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nonradioactive

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Journal Article
Journal: Geophysics
Published: 23 February 2022
Geophysics (2022) 87 (3): D91–D100.
... response sensitivity of fracture density and the saturation of fracture evaluation in nonradioactive technology (NRT), we have developed a method based on modifying the neutron self-shielding effect to quantitatively calculate fracture density. The gamma counts of elements with content that did not change...
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Journal Article
Journal: GSA Bulletin
Published: 01 April 1941
GSA Bulletin (1941) 52 (4): 561–600.
... is presented by a simple method which identifies this problem with an equivalent one in the cooling of a nonradioactive earth. The facts as to slowness of cooling for temperature perturbations of long wave length are reviewed. The importance of the large heat capacity of the earth is emphasized by means...
Journal Article
Journal: AAPG Bulletin
Published: 01 December 1970
AAPG Bulletin (1970) 54 (12): 2444–2447.
... and the benzene solution was washed first with HCl-BaCla aqueous solution and then successively with distilled water to remove contaminating radioactive sulfate. The benzene was evaporated and the residual sulfur was found to be essentially nonradioactive by both the Geiger-Mueller counting and liquid...
Journal Article
Published: 01 May 2004
Vadose Zone Journal (2004) 3 (2): 730.
... by irradiation of uranium. Plutonium production generated a large amount of radioactive and nonradioactive waste, and the majority of it was disposed off in underground tanks or directly into the subsurface. Since the end of the Cold War, the focus of Hanford has shifted to environmental cleanup. Cleanup...
Journal Article
Journal: AAPG Bulletin
Published: 01 May 1988
AAPG Bulletin (1988) 72 (5): 634–636.
... by element values and ur values, but one may find it difficult, if not impossible, to distinguish between fresh sandstone and weathered shale (or shale covered by thin nonradioactive detritus), since the element and ur values will be similar. A few centimeters of cover can produce marked attenuation...
FIGURES
Journal Article
Published: 05 April 2023
Geological Magazine (2023) 160 (6): 1090–1097.
... are the isotopic ratios of the asthenosphere and the MLMR, respectively. Note that R a and R m vary with time for radioactive decay systems such as the 147 Sm– 143 Nd and 87 Rb– 87 Sr systems. For a nonradioactive system, such as K isotopes, R a is a constant, while R m also varies with time...
FIGURES
Journal Article
Published: 01 September 2023
Russ. Geol. Geophys. (2023) 64 (9): 1031–1039.
...-158.5, 447-173.0, and 47-286.5 are altered magnetite ores with humite and “hatchettolite” (U-pyrochlore), and sample 435-146.5 is a younger richterite–calcite carbonatite with tetraferriphlogopite and nonradioactive pyrochlore. All samples are regarded as “ordinary Nb–Ta ores” ( Afanas’ev, 2011...
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Journal Article
Journal: Geology
Published: 01 November 2005
Geology (2005) 33 (11): 841–844.
... that amoeboids that were incubated with 45 Ca incorporated appreciable amounts of the tracer into the cell, probably into the cytoplasmic granules. During the following nonradioactive chase incubation, 45 Ca was transferred from the cellular storage sites (possibly the granules) to the newly precipitated CaCO...
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Journal Article
Journal: AAPG Bulletin
Published: 01 January 1935
AAPG Bulletin (1935) 19 (1): 78–115.
... to the fact that a value of the reciprocal of the normal gradient equal to 200 feet per °F. implies an age of a nonradioactive earth of 1,000 or 1,500 million years. Thermal data from undisturbed basement rocks would be of great value, therefore, in estimating the age of a nonradioactive earth...
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Journal Article
Published: 01 November 2021
Russ. Geol. Geophys. (2021) 62 (11): 1214–1228.
... of nonradioactive ores [in Polish with summary in English]. Sci. Bull. The Stanisław Staszic Acad. of Min. and Metall., No. 303 “Mathematics-Physics-Chemistry” . Krakow, Poland . Nikiforova , Z.S. , Gerasimov , B.B. , Glushkova , E.G. , Kazhenkina , A.G...
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Journal Article
Journal: Geophysics
Published: 19 April 2022
Geophysics (2022) 87 (3): 1MJ–5MJ.
... separating two half-spaces composed of anisotropic media of arbitrary symmetry and orientation. The formula is based on the weak-anisotropy approximation. Zhang et al. propose a method based on modifying the neutron self-shielding effect to quantitatively calculate fracture density in nonradioactive...
Journal Article
Journal: AAPG Bulletin
Published: 01 September 1983
AAPG Bulletin (1983) 67 (9): 1410–1414.
... identical systems we stretch them at the same constant rate of 1.6 × 10 -15 /sec ( β ≅ 1.6 in 10 Ma). One of the systems is kept sediment-free during this process. On the two others we deposit nonradioactive sediments (this is the only departure from Table 1 ) at two different rates: 100 m/Ma (~ 330 ft/Ma...
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Journal Article
Published: 25 August 2000
Canadian Journal of Earth Sciences (2000) 37 (9): 1301–1308.
... for large-scale simulation of nonradioactive and radioactive mass transport in discretely fractured porous formations. By using this technique, Harrison et al. ( 1992 ) conducted a numerical analysis of solute migration through fractured clayey deposits into underlying aquifers. Kennedy and Lennox ( 1995...
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Journal Article
Journal: AAPG Bulletin
Published: 01 March 1977
AAPG Bulletin (1977) 61 (3): 360–375.
... the ore zone from the barren parts of the host. McKay and Hyden (1956) found nonradioactive pyrite nodules, as much as 6 in. (15 cm) in diameter and with anhydrite veinlets, in the yellow rock. Anomalous radioactivity was detected on outcrop in Secs. 2, 3, T5N, R9W, and Sec. 31, T6N, R9W...
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Journal Article
Journal: AAPG Bulletin
Published: 01 January 1998
AAPG Bulletin (1998) 82 (1): 50–69.
... minerals are regular and smooth, but some nodules have irregular or scalloped margins. All bitumen nodules contain numerous (5 to >100), minute (0.1-20 μm), blocky inclusions of uraninite or thorite ( Figure 4 ). Nonradioactive inclusions of pyrite, sphalerite, chalcopyrite, anatase, or illite...
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Journal Article
Published: 01 November 2007
Vadose Zone Journal (2007) 6 (4): 899–905.
... or nonradioactive sources must be determined through drilling and sample characterization. The observed deep movement of 137 Cs at several of the tank farms led to intensive investigation of the geochemical controls on migration of 137 Cs, 90 Sr, and several other contaminants. Zachara et al. (2007...
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Journal Article
Published: 01 February 2006
Clays and Clay Minerals (2006) 54 (1): 45–53.
... an opportunity to avoid these kinetic problems ( Carrado, 2000 ). In this study, we focused on the synthesis of organo-hectorite (Na 0.7 [Li 0.7 Mg 5.3 Si 8 O 20 (OH) 4 ]) and the coprecipitation with either Cm(III) or Eu(III) as a nonradioactive chemical homologue for trivalent actinides ( Chapman...
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Journal Article
Published: 01 December 2005
Environmental Geosciences (2005) 12 (4): 219–233.
...) produced nuclear material for use in national defense, space, and medical programs in the United States. Pilot-scale tests of chemical processes used in the Defense Waste Processing Facility, Separations Area, and fuel and target manufacturing areas were conducted in the TNX Area of SRS. Nonradioactive...
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Journal Article
Journal: Geophysics
Published: 01 January 2000
Geophysics (2000) 65 (5): 1622–1630.
... to dump various materials ranging from ordinary refuse to highly radioactive material. One such site is referred to as Material Disposal Area F (MDA F). Activity at this site is poorly documented. A big pit was excavated for disposal of classified but nonradioactive scrap metal. The possibility...
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Journal Article
Journal: AAPG Bulletin
Published: 01 March 1995
AAPG Bulletin (1995) 79 (3): 337–350.
... of hydrocarbons in the reservoir. For reasons we do not understand, many of the sands exhibit a poor neutron-density response to gas. The poor neutron-density response may be due to nonradioactive shales in the sands or to a larger-than-normal percentage of kaolinite present in Nigeria strata (J. Warner, 1992...
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