Split Rock deposit (Gentry Rock Creek), Chediski Farms (Marley Ranch), Apache Iron Mining District, Navajo Co., Arizona, USAi
|Regional Level Types|
|Split Rock deposit (Gentry Rock Creek)||Deposit|
|Chediski Farms (Marley Ranch)||- not defined -|
|Apache Iron Mining District||- not defined -|
A Fe deposit located in the center sec. 27, T8N, R15E, G&SRM, 9.3 km (5.8 miles) SSW of Chediski Farms (Marley Ranch), and 3.1 miles NW of Oak Creek Ranch.
Mineralization is a sedimentary iron deposit (Mineral occurrence model information: Model code: 241; USGS model code: 34a; BC deposit profile: F10; Deposit model name: Superior Fe [BC name is Lake Superior & Rapitan types iron-formation]), of hematite ore that occurs in irregular masses hosted in chert of the silicified Mescal Limestone, shale and sandstone, and is overlain by Chediski Sandstone. The ore body is 9.14 meters thick. Associated rocks include Neoproterozoic massive sills of diabase. Local rocks include Middle Proterozoic sedimentary rocks.
Regions containing this locality
|North America Plate||Tectonic Plate|
|Fort Apache Indian Reservation, Arizona, USA||Reservation|
Select Mineral List TypeStandard Detailed Strunz Dana Chemical Elements
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
2 valid minerals.
Rock Types Recorded
Select Rock List TypeAlphabetical List Tree Diagram
Detailed Mineral List:
| ⓘ Hematite|
Reference: Moore, Richard T. (1968), Mineral Deposits of the Fort Apache Indian Reservation, Arizona, AZ Bur. of Mines Bull. 177: 34.
| ⓘ Magnetite|
Reference: Moore, Richard T. (1968), Mineral Deposits of the Fort Apache Indian Reservation, Arizona, AZ Bur. of Mines Bull. 177: 29, 34.
List of minerals arranged by Strunz 10th Edition classification
|Group 4 - Oxides and Hydroxides|
List of minerals arranged by Dana 8th Edition classification
|Group 4 - SIMPLE OXIDES|
|Group 7 - MULTIPLE OXIDES|
List of minerals for each chemical element
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
|Cryogenian - Ectasian|
635 - 1400 Ma
|Middle Proterozoic sedimentary rocks|
Age: Proterozoic (635 - 1400 Ma)
Stratigraphic Name: Grand Canyon Supergroup; Chuar Group; Unkar Group; Apache Group; Troy Quartzite
Description: Red-brown shale and sandstone, buff to orange quartzite, limestone, basalt, black shale, and sparse conglomerate. This unit includes the Grand Canyon Supergroup, Apache Group, and Troy Quartzite. These rocks were deposited in shallow marine, coastal nonmarine, and fluvial settings. (700-1300)
Comments: Original map source: Arizona Geological Survey, DI-8 Geologic Map of Arizona, Digital Spatial data for the Geologic Map of Arizona, v. 3.0, edited by S.M. Richard and S.M. Kneale, 2002, 10 p., 2 DOS HD disks. Arc/INFO export file (.e00) format, scale 1:1,000,000.
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. 
1000 - 1600 Ma
|Mesoproterozoic sedimentary rocks|
Age: Mesoproterozoic (1000 - 1600 Ma)
Lithology: Sedimentary rocks
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529.