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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
'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: Titanian Augite
Aurichalcite
Autunite
Axinite-(Fe)
'Axinite Group'
Azurite
Babingtonite
Barroisite
Baryte
Bavenite
Beidellite
Bementite
Beraunite
Berlinite
Bermanite
Bertrandite
Beryl
var: Aquamarine
var: Goshenite
var: Heliodor
var: Morganite
Beryllonite (TL)
β-Uranophane
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'
'Chert'
Childrenite
'Chlorite Group'
Chromite
Chrysoberyl
Chrysocolla
Chrysotile
'Cimolite'
Clinochlore
var: Pennine
Clinochrysotile
Clinozoisite
'Columbite'
Columbite-(Fe)
Columbite-(Mn)
'Columbite-(Mn)-Tantalite-(Mn) Series'
'Columbite-Tantalite'
Cookeite (TL)
Copiapite
Copper
Cordierite
Correianevesite
Corundum
Covellite
Crandallite
Cryptomelane
Cubanite
Cummingtonite
Cuprite
'Cymatolite'
'Dahllite'
Datolite
'Deweylite'
Diadochite
Diaspore
Dickinsonite-(KMnNa)
Diopside
var: Diallage
'Diopside-Hedenbergite Series'
Dolomite
Dravite
Dumortierite
Earlshannonite
Edenite
Elbaite
Enargite
Enstatite
var: Bronzite
Eosphorite
Epidote
Euclase
Fairfieldite
Falsterite
Fayalite
'Feldspar Group'
'var: Sunstone'
Ferberite
Fergusonite-(Y)
Ferrimolybdite
Ferrisicklerite
Ferro-edenite
Ferro-hornblende
Ferro-pargasite
Ferrosilite
Ferrostrunzite
Fluorapatite
var: Carbonate-rich Fluorapatite
var: Mn-bearing Fluorapatite
Fluorite
Fluornatromicrolite
Foitite
Forsterite
Fourmarierite
Gahnite
Gainesite (TL)
Galena
var: Argentiferous Galena
Ganophyllite
'Garnet'
Gedrite
Gehlenite
Gersdorffite
Gibbsite
Glucine
Goethite
Gold
Gorceixite
Goyazite
Graftonite
Graphite
Grayite
Greenockite
Greifensteinite
Grossular
var: Hessonite
Grunerite
'Gummite'
Gypsum
Halite
'Halloysite'
Halloysite-7Å
Hausmannite
Hematite
var: Specularite
Hemimorphite
Hercynite
Herderite
Heterosite
'Heterosite-Purpurite Series'
'Heulandite'
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
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
Pargasite
Pentlandite
Perhamite (TL)
'Perthite'
Petalite
Pharmacosiderite
Phenakite
Phlogopite
Phosphoferrite
Phosphophyllite
Phosphosiderite
Phosphuranylite
Pigeonite
'Pinite'
'Pisolite'
Platinum
Pollucite
Powellite
Prehnite
Pseudolaueite
Pumpellyite-(Fe2+)
Pumpellyite-(Mg)
Purpurite
Pyrite
var: Bravoite
Pyrolusite
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: Jasper
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 Group'
'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
Triphylite
Triplite
Triploidite
'Turgite'
Ulvöspinel
'Unnamed (Ca-analogue of Zigrasite)'
Uralolite
Uraninite
var: Pitchblende
Uranophane
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
var: Cyrtolite
Zoisite


573 entries listed. 353 valid minerals. 9 type localities (valid minerals).

Localities in this Region

USA
USA

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).

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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