| Deposit ID | 10023525 |
|---|---|
| MRDS ID | I000616 |
| Record type | Site |
| Current site name | Encantada-Buenavista - Fluorita De Mexico Operation |
| Alternate or previous names | Muzquiz |
| Related records | 10134813 |
| Geographic coordinates: | -102.58377, 28.66693 (WGS84) |
|---|---|
| Relative position | THE MINE IS 200 KM BY ROAD FROM THE PLANT AT THE TOWN OF MUZQUIZ. |
Political divisions (FIPS codes)
Pima(county)
Arizona(state)
United States(country)
North America(continent)
Land(continent)
| Country | State |
|---|---|
| Mexico | Coahuila De Zaragoza |
| Commodity | Importance |
|---|---|
| Fluorine-Fluorite Critical | Primary |
| Materials | Type of material |
|---|---|
| Fluorite | Ore |
| Calcite | Gangue |
| Dolomite | Gangue |
| Quartz | Gangue |
| Host or associated | Associated | ||||
|---|---|---|---|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite | ||||
| |||||
| Host or associated | Host |
|---|---|
| Rock type | Sedimentary Rock > Clastic Sedimentary Rock > Shale |
| Host or associated | Host |
|---|---|
| Rock type | Sedimentary Rock > Carbonate > Limestone |
| Rock unit name | Georgetown Limestone;Del Rio Shale |
| Rock description | Georgetown Lst;Del Rio Shale |
| (1) | -102.58377, 28.66693 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Sierra Madre Oriental |
| Type of structure | Local |
| Structure description | Faults |
| Development status | Producer |
|---|---|
| Commodity type | Non-metallic |
| Significant | No |
| District name | Encantada-Buenavista District, Muzquiz District |
|---|
| Type | Owner-Operator |
|---|---|
| Owner | Fluorita De Mexico (49% Owned By Applied Industrial Materials Corp. Of The U.S.A.) |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | I000616 |
GRIFFITHS, JOYCE, 1988, MEXICO'S INDUSTRIAL MINERALS--MEETING MANANA'S CHALLENGE: INDUSTRIAL MINERALS, NO. 250, P. 19-41.
HARBEN, P.W., AND BATES, R.L., 1990, INDUSTRIAL MINERALS--GEOLOGY AND WORLD DEPOSITS: LONDON, INDUSTRIAL MINERALS DIVISION OF METAL BULLETIN PLC, P. 110-119.
VAN ALSTINE, R.E., 1961, INVESTIGATION OF THE PRINCIPAL FLUORSPAR DISTRICTS OF MEXICO, IN GEOLOGICAL SURVEY RESEARCH 1961--SHORT PAPERS IN THE GEOLOGIC AND HYDROLOGIC SCIENCES, ARTICLES 147-292: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 424-C, P. C212-C215.
CIMRI
| Subject category | Comment text |
|---|---|
| Deposit | THE ORE IS FOUND TRAPPED BELOW THE IMPERVIOUS RIO SHALE AND ABOVE THE GEORGETOWN LIMESTONE OF EARLY CRETACEOUS AGE. THE DEPOSIT IS ASSOCIATED WITH A DEEP-SEATED BATHOLITH TYPE INTRUSION IN THE SIERRA MADRE ORIENTAL. THE IGNEOUS BODY TRENDS NORTHWEST TO SOUTHEAST. THE MINERALIZED MANTO HAS AN AVERAGE THICKNESS OF SOME 120 M AND AN ECONOMIC CUT OFF AT 2 M. TROUGHS ON THE GEORGETOWN LIMESTONE SURFACE WERE FILLED OR PARTIALLY FILLED WITH DEL RIO SHALE, WHICH IN TURN WAS BLANKETED BY BUDA LIMESTONE. MINERALIZATION IS LOCALIZED ALONG THE MORE INTENSELY JOINTED LIMESTONE, AND CEASES AT THE SHALE CONTACT. THE 4 MAIN MINERALIZED ZONES ARE (FROM BOTTOM TO TOP): 1) 10-15 FT BELOW THE TOP OF THE GEORGETOWN LST ARE SMALL PODS OF FLUORSPAR ASSOCIATED WITH RHYOLITE OR BROWN SILICEOUS ROCK (AVE. 10-30% CAF2); 2) 1-3 FT OF PARTLY TO WHOLLY REPLACED GEORGETOWN LST DIRECTLY BELOW ITS CONTACT WITH THE DEL RIO SHALE (AVE. 40-75% CAF2); 3) 2-3 FT OF MASSIVE CRYSTALLINE FLUORITE (GRADE > 80% CAF2); |
| Deposit | 4) 2-5 FT OF SHALE WITH FLUORITE CRYSTALS (AVE. 20-50% CAF2). THE MAIN WORKINGS ARE IN ZONE 3. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-FEB-1990 | Orris, Greta J. | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.