Location and mapping of gold sites in unoxidized Carlin-type ores

Conference · Thu Jan 01 00:00:00 EST 1987

OSTI ID:5438957

Chen, J R; Back, J M; Chao, E C.T.; Minkin, J A; Hanson, A L; Jones, K W; Rivers, M L; Sutton, S R

Established micro-techniques (optical, scanning electron microscopy augmented with energy dispersive x-ray analysis (SEM-EDX), and electron probe microanalysis (EPMA) have been combined with the relatively new synchrotron-induced x-ray fluorescence (SXRF) microprobe technique to obtain specific data on the occurrences of gold in Carlin-type ores. An SXRF map of the Au in a 1.0 x 1.4 mm/sup 2/ region of a sample has been made. We describe the complementary nature of these microanalytical techniques and how they provide a relatively quick, effective way of pinpointing the location of discrete gold particles greater than or equal to 0.2 ..mu..m diameter at the surface of a sample. 8 refs., 2 figs., 1 tab.

• Research Organization: State Univ. of New York, Geneseo (USA); Geological Survey, Reston, VA (USA); Brookhaven National Lab., Upton, NY (USA); Chicago Univ., IL (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5438957
• Report Number(s): BNL-40763; CONF-8708180-10; ON: DE88006354
• Resource Relation: Conference: Symposium on X-ray microscopy, Upton, NY, USA, 31 Aug 1987; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
GOLD
DETECTION
GOLD ORES
MICROANALYSIS
ELECTRON MICROPROBE ANALYSIS
MAPS
OPTICAL MICROSCOPY
PHOTOMICROGRAPHY
SCANNING ELECTRON MICROSCOPY
X-RAY FLUORESCENCE ANALYSIS
CHEMICAL ANALYSIS
ELECTRON MICROSCOPY
ELEMENTS
METALS
MICROSCOPY
NONDESTRUCTIVE ANALYSIS
ORES
PHOTOGRAPHY
TRANSITION ELEMENTS
X-RAY EMISSION ANALYSIS
580400* - Geochemistry- (-1989)
400101 - Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures