Chugach Mountains-Kodiak Island PGE |
Alaska |
Alaska |
Mafic magmatic |
Chromite; Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Goodnews Bay (Kilbuk Terrane) PGE |
Alaska |
Alaska |
Mafic magmatic |
Chromite; Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Kokrine Hills-Yukon Flats (Tozitna and Angayucham Terranes) PGE |
Alaska |
Alaska |
Mafic magmatic |
Chromite; Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Northern Brooks Range (Angayucham Terrane) PGE |
Alaska |
Alaska |
Mafic magmatic |
Chromite; Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Southeast Alaska Fairweather trend PGE |
Alaska |
Alaska |
Mafic magmatic |
Chromite; Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Southeast Alaska PGE |
Alaska |
Alaska |
Mafic magmatic |
Chromite; Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Southern Brooks Range (Angayucham Terrane) PGE |
Alaska |
Alaska |
Mafic magmatic |
Chromite; Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Talkeetna Mountains-Eastern Alaska Range PGE |
Alaska |
Alaska |
Mafic magmatic |
Chromite; Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Yukon-Tanana Upland (Seventymile Terrane) PGE |
Alaska |
Alaska |
Mafic magmatic |
Chromite; Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Eastern Upper Peninsula mafic intrusion |
North Central |
Michigan |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Mentor Intrusive Complex |
North Central |
Minnesota |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Midcontinent Rift conduit-type magmatic sulfide Ni-Cu-PGE |
North Central |
Michigan; Minnesota; Wisconsin |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Midcontinent Rift large mafic intrusions |
North Central |
Minnesota; Wisconsin |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Midcontinent Rift layered Ti-Fe in the Duluth Complex |
North Central |
Minnesota |
Mafic magmatic |
Iron-titanium oxide |
iron; phosphorus |
Midcontinent Rift mafic-ultramafic satellite intrusions |
North Central |
Michigan; Wisconsin |
Mafic magmatic |
Iron-titanium oxide; Nickel-copper-PGE sulfide |
copper; gold; iron; phosphorus; selenium; silver |
Midcontinent Rift oxide-ultramafic intrusions (OUIs) |
North Central |
Minnesota |
Mafic magmatic |
Iron-titanium oxide; Nickel-copper-PGE sulfide |
copper; gold; iron; phosphorus; selenium; silver |
Midcontinent Rift 'reef'-type PGE |
North Central |
Minnesota; Wisconsin |
Mafic magmatic |
PGE (low sulfide) |
(none) |
Neoarchean Greenstone Belts of Minnesota, North Dakota and South Dakota |
North Central |
Minnesota; North Dakota; South Dakota |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Non-Midcontinent Rift mafic/ultramafic intrusions |
North Central |
Iowa; Michigan; Minnesota |
Mafic magmatic |
Iron-titanium oxide; Nickel-copper-PGE sulfide |
copper; gold; iron; phosphorus; selenium; silver |
Northeast Iowa intrusive complex (NEIIC) |
North Central |
Iowa; Minnesota; Wisconsin |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Otter Creek complex and related Iowa intrusions |
North Central |
Iowa |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
South Dakota mafic intrusions |
North Central |
Nebraska; South Dakota |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Walsh County gabbro |
North Central |
North Dakota |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Boil Mountain Complex |
Northeast |
Maine |
Mafic magmatic |
Chromite; Nickel-copper-PGE sulfide |
asbestos; copper; gold; selenium; serpentinite; silver; talc |
CAMP event-Newark-Gettysburg Basin |
Northeast |
Maryland; New Jersey; New York; Pennsylvania |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Connecticut Ni-Co-Cu sulfides |
Northeast |
Connecticut |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Hartford-Deerfield Mesozoic Basin |
Northeast |
Connecticut; Massachusetts |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Maryland Ni-Co-Cu sulfides |
Northeast |
Maryland |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Moxie Pluton |
Northeast |
Maine |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Ore Mountain (Katahdin Iron Works) |
Northeast |
Maine |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Sanford Lake-Tahawas Mining District |
Northeast |
New York |
Mafic magmatic |
Iron-titanium oxide |
iron; phosphorus |
Saratoga Nickel District |
Northeast |
New York |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
St. Lawrence Pyrites Complex |
Northeast |
New York |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
State Line district/BMC (Baltimore Mafic Complex) |
Northeast |
Delaware; Maryland; New Jersey; Pennsylvania |
Mafic magmatic |
Chromite |
asbestos; serpentinite; talc |
Union-Warren nickel sulfide deposits |
Northeast |
Maine |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Vermont ultramafic belt |
Northeast |
Vermont |
Mafic magmatic |
Chromite |
asbestos; serpentinite; talc |
Washington County intrusive rocks |
Northeast |
Maine |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Bitterroot Range anorthosite |
Northwest |
Montana |
Mafic magmatic |
Iron-titanium oxide |
iron; phosphorus |
Blue Mountains province |
Northwest |
Oregon |
Mafic magmatic |
Chromite |
(none) |
California Coastal Ranges chromite |
Northwest |
California |
Mafic magmatic |
Chromite |
(none) |
Klamath Mountains chromite |
Northwest |
California; Oregon |
Mafic magmatic |
Chromite |
(none) |
Ingalls ophiolite |
Northwest |
Washington |
Mafic magmatic |
Chromite; Nickel-copper-PGE sulfide |
copper; gold; iron; selenium; silver |
Lady of the Lake mafic intrusive |
Northwest |
Montana |
Mafic magmatic |
PGE (low sulfide) |
gold |
Moyie |
Northwest |
Idaho; Montana; Washington |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
North-Central Washington ultramafics |
Northwest |
Washington |
Mafic magmatic |
Chromite; Nickel-copper-PGE sulfide |
copper; gold; iron; selenium; silver |
Red Lodge chromite |
Northwest |
Montana |
Mafic magmatic |
Chromite |
(none) |
Sierra Nevada foothills chromite |
Northwest |
California |
Mafic magmatic |
Chromite |
(none) |
Stillwater Complex |
Northwest |
Montana |
Mafic magmatic |
Chromite; Nickel-copper-PGE sulfide; PGE (low sulfide) |
copper; gold; selenium; silver |
Tobacco Root chromite |
Northwest |
Montana |
Mafic magmatic |
Chromite |
(none) |
Wolf Creek pluton/Ruby Mountains |
Northwest |
Montana |
Mafic magmatic |
Chromite; Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Central Laramie Range |
Rocky Mountains |
Wyoming |
Mafic magmatic |
Chromite; Iron-titanium oxide; Nickel-copper-PGE sulfide |
copper; gold; iron; lead; phosphorus; selenium; silver |
Medicine Bow Mountains |
Rocky Mountains |
Colorado; Wyoming |
Mafic magmatic |
Chromite; Iron-titanium oxide; Nickel-copper-PGE sulfide |
copper; gold; iron; lead; phosphorus; selenium; silver |
Sierra Madre |
Rocky Mountains |
Colorado; Wyoming |
Mafic magmatic |
Chromite; Nickel-copper-PGE sulfide |
copper; gold; iron; lead; selenium; silver; vermiculite |
Sweetwater Arch |
Rocky Mountains |
Wyoming |
Mafic magmatic |
Chromite; Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Wet Mountains |
Rocky Mountains |
Colorado |
Mafic magmatic |
Iron-titanium oxide; Nickel-copper-PGE sulfide |
iron; phosphorus; silver |
Wyoming Metasedimentary and Metavolcanic Belts |
Rocky Mountains |
Wyoming |
Mafic magmatic |
Chromite; Iron-titanium oxide; Nickel-copper-PGE sulfide |
copper; gold; iron; phosphorus; selenium; silver |
Elliot County peridotite |
South Central |
Kentucky |
Mafic magmatic |
Chromite; PGE (low sulfide) |
(none) |
Wichita event—Glen Mountains Complex |
South Central |
Oklahoma |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
CAMP event-Virginia, North Carolina Mesozoic basins |
Southeast |
North Carolina; Virginia |
Mafic magmatic |
Nickel-copper-PGE sulfide; PGE (low sulfide) |
copper; gold; selenium; silver |
Concord-Salisbury Plutonic Suite |
Southeast |
Georgia; North Carolina; South Carolina |
Mafic magmatic |
Chromite |
dimension stone |
South Central Triassic basins |
Southeast |
Alabama; Florida; Georgia; North Carolina; South Carolina |
Mafic magmatic |
Chromite; Nickel-copper-PGE sulfide; PGE (low sulfide) |
copper; gold; selenium; silver |
Southeast Ultramafics Cr-Mg; Blue Ridge belt |
Southeast |
Georgia; North Carolina; Virginia |
Mafic magmatic |
Chromite |
anthophyllite; asbestos; olivine; serpentine; talc-soapstone |
Southeast Ultramafics Cr-Mg; Carolina Slate belt |
Southeast |
North Carolina |
Mafic magmatic |
Chromite |
anthophyllite; asbestos; olivine; serpentine; talc-soapstone |
Southeast Ultramafics Cr-Mg; Charlotte belt |
Southeast |
North Carolina |
Mafic magmatic |
Chromite |
anthophyllite; asbestos; olivine; serpentine; talc-soapstone |
Southeast Ultramafics Cr-Mg; Eastern Slate belt |
Southeast |
North Carolina |
Mafic magmatic |
Chromite |
anthophyllite; asbestos; olivine; serpentine; talc-soapstone |
Southeast Ultramafics Cr-Mg; Georgia, undifferentiated |
Southeast |
Georgia |
Mafic magmatic |
Chromite |
anthophyllite; asbestos; olivine; serpentine; talc-soapstone |
Southeast Ultramafics Cr-Mg; Inner Piedmont |
Southeast |
Alabama |
Mafic magmatic |
Chromite |
anthophyllite; asbestos; olivine; serpentine; talc-soapstone |
Southeast Ultramafics Cr-Mg; Inner Piedmont, Smith River Allochthon, Sauratown Mountain |
Southeast |
North Carolina |
Mafic magmatic |
Chromite |
anthophyllite; asbestos; olivine; serpentine; talc-soapstone |
Southeast Ultramafics Cr-Mg; Raleigh belt |
Southeast |
North Carolina |
Mafic magmatic |
Chromite |
anthophyllite; asbestos; olivine; serpentine; talc-soapstone |
Southeast Ultramafics Cr-Mg; South Carolina, undifferentiated |
Southeast |
South Carolina |
Mafic magmatic |
Chromite |
anthophyllite; asbestos; olivine; serpentine; talc-soapstone |
Virginia nelsonites |
Southeast |
Virginia |
Mafic magmatic |
Iron-titanium oxide |
iron; phosphorus |
Yadkin-Richland Mining District |
Southeast |
North Carolina |
Mafic magmatic |
Iron-titanium oxide |
iron; phosphorus |
Friday Mine |
Southwest |
California |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Pecos |
Southwest |
New Mexico; Texas |
Mafic magmatic |
Nickel-copper-PGE sulfide; PGE (low sulfide) |
copper; gold; selenium; silver |
San Gabriel Mountains anorthosite |
Southwest |
California |
Mafic magmatic |
Iron-titanium oxide |
iron; phosphorus |
Southwest diabase province |
Southwest |
Arizona |
Mafic magmatic |
Nickel-copper-PGE sulfide |
copper; gold; selenium; silver |
Zuni Mountains PGE |
Southwest |
New Mexico |
Mafic magmatic |
PGE (low sulfide) |
(none) |