler, R.W. (1962), USGS Professional Paper 450-D: D1-D5.

Willden (1964), USGS Bulletin 1161-E.

Niemuth, N.J. & K.A. Phillips (1992), Copper Oxide Resources, Arizona Department of Mines & Mineral Resources Open File Report 92-10: 13 (Table 1).

Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 100, 229, 340, 372, 373, 378.

USGS Chrismas Quadrangle map.

Arizona Department of Mineral Resources Adjust group file.

Arizona Department of Mineral Resources Little Treasure file.

Arizona Department of Mineral Resources U file.

U.S. Bureau of Mines file data - cluster 684.

U.S. Bureau of Land Management Mining District Sheet #701.

U.S. Bureau of Mines - Arizona Bureau of Geology and Mining Technology production file data.

MRDS database Dep. ID #10048325, MRDS ID #M899902; and Dep. ID #10102405, MRDS ID #M000641; and Dep. ID #10210635, MAS ID #0040210095; and Dep. ID #10283472, MAS ID #0040210622.

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