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Whole rock major, minor, and trace element geochemistry of the upper part of the Mount Emmons-Redwell porphyry molybdenum (Climax-type) deposit, Redwell Basin, Crested Butte, Colorado

Metadata Updated: September 8, 2023

This U.S. Geological Survey (USGS) data release provides whole rock major, minor, and trace element geochemical data from the fluorine-rich Mount Emmons-Redwell porphyry molybdenum (Climax-type) deposit (Mt. Emmons-Redwell deposit), located approximately 5.6 kilometers (3.5 miles) northwest of Crested Butte, Colorado. The Mt. Emmons-Redwell deposit partly underlies Redwell Basin on the northwest flank of Mount Emmons in the west-central region of the Colorado Mineral Belt. Mineralization of the Mt. Emmons-Redwell deposit occurs at depth as vein, veinlet, stockwork, and fracture-hosted Climax-type mineralization [308 Mt at 0.32% Mo (Galey, 1978; Guarnera and Anderson, 2007)], and is associated with the Mt. Emmons igneous complex. Samples were collected by research staff from the USGS Geology, Geophysics, and Geochemistry Science Center (GGGSC) and Colorado School of Mines from outcrops, waste rock piles, and drill core from the upper part of the deposit, the associated base metal vein system, and the surrounding hydrothermally altered to unaltered country rock.Laboratory analyses of samples were conducted under independent analytical contract, with oversight by the USGS. Major and minor elements Al, Ba, Ca, Cr, Fe, K, Mn, Na, P, Si, Sr, Ti, and V were determined using wavelength dispersive X-ray fluorescence spectrometry (WDXRF) methods, and are reported as oxide equivalents. Major, minor and trace elements Ag, Al, As, B, Ba, Be, Bi, Ca, Cd, Ce, Co, Cr, Cs, Cu, Dy, Er, Eu, Fe, Ga, Gd, Ge, Hf, Ho, In, K, La, Li, Lu, Mg, Mn, Mo, Nb, Nd, Ni, P, Pb, Pr, Rb, Sb, S, Sc, Se, Si, Sm, Sn, Sr, Ta, Tb, Te, Th, Ti, Tl, Tm, U, V, W, Y, Yb, Zn, and Zr were determined using inductively coupled plasma-optical emission-mass spectroscopy (ICP-OES-MS) methods. Fe2+ was determined using acid digestion and titration (Titr) analysis. F was determined using ion-selective electrode (ISE) analysis. Loss-on-ignition (LOI) was determined gravimetrically after sample combustion.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date September 8, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date September 8, 2023
Publisher U.S. Geological Survey
Identifier USGS:61659aead34e52f49c8231d7
Data Last Modified 20220627
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 9f4ac32d-66a6-474b-a83f-de2ebdb5a169
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -107.0788,38.8793,-107.028,38.9125
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash e67b7c6e91d24d44342b82ef79b847ffc71943152f6153daf8e254e08ffd2b52
Source Schema Version 1.1
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