| Deposit ID | 10232553 |
|---|---|
| MAS/MILS ID | 3510350002 |
| Record type | Site |
| Current site name | Barra Verde |
| Point of reference | Ore Body |
|---|---|
| Geographic coordinates: | -36.49888, -6.16476 (WGS84) |
| Elevation | 350 |
Political divisions (FIPS codes)
Rio Grande Do Norte(province)
Brazil(country)
South America(continent)
Land(continent)
| Country | State |
|---|---|
| Brazil | Rio Grande Do Norte |
| Commodity | Importance |
|---|---|
| Molybdenum | Tertiary |
| Tungsten Critical | Primary |
| Materials | Type of material |
|---|---|
| Epidote | Unknown |
| Garnet | Unknown |
| Hornblende | Unknown |
| Scheelite | Unknown |
| Vesuvianite | Unknown |
| Ore Body (1) | -36.49888, -6.16476 |
|---|
| Strike | N10E | ||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dip | 12S | ||||||||||||||||||||||||||
| Thickness | 20M | ||||||||||||||||||||||||||
| Length | 500M | ||||||||||||||||||||||||||
| Width | 100M | ||||||||||||||||||||||||||
| Depth to top | 150M | ||||||||||||||||||||||||||
| |||||||||||||||||||||||||||
| Operation type | Underground |
|---|---|
| Development status | Producer |
| Commodity type | Metallic |
| Significant | Yes |
| Discovery year | 1943 |
| Mining method | Open Stope - Room and Pillar |
| Year of first production | 1955 |
| Milling method | Gravity |
| District name | Currais Novos |
|---|
| Type | Owner |
|---|---|
| Owner | Mineracao Sertaneja Ltda. |
| Interest | 100 |
| Home office | Brazil |
| Year | 1981 |
| Type | Operator |
|---|---|
| Owner | Mineracao Acauan Industria E Comercio S. A. |
| Interest | 100 |
| Home office | Brazil |
| Year | 1981 |
| Year | 1981 |
|---|---|
| Description | 194000 Mt Ore/Year |
| Type | In-situ | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Estimate year | 0 | |||||||||||||||||||||
| Measured | 300000mt ore | |||||||||||||||||||||
| Demonstrated | 300000mt ore | |||||||||||||||||||||
| Total resources | 300000mt ore | |||||||||||||||||||||
| ||||||||||||||||||||||
| Type of workings | Underground | ||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Length | 4000M | ||||||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||||||
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| U.S. Bureau of Mines | Minerals Availability System | MAS | 3510350002 |
BARBOSA, F.L.M., 1973, THE ECONOMIC POTENTIAL OF TUNGSTEN IN
BRAZIL, IN INTERNATIONAL ECONOMIES OF MINERALS AND FUELS
SCHOOL OF MINES QUART., V.68, NO.4, PP. 115-162.
EBERT, HEINZ, 1970. THE PREAMBRIAN GEOLOGY OF THE "BORBOREMA
(STATES OF PARAIBA AND RIO GRANDE DE NORTE, N.E. BRAZIL)
THE ORIGIN OF ITS MINERAL PROVINCES: GEOL. RUNDSCH., V.5
P.P 1292-1326.
JOHNSTON, W.D., AND DE VASCONCELLOS, F.M., 1945, SCHEELITE I
BRAZIL: ECON. GEOL., V.40:1, PP. 34-50.
VASCONCELLOS, F.M. DE, 1964, INSPECCAO A MINA DE SCHEELITA B
ENG. MIN. MET., V. XL, NO.280, PP. 229-232.
LEFOND, S.J., 1973, BRAZILIAN MINING: RELAXED GOVT ATTITUDE
THE WAY FOR EXPLOITING CRITICAL RESERVES: MIN. ENG., V.2
NO. 11, PP. 31-45.
BARBOSA, F.L.M., 1973, PERFIL ANALITICO DO TUNGSTENIO: ONPM
NO. 24, RIO DE JANEIRO, 69 P.
LOBO, G., TUNGSTEN BRAZIL, A REPORT TO DAVY MCKEE, SAO PAULO
BRAZIL, NOV., 1981.
YIN, S.W.H., AND WANG, C.T., TUNGSTEN: SOURCES, METALLURGY,
PROPERTIES, AND APPLICATIONS, PLENUM PRESS, NEW YORK.
ROSKILL INFORMATION SERVICES LTD., THE ECONOMICS OF TUNGSTEN
6'TH EDITION 1990. P 55.
| Subject category | Comment text |
|---|---|
| Deposit | 75-RCD 020 OWNER/OPER IS SUB OF BRASIMET INDUSTRIA E COMERCI 75-RCD 080 ORE BODY IS CONTINUATION OF BREJUI 935135001 OVER 75-RCD 050 OPERATED INTERMITTENTLY. CONTINUOUS SNCE 1969 75-RCD 080 LODES PLUNGE 15S IN DESCRIBED ZONE 75-RCD 120 OTHER MINING METHOD-COMB SHRINKAGE-OPEN STOPE 75-RCD 151 COSTS AND PRODUCTION EST FROM BARBOSA, 1973A 75-RCD-102-.14 PCT. MOLYBDENUM ISNOT RECOVERED PRESENTLY. 1956-1963 WAH CHANG CORPORATION LEASED THE PROPERTY AND COMMENCED OPERATION IN 1956. PRODUCTION DURING THIS PERIOD AMOUNTED TO 4624 MT CONCENTRATES. 1970-1975 MINERACAO SERTANEJA SECURED THE PROPERTY AND BEGAN OPERATIONS WITH INSTALLATION OF A GRAVITY MILL. PRODUCTION FOR THIS PERIOD, 3600 MT; TOTAL PRODUCTION TO 1975, 8224 MT WITH AN AVERAGE WO3 CONTENT OF 75%. 1975-1977 CURRENT RATE OF PRODUCTION IS 400 MTPD OF AS-MINED ORE.(FOR COMMENTS 010-019 SEE YIH AND WANG). THE BARRA VERDE DEPOSIT PRODUCED OVER 700 TONNES OF CONCENTRATES GRADING OVER 74% WO3 IN 1981 AND 1982, BUT PRODUCTION FELL TO 524 TONNES IN 1983 AND 559 TONNES IN 1984. IN 1979 THE GRADE OF CONCENTRATE PRODUCED EXCEEDED 77% WO3. (SEE ROSKILL IN BIBLIOGRAPHY). |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 27-FEB-1984 | Eastern Field Operations Center (EFOC) | U.S. Bureau of Mines |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.