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Feldspar Pegmatite Quarry No. Cj-025

Past Producer in Middlesex county in Connecticut, United States with commodity Feldspar
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Host and associated rocks
  8. Nearby scientific data
  9. Controls for ore emplacement
  10. Economic information about the deposit and operations
  11. Mining district
  12. Workings at the site
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10067598
MRDS ID W000387
Record type Site
Current site name Feldspar Pegmatite Quarry No. Cj-025

Geographic coordinates

Geographic coordinates: -72.57202, 41.60471 (WGS84)

Site location context

Political divisions (FIPS codes)

Middlesex(county)

Connecticut(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Middle Haddam(quadrangle 1:24,000 scale)

Hartford(quadrangle 1:100,000 scale)

Hartford(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Outlet Connecticut River(hydrologic unit)

Lower Connecticut(hydrologic accounting unit)

Connecticut(hydrologic subregion)

New England(hydrologic region)

Geographic areas

Country State County
United States Connecticut Middlesex

Commodities

Commodity Importance
Feldspar Primary

Comments on the commodity information

  • QUARRY SIZE NOT INDICATED. QUARRY SITE ON ONE OF TWO SMALL PEGMATITE OUTCROPS. QUARRY SITE PEGMATITE ABOUT 200 FEET LONG NE-SW, 75 FEET WIDE SE-NW. OTHER PEGMATITE 200 FEET TO SW; ABOUT 300 FEET LONG NE-SW, 150 FEET WIDE SE-NW. PROSPECT ON ADDITIONAL SMALLER DIKE LOCATED 1900 FEET SW.

Materials information

Materials Type of material
Feldspar Ore
Quartz Ore

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss
    Stratigraphic age (youngest) Late Permian
  • Host or associated Host
    Rock type Plutonic Rock > Pegmatite

Nearby scientific data

(1) -72.57202, 41.60471
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Economic information

Controls for ore emplacement

  • Pegmatite Dike

Comments on the geologic information

  • GEOL.DESC: DIKE CLUSTER PART OF NUMEROUS SWARMS OF PEGMATITE DIKES; MOSTLY IN WESTWARD ADJACENT MIDDLE ORDOVICIAN COLLINS HILL SCHIST, WITH SOME DIKES IN NEARBY FURTHER WESTWARD PRE-ORDOVICIAN MIDDLETOWN GNEISS. ZONE OF SWARMS AND INDIVIDUAL DIKES TRENDS MOSTLY NORTH.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Non-metallic
Significant No
Production years UNKNOWN

Mining district

District name Portland

Comments on the production information

  • FIGURES LACKING, PROBABLY SMALL PRODUCTION. PRODUCED FELDSPAR CONCENTRATES.

Comments on the reserve resource information

  • FIGURES LACKING, PROBABLY MODERATE AMOUNTS OF FELDSPAR AVAILABLE FROM DIKE CLUSTER.

Workings at the site

  • Type of workings Unknown
    Overall length 91.44M
    Overall width 45.72M

Comments on development

  • TOTAL$: US

Reference information

Bibliographic references

  • Deposit

    BROOKINS, D.G., 1970, "CONTRI. TO GEOCHRON. IN CONN.," CONN. GEOLOGICAL SURVEY, R. I. NO. 5, PG. 12, 13

General comments

Subject category Comment text
Deposit STUGARD'S MAP AT 1:24000, LOCATES QUARRY SITE AND PEGMATITES. BROOKINS' GIVES GEOCHRON DATES OF ABOUT 260 M.Y. FOR SIMILAR PEGMATITES. ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1972 D'Agostino, John P. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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