Statistical uncertainties of elemental concentrations extracted from neutron-induced gamma-ray measurements

Grau, J. A.; Schweitzer, J.S.; Hertzog, R.C.

doi:10.1109/tns.1990.574209

Cited by 31 publications

(24 citation statements)

References 1 publication

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“…The statistical uncertainty of each element is calculated for each of the elements measured with the GST and NGT (Grau et al, 1990;Schweitzer et al, 1988;Bristow et al, 1994). This error is strongly related to the normalization factor, which is calculated at each depth level (equation 3).…”

Section: Step 6: Calculation Of Oxide Percentagesmentioning

confidence: 99%

Explanatory Notes

1996

Proceedings of the Ocean Drilling Program

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Section: Step 6: Calculation Of Oxide Percentagesmentioning

confidence: 99%

Explanatory Notes

1996

Proceedings of the Ocean Drilling Program

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“…The calculated statistical uncertainty of each element is calculated from each of the elements measured with the GST and NGT (Grau et al, 1990;Schweitzer et al, 1988). This error is strongly related to the normalization factor, which is calculated at each depth (Equation 2).…”

Section: Calculation Of Error Logsmentioning

confidence: 99%

“…The processed NGT curves are from the geochemical logging tool string. Figure 4 displays the oxide-weight fractions estimated from the logs from Hole 859B, along with calculated statistical uncertainties of each element (Grau et al, 1990;Schweitzer et al, 1988). Core measurements of XRF major elemental analyses are displayed as solid circles for comparison with the oxideweight fractions derived from the log data.…”

Section: Site 859mentioning

confidence: 99%

Data Report: Geochemical Logging through an Accretionary Prism: Chile Triple Junction

Pratson¹,

Broglia²,

Golovchenko³

et al. 1995

Proceedings of the Ocean Drilling Program, 141 Scientific Results

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Geochemical well logs were obtained through sediments at Leg 141 Sites 859 and 863. Corrections have been applied to the logs to account for variations in borehole size, drilling-fluid composition, and drill-pipe attenuation. Concentrations of Th, U, and Gd, as well as oxide weight percentages, have been calculated from the logs and compared with shipboard and shorebased X-ray-fluorescence (XRF) and carbonate bomb core measurements. The geochemical processing was performed in both open hole and cased sections of Holes 859B and 863B. Comparison of XRF core data to log data is good.

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“…The chalks of Units III and IV cannot be distinguished on these logs, as their chemical composition resembles that of lithologies of Unit II. Figure 6 displays the oxide weight fractions estimated from the logs from Hole 815A, as well as calculated statistical uncertainties (plus and minus one standard deviation) of each element (Grau et al, 1990;Schweitzer et al, 1988). This error is strongly related to the normalization factor, which is calculated at each depth (Eq.…”

Section: Comparison Of Geochemical Logs To Core Site 815mentioning

confidence: 99%

Data Report: Geochemical Well Logs through Cenozoic and Quaternary Sediments from Sites 815, 817, 820, 822, and 823

Pratson¹,

Broglia²,

Jarrard³

1993

Proceedings of the Ocean Drilling Program

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Geochemical well logs were obtained through sediments at Sites 815, 817, 820, 822, and 823 of Leg 133. Corrections have been applied to the logs to account for variations in hole size, drilling-fluid composition, and drill-pipe attenuation. Oxide and calcium carbonate weight percentages have been calculated from the processed logs and are compared with the available carbonate measurements from core. Log-derived CaCO 3 measurements correlate well with shipboard CaCO 3 core-derived measurements in each of the logged open-hole intervals.

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Statistical uncertainties of elemental concentrations extracted from neutron-induced gamma-ray measurements

Cited by 31 publications

References 1 publication

Explanatory Notes

Explanatory Notes

Data Report: Geochemical Logging through an Accretionary Prism: Chile Triple Junction

Data Report: Geochemical Well Logs through Cenozoic and Quaternary Sediments from Sites 815, 817, 820, 822, and 823

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