Crane Mica Mine, Lumpkin County, Georgia, USAi

Regional Level Types
Crane Mica Mine	Mine
Lumpkin County	County
Georgia	State
USA	Country

This mine is located 200 feet northwest of the Tipton Mine upon the same pegmatite dike. The mine consists of an inclined shaft about 45 feet long, which dips 31° to the northeast following the dip of the pegmatite. The incline is in good condition, although untimbered; the work is said to have been opened a number of years ago. The mica schist of the hanging wall is exposed along the roof of the incline; the footwall is not exposed. Very little mica may be seen in the medium-grained pegmatite which is at least six feet thick throughout the length of the incline. It is likely that most of the mica is associated with a quartz lens which dips northeastward with the dike and which occurs in the pegmatite about one to one and one-half feet below the hanging wall. This lens, 6 to 12 inches in thickness, is thickest near the mouth of the incline and thins out down the dip about 20 feet below the entrance. Some narrow xenoliths of mica schist dip northeastward where they are included in the pegmatite. The mica from this mine is similar to the mica from the Tipton Mine. It is reported that books of mica weighing 75 pounds or more were removed from the mine. Since a considerable amount of scrap mica has been obtained from the two mines described above and an unknown amount of sheet mica, the line of outcrop between the two openings should be further prospected. This direction is N. 75° W. Large fragments of quartz may he found along the surface 100 feet or more northwest of the Crane Mine, indicatiing that the dike has farther extension in that direction.