The computer analysis of high resolution gamma-ray spectra from instrumental activation analysis experiments

Baedecker, P. A.; Grossman, J.N.

doi:10.3133/ofr89454

Cited by 17 publications

(13 citation statements)

References 32 publications

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“…USGS standard rocks BHVO-1, G-2, W-2, and SCo-1 were run as controls. Peak areas were determined using the ACCUSPEC software provided by Canberra, and data reduced utilizing the methods outlined by Baedecker and Grossman (1989); the elements Fe, Mn, Ca, Na, K, Sc, Cr, Co, Ni, Ga, Rb, Sr, Zr, Cs, Ba, La, Ce, Nd, Sm, Eu, Tb, Dy, Yb, Lu, Hf, Ta, Th, and U are routinely determined. Estimated uncertainties are based on a combination of counting statistics and results for the standard rocks, and are generally less than + 5% relative.…”

Section: Methodsmentioning

confidence: 99%

Petrogenesis of Garnet Pyroxenite and Spinel Peridotite Xenoliths of the Tell-Danun Alkali Basalt Volcano, Harrat As Shamah, Syria

Snyder

Taylor

Jerde

et al. 1993

International Geology Review

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A suite of samples, including kaersutite and ilmenite megacrysts, spinel peridotites, garnet pyroxenites, and the alkali basalts that host them, have been studied in an effort to better constrain the mineralogy and chemistry of the subcontinental mantle beneath the central portion of the Arabian plate. Kaersutite megacrysts are classified as Type-A high-pressure precipitates of the alkali basalt host, which transported these xenoliths to the surface and extruded them during formation of the Tell-Danun volcano, southwestern Syria. Ilmenite megacrysts are classified as Type-B megacrysts and could not have precipitated from the alkali basalts presently sampled. Instead, they were derived from a magma that was enriched in the rare-earth elements (REE) by ca. four times and depleted in Zr and Hf, compared to the alkali basalts.Garnet pyroxenites from the Tell-Danun volcanic field yield temperatures and pressures of 946-1045° C and 8-10 kbar, respectively. These xenoliths likely were precipitated as dikes or along walls of conduits at depths of 24-30 km in the lower crust and/or upper mantle beneath the Arabian plate. Spinel peridotites last were equilibrated at temperatures of 755-1080° C and pressures from 10-20 kbar (30-60 km depth) and could represent samples of a mantle that has been depleted by a prior partial melting event. Many spinel peridotites also contain evidence (specifically in concave-upward REE patterns) of a subsequent enrichment event. However, the age and timing of this depletion, and of the subsequent enrichment event, are not known. This event could have occurred as a consequence of the entrainment of the xenoliths in the LREEenriched alkali basalts or could have occurred prior to alkali basalt volcanism via metasomatic processes.

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Section: Methodsmentioning

confidence: 99%

Petrogenesis of Garnet Pyroxenite and Spinel Peridotite Xenoliths of the Tell-Danun Alkali Basalt Volcano, Harrat As Shamah, Syria

Snyder

Taylor

Jerde

et al. 1993

International Geology Review

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show abstract

“…The efficiency calibration parameters can be determined using the EFFCALIB program as described in Baedecker and Grossman (1989). The determination of the pulse pile-up resolving time is treated in the same publication.…”

Section: Detector Performance Parameters: Detectordatmentioning

confidence: 99%

“…The purpose of this manual is to document the implementation of the program SPECTRA and its associated utilities on 386 and higher personal computers running under the DOS operating system. The previous VAX implementation of the software library has been described in Baedecker and Grossman (1989). This report provides additional details on the installation of the program library under DOS, the application of the library to INAA data processing, and new features of the software.…”

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confidence: 99%

The SPECTRA program library; a PC based system for gamma-ray spectra analysis and INAA data reduction

Baedecker¹,

Grossman²

1994

Open-File Report

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“…Computer processing is done with SPECTRA and associated programs on a VAX 11/780 computer (Grossman and Baedecker, 1987;Baedecker and McKown, 1987;Baedecker and Grossman, 1989). Corrections are made for spectral interferences as well as for interferences on Zr, Ba, La, Ce and Nd from the products of 235 U fission in the reactor.…”

Section: Multielement Neutron Activation Analysismentioning

confidence: 99%

Geochemical data for Jurassic diabase associated with early Mesozoic basins in the Eastern United States; geologic setting, overview, and chemical methods used

The computer analysis of high resolution gamma-ray spectra from instrumental activation analysis experiments

Cited by 17 publications

References 32 publications

Petrogenesis of Garnet Pyroxenite and Spinel Peridotite Xenoliths of the Tell-Danun Alkali Basalt Volcano, Harrat As Shamah, Syria

Petrogenesis of Garnet Pyroxenite and Spinel Peridotite Xenoliths of the Tell-Danun Alkali Basalt Volcano, Harrat As Shamah, Syria

The SPECTRA program library; a PC based system for gamma-ray spectra analysis and INAA data reduction

Geochemical data for Jurassic diabase associated with early Mesozoic basins in the Eastern United States; geologic setting, overview, and chemical methods used

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