Lot 372, Cobb County, Georgia, USAi

Regional Level Types
Lot 372	Prospect
Cobb County	County
Georgia	State
USA	Country

C. J. Kamper, of Atlanta, owns a pyrite prospect on lot 372, 17th district, 2d section, in the central part of Cobb County. The property forms part of a 100-acre tract about 3 miles south of Marietta, the county seat. The prospect is situated on a wooded slope at the source of one of the branches leading into Nickajack Creek, three-eighths mile southwest of the Western & Atlantic Railroad, the Marietta-Atlanta electric car line, and that part of the Dixie Highway connecting Marietta with Atlanta.

In 1902, or about that time, the pyritiferous formation here exposed was prospected by means of two vertical shafts 40 feet deep, sunk on the hanging wall side of the outcrop and a cross-cut tunnel at least 100 feet in length driven northwest from a spring which is the source of the small stream above referred to. Both tunnel and shafts reached the ore body, but as the ore sought at that time was either copper or gold, prospecting was abandoned and the excavations have since caved in. The tunnel is now (1918) being cleaned out to ascertain the nature of the deposit below the surface.

The rocks on this property are chiefly light gray quartzitic and micaceous schists together with biotite gneiss which outcrops within a few hundred yards northwest of the ore deposit and bears some resemblance to the Kennesaw granite composing the mountain of that name just northwest of Marietta. These rocks belong to the schistose and foliated formations of the pre-cambrian mass. Their general strike is N.30°-40°E., and the dip is about 50°SE.

The pyrite-bearing formation outcrops along the strike rather continuously for 200 yards, showing a maximum and probably uniform thickness of 10 feet. The rock exposed is a fine-grained siliceous schist, stained dull red by the oxidation of the numerous pyrite particles. This is not genuine gossan, though it does indicate a lean sulphide ore, which is seen on the dump at the mouth of the tunnel.

The pyrite ore collected from the dump consists of small grains and irregular crystals of bright pyrite, less than l/16 inch in diameter, disseminated in gray quartzitic schists. The gangue minerals are almost wholly fine to medium granular quartz with some white mica and magnetite. No massive or lump ore has been found.