Brookfield Lead Mine
Brookfield, Connecticut
41.4697°N 73.4064°W
Mine Overview
The Brookfield Lead Mine is near Brookfield, Connecticut. Historically the site has been part of the Brookfield Mining District. The Brookfield Lead Mine was closed at the time of data entry with no known plans to re-open. Production size when active was considered to be small. The ore mined is composed of galena and sphalerite with waste material consisting primarily of dolomite, phlogopite and calcite. Associated rock in this area is granite from the Lower Devonian epoch 419.20 to 393.30 million years ago. The New England Upland Section of the Appalachian Highlands characterize the geomorphology of the surrounding area.
Site identification and general characteristics. Learn about USGS mines.
Brookfield Lead Mine Near Brookfield, Connecticut
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Commodities
Additional textual information about a site or mine.
- Commodity Type Importance
- Lead Metallic Primary
- Sulfur Non-Metallic Primary
- Zinc Metallic Primary
Deposit
USGS, GEOCHEM. SAMPLE CONTROL FILES, JOB NO. HM 3336, SAMPLE TAG NO. BCT 200 AND BCT 201 SUBMITTED BY R. WEEKS.; INFORMATION SOURCE: 1 PUB LIT.
USGS, GEOCHEM. SAMPLE CONTROL FILES, JOB NO. HM 3336, SAMPLE TAG NO. BCT 200 AND BCT 201 SUBMITTED BY R. WEEKS.; INFORMATION SOURCE: 1 PUB LIT.
USGS GSC ID # LISTS TWO # W001016 & # W100450:.
Location Info
- Fairfield , Connecticut County / State
- Continent Country State County
- North America The United States Connecticut Fairfield
Development
TOTAL$: US
Rocks
Geological materials at the site.
- Class? 1st Order Name? 2nd Order Name? 3rd Order Name? 4th Order Name? Most Specific Name? Begin Time End Time Description?
- Associated Rock Plutonic Rock Granitoid Granite - Granite Lower Devonian Lower Devonian -
- Host Rock Metamorphic Rock Metasedimentary Rock Marble - Marble - - -
- Mineralization - - - - - Upper Ordovician Upper Ordovician -
Physiography
Physiographic area where the resource is found.
- Division Province? Section
- Appalachian Highlands New England Province New England Upland Section
Analytical Data
Results of chemical or mineralogical analysis on materials at or near the site
- Line? Analysis Data?
- 1 CHEMICAL ANALYSES OF SOUTH PIT ORE SAMPLE TAG NO. BCT 200 GIVES (IN PERCENT): 0.7 IRON, 0.03 MG, 0.01 TL, AND IN PARTS PER MILLION: 1.5 SILVER, 50 BA, GT 1000 BI, 15 COPPER, 5 NICKEL, AND AT LOWER LIMIT OF DETECTION: CA, MN, BE, CO, CR, LEAD, SC, V, Y, ZR, NOT DETECTED WERE AS, GOLD, LA, MO, NB, SB, SN, SR, W, AND ZN. FOR ORE SAMPLE FROM NORTH PIT TAG NO. BCT 201 GIVES (IN PERCENT): 1.0 IRON, 10 MG, 20 CA, 0.07 TI, AND IN PARTS PER MILLION: 150 MN, 100 BA, 20 CR, 7 COPPER, 5 MO, 10 NICKEL, 100 SR, 10 V, 300 ZINC, 20 ZR, AND AT LOWER LIMIT OF DETECTION: B, BI, CO, LEAD, SC, Y, AND NOT DETECTED: SILVER, AS, GOLD, BE, CD, LA, NB, SB, SN, AND W.
Reserve-resource
FIGURES LACKING. PROBABLY ONLY SMALL AMOUNT OF HIGH GRADE GALENA ORE REMAINS.
Nearby Deposits
Other deposits in the same region.
-
Pegmatite Quarries
- Beryllium commodity Site type Mine status
- Fairfield, Connecticut
- Surface
- 5.30 miles
-
Gold And Silver Mine
- Lead commodity Site type Mine status
- Fairfield, Connecticut
- Probably Vein Quartz
- Surface
- 6.96 miles
-
Siderite Iron Mine
- Iron commodity Site type Mine status
- Litchfield, Connecticut
- Surface
- 7.18 miles
-
Roxbury Siderite Mine
- Iron commodity Site type Mine status
- Litchfield, Connecticut
- Surface
- 7.36 miles
-
Roxbury Iron Mine
- Iron commodity Site type Mine status
- Litchfield, Connecticut
- Vein Quartz In Fault Zone
- Underground
- 7.47 miles
-
Roxbury Iron Mine
- Iron commodity Site type Mine status
- Litchfield, Connecticut
- Vein
- 7.83 miles
-
Captain Cook Quarry Beryllium Mine
- Beryllium commodity Site type Mine status
- Fairfield, Connecticut
- Surface
- 8.60 miles
-
Lanes Tungsten Mine
- Tungsten commodity Site type Mine status
- Fairfield, Connecticut
- Surface
- 10.31 miles
-
Arsenopyrite Arsenic Mine
- Arsenic commodity Site type Mine status
- Fairfield, Connecticut
- 12.02 miles
-
Roebling Mica-Feldspar-Beryl Mine
- Beryllium commodity Site type Mine status
- Litchfield, Connecticut
- Surface And Underground
- 12.77 miles
Nearby Places
- Brookfield (0.70 miles away)
- New Fairfield (4.07 miles away)
- Bridgewater (4.82 miles away)
- Danbury (5.58 miles away)
- Newtown (6.43 miles away)
- Bethel (6.63 miles away)
- New Milford (7.22 miles away)
- Putnam Lake (7.22 miles away)
- Roxbury (7.72 miles away)
- Sherman (8.67 miles away)
- Southbury (10.00 miles away)
- Patterson (10.68 miles away)
- Brewster Hill (10.71 miles away)
- Woodbury (11.40 miles away)
- Redding (11.41 miles away)
- Pawling (11.84 miles away)
- Brewster (11.96 miles away)
- Topstone (12.03 miles away)
- Washington (12.06 miles away)
- North Salem (12.53 miles away)
- Titicus (13.09 miles away)
- Lake Carmel (13.67 miles away)
- Ridgefield (13.68 miles away)
- Monroe (13.84 miles away)
Nearby Mining Districts
- Brookfield Mining District (0 miles away)
Footnotes
* Mine bounds on map indicate the general area that a mine occupies. For an detailed map, refer to the overseeing BLM field office.
** The mine central point is based on an average of the mine's bounding box(es) and does not necessarily fall on the claim itself.
1 World-class significance is determined by total endowment of the contained commodity. This includes all past production and remaining reserves. Each commodity is considered separately and commodities cannot be combined to arrive at a significant size. The tonnage thresholds are from the mine model grade-tonnage studies. As of June 2008, many entries were classified as significant under less strict rules.
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Notes
INFORMATION LACKING. SEVERAL PITS IN MARBLE. MARBLE GENERALLY COARSE GRAINED; PARTLY CALCITIC, PARTLY DOLOMITIC; MANY LAYERS OF MICA SCHIST WHERE CALCITIC.
INFORMATION LACKING. SEVERAL PITS IN MARBLE. MARBLE GENERALLY COARSE GRAINED; PARTLY CALCITIC, PARTLY DOLOMITIC; MANY LAYERS OF MICA SCHIST WHERE CALCITIC.