Other localities - USA

This is a comprehensive list of alkaline localities in the USA, mostly, but not only (don´t underestimate me !), taken from the Wooley book (see below), generously given to me for 3 months by Peter G.Seroka - many thanks ! The mineral lists are certainly incomplete, I had to leave out things like „opaques“, and there is some confusion about the feldspar group minerals, which are not always named exactly (“antiperthite“).

As usual N to S and E to W:

Alaska:

Sdelwaik Lake: 18km². Syenites, juvite, malgnite a.o.. Kalsilite, melanite.

Inland Lake: 30km². Pulaskite, malignite, foyaite.

Ekiek Creek: 13km2. Malignite, pyroxenite, foyaite, juvit, ijolite,. Aegirine, aegirine-augite, biotite, cancrinite, melanite, muscovite (sericite), nepheline, orthoclase, titanite, zeolite grp.

Hunt Complex: 13km². Malignite, foyaite, dykes of trachyte, pulaskite, borolanite.

Selawik Hills Dykes: 25km². Foyaite,. borolaite.

Granite Mountain: 70km² pluton. Monzonites, foyaite, syenites, dykes of pulaskite, phonolite. Biotite, fluorite, garnet grp., hornblende, melanite, nepheline, plagioclase, pyroxene grp.

Windy Creek Pluton: Monzonites, foyaite. Hornblende, melanite.

Dry Canyon Stock: 12km². Foyaite, perthosite. Hornblende.

SE Seward Peninsula Alkaline Dykes: 260km² with swarms of dykes of pulaskite,foyaite. Feldspar grp., fluorite, melanite, nepheline.

Mount Prindle: Syenite, nepheline syenite. Aegirine-augite, allanite, biotite, britholite, nepheline, plagioclase, monazite, quartz, riebeckite, thorianite, thorite, uraninite.

Chichagof Island: 220km² complex. Syenites, monzonite, granodiorite, granite a.o.. Amphibole grp., biotite, cancrinite, fluorite, nepheline, pyroxene grp., sodalite.

Bokan Mountain: 29km². Peralkaline granites, syenites, aplites, pegmatites, different ring dykes (12 intrusive episodes !). Formerly U-mining. Aegirine, quartz, riebeckite, zircon.

Washington:

Golden Horn Batholith; 37x11km. Paeralkaline and bioitte granites, miarolitic cacities. . Aegirine, amphibole grp., apatite grp., arfvedsonite, astrophyllite, bastnaesite, biotite, elpidite, fluorite, magnetite, microcline, okanoganite, poylylithionite, quartz, riebeckite, zektzerite, zircon.

Kruger Mountain: Syenite/nepheline syenite.

Similkameen Pluton: Monzonites, granodiorite, malignite, syentic gneiss. Augite, biotite, hastingsite, microcline, nepheline, quartz.

Shiankers Bend Diatreme: 1km in diameter. Malignite, carbonatite, fenite a.o.

Rock Creek: 10km². Syenite. Apatite grp. augite, biotite, feldspar grp., magnetite, nepheline, olivine, titanite.

Shasket Creek: 3 plugs and a number of dykes, 65,km. Monzonite, nepheline syenite, shonkinite, syenite porphyry. Alteration of limestones. Actinolite, amphibole grp., andesine, biotite, calcite, melanite, microcline, muscovite (sericite), natrolite, nepheline, oligoclase, orthoclase, phlogopite, pyroxene grp., vesuviane, wollastonite.

Montana:

Bobtail Creek: 3.2km². Syenites. Aegirine-augite, amphibole grp., pyroxene grp.

Warland Creek: Small multiple syenite, monzonite, and granite intrusions, pegmatites.. Aegirine-augite, quartz.

Rainy Creek: Circular intrusion cut later by a syenite. Pyroxenite. Syenite, nepheline syenite, trachyte, phonolite, pegmatites. Major vermiculite and hydrobiotite mining. Aegirine, aegirine-augite, albite, andradite, apatite grp., biotite, calcite, diopside, dolomite, feldspar grp., hydrobiotite, magnetite, microcline, muscovite, nepheline, phlogopite, pyrite, quartz, riebeckite, titanite, vermiculite.

Haines Point: 6x2.5km. Syenite with alkaline dykes. Aegirine-augite.

Skalkaho: 7x2km. Pyroxenites, syenite, pegmatites, varied alkaline dykes. Aegirine-augite, amphibole grp., apatite grp., biotite, magnetite, quartz, salite, titanite, vermiculite.

Sweetgrass Hills: 3 buttes, domed and cut by igneous intrusions, main bodies laccolithic, but also sills present. Gabbroix rocks, syenites, trachytes, widespread minettes. Aegirine, aegirine-augite, amphibole grp., analcime, biotite, magnetite, narsarsukite, nepheline, orthoclase, quartz.

Bearpaw Mts.: (Loc.: Dark Star Claim, Big Sandy Creek, Pegmatite Peak) 2000km², thick lavas (2000m), pyroclastic rocks and lots of stocks, laccoliths, sills, and dykes. Pyroxenites, phonolites, trachytes, monzonites, shonkinites, nepheline syenites (with pegmatites), alkaline granosyenites. Aegirine, analcime, anatase, ancylite-(Ce), apatite grp., augite, barite, bastnaesite-(Ce), betafite, biotite, burbankite, calkinsite-(Ce), calcite, chevkinite-(Ce), crichtonite, eudialyte, gibbsite, hornblende, ilmenite, lamprophyllite, leucite, loparite-(Ce), magnetite, microcline, muscovite, nepheline, olivine, perovskite, plagioclase, pyrophanite, pyroxene grp., quartz, rutile, sanidine, sodalite, strontiochevkinite, thomsonite, thorite, titanite, zircon.

Gordon Butte, Crazy Mts. (Bearpaw Mts ?): Malignites, microcline microsyenites intruded by agpaitic nepheline-syenite pegmatites. Aegirine, aegirine-augite, analcime, ancylite, baotite, barytolamprophyllite, bastnaesite, benitoite, cafetite, calcioancylite, calcite, catapleiite, Ca-catapleiite, chalcopyrite, chamosite, dalyite, eudialyte, fluorapatite, goethite, hollandite-grp., hyalophane, illite, kassite, lamprophyllite, loparite-(Ce), magnesio-arfvedsonite, magnetite, mangan-neptunite, microcline, muscovite, natrolite, nepheline, olivine, parisite, phlogopite, pyrite, pyrophanite, richterite, rinkite, sanidine, sodalite, thomsonite, thorite, titanite, wadeite, zeolites, zircon.

Rocky Boy Stock: (Really part of Bearpaw Mts. !) 30km². Pyroxenite, shonkinite, syenites, monzonites, nepheline syenite, phonolite, carbonatite. Aanalcime, apatite grp., augite, biotite, calcite, cancrinite, clinopyroxene, feldspar grp., nepheline, olivine, orthoclase, plagioclase, pyrite, pyrrhotite, quartz.

Little Rocky Mountains: Granite and syenite porphyry, phonolite.. Aegirine, aegirine-augite, biotite, feldspar grp., hornblende, nepheline.

Missouri River Breaks Diatremes: Peridotite, alnoite, shonkinite, syenite, monzonite. Forsterite, melilite, monticellite, nepheline, perovskite, phlogopite.

Highwood Mountains: 50x50km. Volcanic centre of flows, dykes, stocks, and laccoliths - phonolite. Aegirine, albite, amphibole grp., analcime, apatite grp., augite, biotite, diopside, feldspar grp., hornblende, leucite, magnetite, melilite, monticellite, natrolite, nepheline, olivine, quartz, sanidine, titanite, zeolite grp..

Shonkin Sag: (The largest Highwodd Mts.laccolith): „An outstanding example of the differentiation on place of an undersaturated alkaline magma.“ Shonkinite, syenitesm upper and lower chilled margins, centrally a nepheline syenite. Aegirine, arfvedsonti,e biotite, feldspar grp., melanite, nepheline, olivine, phlogopite, salite, sanidine, zeolite grp.

Big Belt Mountains: Intrusion of basic volcanics with sills, dykes and plugs of syenogabbro, trachybasalt, monzonite. Aegirine-augite, albite, analcime, anorthoclase, augite, biotite, olivine, orthoclase, plagioclase.

Little Belt Mountains:(Loc.: Yogo Peak): Laccoliths and other intrusions. Syenites, shonkinites, monzonite, lamprophyres - only a few are alkaline. Analcime, sodalite, zeolite grp.

Northern Margin of Boulder Batholith: Peralkaline and nepheline-bearing rocks. Shonkinite.

Mocassin Mountains: One large laccolith, stocks, sills, small laccoliths. Former gold-mining. Aegirine-augite, andesine, apatite grp.,biotite, hornblende, magnetite, sanidine, titanite, zircon.

Judith Mountains: 6 principal laccoliths, sills. Granite and syenite porphyrys, nepheline syenite, tinguaite, phonolite. Aegirine, aegirine-augite, analcime, diopside, feldspar grp., hornblende, melanite, nepheline, sodalite, zeolite grp.

Smoky Butte: Plugs and dykes in sediment. Lamporite. Anamlcime, armalcolite, diopside, montmorillonite, olivine, phlogopite, priderite, richterite, riebeckite, sanidine.

Castle Mountains: Trachytic intrusions.

Crazy Mountains. Laccoliths, stocks, sills and dykes in sandstone. Theralites, nepheline syenites, shonkinite. Aegirine, aegirine-augite, amphibole grp., analcime, apatite grp., biotite, diopside, feldspar grp., nepheline, nosean, olivine, orthoclase, sodalite, titanite.

Ravalli County: (Bitterroot Base Line, loc.: Snowbird Mine): Carbonatite dykes and veins. Aeschynite, ancylite, baotite, barite, bastnaesite, calcite, columbite, dolomite,fersmite, parisite-(Ce), rutile, thorite.

Idaho:

Lemhi County: See above: Montana, Ravalli Co.

Big Southern Butte. Aphyric comendite lava.

Oregon:

Lincoln County: Nepheline syenite, phonolite as sheets, dykes and one stock. Aegirine-augite, albite, analcime, muscovite (Sericite), nepheline, olivine, riebeckite.

Suplee-Izee Area: Peralkaline tuffs, lapilli, breccia as erosional remnants. Aegirine, amphibole grp., andesine, oligoclase, riebeckite, sanidine.

Wagontire Mountain: Alkali ash-flow tuff. Aegirine-augite, amphibole grp., feldspar grp., magnetite, quartz.

Buzzard Creek: Peralkaline ash-flow tuff. Aegirine-augite, clinopyroxene, hornblende, magnetite, plagioclase, sanidine.

Hart Mountain: Pantellertie flows and intrusions. Aegirine, aenigmatite, diopside, feldspar grp., quartz, riebeckite.

California:

Santa Rosa: Peralkaline rhyolite. Aegirine, aenigmatite, anorthoclase, arfvedsonite, quartz, sanidine.

New Idria (Dallas Gem mine Area): 1 stocks in serpentinite, shales and sandstone. Albite, barkevikite.

San Joaquin-Kings Volcanic Field: Remnanats of over 100 small lava flows, necks and dykes on granitic terrain. Alkali basalts, trachybasalts, basanites, phonolites. Apatite grp., biotite, leucite, olivine, phlogopite, plagioclase, pseudobrookite.

Deep Spring Valley: Melaleucitite, trachybasalt. Augite, biotite, leucite, magnetite, olivine, plagioclase, sanidine.

Coyote Peak: 500x260m. Mafic alkali diamtre, 2 unnamed alkaline rock types, unmapped. Aegirine, amphibole grp., apatite grp., arfvedsonite, bartonite, coyoteite, djerfisherite, erdite, garnet grp., magnetite, melilite, microcline, natrolite, nepheline, olivine, orickite, pectolite, perovskite, phlogopite, pyrrhotite, rasvumite, richterite, sodalite, tainiolite.

Burro Springs: in Death Valley NP, 3.5x1km of dykes, sills an dlarger intrusions. Syenites, nepheline syenites, monzonites, nordmarktie. Aegirine-augite, amphibole grp., andesine, biotite, hastingsite, melanite, natrolite, nepheline, oligoclase, perthite. Plagioclase.

Mountain Pass: Shonkinite, syenite, granite with assoc. dykes in metamorphic rocks, carbonatite intrusions. In this carbonatite the „Sulfide Queen Mine“ is the world´s largest producer of REE. Aegirine, aegirine-augite, allanite-(Ce), ankerite, apatite grp., aragonite, arvedsonite, augite, barite, bastnaesite-(Ce) (in some rocks up to 60% !), biotite, calcite, cerite-(Ce), chlorite grp., crocidolite, dolomite, epidote, fluocerite-(Ce), fluorite, galena, goethite, hematite, hornblende, magnetite, microcline, monazite-(Ce), olivine, orthoclase, parisite-(Ce), perthite, phlogopite, pyrite, quartz, riebeckite, sahamelite-(Ce), siderite, thorit, zircon.

Nevada:

Soldier Meadow Volcanic Centre: Peralkaline tuff and lavas, peralkaline rhyolites. Aenigmatite, augite, biotite, ilmenite, magnetite, quartz, richterite, sanidine, zircon.

Idaho Canyon Tuff: Peralkaline tuff. Amphibole grp., arfvedsonite, pyroxene grp., quartz, sanidine.

McDermitt Volcanic Field: Comenditic ash-flow sheets. Aenigmatite, amphibole grp., apatite grp., clinopyroxene, fayalite, feldspar grp., ilmenite, quartz, sanidine.

Black Mountain: Subalkaline basalts to peralkaline trachytic rhyolites, comendites, pantellerites. Barkevikite, biotite, chevkinite, clinopyroxene, fayalite, hedlspar grp., plagioclase, quartz, zircon.

Silent Canyon Volcanic Centre: Comndites, trachytes, trachytic rhyolites. Aegirine, anorthoclase, apatite grp., arfvedsonite, clinopyroxene, cristobalite, fayalite, quartz, sanidine, tridymite, zircon.

Kane Springs Wash: Comendites, trachytic rhyolites, trachytes. Arfvedsonite, biotite, clinopyroxene, fayalite, hornblende, plagioclase, quartz, riebeckite, sanidine.

Utah:

Moon Canyon, Smith-Morehouse Canyon, Whites Creek: Dykes, plugs, flows of lamproitic rocks. Amphibole grp., analcime, apatite grp., clinopyroxene, diopside, melilite, olivine, phlogopite, serpentine grp.

San Rafael Swell: 200km², plugs, dykes, and sills. Amphibole grp., analcime, augite, biotite, labradorite, natrolite, olivine, thomsonite.

La Sal Mountains: Laccoliths. Porphyritic diorite, nosean syenite, peralkaline syenites and granites, monzonite. Aegirine-augite, albite, augite, biotite, hornblende, nosean, perthite, plagioclase, sodalite.

Arizona:

Navajo Country (also Utah, New Mexico: 250x180km, cluster of centres. Volcanic necks and diatremes, breccias, tuffs, radial dykes. Minettes, monchiquitesm alnoite, peridotite. Analcime, apatite grp., biotite, feldspar grp., leucite, melilite, nepheline, pyroxene grp., sanidine.

Hopi Buttes: Area aof 50x55km. Volcanic necks, flows, maar type craters. Tuffs, breccias, limburgite, monchiquite. Amphibole grp., analcime, apatite grp., augite, biotite, feldspar grp., olivine, pyroxene grp., sanidine.

San francisco Mountain: Cones and flows, one of comendite lava. Amphibole grp., feldspar grp., quartz, zircon.

Blue Range Primitive Area: Basaltic andesite, rhyolite.

Boulder Dam Area: Camptonite dykes. Kaersutite.

Wyoming:

Green River Formation: Huge area stretching into Utah and Colorado, extensive drilling by oil companies. Alkaline complex, disseminated dolomitic oil shales. Aegirine, analcime, barytocalcite, bradleyite, burbankite, calcite, crocydolite, dawsonite, dolomite, eitelite, ewaldite, garrelsite, halite, labuntsovite, leucosphenite, loughlinite, magnesiokatophorite, magnesioriebeckite, mckelveyite-(Y), montmorillonite, nahcolite, neighborite, nordstrandite, norsethite, northupite, pirssonite, pyrite, reedmergnerite, searlesite, shortite, starkeyite, trona, wegscheiderite, wellsite, wurtzite.

Leucite Hills: 70x35km. Wyomingite, orendite, madupite. Apatite grp., diopside, leucite, magnetite, magnophorite, perovskite, phlogopite, priderite, sanidine, spinel, wadeite.

Rattlesnake Hills: 42 vents and intrusions. Rhyolite, trachyte, latites, phonolite. Aegirine, aegirine-augite, amphibole grp., analcime, biotite, feldspar grp., hauyne, nosean, sanidine, zeolite grp.

Northern Black Hills Igneous Province:

- Barlow Canyon: Aegirine, aegirine-augite, analcime, biotite, feldspar grp.

- Missouri Buttes: Phonolite. Aegirine, aegirine-augite, apatite grp., feldspar grp., magnetite, nepheline.

- Devil´s Tower: Phonolite. Aegirine, augite, feldspar grp., nepheline, orthoclase, zeolite grp.

- Bear Lodge Mountains: Over 30 separate bodies. Porphyritic rocks, trachytes, phonolites, syenite, nepheline syenite, carbonatite,. Actinolite, aegirine, aegirine-augite, amphibole grp., ancylite, andesine, bastnaesite, biotite, calcite, feldspar grp., fluorite, hornblende, magnetite, melanite, nepheline, oligoclase, plagioclase, sanidine, strontianite.

- Black Buttes: Nepheline syenite, syenite. Aegirine-augite, amphibole grp., analcime, feldspar gp., melanite, nepheline, nosean, sodalite.

- Inyan Kara Mountain: Syenites. Aegirine-augite, amphibole grp., diopside, feldspar grp., magnetite.

- Mineral Hill. Nepheline syenite, jacupirangite.

South Dakota:

- Lead-Deadwood Dome: 0x15km. Rhyolites, peralkaline syenites, monzonites, phonolite, nepheline syenite., tinguaite. Aegirine, aegirine-augite, analcime, biotite, feldspar grp., nepheline, quartz, sodalite, zeolite grp.

Lawrence Co.: Phonolite. Sodalite.

Colorado:

Jamestown: Nepheline syenites, alkali granosyenites. Allanite-(Ce), arfvedsonite, britholite-(Ce), cerite-(Ce), epidote, fluorite, kainosite-(Y), mnazite-(Ce), quartz, toernebohmite, uraninite.

Camp Albion: Nepheline syenite. Eckermannite.

Fortification Dike: Syenite. Aegirine-augite, amphibole grp., analcime, augite, biotite, oligoclase, olivine, orthoclase.

Sloan Pipe: Kimberlite pipe with carbonatite xenoliths. Barite, biotite, calcite, dolomite, phlogopite, serpentine grp.

Iron Hill: 31km², embedded in metamorphic and igneous rocks. Uncompahgreite, pyroxenite, ijolite, nepheline syenite, carbonatite. Aegirine, aegirine-augite, akermanite, amphibole grp., apatite grp., augite, barite, bastnaesite, biotite, calcite, diopside,dolomite, fluorite, ilmenite, magnetite, melanite, melilite, microcline, nepheline, othoclase, parisite, perovskite, pyrite, pyrochlore, siderite, synchysite, titanite, vermiculite.

Allard Stock: Syenitic stocks. Aegirine-augite, feldspar grp..

South Park: Dyke an dsill of lamprophyre. Aegirine-augite, albite, analcime, biotite, feldspar grp., natrolite, olivine, thomsonite.

Cripple Creek: Phonolites, trachytes, syenite. Aegirine, aegirine-augite, amphibole grp., analcime, biotite, feldspar grp., leucite, melilite, nepheline, nosean, plagioclase, sodalite.

Pikes Peak: Alkali granites, syentie. Bastnaesite-(Ce), fluocerite-(Ce), microcline(world famous amazonite).

St.Peter´s Dome: (Loc.:Cryolite Mine, Eureka Tunnel, Site 60-3) Riebeckite syenite, cryolite deposit. Astrophyllite, cryolite, elpasolite, fluorite,, gearksutite, murataite-(Y), nacrite, pachnolite, prosopite, pyrochlore, quartz, ralstonite, riebeckite, thomsenolite, thorite, weberite, xenotime-(Y), zircon.

Mount Rosa: Granites with some quartz syenite. Aegirine, albite, arfvedsonite, astrophyllite, bastnaesite, biotite, fayalite,fluorite, ilmenorutile, microcline, monazite, oligoclase, pyrite, pyrochlore, quartz, riebeckite, zircon.

Wet Mountains: 3 complexes and dyke swarms with carbonatite, Calcite, dolomite, magnesite, thorite.

Amethyst and Gribble Mountain: 1x0.3km. Silico-carbonatite dykes. Barite, calcite, hematite, quartz.

Pinon Peak: 2 breccia pipes. Aegirine, calcite, crocydolite, phlogopite.

Goldie: Carbonatite bands. Aegirine, barite, cryolite, feldspar grp., pchnolite, prosopite, ralstonite, riebeckite, weberite.

McCoy Gulch: Carbonatite. Apatite grp., barite, feldspar grp., magnetite, pyrite.

McClure Mountain-Iron Mountain: Nepheline syenite, ijolite, pyroxenites, phonolite, trachyte, carbonatite. Aegirine, amphibole grp., biotite, bytownite, clinopyroxene, labradorite, magnetite, nepheline, sodalite, spinel, titanite.

Gem Park: 3km². Pyroxenite, gabbro, nepheline syenite, lamprophyric and carbonatite dykes. Actinolite, egirine-augite, amphibole grp., analcime, apatite grp., barite, biotite, clinopyroxene, dolomite, fersmite, labradorite, lueshite, magnetite, microcline, monazite, muscovite, (sericite), natrolite, natroniobite, nepheline, phlogopite, pyrochlore, sodalite, spessartite, “sulfides“, thoritanite, titanite, tremolite, vermiculite (large scale mining).

Democrat Creek: 9km². Quartz syenites, breccias, pyroxenties. Albite, amphibole grp., biotite, clinopyroxene, fluorite, hornblende, magnetite, microcline, plagioclase, quartz, zircon.

Spanish Peaks: Dyke swarm, teschenite, shonkinite, syenites. Aegirine, analcime, anorthoclase, arfvedsonite, barkevikite, diopside, feldspar grp., riebeckite.

New Mexico: Point Of Rocks and Wind Mountain have their own page.

Raton-Clayton Volcanic Field: Field of 2000km², about 90 cones. Andesitic lavas, basanite, trachytes, phonolites in the SW. Aegirine, aegirine--augite, amphibole grp., analcime, andesine, biotite, hauyne, leucite, magnetite, melilite, nepheline, olivine, sodalite, titanite.

Monte Largo: Melteigite sill and carbonatite dyke.

Lobo Hill: 100x300m². Syenite in shists. Albite, amphibole grp., calcite, fluorite, hematite, magnetite, muscovite (sericite), oligoclase, orthoclase, quartz.

Pedernal Hills: 3 syenite dykes. Amphibole grp., feldspar grp., hematite, muscovite (sericite), py<roxene grp., quartz.

Lemitar Mountains: Carbonatite dykes. Ankerite, apatite grp., bastnaesite, biotite, calcite, chlorite grp., dolomite, fluorite, magnetite, phlogopite, quartz.

Caballo Mountains: Monzonites, radioactive potassic dykes. Bastnaesite, fluorocarbonate“, microcline, thorite, uranophane.

Sierra Blanca Region: Several stocks and dykes. Syenites, gabbroic alkaline dykes, trachyphonolites, trachyte, phonolite. Amphibole grp., biotite, quartz, nepheline, sodalite.

Pajarito Mountain:Remnant of igneous rocks. Syenites, pegmatites. Aegirine, aegirine-augite, albite, arfvedsonite, eudialyte, fluorite, hornblende, microcline, orthoclase, perthite, quartz, riebeckite.

Cornudas Mountains and Diablo Plateau: (Partly in Texas): See Wind Mountain.

Peck´s Mesa: Phonolite sills. Villiaumite

Texas:

Marble Canyon and Cave Peak: Gabbro, nepheline syenite, pegmatites, quartz syenites.. Eudialyte.

Davis Mountains and Barilla Mountains: Trachytes, rhyolite, often comenditic, phonolite, syenite a.o.. Aegirine-augite, aenigmatrite, analcime, arfvedsonite, feldspar grp., nosean, olivine.

Chinati Mountains: Rhyolite, trachyte. Aegirine, aegirine-augite, amphibole grp., anorthoclase, biotite, fluorite, quartz.

Terlingua-Big Bend: Over 300 plugs, laccoliths and bodies, sills and dykes. Basalt, phonolite, trachyte, nonzonite. Aegirine, aegirine-augite, analcime, arfvedsonite, augite, fayalite, feldspar grp., fluorite (mining), hornblende, nepheline, olivine, quartz, rhoenite.

Rode Ranch: Alkaline pegmatites. Behoite, gadolinite-(Y).

Balcones Province: Over 200 plugs, sills, volcanic remnants. Nephelinites, phionolite, basalt, basanite. Amphibole grp., apatite grp., augite, biotite, clinopyroxene, melilite, nepheline, olivine, perovskite, spinel.

Franklin Mountains: Alkali feldspar granite, quartz syenite, peralkalic arfvedsonite granite and others.

Nebraska:

Elk Creek: Carbonatites. Ankerite, apatite grp., barite, chalcopyrite, dolomite, fluorite, galena, hematite, phlogopite, pyrite, quartz, serpentine grp., sphalerite.

Kansas:

Woodson County: Lamproite sills. Apatite grp., diopside, dolomite, magnetite, olivine, perovskite, phlogopite, quartz, richterite, serpentine grp., spinel.

Hills Pond: Lamproite. Perovskite.

Oklahoma:

Reformatory and Quanah Granites: Aegirine, albite, biotite, hornblende, oligoclase, orthoclase, perthite, riebeckite.

Wisconsin:

Wolf River Batholith: Syenites. Biotite.

Wausau and Stettin: Monzonites, syenites, nepheline syenite. Aegirine, amphibole grp., arfvedsonite, augite, barkevikite, biotite, cancrinite, fayalite, fluorite, nepheline, pyrochlore, pyroxene grp., olivine, riebeckite, sodalite.

Mellon: Related to Coldwell, Ontario, Canada (see there). Carbonatite

Missouri:

Avon: 79 diatremes and dykes. Peridotite, alnoite. Apatite grp., chromite, magnetite, melilite, olivine, perovskite, phlogopite, pyroxene grp., serpentine grp.

Illinois:

Hicks Dome: Peridotite, maprophyre. Aegirine, aegirine-augite, amphibole grp., biotite, dolomite.

Tennessee:

Robroy-MacGregor #1 Well: Nepheline syenite in borehole.

Bateman #1 Well: Nepheline syenite in borehole.

Arkansas: Own page !

Louisiana:

Monroe Uplift:(also Arkansas and Mississippi): Igneous rocks found by drilling. Nepheline syenites, phonolites, tinguaites, pyroxenite, monchiquites. Aegirine-augite, analcime, augite, biotite, nepheline, plagioclase, pyroxene grp..

Mississippi:

Jackson Dome: Igneous rock in drill cores. Tinguaites, nephelinite. Aegirine, amphibole grp., analcime, apatite grp., melanite, pyroxene grp., titanite.

Maine:

Litchfield: 3x3km pluton. Leucosyenite, nephelinesyenite, litchfieldite, albitite pegmatite. Aegirine, aegirine-augite, albite, amphibole grp., arfvedsonite, biotite, cancrinite, corundum, feldspar grp., fluorite, garnet, magnetite, microcline, nepheline, riebeckite, sodalite. Tourmaline, zircon.

Pleasant Mountain: Nordmarkite, syenites, monzonite. Amphibole grp., analcime, biotite, hornblende, oligoclase, perthite, pyroxene grp., quartz.

Gulf of Maine: Peralkaline granites. Aegirine, aenigmatite, amphibole grp., apatite grp., astrophyllite, fayalite, hornblende, magnetite, pyroxene grp., quartz, riebeckite, titanite, zircon.

Agamenticus: 9km in diameter. Peralkaline granite, syenites. Aegirine-augite, amphibole grp., arfvedsonite, fayalite, perthite, quartz, riebeckite.

New Hampshire:

White Mountain Magma Series: Gabbro, monzonite, syenites. Astrophyllite, biotite, fayalite, hastingsite, hedenbergite, pyroxeme grp., quartz, riebeckite.

Red Hill (=Red Mountain): (PArt of White Mts.): Syenites, nepheline syenite, foyaites. Aegirine-augite, amphibole grp., arfvedsonite, astrophyllite, biotite, cancrinite, chevkinite, ferrohastingsite, mosandrite, nepheline, perthite, plagioclase, quartz, rosenbuschite, sodalite, woehlerite, zircon.

Vermont:

Cuttingsville: 2.3x1.7km. Foyaites, diorites, essixite, syenites, larvikite. Aegirine-augite, augite, biotite, cancrinite, hedenbergite, kaersutite, labradorite, magnesiohastingsite, nepheline, perthite, pigeonite, quartz, sodalite.

Massachusetts:

Cape Ann Granite: Slightlky peralkaline syenite-granite, pegmatites. Aegirine-augite, amphibole grp., fayalite, hedenbergite, lepidomelane, riebeckite, zircon.

Peabody Granite: 8.5x5.5km. Granite. Aegirine-augite, amphibole grp., apatite grp., arfvedsonite, biotite, lamprophyllite, perthite, pyrochlore, quartz, riebeckite, zircon.

Beverly Syenite: Syenite, dykes of nepheline syenite, pulaskite, nordmarkite. Aegirine-augite. Albite, amphibole grp., arfvedsonite, biotite, nepheline, perthite, sodalite.

Quincy Granite: Peralkaline granite, pegmatites. Aegirine, microcline, parisite-(Ce),quartz, riebeckite.

Rattlesnake Pluton: Riebeckite granite, biotite granite in monzonite. Biotite, microcline, quartz, riebeckite.

Salem Sodalite.

Rhode Island:

Rhode Island: Peralkaline granites. Aegirine, amphibole grp., fluoorite, microcline, quartz, riebeckite.

Connecticut:

Joshus Rock Gneiss: Granite gneiss. Aegirine-augite, microcline, quartz.

New Jersey:

Beemerville: Carbonatite, phonolite, tinguaite., nepheline syenite. Aegirine, aegirine-augite, albite, analcime, apatite grp., biotite, calcite, cancrinite, diopside, fluorite, hednbergite, magnetite, melanite, nepheline, orthoclase, pyrite, sodalite, titanite.

Brookville: Syenite. Albite, analcime, augite, biotite, calcite, chlorite grp., fluorite, ilmenite, kaersutite, natrolite, nepheline, perthite, pyrite.

Wykertown: Nepheline syenite. Allanite, andradite, natrolite.

Virginia:

Augusta County: Dyke suite. Teschenites, camptonites, syenites, peridotites a.o..Aegirine, amphibole grp., biotite, nepheline, olivine, quartz, spinel.

Robertson River: 8 plutons, syenogranites to alkali feldspar syenites.

North Carolina:

Mount Rogers: (stretching into Virginia): Peralkaline volcanic rocks. Aegirine, riebeckite.

Fountain Granite: Peralkaline granie. Aegirine, albite, amphibole grp., arfvedsonite, bafertisite, calcite, fluorite, ferroeckermannite, ferrorichterite, magnetite, microcline, quartz.

&Suggested reading:

Woolley, A.R.: Alkaline Rocks and Carbonatites of the World. Part 1: North and South America. British Museum (Natural History), London, 1987

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