Bulletin - Geological Survey Volume 33

Bulletin - Geological Survey Volume 33

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 edition. Excerpt: ...shearing, all illustrative of what has happened to the formation on a larger scale. The general schistosity strikes N. 45 E., and dips 45-50 SE., corresponding with the gray schist forming the country rock of this region. Exposures of these types are common along the deeply eroded trench of Raccoon Creek. The rocks probably belong to the metamorphosed Paleozoic formations whose eastern border is marked by the pyrite belt as indicated by numerous prospects along the apparently continuous ore lead, from the Tallapoosa mine in northeastern Haralson County to the Rush-Banks prospect in western Paulding County. As the shafts and drifts have been for some time under water, it has been necessary to seek information regarding the extent of the ore body and the character of the ore from reports made in former years.1 The pyrite deposit outcropping on this property is in two parallel bodies or veins 60 or 70 feet apart. The lower one has been partially explored by an 18-foot shaft. Its length is exposed at least 20 feet; it strikes N. 50 E., and dips 50 SE. The upper or main vein has been opened to a depth of 65 feet by a 23-foot vertical shaft and below that by an incline along the dip. At the bottom of the vertical shaft a level extends 54 feet southwest and 36 feet northeast. Surface prospecting by shallow pits and small cross-cuts is said to have shown that the ore body continues intermittently about 400 yards along the strike, but these pits are partially filled and there is a distinct absence of continuous gossan outcrops. The hornblendicchloritic walls exposed at the mouth of the upper vein strike N. 50 E., and dip 60 SE. Pratt1 records the dip of the vein as 75-80 SE. The genetic relation of these two veins, the upper and the lower, is not...
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Product details

  • Paperback | 72 pages
  • 189 x 246 x 4mm | 145g
  • United States
  • English
  • black & white illustrations
  • 123689345X
  • 9781236893451