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Bancroft area (Bancroft district), Ontario, Canada

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Location is approximate, based on center of defined region.
 
Latitude & Longitude (WGS84): 45° 3' 23'' North , 77° 51' 18'' West
Latitude & Longitude (decimal): 45.05639,-77.85500
Museums in region:


There is no official designation of a “Bancroft area”, or district, that has any relevance. It has different definitions, and highly variable boundaries, depending of whom you ask. This page is intended only as a repository for photos of specimens for which there is no more detailed locality info available than “Bancroft” or something of the like. If you have any more specific information about a specimen, or a location (such as a mine name), please add it under the appropriate township or regional municipality, and not here.

There are a limited number of occurrences which could rightly be considered to be within the limits of the Town of Bancroft (for which there are separate locality pages under: http://www.mindat.org/loc-530.html, but the name has long been erroneously applied to occurrences within a large geographical area including parts of at least three different counties. This has lead to much confusion (and perhaps a certain amount of laziness) when it comes to labeling specimens and recording locality data for the region.

Guidebooks for the region (many of which are self-published) can also vary greatly in the amount and quality of information they contain. The most complete and authoritative guide for the region is Sabina's "Rocks & Minerals for the Collector" (referenced below), which includes scientifically identified species or group names, although the on-going reorganization of regional municipalities has created an information gap regarding which former town or township belongs to newly created regional municipalities.

Mineralised deposits are found in a wide variety of environments including: mafic rocks, contact metamorphic zones, marbles, calcite veins, syenites, granite pegmatites, nepheline syenites, etc.

For more information please see the article below.

Mindat Articles

So What is the "Bancroft Area", or "District? by Michael J. Bainbridge


Mineral List

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

Actinolite

'Actinolite-Tremolite Series'

Aegirine

Aeschynite-(Ce)

Aeschynite-(Y)

Albite

var: Andesine

var: Cleavelandite

var: Oligoclase

var: Peristerite

'Albite-Anorthite Series'

Allanite-(Ce)

'Allanite Group'

Allanite-(Y)

Almandine

'Almandine-Spessartine Series'

Amphibole Supergroup

Analcime

Anatase

'Ancylite'

Ancylite-(Ce)

Andradite

Anhydrite

Annite

Anorthite

var: Bytownite

Anthophyllite

'Apatite'

'var: Trillium'

'Apophyllite'

Aragonite

Arfvedsonite

Arsenic

Arsenopyrite

Augite

'Bakerite'

Baryte

'Bastnäsite'

Bertrandite

Beryl

var: Aquamarine

'Biotite'

Bismite

Bismuthinite

Bismutite

Böhmite

Bornite

Brucite

Brugnatellite

Calciosamarskite (TL)

Calcite

Cancrinite

Celestine

Cerianite-(Ce)

'Chabazite'

Chabazite-Ca

Chalcocite

Chalcopyrite

Chamosite

'Chlorite Group'

Chondrodite

Chrysotile

Clinohumite

'Clinopyroxene Subgroup'

Clinozoisite

Coffinite

Columbite-(Fe)

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

Copper

Cordierite

Corundum

var: Sapphire

Cowlesite

Curite

Datolite

'Davidite'

Davidite-(Ce)

Dawsonite

Diopside

'Diopside-Hedenbergite Series'

Dolomite

Dravite

Edenite

Epidote

Epistilbite

Euxenite-(Y)

'Faujasite Subgroup'

'Fayalite-Forsterite Series'

'Feldspar Group'

'var: Antiperthite'

'var: Perthite'

'Fergusonite'

Fergusonite-(Ce)

Fergusonite-(Y)

Ferriallanite-(Ce)

Ferri-fluoro-katophorite (TL)

'Ferro-ferri-taramite'

Ferro-hornblende

Fluoborite

Fluorapatite

Fluorite

var: Stink-Fluss

Fluoro-richterite

Forsterite

Gadolinite-(Y)

Gahnite

Galena

'Garnet'

Garronite-Ca

Geikielite

'Gismondine'

Goethite

Gold

Gonnardite

Graphite

Grossular

var: Hessonite

'Gummite'

Gypsum

var: Selenite

'Hackmanite'

Harmotome

Hastingsite (TL)

Hematite

'Heulandite'

'Hornblende'

Hydromagnesite

'Hydronephelite'

Hydroxycalciopyrochlore

Hydroxylbastnäsite-(Ce)

Ilmenite

Jarosite

Kainosite-(Y)

Kaolinite

Kasolite

'K Feldspar'

Kyanite

'Labradorite'

Laumontite

'Lepidomelane'

Lokkaite-(Y)

Ludwigite

Magnesio-hornblende

Magnesite

Magnetite

Malachite

'Manganese Oxides'

Marcasite

Marialite

Meionite

Melanocerite-(Ce)

Mesolite

Meta-autunite

Metaschoepite

Metatorbernite

'Mica Group'

Microcline

var: Amazonite

'Microperthite'

Molybdenite

Molybdite

'Monazite'

Monazite-(Ce)

Monticellite

Muscovite

var: Gieseckite

var: Sericite

Natrolite

Nepheline

Nioboaeschynite-(Y) (TL)

Norbergite

Nordstrandite

'Olivine'

Opal

Orpiment

Orthoclase

Periclase

Perovskite

Perrierite-(Ce)

Phenakite

'Phillipsite'

Phlogopite

Polycrase-(Y)

Prehnite

Pyrite

'Pyrochlore'

Pyrochlore Group

Pyrochlore Supergroup

var: Betafite (of Hogarth 1977)

'Pyroxene Group'

Pyrrhotite

Quartz

var: Amethyst

var: Citrine

var: Rose Quartz

var: Smoky Quartz

Realgar

Richterite

Riebeckite

Rozenite

Rutile

var: Strüverite

Samarskite-(Y)

'Scapolite'

'var: Wernerite'

Scheelite

Schoepite

Schorl

Scorodite

Sepiolite

'Serpentine Subgroup'

Sillimanite

Silver

Sinhalite

'Soapstone'

Sodalite

Sphalerite

Spinel

'Stilbite'

Stillwellite-(Ce)

Sulphur

'Sunstone'

Szaibélyite

Talc

Tetraferriannite

'Thomsonite'

Thorianite

Thorite

var: Uranothorite

'Thorogummite'

Titanite

Tochilinite

Torbernite

'Tourmaline'

Tremolite

Tritomite-(Y) (TL)

Umangite

Uraninite

Uranophane

Uranophane-β

'Uranpyrochlore (of Hogarth 1977)'

'Uvite Series'

Vesuvianite

Vigezzite

Warwickite

Wollastonite

Wulfenite

Xenotime-(Y)

Zircon

var: Cyrtolite

Zoisite


177 valid minerals. 5 (TL) - type locality of valid minerals.

Rock Types Recorded

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

Select Rock List Type

Alphabetical List Tree Diagram

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Neoproterozoic - Mesoproterozoic
541 - 1600 Ma



ID: 619918
Mafic to ultramafic plutonic rocks

Age: Proterozoic (541 - 1600 Ma)

Comments: Grenville Province Central Metasedimentary Belt

Lithology: Diorite, gabbro, peridotite, pyroxenite, anorthosite, derived metamorphic rocks

Reference: Ontario Geological Survey. 1:250 000 scale bedrock geology of Ontario. ISBN 978-1-4435-5705-4. Miscellaneous Release–Data 126 - Revision 1. [1]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License


Localities in this Region

Canada
Canada

This page 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

Sabina, Ann P. (1986) Rocks and Minerals for the Collector: Bancroft-Parry Sound Area and Southern Ontario.

Goad, B. E. (1990) Granitic pegmatites of the Bancroft area, southeastern Ontario/ Ontario Geological Survey, Open File Report 5717, 459p.

Mineral and/or Locality  
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