Henry North Continuation

The Henry North Continuation is a phosphorus-phosphates mine located in Caribou county, Idaho at an elevation of 6,201 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Henry North Continuation

Commodity

Primary: Phosphorus-Phosphates
Tertiary: Uranium
Tertiary: REE
Tertiary: Fluorine-Fluorite
Tertiary: Vanadium

Location

State: Idaho
County: Caribou
District: Blackfoot River Reservoir Area

Land Status

Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Type: Patented
Type: State Lease
Type: Federal Lease

Workings

Type: Surface

Ownership

Owner Name: Monsanto Co.
Info Year: 1975

Owner Name: State Of Idaho
Info Year: 1975

Owner Name: U.S. Bureau Of Land Management
Info Year: 1975

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Bedded - Phosphate
Operation Type: Surface
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: M

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Form: TABULAR

Form: TABULAR

Form: IRREGULAR

Structure

Type: R
Structure: Slug Valley Fault

Type: R
Structure: Enoch Valley Fault

Type: R
Structure: Henry Fault

Type: R
Structure: Pelican Fault

Type: R
Structure: Wooley Valley Anticline

Type: R
Structure: Georgetown Syncline
Description: Georgetown Syncline, Wooley Valley Anticline, Pelican, Henry, Enoch Valley And Slug Valley Faults

Alterations

Not available

Rocks

Name: Limestone
Role: Associated
Age Type: Host Rock
Age Young: Late Permian

Analytical Data

Analytical Data: 119 SAMPLES OF STRATIGRAPHIC SECTION GAVE UP TO 36.0 % P2O5
Analytical Data: RANDOM SAMPLES RANGE 26.8 - 32.7 % P2O5

Materials

Gangue: Travertine

Comments

Comment (Deposit): 203.9 Ft Thickness Of Phosphatic Shale Member; 6560 Acre Area Held As Phosphate Land ( 1927 )

Comment (Workings): 1 Bulldozer Trench

Comment (Reserve-Resource): Elements Included In Rare Earth Analysis Are: Yitrium (500ppm), Lanthanum (250ppm), Neodmyium (150ppm), Gadolinium (60ppm) (Element Analysis From Phosphate Eis) Low Grade Resources Are Not Recognized By Monsanto. Nor Are They Apparent In The USGS Trenched Section Therefore Paramarginal Low Grade Resources Are Not Proposed. M1c2 Represents Minable Reserves At The N Henry (1/79). M2 Not Used. M1c1 M3c1 Not Used. M3c2 Medium Plus High Grade As Per Following: P.90-.75 No Entry. P.50 Resources To 250 Meters Downdip In. P.25 Resources Within Lease Boundary In Phosphoria. M3c2 Phosphorous Pentoxide Analysis Reduced 3 Percentage Points All Other Analysis Reduced Proportionately All Matrices-All Elements Assumed Proportional To P205

Comment (Reserve-Resource): Resources From Garrand Study Indicated Is 3.5:1,Inferred 9:1 Garrands Resource Subunits Which Correspond To The Henry Are Lanes Creek-Areas 1a Henry Ne Areas 2b-6b

Comment (Location): Located On U.S.Forest Service Lands. Closed - Mined Out.

Comment (Geology): Assumed Phosphorite Densities: High=2.3, Low=2:1

Comment (Deposit): Ore Control- Present Operations Require Near Surface Leach To Sufficiently Decrease Cao & Mgo For The Phosrock To Be Considered Ore

References

Reference (Deposit): Davidson, D. F., And Others, 1953 , Stratigraphic Sections Of The Phosphoria Formation In Idaho, 1949 , Part 2 : USGS Circ. 305 , 28 P.

Reference (Deposit): Powell, J. D., 1974 , Evaluation Of Phosphate Resources In Southeastern Idaho: Idaho Bureau Of Mines And Geology Inf. Circ. 25 , 33 P.

Reference (Deposit): Day, R. L., 1973, Trends In The Phosphate Industry Of Idaho And The Western Phosphate Field: Idaho Bureau Of Mines And Geology, Pamphlet 155, 63 P.

Reference (Deposit): Li, Ta M., 1978, Southeastern Idaho Phosphate Mining: How An Environmental Impact Statement Distorts Growth Plans: Mining Engineering, V. 30, No. 1, P. 25-28.

Reference (Deposit): Carter, Russell A., 1978, An Integrated Industry - Phosphate Mining And Milling In Idaho: Mining Engineering, V. 30, No. 1, P. 29-36.

Reference (Deposit): Rule, A. R., D. E. Kirby, And D. C. Dahlin, 1978, Recent Advances In Beneficiation Of Western Phosphates: Mining Engineering, V. 30, No. 1, P. 37-40.

Reference (Deposit): Service, A. L., And Petersen, N. S., 1967, An Evaluation Of The Western Phosphate Industry And Its Resources (In Five Parts) Trends And Outlook: U.S. Bureau Of Mines, Report Of Investigations 6935, 131 P.

Reference (Deposit): Thompson, M. E., 1953, Distribution Of Uranium In Rich Phosphate Beds Of The Phosphoria Formation: U.S. Geological Survey Bulletin 988-D, P. 45-65

Reference (Deposit): Service, A. L., 1966, An Evaluation Of The Western Phosphate Industry And Its Resources (In Five Parts), 3. Idaho: U.S. Bureau Of Mines, Report Of Investigations 6801, 201 P.

Reference (Deposit): Service, A. L. And Popoff, C. C., 1964, An Evaluation Of The Western Phosphate Industry And Its Resources (In Five Parts), 1. Introduction Review: U.S. Bureau Of Mines, Report Of Investigations 6485, 86 P.

Reference (Geology): Emigh, G. D., 1958, Petrography, Mineralogy And Origin Of Phosphate Pellets In The Phosphoria Formation: Idaho Bureau Of Mines And Geology, Pamphlet No. 114, 60 P.

Reference (Geology): Martin, G. W., 1958, Mineralogy Of Phosphate Oolites: Economic Geology, V. 53, No. 8, December, P. 1046-1048.

Reference (Reserve-Resource): Garrand, L. J., 1975, Phosphate Study Southeastern Idaho, For U.S. Department Of Agriculture, Caribou National Forest, U.S. Department Of Agriculture Contract No. 50-820: Garrand Corp.

Reference (Reserve-Resource): U.S Geological Survey, Bureau Of Land Management, And Forest Service, 1978, Final Environmental Impact Statement/ Development Of Phosphate Resources In Southeastern Idaho, Four Volumes.

Reference (Deposit): Thompson, M.E ., 1954, Further Studies Of The Distribution Of Uranium In Rich Phosphate Beds Of The Phosphoria Formation: U.S. Geological Survey Bulletin 1009-D, P. 107-122

Reference (Deposit): Mc Divitt, J. F., 1956, Economic Evaluation Of Phosphate And Other Minerals In Southern Idaho: Idaho Bureau Of Mines And Geology, Pamphlet No. 111, 48 P.

Reference (Deposit): Mansfield, G. R., 1927 , Geography, Geology, And Mineral Resources Of Part Of Southeastern Idaho: USGS Prof. Paper 152 , 453 P.

Idaho Gold

"Where to Find Gold in Idaho" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Idaho. Read more: Where to Find Gold in Idaho.