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Maine, USA

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Deposits of rare-element-bearing and gem-bearing granite pegmatites are well-known in Oxford, Androscoggin, and Sagadahoc Counties in the southwest portion of the State. These pegmatites were formerly noted for ceramic-grade feldspar production along with beryl and sheet muscovite. There are many lithium- and cesium-enriched LCT pegmatites in the Oxford County and Androsoggin County Field. In Sagadahoc County, Li- or Cs-enriched LCT granite pegmatites are uncommon and there are some NYF pegmatites, present. Additional granite pegmatites occur in Cumberland County and scattered in other areas. Additional deposits include small generally low-grade lead-zinc-copper sulfide deposits along the coastal region with a few important sulfide deposits in the eastern part of the coastal region and several larger high-grade deposits in the north central part of the state ranging from Oxford, Franklin, Somerset, Piscataquis, and Aroostook Counties. Large low-grade manganese silicate deposits are present in Aroostook County. Granite quarries are widespread in the southern portion of the State including coastal regions. High grade slate is still quarried in the Monson District. Lime-grade marble is still quarried in the Thomaston District. Much of the State is composed of metamorphic and plutonic igneous rocks, with relatively few sedimentary rocks.

Maine towns and similar lands are all named. Formal local governments range from towns and cities with local jurisdiction to plantations and township which have State oversight. Many townships have numerical and acronym abbreviations. Surveying of townships occurred sporadically and grid systems were developed as "wild land" was offered for sale. The grids are township and ranges, abbreviated "T" and "R". Due to the historical need for surveyed land, townships were re-named as needed, each survey frequently having T1 R1 as the starting point, although a few townships were named alphabetically. Usually, townships were quickly organized and residents applied for local self-government and each town received a new name. Townships that did not have sufficient population to establish a local government remained unorganized. The resulting series of surveys left many pieces of land with similar township and range designations. Suffixes were developed to distinguish these otherwise duplicating designations. One of the wealthiest men in the USA, William Bingham, who was also an important financier of the American Revolution, invested a great deal of money in Maine lands, as did his brother-in-law, Alexander Baring. Because Bingham owned so much of Maine, about 11% at one time, the townships were coded according to their location. BPP indicated "Bingham's Penobscot Purchase", while BKP indicated "Bingham's Kennebec Purchase". Additional abbreviations, EKR and WKR, mean "East of the Kennebec River" and "West of the Kennebec River". As Bingham's lands were among the first in Maine to be surveyed into new townships, subsequent surveyors based their work on that of previous surveyors, designations such as WBKP or NBKP were used by Maine to indicate "West of Bingham's Kennebec Purchase" or "North of Bingham's Kennebec Purchase", while NBPP indicates "North of Bingham's Penobscot Purchase". Additional abbreviations include ED, MD, ND, and SD, signifying compass directions - East, North, South or "Middle" and "Division": used when there was a need to be more specific regarding a large tract of land with difficult to code townships. NWP signifies land "North of the Waldo Patent" - a piece of land owned by Revolutionary War General Samuel Waldo. A few townships remain from the Titcomb Survey and are designated TS. A few townships were grants to aid some cause, usually a school, Bowdoin College, Days Academy, etc., although canal grants were intended to help finance public works canal projects to improve commercial transportation. By far. most of the townships have the suffix WELS - "West of the Easterly Line of the State", which merely indicates the North-South surveyed border between Maine and New Brunswick.

Mindat Articles

Melting of Sedimentary Rock: A Key to Pegmatite Diversity in Maine by Douglas Watts
Pegmatites: How to Locate a New Mineral Rich Locality by Gary Powell


Mineral List

Mineral list contains entries from the region specified including sub-localities

Acanthite

Actinolite

Aegirine

Aegirine-augite

Aenigmatite

Albite

var: Andesine

var: Cleavelandite

var: Oligoclase

var: Peristerite

var: Zygadite

'Albite-Anorthite Series'

Allanite-(Ce)

Allophane

Almandine

'Almandine-Spessartine Series'

Amblygonite

var: Hebronite

'Amphibole Supergroup'

'var: Uralite'

Analcime

Anatase

Andalusite

var: Chiastolite

Andradite

Anglesite

Anhydrite

Ankerite

Annite

Anorthite

var: Bytownite

var: Labradorite

'Anorthoclase'

Anthophyllite

Antigorite

var: Bowenite

'Apatite'

'var: Carbonate-rich Apatite'

'var: Collophane'

Aragonite

Arfvedsonite

Arsenopyrite

'Asbestos'

'var: Mountain Leather'

Astrophyllite

Augelite

Augite

var: Ferroaugite

var: Titanian Augite

Aurichalcite

Autunite

Axinite-(Fe)

'Axinite Group'

Azurite

Babingtonite

Barroisite

Baryte

Bavenite

Beidellite

Bementite

Beraunite

Berlinite

Bermanite

Berthierine

Bertrandite

Beryl

var: Aquamarine

var: Caesium Beryl (FRL)

var: Goshenite

var: Heliodor

var: Morganite

Beryllonite (TL)

Beudantite

'Biotite'

Birnessite

Bismuth

Bismuthinite

Bismutite

Bornite

Boulangerite

Bournonite

Braunite

Brazilianite

Brochantite

Brookite

Calcite

var: Iceland Spar

Cancrinite

Carminite

Cassiterite

Cerussite

Chalcocite

Chalcophyllite

Chalcopyrite

Chamosite

var: Daphnite

'Chamosite-Clinochlore Series'

Childrenite

'Chlorite Group'

Chromite

Chrysoberyl

Chrysocolla

Chrysotile

'Cimolite'

Clinochlore

var: Pennine

Clinochrysotile

Clinozoisite

'Columbite'

Columbite-(Fe)

'Columbite-(Fe)-Columbite-(Mn) Series'

Columbite-(Mn)

'Columbite-(Mn)-Tantalite-(Mn) Series'

'Columbite-Tantalite'

Cookeite (TL)

Copiapite

Copper

Cordierite

Correianevesite

Corundum

Covellite

Crandallite

Cryptomelane

Cubanite

Cummingtonite

Cuprite

'Cymatolite'

'Cyrtolite'

Darrellhenryite

Datolite

'Deweylite'

Diadochite

Diaspore

Dickinsonite-(KMnNa)

Diopside

var: Diallage

'Diopside-Hedenbergite Series'

Dolomite

Dravite

Dumortierite

Earlshannonite

Edenite

Elbaite

Eleonorite

Enargite

Enstatite

var: Bronzite

Eosphorite

Epidote

Euclase

Fairfieldite

Falsterite

Fayalite

'Feldspar Group'

'var: Perthite'

'var: Sunstone'

Ferberite

Fergusonite-(Y)

Ferrimolybdite

Ferrisicklerite

Ferro-edenite

Ferro-hornblende

Ferro-pargasite

Ferrosilite

Ferrostrunzite

Fluorapatite

var: Carbonate-rich Fluorapatite

var: Manganapatite

var: Mn-bearing Fluorapatite

Fluor-elbaite

Fluorite

Fluornatromicrolite

Fluor-schorl

Foitite

Forsterite

Fourmarierite

Gahnite

Gainesite (TL)

Galena

var: Argentiferous Galena

Ganophyllite

'Garnet'

Gedrite

Gersdorffite

Gibbsite

Glucine

Goethite

Gold

Gorceixite

Goyazite

Graftonite

Graphite

Grayite

Greenockite

Greifensteinite

Grossular

var: Hessonite

Grunerite

'Gummite'

Gypsum

Halite

'Halloysite'

Halloysite-7Å

Hausmannite

Hedenbergite

Hematite

var: Specularite

Hemimorphite

Hercynite

Heterosite

'Heterosite-Purpurite Series'

Hisingerite

Holmquistite

'Hornblende'

Humite

Hureaulite

Hurlbutite

'Hydronephelite'

Hydroxylapatite

var: Carbonate-rich Hydroxylapatite

Hydroxylherderite

Hydrozincite

'Hypersthene'

Ice

'Iddingsite'

Ilmenite

Ishikawaite

'Jahnsite'

Jahnsite-(CaMnFe)

Jahnsite-(CaMnMn)

Jahnsite-(MnMnMn)

Kaersutite

Kainosite-(Y)

Kamphaugite-(Y)

Kaolinite

Kasolite

Kastningite

'Kerolite'

'K Feldspar'

'var: Adularia'

Kosnarite (TL)

Kyanite

Lacroixite

Landesite (TL)

Laueite

Laumontite

Lazulite

Lepidocrocite

'Lepidolite'

Leucophosphite

Leucoxene

'Limonite'

Linarite

Linnaeite

Lithiophilite

Lizardite

Löllingite

Ludlamite

Mackinawite

Magnesio-hornblende

Magnesite

Magnetite

Malachite

'Manganese Oxides'

'var: Manganese Dendrites'

Mangangordonite (TL)

Manganocummingtonite

Marcasite

Margarite

Marialite

Mccrillisite (TL)

Meionite

Melanterite

Messelite

Meta-autunite

Metaschoepite

Metastibnite

Metaswitzerite

Metatorbernite

Metauranospinite

Metavanmeersscheite

'Mica Group'

Microcline

var: Amazonite

Microlite Group

Milarite

Mimetite

Mitridatite

Molybdenite

Monazite-(Ce)

Montebrasite

Montmorillonite

Moraesite

Muscovite

var: Damourite

var: Fuchsite

var: Illite

var: Lithian Muscovite

var: Phengite

var: Schernikite

var: Sericite

Natrolite

Neotocite

Nepheline

var: Eleolite

Nickeline

'Nickel-iron'

Niggliite

Nontronite

Nsutite

'Olivine'

Opal

var: Opal-AN

Orthoclase

Oxy-schorl

Pargasite

Pentlandite

Perhamite (TL)

Petalite

Pharmacosiderite

Phenakite

Phlogopite

Phosphoferrite

Phosphophyllite

Phosphosiderite

Phosphuranylite

Pigeonite

'Pinite'

'Pisolite'

Platinum

Pollucite

Powellite

Prehnite

Pseudolaueite

Pumpellyite-(Fe2+)

Pumpellyite-(Mg)

Purpurite

Pyrite

var: Bravoite

Pyromorphite

Pyrophanite

Pyrophyllite

'Pyroxene Group'

Pyrrhotite

var: Nickeloan Pyrrhotite

Quartz

var: Agate

var: Amethyst

var: Bloodstone

var: Blue Quartz

var: Carnelian

var: Chalcedony

var: Citrine

var: Milky Quartz

var: Pseudocubic Quartz

var: Rock Crystal

var: Rose Quartz

var: Rutilated Quartz

var: Sceptre Quartz

var: Smoky Quartz

Rammelsbergite

Realgar

Reddingite

Rhodochrosite

Rhodonite

Riebeckite

Robertsite

Rockbridgeite

Rosasite

Roscherite

Rossmanite

Rutherfordine

Rutile

var: Ilmenorutile

Safflorite

Sanidine

Saponite

'Scapolite'

Schafarzikite

Scheelite

Schoepite

Schoonerite

Schorl

Scolecite

Scorodite

Scorzalite

Sekaninaite

'Serpentine Subgroup'

'var: Retinalite'

Serpierite

Siderite

Sillimanite

var: Fibrolite

Silver

Smithsonite

Sodalite

Souzalite

Sperrylite

Spessartine

Sphalerite

var: Marmatite

Spinel

Spodumene

var: Kunzite

Stannite

Staurolite

Stellerite

Stevensite

Stewartite

Stibiotantalite

Stibnite

'Stilbite'

Stilbite-Ca

Stilpnomelane

Strengite

Strunzite

'Strunzite Group'

Sulphur

Switzerite

Talc

var: Steatite

Tantalite-(Fe)

Tantalite-(Mn)

'Tapiolite'

Tapiolite-(Fe)

Tapiolite-(Mn)

Tennantite

Tenorite

Tetradymite

Thorianite

'Thorogummite'

Titanite

Todorokite

Topaz

Torbernite

Tosudite

var: Lithium Tosudite

'Tourmaline'

'var: Achroite'

'var: Indicolite'

'var: Rubellite'

'var: Verdelite'

'var: Watermelon Tourmaline'

Tremolite

Tridymite

Triphylite

Triplite

Triploidite

Troilite

'Turgite'

Ulvöspinel

'UM1956-01-O:HPbU'

'Unnamed (Ca-analogue of Zigrasite)'

Uralolite

Uraninite

var: Pitchblende

Uranophane

Uranophane-β

Ushkovite

Uvarovite

Vaesite

Valentinite

Valleriite

Vandendriesscheite

Vanmeersscheite

Väyrynenite

Vesuvianite

Violarite

Vivianite

Wagnerite

Walentaite

Wardite

Whitlockite

Whitmoreite

Wodginite

'Wolframite'

Wollastonite

Wölsendorfite

Wulfenite

Wurtzite

Xanthoxenite

Xenotime-(Y)

Zanazziite

Zigrasite (TL)

'Zinnwaldite'

Zircon

Zoisite


359 valid minerals. 9 (TL) - type locality of valid minerals. 1 (FRL) - first recorded locality of unapproved mineral/variety/etc.

Rock Types Recorded

Entries shown in red are rocks recorded for this region.

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities


Localities in this Region


The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Bastin, Edson Sunderland (1911) Geology of the pegmatites and associated rocks of Maine, including feldspar, quartz, mica, and gem deposits. USGS Bulletin 445.

King, V. and Foord, E. (1994), Mineralogy of Maine, Volume 1.

King, V. and Foord, E. (2000), Mineralogy of Maine, Volume 2.

King, V. (2009), Maine Feldspar, Families, and Feuds.

New detailed Mineralogy of Oxford County, Maine (in progress).

Mineral and/or Locality  
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