Lead Deposits in the Upper Cambrian of Central Texas

Abstract
The lead and zinc deposits in the Upper Cambrian rocks of central Texas are reviewed in the light of new detailed information. Included are analytical data for all deposits, detailed stratigraphic sections of the Cambrian rocks, and maps at a scale of 4 inches to the mile. Igneous rocks of Carboniferous or younger age in the area are recognized for the first time. It is concluded that a magmatic hydrothermal origin of the lead is more probable than a leaching-meteoric origin through ground water moving laterally then upward along buried knobs. The solution history of the carbonate rocks of the Llano uplift is reviewed in connection with the possibility of a ground-water origin; and new data are presented, the most important of which are the recognition for the first time of extensive solution of Precambrian marble during the Paleozoic, the finding of MarbleFalls limestone deposited in a sink at the level of the Hickory sandstone, and the recognition that the dips about the granite knobs are caused predominantly by intrastratal solution of Cap Mountain limestone.
Authors
Virgil Barnes
Citation

Barnes, V.E., 1956, Lead Deposits in the Upper Cambrian of Central Texas: The University of Texas at Austin, Bureau of Economic Geology, Report of Investigations No. 26, 69 p

Code
RI026
ISSN
2475-367X
Number
26
Number of figures
13
Number of pages
69
Publisher
The University of Texas at Austin, Bureau of Economic Geology
Series
Report of Investigation
Year
1956