maine’s geology and...a brief word on plate tectonics geology of maine and new brunswick hibbard...
TRANSCRIPT
![Page 1: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/1.jpg)
Robert G. Marvinney State Geologist
Maine Geological Survey Dept Agriculture, Conservation and Forestry
Maine’s Geology and
Mineral Potential
November 9, 2012 Geological Society of Maine
![Page 2: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/2.jpg)
Presentation Overview
Maine Geological Survey – who we are
Our place in the Northern Appalachians
Overview of Maine Geology
Important Mineral Discoveries
Types and Associations
Assistance from the Maine Geological Survey
![Page 3: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/3.jpg)
Within the Department of Agriculture, Conservation and
Forestry, one of several Natural Resources departments in
Maine government
Programs in
Bedrock mapping
Surficial mapping
Groundwater resources characterization
Coastal/marine geology.
Hazards
Maine Geological Survey
![Page 4: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/4.jpg)
Bedrock
and
Surficial
mapping
projects
![Page 5: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/5.jpg)
Northern Appalachians
![Page 6: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/6.jpg)
Northern Appalachian Terranes
Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen
![Page 7: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/7.jpg)
A Brief Word on Plate Tectonics
![Page 8: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/8.jpg)
Geology of Maine and New Brunswick
Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen
![Page 9: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/9.jpg)
Significant
Mineral Deposits
Bald Mountain: 30 MT
Cu, Zn, Au, Ag
Alder Pond: 3 MT Zn,
Cu, Pb, Ag
Warren Nickel
Harborside and Second
Lake: Mined in the
1970s
![Page 10: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/10.jpg)
Tectonic Settings of Metal Deposits
From Skinner and Porter, 1987
![Page 11: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/11.jpg)
Tectonic Settings of Metal Deposits
![Page 12: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/12.jpg)
Hydrothermal Vents
![Page 13: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/13.jpg)
Porphyry Cu/Mo
Late stage of
granite intrusion
with extensive
fracture system
above cooling
magma.
![Page 14: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/14.jpg)
Significant
Mineral Deposits
Commodity:
Base Metals
Cu, Pb, Zn, Fe, Ni,
(Mn)
![Page 15: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/15.jpg)
Significant
Mineral Deposits
Commodity:
Precious Metals
(Au, Ag)
![Page 16: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/16.jpg)
Significant
Mineral Deposits
Maine’s geology hosts
a variety of genetic
mineral deposit
types.
![Page 17: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/17.jpg)
Maine Minerals Information on the Web
![Page 18: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/18.jpg)
Significant Mineral Deposits
Google: Maine
Geological Survey
![Page 19: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/19.jpg)
Significant Mineral Deposits
Google: Maine
Geological Survey Scanned Core Records
in Google Earth
![Page 20: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/20.jpg)
Resources:
Geologists knowledgeable about Maine’s mineral
resources.
Geologic maps and reports.
Core facility – hundreds of core and logs from past
exploration.
Assistance:
Guidance on land ownership.
Listing of consulting geologists in Maine.
Contact information for regulatory agencies.
Maine Geological Survey
![Page 21: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/21.jpg)
Current Activities:
Geologic mapping – bedrock and surficial.
Groundwater investigations.
Geologic hazards.
Future Activities:
Web-accessible core logs.
Statewide airborne geophysical survey.
Maine Geological Survey
![Page 22: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/22.jpg)
Exploration
History
Basic geologic
mapping 1837-1950
identified coastal
base metal deposits.
1950s-1960s:
Government-funded
airborne geophysical
surveys identified
prospective areas.
1970s-1980s: Privately
funded exploration
in northern volcanic
belts.
![Page 23: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/23.jpg)
Geology
Many diverse geologic environments.
Igneous and Volcanic terranes that may host a
variety of deposits.
Metal deposits
Numerous mineral occurrences.
Several well-characterized deposits.
Opportunities for undiscovered resources.
Summary
![Page 24: Maine’s Geology and...A Brief Word on Plate Tectonics Geology of Maine and New Brunswick Hibbard and others, 2006, Lithotectonic map of the Appalachian orogen Significant Mineral](https://reader033.vdocuments.mx/reader033/viewer/2022042711/5f8667ad1b162e5c4966ecc1/html5/thumbnails/24.jpg)
Prospecting in Maine