Monument No. 2 Mine, Monument No. 2 channel, Yazzi Mesa, Monument Valley, Navajo Indian Reservation, Apache Co., Arizona, USA
|Latitude & Longitude (WGS84):||36° 56' 19'' North , 109° 53' 15'' West|
|Latitude & Longitude (decimal):||36.93870,-109.88764|
A former U-V occurrence/mine with minor Cu-Mo-Pb-Fe, located in the Monument No. 2 channel (paleochannel), about 1 mile West of Comb Ridge and SE of Yazzie Mesa on the east limb of the Monument upwarp, in en echelon strike and slip vertical faults along the channel. Discovered by Luke Yazzie, a Navajo, in 1942 and started during 1945. Reopened in 1948. Subsequently owned by the Vanadium Corp. of America.
Mineralization is the Monument No. 2 channel, one of the richest U-V deposits in the Monument Valley area. It is a short channel comprised of medium-grained, massive sandstone. The channel strikes N18W and is about 1¾ miles long. It ranges in width in its central part from 400 feet to 700 feet and has been cut into the underlying strata with a depth of about 50 feet.
There are 4 types of ore bodies: rods, tabular, corvusite-type and rolls. Rods are cylindrical bodies about 3 to 5 feet wide and 2 to 3 feet high and 15 to 20 feet long and are found only in the Shinarump member of the Chinle formation. The tabular ore bodies are blanket-like masses composed of channel sediments impregnated with yellow U-V minerals. These are 40 to 50 feet long and range in width from 20 to 30 feet and 3 to 5 feet thick. The corvusite-type ore bodies are irregularly shaped masses within which the rock is thoroughly penetrated by vanadium minerals. Rolls are similar bodies in the Morrison formation.
48 valid minerals. 1 (TL) - type locality of valid minerals.
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
|Kungurian - Moscovian|
272.3 - 315.2 Ma
|Permian to Pennsylvanian sedimentary rocks|
Age: Paleozoic (272.3 - 315.2 Ma)
Stratigraphic Name: Hermit Formation; Supai Group; Schnebly Hill Formation; Naco Group
Description: Interbedded sandstone, shale, and limestone usually characterized by ledgy outcrops. Orange to reddish sandstone forms cliffs near Sedona. This unit includes Supai Group and Hermit Shale in northern Arizona and Naco Group in southern Arizona. It was deposited in coastal-plain to shallow-marine settings during time of variable and changing sea level. Rocks of this map unit in southern Arizona may be in part equivalent to Permian rocks of map unit P in central and northern Arizona. (280-310 Ma)
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. 
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