John F. Slack
John Slack is a Scientist Emeritus with the USGS Geology, Energy & Minerals (GEM) Science Center in Reston, VA.
Science and Products
Filter Total Items: 69
Sm-Nd dating of the giant Sullivan Pb-Zn-Ag deposit, British Columbia Sm-Nd dating of the giant Sullivan Pb-Zn-Ag deposit, British Columbia
We report here Sm and Nd isotope data for hydrothermal tourmalinites and sulfide ores from the giant Sullivan Pb-Zn-Ag deposit, which occurs in the lower part of the Mesoproterozoic Purcell (Belt) Supergroup. Whole-rock samples of quartz-tourmaline tourmalinite from the footwall alteration pipe yield a Sm-Nd isochron age of 1470 ± 59 Ma, recording synsedimentary B metasomatism of clastic...
Authors
Shao-Yong Jiang, John F. Slack, Martin R. Palmer
Alkali-deficient tourmaline from the Sullivan Pb-Zn-Ag deposit, British Columbia Alkali-deficient tourmaline from the Sullivan Pb-Zn-Ag deposit, British Columbia
Alkali-deficient tourmalines are found in albitized rocks from the hanging-wall of the Sullivan Pb-Zn-Ag deposit (British Columbia, Canada). They approximate the Mg-equivalent of foitite with an idealized formula □(Mg2Al)Al6Si6O18(BO3)3(OH)4. Major chemical substitutions in the tourmalines are the alkali-defect type [Na*(x) + Mg*(Y) = □(x) + Al(Y)] and the uvite type [Na*(x) + Al(Y) = Ca...
Authors
Shao-Yong Jiang, John F. Slack, Martin R. Palmer
USGS research on mineral resources, 1991; program and abstracts USGS research on mineral resources, 1991; program and abstracts
No abstract available.
Authors
Elizabeth E. Good, John F. Slack, Rama K. Kotra
Mineral resources of the Citico Creek Wilderness Study Area, Monroe County, Tennessee Mineral resources of the Citico Creek Wilderness Study Area, Monroe County, Tennessee
No abstract available.
Authors
John F. Slack, E. R. Force, P. T. Behum, B. B. Williams
Mineral resources of the Big Frog Wilderness Study Area and additions, Polk County, Tennessee and Fannin County, Georgia Mineral resources of the Big Frog Wilderness Study Area and additions, Polk County, Tennessee and Fannin County, Georgia
No abstract available.
Authors
John F. Slack, Gertrude C. Gazdik, Maynard L. Dunn
Science and Products
Filter Total Items: 69
Sm-Nd dating of the giant Sullivan Pb-Zn-Ag deposit, British Columbia Sm-Nd dating of the giant Sullivan Pb-Zn-Ag deposit, British Columbia
We report here Sm and Nd isotope data for hydrothermal tourmalinites and sulfide ores from the giant Sullivan Pb-Zn-Ag deposit, which occurs in the lower part of the Mesoproterozoic Purcell (Belt) Supergroup. Whole-rock samples of quartz-tourmaline tourmalinite from the footwall alteration pipe yield a Sm-Nd isochron age of 1470 ± 59 Ma, recording synsedimentary B metasomatism of clastic...
Authors
Shao-Yong Jiang, John F. Slack, Martin R. Palmer
Alkali-deficient tourmaline from the Sullivan Pb-Zn-Ag deposit, British Columbia Alkali-deficient tourmaline from the Sullivan Pb-Zn-Ag deposit, British Columbia
Alkali-deficient tourmalines are found in albitized rocks from the hanging-wall of the Sullivan Pb-Zn-Ag deposit (British Columbia, Canada). They approximate the Mg-equivalent of foitite with an idealized formula □(Mg2Al)Al6Si6O18(BO3)3(OH)4. Major chemical substitutions in the tourmalines are the alkali-defect type [Na*(x) + Mg*(Y) = □(x) + Al(Y)] and the uvite type [Na*(x) + Al(Y) = Ca...
Authors
Shao-Yong Jiang, John F. Slack, Martin R. Palmer
USGS research on mineral resources, 1991; program and abstracts USGS research on mineral resources, 1991; program and abstracts
No abstract available.
Authors
Elizabeth E. Good, John F. Slack, Rama K. Kotra
Mineral resources of the Citico Creek Wilderness Study Area, Monroe County, Tennessee Mineral resources of the Citico Creek Wilderness Study Area, Monroe County, Tennessee
No abstract available.
Authors
John F. Slack, E. R. Force, P. T. Behum, B. B. Williams
Mineral resources of the Big Frog Wilderness Study Area and additions, Polk County, Tennessee and Fannin County, Georgia Mineral resources of the Big Frog Wilderness Study Area and additions, Polk County, Tennessee and Fannin County, Georgia
No abstract available.
Authors
John F. Slack, Gertrude C. Gazdik, Maynard L. Dunn