| Deposit ID | 10304755 |
|---|---|
| MAS/MILS ID | 5880020011 |
| Record type | Site |
| Current site name | Ezuri |
| Point of reference | Ore Body |
|---|---|
| Geographic coordinates: | 140.56531, 40.26517 (WGS84) |
| Elevation | 90 |
| Location accuracy | 1000(meters) |
Political divisions (FIPS codes)
Akita(province)
Japan(country)
Asia(continent)
Land(continent)
| Country | State |
|---|---|
| Japan | Akita |
| Commodity | Importance |
|---|---|
| Barium-Barite Critical | Tertiary |
| Copper | Secondary |
| Gold | Secondary |
| Lead | Secondary |
| Silver | Secondary |
| Sulfur | Secondary |
| Zinc Critical | Primary |
| Materials | Type of material |
|---|---|
| Chalcopyrite | Unknown |
| Galena | Unknown |
| Pyrite | Unknown |
| Sphalerite | Unknown |
| Ore Body (1) | 140.56531, 40.26517 |
|---|
| Thickness | 6M | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Length | 1500M | ||||||||||||||
| Width | 500M | ||||||||||||||
| Depth to top | 300M | ||||||||||||||
| |||||||||||||||
| Operation type | Underground |
|---|---|
| Development status | Past Producer |
| Commodity type | Both |
| Significant | Yes |
| Discovery year | 1976 |
| Mining method | Caving Methods - Top Slicing |
| Year of first production | 1979 |
| Milling method | Flotation |
| District name | Kokuroku |
|---|
| Type | Owner-Operator |
|---|---|
| Owner | Dowa Mining Co. Ltd |
| Interest | 100 |
| Home office | Japan |
| Type | In-situ | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Estimate year | 1977 | ||||||||||||||||||||||||||||
| Measured | 3000000mt ore | ||||||||||||||||||||||||||||
| Indicated | 10000000mt ore | ||||||||||||||||||||||||||||
| Demonstrated | 13000000mt ore | ||||||||||||||||||||||||||||
| Total resources | 13000000mt ore | ||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||
| Type | In-situ | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Estimate year | 1991 | ||||||||||||||||||||||||||||
| Total resources | 3000000mt ore | ||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||
| Type of workings | Underground | ||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||||||||||||||||||||||||||||||
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| U.S. Bureau of Mines | Minerals Availability System | MAS | 5880020011 |
E&MJ INTERNATIONAL DIRECTORY OF MINING, 1991
MINING JOURNAL. INDUSTRY IN ACTION. DOWA FIND. JUNE 3,
1977, P. 435.
MINING MAGAZINE. JAPANESE BLACK ORE PROGRESS. OCTOBER
1977, P. 437.
ENGINEERING AND MINING JOURNAL, INTERNATIONAL DIRECTORY OF
MINING AND MINERAL PROCESSING OPERATIONS, MCGRAW-HILL,
1980.
HOW TRACKLESS MINING IS APPLIED TO KUROKO ORE DEPOSITS IN
JAPAN, WORLD MINING, MAY 1976, PP. 68-71.
IKI, SHOJI, KOROKO BRINGS REVIVAL TO JAPAN'S DOMESTIC
MINING, WORLD MINING, APR. 1967, PP. 12-16.
ISHIKAWA, ETAL, EXPLORATION OF THE EZURI KUROKO DEPOSITS IN
THE HOKUROKU DISTRICT, MINING GEOLOGY 30(3), PP. 137-152,
1980
LAMBERT, I.B., AND SATO, TAKEO, THE KUROKO AND ASSOCIATED
ORE DEPOSITS OF JAPAN: A REVIEW OF THEIR FEATURES AND
METALLOGENESIS, ECONOMIC GEOLOGY, VOL. 69, 1974, PP.1215-
1236.
MARUYAMA, S. AND SATO, N., GEOLOGY AND EXPLORATION OF THE
KUROKO DEPOSITS IN JAPAN, MINING AND CONCENTRATING OF
LEAD AND ZINC, PP. 171-195.
RAPID DEVELOPMENT OF THE FUKAZAWA MINE BY A TRACKLESS
HAULAGE SYSTEM, MINING MAGAZINE, DEC. 1976, PP. 504-519.
GEOLOGY OF THE KUROKO DEPSITS SOCIETY OF MINING GEOLOGISTS
OF JAPAN, MINING GEOLOGY SPECIAL ISSUE NO. 6, 1974.
SATO, Y., ET AL, ON THE EZURI KUROKO DEPOSITS WITH SPECIAL
REFERENCE TO THE PRESENT STATUS OF EXPLORATION AND
DEVELOPMENT, MINING GEOLOGY, 30(2), PP. 89-99, 1980.
SCOTT, S.D., STRUCTURAL CONTROL OF THE KUROKO DEPOSITS OF
THE HOLUROKU DISTRICT, JAPAN, MINING GEOLOGY, V. 28,
1978M PP. 301-311.
| Subject category | Comment text |
|---|---|
| Deposit | DIPS AVERAGE 10 DEGREES SOUTH |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 10-MAR-97 | Gazdik | U.S. Bureau of Mines |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.