Geologic information
Identification information
| Deposit ID |
10026333 |
| MRDS ID |
K003599 |
| Record type |
Site |
| Current site name |
Birch Mine |
| Alternate or previous names |
Steve Green |
Geographic areas
| Country |
State |
County |
| United States |
North Carolina |
Mitchell |
Comments on the location information
- SEE PLATE 3, USGS PROF. PAPER 577 FOR LOCATION
Commodities
| Commodity |
Importance |
| Mica |
Primary |
Comments on the commodity information
- MUSCOVITE - BROWNISH GREEN, MODERATELY RULED, BENT, TIED
Alteration
-
(Local)
Partly Weathered (100 Ft)
Host and associated rocks
| Host or associated |
Host |
| Rock type |
Metamorphic Rock
> Gneiss |
| Stratigraphic age (youngest) |
Neoproterozoic |
|
Geologic structures
| Type of structure |
Local |
| Structure description |
Pegmatite Is Partly Concordant With The Foliation Of The Enclosing Country Rock |
Ore body information
| General form |
IRREGULAR, TABULAR |
| Thickness |
7.62M
|
| Length |
152.4M
|
Comments on the geologic information
- IRREGULARLY ZONED: PLAGIOCLASE, PERTHITE, QUARTZ, MUSCOVITE PEGMATITE, FINE TO COARSE GRAINED IN UPPER WORKINGS; PLAGIOCLASE PEGMATITE, COARSE GRAINED; ACCESSORY QUARTZ, MUSCOVITE, GARNET IN LOWER WORKINGS WITH PLAGIOCLASE - MUSCOVITE PEGMATITE ALONG FOOTWALL, CENTER OR HANGING WALL; QUARTZ - PLAGIOCLASE PEGMATITE, FINE TO MEDIUM GRAINED, LOCALLY. MUSCOVITE CONCENTRATED IN AREAS OF LOW DIP
