Grade and tonnage model of Minor Podiform Chromite

GRADE AND TONNAGE MODEL OF MINOR PODIFORM CHROMITE

By Donald A. Singer and Norman J Page

DATA REFERENCES Singer and others (1980); Calkins and others (1978); Carlson and others (1985).

COMMENTS All deposits in this grade-tonnage compilation are from California and Oregon. The two largest tonnage deposits are actually districts rather than individual deposits. The majority of the grades represent shipping grades. Grades less than 35 percent typically represent in-place "ore". The mixture of shipping grades and in-place grades may explain the significant negative correlation (r = -0.25) between grade and tonnage. Rh, Ir, Ru, Pd, and Pt grades are based on reported analyses of samples from the deposits. Unreported PGE grades are probably similar to those presented here. Rhodium is correlated with chromite (r = 0.35, n = 69), platinum (r= 0.69, n = 31), iridium (r = 0.47, n = 35), ruthenium (r = 0.56, n = 28). Ruthenium is correlated with palladium (r = 0.72, n = 21) and iridium (r = 0.59, n = 29). See figs. 21-23.

Figure 21. Tonnages of podiform chromite deposits from California and Oregon, USA. Individual digits represent number of deposits. [Because of limitations on the reproduction of the original figure, these numbers cannot be distinguished in the figure.]

Figure 22. Chromite grades of podiform chromite deposits from California and Oregon, USA. Individual digits represent number of deposits. [Because of limitations on the reproduction of the original figure, these numbers cannot be distinguished in the figure.]

fig 22

Figure 23. PGE grades of podiform chromite deposits from California and Oregon, USA. A, Rhodium. B, Iridium. C, Ruthenium. D, Palladium. E, Platinum. Individual digits represent number of deposits. [Because of limitations on the reproduction of the original figure, these numbers cannot be distinguished in the figure.]

fig 23

DEPOSITS

Name Country

Ace of Spades USCA

Adobe Canyon Gp. USCA

Ajax USOR

Alice Mine USCA

Allan (Johnson) USCA

Alta Hill USCA

Althouse USOR

Alyce and Blue Jay USCA

American Asbestos USCA

Anti Axis USCA

Apex (Del Norte Co.) USCA

Apex (El Dorado Co.) USCA

Applegate USOR

Associated Chromite USOR

Babcock USOR

Babyfoot USOR

Beat USCA

Big Bear USOR

Big Bend USCA

Big Chief USOR

Big Dipper (Robr) USCA

Big Four USOR

Big Pine Claim USCA

Big Yank No. 1 USOR

Binder No. 1 USCA

Black Bart (Great Western) USCA

Black Bart Claim (Avery) USCA

Black Bart Group USCA

Black Bear USCA

Black Beauty USOR

Black Boy USOR

Black Chrome USCA

Black Diamond USOR

Black Diamond (Grey Eagle Gp.) USCA

Black Hawk USOR

Black Otter USOR

Black Rock Chrome USCA

Black Streak USOR

Black Warrior USOR

Blue Brush USCA

Blue Creek Tunnel USCA

Blue Sky (Lucky Strike) USCA

Boiler Pit USCA

Bonanza USCA

Booker Lease USCA

Bowden Prospect USCA

Bowie Estate USCA

Bowser USOR

Bragdor USCA

Briggs Creek USOR

Brown Scratch USOR

Bunker USCA

Burned Cabin USOR

Butler Claims USCA

Butler, Estate Chrome, etc USCA

Buttercup Chrome USCA

Camden Mine USCA

Campbell USOR

Camptonville area USCA

Castro Mine USCA

Cattle Springs USCA

Cavyell Horse C USOR

Cavyell Horse Mountain USOR

Cedar Creek USOR

Celebration USOR

Challange area USCA

Chambers USOR

Chicago USCA

Christian Place USCA

Chrome Camp USCA

Chrome Gulch USCA

Chrome Hill USCA

Chrome King (Josephine Co.) USOR

Chrome King (Jackson Co.) USOR

Chrome No. 3 USOR

Chrome Ridge USOR

Clara H USCA

Clary and Langford USCA

Cleopatra USOR

Clover Leaf USCA

Codd Prospect USCA

Coggins USCA

Collard Mine USOR

Commander USCA

Coon Mt. Nos. 1-3 USCA

Copper Creek (Low Divide) USCA

Courtwright USCA

Courtwright (Daggett) USCA

Cow Creek Gp. USCA

Crouch USOR

Crown USOR

Cyclone Gap USCA

Cynthia USOR

Daisy (Aldelabron) USCA

Dark Star USOR

Darrington USCA

Deep Gorge Chrome USOR

Delare Prospect USOR

Detert USCA

Diamond USCA

Dickerson USCA

Dickey and Drisbach USCA

Dirty Face USOR

Doe Flat USCA

Don Pedro USCA

Dorriss USCA

Dozier USCA

Dry Creek USOR

Earl Smith USCA

Early Sunrise USOR

Edeline USCA

Eden USCA

Eggling and Williams USCA

El Primero USCA

Elder Claim USCA

Elder Creek USCA

Elder Creek Gp. USCA

Elk Creek Claim USCA

Elkhorn Chromite USOR

Ellingwood USCA

Ellis USCA

Esterly Chrome USOR

Esther and Phyllis USCA

Fairview USCA

Fiddler's Green USCA

Fields and Stoker USCA

Finan USCA

Forest Queen USCA

Foster USOR

Four Point USOR

Fourth of July USCA

French Hill USCA

Friday USOR

Gallagher USOR

Gardner Mine USOR

Gas Canyon USCA

Geach USCA

Gibsonville USCA

Gill (Gill Ranch) USCA

Gillan USCA

Gillis Prospect USCA

Glory Ho USOR

Golconda Fraction USCA

Gold Bug Claim USCA

Goncolda USOR

Gray Boy USOR

Gray Buck Gp. USOR

Green (Americus) USCA

Green Mine USCA

Green Ridge USCA

Green's Capco Leases USCA

Griffin Chromite USOR

Gunn Claims USCA

Half Chrome USCA

Hanscum USOR

Happy Go Lucky USCA

Harp and Sons Ranch USCA

Hawks Rest View USOR

Hayden and Hilt USCA

Helemar USCA

Hendricks No. 2 USCA

High Dome USCA

High Plateau USCA

Hill-Top Chrome USCA

Hodge Ranch USCA

Hoff USCA

Holbrook and McGuire USCA

Holseman (and others) USCA

Holston (Vaughn) USCA

Horseshoe USCA

Horseshoe Chrome USOR

Houser & Burges USOR

Hudson (Fuller Claims) USCA

I-Wonder USCA

Illinois River USOR

Independence USOR

Irene Chromite USOR

Iron King USOR

Iron Mountain USOR

Jack Forth USCA

Jack Sprat Gp. USCA

Jackson USOR

Jim Bus USOR

Johns USOR

Josephine USCA

Josephine No. 4 USOR

Judy (Hicks) USCA

Julian USCA

Kangaroo Court Mine USCA

Kingsley USOR

Kleinsorge Gp. USCA

Kremmel and Froelich USCA

Lacey USCA

Lambert USCA

Langley Chrome USOR

Lassic Peak USCA

Last Buck USOR

Last Chance (Coos) USOR

Last Chance (Josephine) USOR

Laton USCA

Letty USCA

Liberty USCA

Liberty Bond Claim USCA

Linda Marie USOR

Little Boy USOR

Little Castle Creek USCA

Little Hope USCA

Little Rock Mine USCA

Little Siberia USOR

Lone Gravel USCA

Long Ledge Gp. USCA

Lost Lee USOR

Lotty USCA

Lucky Boy USCA

Lucky Friday USOR

Lucky Girl USCA

Lucky Hunch USOR

Lucky L. & R. USOR

Lucky Nine Gp. USOR

Lucky Star USOR

Lucky Strike (Lake Co.) USCA

Lucky Strike (S.L.O. Co.) USCA

Lucky Strike (Curry Co.) USOR

Lucky Strike USOR

Mackay USCA

Madeira USCA

Madrid USCA

Manchester USCA

Maralls Capro Leases USCA

Marks & Tompson USOR

Mary Jane USCA

Mary Walker USOR

Maxwell USCA

Mayflower USCA

McCaleb's Sourdough USOR

McCarty USCA

McCormick USCA

McGuffy Creek Gp. USCA

McMurty USCA

Meeker (Sonoma Chrome) USCA

Merrifield USCA

Mighty Joe USOR

Milton USCA

Mockingbird USOR

Moffett Creek Gp. USCA

Mohawk Claim USOR

Moore USCA

Moscatelli USCA

Moscatelli No. 2 USCA

Mountain View USCA

Mountain View Gp. USCA

MuNaly USCA

Mulcahy Prospect USCA

Mule Creek USCA

Mum and Alice June Claim USCA

Murphy USCA

Muzzleloader (Stevens No. 1) USCA

New Hope USCA

New Hope Claim USOR

Newman USCA

Nichelini Mine USCA

Nickel Mountain USOR

Nickel Ridge USOR

No. 5 USCA

Noble Electric Co. USCA

Norcross USCA

North End, West End, Spotted Fawn USCA

North Fork Chrome USCA

North Star USOR

North Star (Red Mtn) USCA

Norway USOR

Oak Ridge USCA

Olive B. USOR

Olsen USCA

Onion Springs USOR

Oregon Chrome USOR

Oxford USCA

P. U. P. (Zenith) USCA

Paradise No. 1 USOR

Paradise No. 2 USOR

Park's Ranch USCA

Parker USCA

Parkeson USCA

Pearsoll Peak USOR

Peewan USCA

Peg Leg (Lambert) USCA

Pennington Butte USOR

Perconi Ranch USCA

Pillikin USCA

Pine Mountain Claim USCA

Pines USOR

Pleasant No. 1 & 2 USOR

Poco Tiempo Quartz USCA

Pony Shoe USCA

Poodle Dog USCA

Porter Property USCA

Powers USOR

Prater USOR

Pyramid USCA

Queen of May USOR

Quigg USCA

Rainbow USOR

Rainy Day USOR

Rancherie USOR

Randall USCA

Rattlesnake Mountain USCA

Ray (Tip Top) USOR

Ray Spring USOR

Red Ledge USCA

Red Mountain USOR

Red Slide Gp. USCA

Redskin USCA

Richards USCA

Richey, U.S. & S.J. USCA

Robt. E. USOR

Rock Creek USOR

Rock Wren Mine USCA

Rose Claim USCA

Rosie Claim USOR

Round Bottom USCA

Roupe USCA

Sad Sack USOR

Saddle Chrome USOR

Saint USCA

Sally Ann USOR

Salt Rock USOR

Saturday Anne USOR

Schmid USOR

Seiad Creek (Mt. View) USCA

September Morn USCA

Sexton Mountain USOR

Shade Chromite USOR

Shafer Lease USCA

Shamrock USCA

Shelly USCA

Sheppard Mine USCA

Shotgun Creek USCA

Silver Lease USOR

Simmons USCA

Simon USCA

Sims USCA

Six-Mile USOR

Skyline Mine USCA

Skyline No. 1 USCA

Skyline No. 2 USCA

Smith Geitsfield USOR

Snakehead (Jumbo) USCA

Snowy Ridge USCA

Snowy Ridge USOR

Snyder USCA

Sour Dough USOR

Sousa Ranch USCA

Southern Pacific Property USCA

Spot USCA

Spring Hill USCA

St. Patrick (Camp 8) USCA

Stafford USCA

Stark Bee USCA

State School USCA

Stevens-Miller USOR

Stewart USCA

Stone & Haskins USOR

Store Gulch USOR

Stray Dog USOR

Sullivan and Kahl USCA

Sunnyslope USCA

Sunrise USCA

Sunset (Fresno Co.) USCA

Sunset (Placer Co.) USCA

Sunshine USCA

Sutro Mine USCA

Suzy Bell (Lucky Strike) USCA

Swayne USCA

Sweetwater USCA

Tangle Blue Divide USCA

Tennessee Chrome USOR

Tennessee Pass USOR

Thompson Gp. USOR

Tomkin USCA

Toujours Gai USCA

Trinidad USCA

Twin Cedars USOR

Twin Valley USOR

Unnamed USCA

Uncle Sam USOR

Unknown Name USOR

Valen Prospect USOR

Valenti USCA

Victory No. 3 USCA

Violet USOR

Vogelgesang USCA

Wait USCA

Waite USCA

Walker USCA

War Bond USCA

War Eagle-Miller USCA

Ward USOR

Ward and Lyons USCA

Washout USCA

Welch Prospect USCA

West Chrome USCA

Western Magnesite USCA

White Bear USCA

White Cedar USCA

White Feather USCA

White Pine Mine USCA

Wild Cat Claim USOR

Wilder (Fish Creek) USCA

Windy Point USOR

Wolf Creek USCA

Wolf Creek area USCA

Wonder USOR

Wonder Gp. USOR

Yellow Pine USCA

Young USOR

Young's Mine USOR

Zerfirg Ranch USCA