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Determination of the occurrence of gold in an unoxidized Carlin-type ore sample using synchrotron radiation

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms

By:
, , , , , , , , , and
DOI: 10.1016/0168-583X(87)90365-X

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Abstract

The occurrence of the so-called invisible gold in two unoxidized Carlin-type gold samples from Nevada has been determined using synchrotron X-ray fluorescence (SXRF) analysis at the National Synchrotron Light Source, Brookhaven National Laboratory. A bedded sample from the East ore zone of the Carlin deposit and a breccia sample from Horse Canyon were analyzed. Preliminary results show that gold is found only in the Horse Canyon breccia sample. Experimental details including other X-ray line and diffraction peak interferences, standards used, and minimum detection limits (MDLs) are discussed. Gold, with a MDL range of 0.8 to 3 ppm, was not detected in euhedral pyrite crystals except in the interior porous portion of one grain. Gold was detected in some parts of the matrix. The phase which contains gold has not yet been identified. The highest content of gold so far analyzed is about 40 ppm. There are interesting implications of these new findings. ?? 1987.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Determination of the occurrence of gold in an unoxidized Carlin-type ore sample using synchrotron radiation
Series title:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
DOI:
10.1016/0168-583X(87)90365-X
Volume
22
Issue:
1-3
Year Published:
1987
Language:
English
Publisher:
Elsevier
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
First page:
394
Last page:
400