Accession Number : ADA316585

Title :   Noninvasive Weight Determination of Stockpiled Ore Through Microgravity Measurements.

Descriptive Note : Final rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS GEOTECHNICAL LAB

Personal Author(s) : Sjostrom, Keith J. ; Butler, Dwain K.

PDF Url : ADA316585

Report Date : AUG 1996

Pagination or Media Count : 158

Abstract : The Defense National Stockpile Center (DNSC) maintains stockpiles of high-grade ores at various locations throughout the country and has a requirement to produce current mass estimates for selected piles as part of a national audit. Microgravity measurements were performed over each ore pile to provide high-resolution surveys of the gravitational field with which to determine the average bulk density of the ore material. Nettleton's and Parasnis' methods were used to analyze the gravity anomaly data. These methods have the advantage of averaging the effect of density variations more accurately than can be done from surface or core samples. Volumes of the ore stockpiles were determined using standard land surveying method. The computed weight for each ore stockpile is compared to the reported weight provided by DNSC. The greatest differences were computed over piles located on unprepared, sandy soil. Ore stockpiles situated on prepared surfaces or concrete pads typically have computed differences less than 10 percent.

Descriptors :   *GEOPHYSICS, *ORES(METAL SOURCES), MILITARY FACILITIES, STATISTICAL DATA, BULK MATERIALS, WEIGHT, TUNGSTEN, STOCKPILES, INVENTORY ANALYSIS, MANGANESE, GRAVITATIONAL FIELDS, GRAVITY ANOMALIES, FERROMANGANESE MINERALS.

Subject Categories : Geology, Geochemistry and Mineralogy
      Logistics, Military Facilities and Supplies

Distribution Statement : APPROVED FOR PUBLIC RELEASE