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Title: Alabama Tin Belt. Metallogenesis and mineral resource evaluation. Final report for the 1983-1984 project year

Abstract

The Alabama Tin Belt covers an area of approximately 180 km/sup 2/ within the Tallapoosa lithotectonic block of the Northern Alabama Piedmont. In the second year of this three year project, efforts continued towards detailing the distribution and petrogenesis of tin-bearing peraluminous granitoids in central Coosa County. In particular, mapping, structural analysis and petrographical/petrological studies have been used to examine the geologic settings, geochemical and mineralogical variations, crystallization conditions and nature of source rock(s) of selected granitic plutons and related pegmatite bodies in the vicinity of Rockford, Alabama. Thermobarometeric techniques (a ternary feldspar thermobarometer and a plagioclase-muscovite geothermometer), that could be used in conjunction with compositions of constituent minerals to yield reasonable estmates of granite crystallization and alteration temperatures, were also developed. Preliminary results provide evidence that: (1) the granitoids possess characteristics possibly derived from both sedimentary (S-type) and igneous (I-type) sources; (2) feldspars of the tin-bearing pegmatites possess extremely high Rb and Cs concentrations; (3) the peraluminous granitoids crystallized under varying oxygen fugacity conditions at temperatures of 510 to 710/sup 0/ and pressures greater than 6 kbar; and, (4) the Rockford Pluton occupies the core of a post-D/sub 1/, antiformal structure that is overturned to the northwest.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Alabama Univ., University (USA). Dept. of Geology; Murray State Univ., KY (USA)
OSTI Identifier:
5734881
Report Number(s):
NP-6901446
ON: TI86901446
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; ALABAMA; GRANITES; PETROGENESIS; GEOLOGIC DEPOSITS; GEOTHERMOMETRY; PEGMATITES; RARE EARTHS; TIN ORES; ELEMENTS; FEDERAL REGION IV; IGNEOUS ROCKS; METALS; NORTH AMERICA; ORES; PLUTONIC ROCKS; ROCKS; USA; 580100* - Geology & Hydrology- (-1989)

Citation Formats

Green, N L, Tompa, B, Gomolka, J, Wade, G, and Usdansky, S I. Alabama Tin Belt. Metallogenesis and mineral resource evaluation. Final report for the 1983-1984 project year. United States: N. p., 1986. Web.
Green, N L, Tompa, B, Gomolka, J, Wade, G, & Usdansky, S I. Alabama Tin Belt. Metallogenesis and mineral resource evaluation. Final report for the 1983-1984 project year. United States.
Green, N L, Tompa, B, Gomolka, J, Wade, G, and Usdansky, S I. 1986. "Alabama Tin Belt. Metallogenesis and mineral resource evaluation. Final report for the 1983-1984 project year". United States.
@article{osti_5734881,
title = {Alabama Tin Belt. Metallogenesis and mineral resource evaluation. Final report for the 1983-1984 project year},
author = {Green, N L and Tompa, B and Gomolka, J and Wade, G and Usdansky, S I},
abstractNote = {The Alabama Tin Belt covers an area of approximately 180 km/sup 2/ within the Tallapoosa lithotectonic block of the Northern Alabama Piedmont. In the second year of this three year project, efforts continued towards detailing the distribution and petrogenesis of tin-bearing peraluminous granitoids in central Coosa County. In particular, mapping, structural analysis and petrographical/petrological studies have been used to examine the geologic settings, geochemical and mineralogical variations, crystallization conditions and nature of source rock(s) of selected granitic plutons and related pegmatite bodies in the vicinity of Rockford, Alabama. Thermobarometeric techniques (a ternary feldspar thermobarometer and a plagioclase-muscovite geothermometer), that could be used in conjunction with compositions of constituent minerals to yield reasonable estmates of granite crystallization and alteration temperatures, were also developed. Preliminary results provide evidence that: (1) the granitoids possess characteristics possibly derived from both sedimentary (S-type) and igneous (I-type) sources; (2) feldspars of the tin-bearing pegmatites possess extremely high Rb and Cs concentrations; (3) the peraluminous granitoids crystallized under varying oxygen fugacity conditions at temperatures of 510 to 710/sup 0/ and pressures greater than 6 kbar; and, (4) the Rockford Pluton occupies the core of a post-D/sub 1/, antiformal structure that is overturned to the northwest.},
doi = {},
url = {https://www.osti.gov/biblio/5734881}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Mar 01 00:00:00 EST 1986},
month = {Sat Mar 01 00:00:00 EST 1986}
}

Technical Report:
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