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  • Maine Geological Survey: Metallic Mineral Deposits

    2013-1-24 · The Metallic Mineral Deposits of Maine map (PDF 0.7MB) shows locations of known metallic mineral occurrences on a generalized geologic map of Maine. The information is taken from the Maine Mineral Resources database of the Maine

    Maine Geological Survey: Maine's Mineral Resources

    2 天前 · This view gives a general overview of the mineral commodities important to Maine's economic history. Significant Metal Deposits Prospectors have searched for metals in Maine since the 1800's. During a flurry of excitement in the early 1880's, metal deposits were mined along the coastal volcanic belt from Blue Hill to Lubec.

    Maine Geological Survey: Metallic Mineral Deposits

    2021-3-18 · The Metallic Mineral Deposits of Maine map (PDF 0.7MB) shows locations of known metallic mineral occurrences on a generalized geologic map of Maine. The information is taken from the Maine Mineral Resources database of the Maine Geological Survey. That database includes more information about the occurrences that are shown on the map, and also includes many non-metallic mineral

    Maine Geological Survey: Maine's Mineral Resources

    Maine Mineral Resources Data System This database was produced by the Maine Geological Survey in 2009. It was derived from the U.S. Geological Survey's Mineral Resources Data System (MRDS). MRDS is a worldwide database of mineral site records with related geologic, commodity, and deposit information. The USGS data were combined with records

    Significant Known Metallic Mineral Deposits in Maine

    2021-3-18 · Significant Known Metallic Mineral Deposits in Maine including approximate tonnage and grade1 Northern Maine belt (in alphabetical order) *Alder Pond 3.4 MT massive sulfide, of which 0.8 MT grades 2-3% copper, 9-17% zinc, 0.5-1.0% lead, and 3-6 oz/ton silver. Advanced exploration permit issued by DEP to

    Maine Geological Survey: A Collector's Guide

    2005-10-6 · Alluvial mineral deposits, also known as placers, are those which occur in sand and gravel laid down by running water. "Alluvium" includes both modern stream sediments and those deposited during relatively recent geologic time (as opposed to the older, indurated sedimentary rocks). The alluvial deposits of most interest in Maine

    Mining and Quarrying in Maine: Explore Maine

    Metallic Mineral Deposits of Maine (map) Known occurrences of metallic minerals shown on a generalized geologic map of Maine. Locations of ten "significant" deposits also shown. For more information, see Maine's Mineral Resources database. Maine's

    Interactive map of mineral resources in Maine

    2021-6-14 · The Maine Geological Survey's interactive map provides a range of mineral resource information for the state of Maine. The map allows users to explore Maine's significant mineral commodities, mineral deposits, selected historical mines, and more.

    "Overview of Maine Metallic Mineral Deposits and

    2015-1-1 · Topical Reports on Maine Bedrock Geology; Mineral Resources and Mining Reports Recommended Citation Marvinney, Robert G., 2015, Overview of Maine Metallic Mineral Deposits and Mining: Maine

    Maine Geological Survey: Mining and Quarrying

    Much of the sand and gravel used for construction purposes in Maine was deposited by water melted from glaciers. If possible, water runs downhill so most gravel deposits are found in valleys and other lowlands where they were laid down in glacial outwash streams, glacial lakes, or the ocean. Ice-tunnel deposits (eskers) are notable exceptions.

    Metallic Mineral Deposits in Maine NRCM

    Very large deposits of volcanic and sedimentary rocks (shown in yellow) are spread throughout the state. Volcanic and sedimentary deposits often hold massive sulfide deposits, which are what open pit mining companies will be looking for in Maine. These metallic mineral deposits are located near some of Maine’s most precious natural areas,

    "Overview of Maine Metallic Mineral Deposits and

    2015-1-1 · Topical Reports on Maine Bedrock Geology; Mineral Resources and Mining Reports Recommended Citation Marvinney, Robert G., 2015, Overview of Maine Metallic Mineral Deposits and Mining: Maine Geological Survey, Circular 15-9, 10 p..

    Rare Gems and Minerals in Maine Mining Locations

    New deposits can also be found by searching for pegmatite outcrops in the known mineral producing areas. Although mineral collecting is prohibited within Maine State Parks, many lands are open to casual prospecting for minerals.

    Maine Geological Survey: Mining and Quarrying

    2016-2-29 · Tourmaline is the official State Mineral of Maine, and the most valuable and highly sought-after gem material that can be found here. Gem tourmaline has been mined in Maine since the 1820's, and the oldest location (Mt. Mica in Paris Hill) is still producing today. Tourmaline is actually a group of minerals having various colors and compositions.

    The Maine Mineral & Gem Museum Down East

    By the early 1900s, large feldspar deposits had been found in western Maine, and the state was the country’s biggest source of the stuff. Other earthly materials had commercial value too. Mica, a mineral resistant to both heat and conduction, went into industrial

    Maine USGS

    2 天前 · Maine. Maine is the northernmost and least densely populated state in the contiguous United States east of the Great Lakes. It is known for its jagged rocky coastline; low rolling mountains; heavily forested interior and picturesque waterways. Geologists describe this type of landscape as a "drowned coast", where a rising sea level has invaded

    Maine Gemstones: tourmaline, amethyst, aquamarine,

    2 天前 · Other Maine Gems. In addition to tourmaline and quartz, the pegmatite deposits of Maine have produced aquamarine, morganite, chrysoberyl, lepidolite, spodumene, and topaz. Garnet, kyanite, andalusite, sodalite, and staurolite have been produced from the metamorphic rocks of Maine. More Gemstones. Birthstones.

    Lithochronologic Units and Mineral Deposits of the

    The mineral deposits were compiled in the early 1980s by a group of economic geologists within the USGS Eastern Mineral Resources Branch. These geologists included deposits that were of significant size and economic importance, but also included small deposits which represented the metallogenic character of the Appalachians.

    Maine Pegmatites Mineralogical Society of America

    The granite pegmatites of central Maine have been described in some detail by Bastin. 1 The present paper presents the results of a more detailed investigation of two recently opened deposits and some additional facts concerning some of the better known localities. Recent feldspar quarrying operations at Buckfield, in Oxford County, have

    Mineral Deposits Lindgren Mining Books

    1933. This is an original Waldemar Lindgren text on mineral deposits. The author is one of the most reknowned mining geologists of our time. His books are referenced and on the shelf of mining geologists world wide today. Contents/Chapters:

    Rare Gems and Minerals in Maine Mining Locations

    New deposits can also be found by searching for pegmatite outcrops in the known mineral producing areas. Although mineral collecting is prohibited within Maine State Parks, many lands are open to casual prospecting for minerals.

    Metallic Mineral Deposits in Maine NRCM

    Very large deposits of volcanic and sedimentary rocks (shown in yellow) are spread throughout the state. Volcanic and sedimentary deposits often hold massive sulfide deposits, which are what open pit mining companies will be looking for in Maine. These metallic mineral deposits are located near some of Maine’s most precious natural areas,

    Maine Geological Survey: Mining and Quarrying

    2016-2-29 · Tourmaline is the official State Mineral of Maine, and the most valuable and highly sought-after gem material that can be found here. Gem tourmaline has been mined in Maine since the 1820's, and the oldest location (Mt. Mica in Paris Hill) is still producing today. Tourmaline is actually a group of minerals having various colors and compositions.

    Maine Gemstones: tourmaline, amethyst, aquamarine,

    2 天前 · Other Maine Gems. In addition to tourmaline and quartz, the pegmatite deposits of Maine have produced aquamarine, morganite, chrysoberyl, lepidolite, spodumene, and topaz. Garnet, kyanite, andalusite, sodalite, and staurolite have been produced from the metamorphic rocks of Maine. More Gemstones. Birthstones.

    The Maine Mineral & Gem Museum Down East

    By the early 1900s, large feldspar deposits had been found in western Maine, and the state was the country’s biggest source of the stuff. Other earthly materials had commercial value too. Mica, a mineral resistant to both heat and conduction, went into industrial

    Maine Pegmatites Mineralogical Society of America

    The granite pegmatites of central Maine have been described in some detail by Bastin. 1 The present paper presents the results of a more detailed investigation of two recently opened deposits and some additional facts concerning some of the better known localities. Recent feldspar quarrying operations at Buckfield, in Oxford County, have

    Metallic Mineral Mining in Maine Digital Commons

    2020-10-13 · Maine has had a consistent history of general mining since the 1800s, but metallic mineral mining has not been a major part of industrial mining in the state (Lepage et al. 1990, Beck 2012). There has been no metal mining in Maine since 1977 (Maine Geological Survey 2005). However, metallic mineral mining became a major point of contention in Maine

    A Location Guide for Rock Hounds in the United States

    2006-2-5 · deposits⎯Manganese minerals and Rhodonite; e Buzzard Cr. and tributaries⎯Chlorite and green Quartz; f Pyriton Dist. (stretching 17 mi. NE to SW, many mica and gold mines in hills W of Rte. 9, reached only by rough roads) ⎯Beryl, Feldspar crystals, Muscovite mica, Quartz, etc.

    Mineral Deposits Lindgren Mining Books

    1933. This is an original Waldemar Lindgren text on mineral deposits. The author is one of the most reknowned mining geologists of our time. His books are referenced and on the shelf of mining geologists world wide today. Contents/Chapters:

    Malachite: Mineral information, data and localities.

    Malachite is a green, very common secondary copper mineral with a widely variable habit. Typically it is found as crystalline aggregates or crusts, often banded in appearance, like agates. It is also often found as botryoidal clusters of radiating crystals, and as mammillary aggregates as well. Single crystals and clusters of distinguishable

    Rare Gems and Minerals in Maine Mining Locations

    New deposits can also be found by searching for pegmatite outcrops in the known mineral producing areas. Although mineral collecting is prohibited within Maine State Parks, many lands are open to casual prospecting for minerals.

    Maine Gemstones: tourmaline, amethyst, aquamarine,

    2 天前 · Other Maine Gems. In addition to tourmaline and quartz, the pegmatite deposits of Maine have produced aquamarine, morganite, chrysoberyl, lepidolite, spodumene, and topaz. Garnet, kyanite, andalusite, sodalite, and staurolite have been produced from the metamorphic rocks of Maine. More Gemstones. Birthstones.

    The Maine Mineral & Gem Museum Down East

    By the early 1900s, large feldspar deposits had been found in western Maine, and the state was the country’s biggest source of the stuff. Other earthly materials had commercial value too. Mica, a mineral resistant to both heat and conduction, went into industrial

    Mineral Identification Maine Mineralogy

    There many varieties of this common mineral family. Granitic pegmatites have two feldspars plus a mix of the two: (1.) Sodium rich (Na) feldspar called Albite is usually found around mineral pockets. In pegmatites featuring colored tourmalines albite may be in a bladed form called Cleavelandite.Pegmatites that do not contain colored tourmaline may feature a blocky rather than bladed albite.

    Metallic Mineral Mining in Maine Digital Commons

    2020-10-13 · Maine has had a consistent history of general mining since the 1800s, but metallic mineral mining has not been a major part of industrial mining in the state (Lepage et al. 1990, Beck 2012). There has been no metal mining in Maine since 1977 (Maine Geological Survey 2005). However, metallic mineral mining became a major point of contention in Maine

    Risk Perceptions of Metallic Mineral Mining in Maine

    2018-6-29 · As society’s need for metals increases more mining locations will likely be sought. Maine contains 10 known significant metal deposits but there are currently no active metal mines. Interest in developing one of these deposits prompted legislative changes to the metallic mineral mining (MMM) law and rules to be pursued.

    Consult geologist who found mineral deposits

    2013-6-29 · Cummings discovered the Bald Mountain mineral deposits in 1977. On Jan. 7, 1980, the Maine Legislature recognized him for his discovery of the Bald Mountain deposit, which is

    Beryl from Maine, USA

    Maine; Androscoggin Co. Auburn; East Mount Apatite Mining District ⓘ Greenlaw Quarry [var. Morganite] King & Foord, 1994.Mineralogy of Maine, V.1. ⓘ Hatch Farm prospect Mineralogy of Maine, Vol 2, by Maine Geological Survey, edited by V. King, pages 142 145.

    A Location Guide for Rock Hounds in the United States

    2006-2-5 · deposits⎯Manganese minerals and Rhodonite; e Buzzard Cr. and tributaries⎯Chlorite and green Quartz; f Pyriton Dist. (stretching 17 mi. NE to SW, many mica and gold mines in hills W of Rte. 9, reached only by rough roads) ⎯Beryl, Feldspar crystals, Muscovite mica, Quartz, etc.

    Malachite: Mineral information, data and localities.

    Malachite is a green, very common secondary copper mineral with a widely variable habit. Typically it is found as crystalline aggregates or crusts, often banded in appearance, like agates. It is also often found as botryoidal clusters of radiating crystals, and as mammillary aggregates as well. Single crystals and clusters of distinguishable

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