Strontium isotope evidence for the age of the Vaqueros Formation and latest Oligocene marine transgression in the northern Santa Maria Province, Central California. Stratigraphic sections and gamma-ray spectrometry from five outcrops of the Monterey Formation in southwestern California; Naples Beach, Point Pedermales, Lion's Head, Shell Beach, and Point Buchon

1995 ◽  
Keyword(s):  
Gamma Ray ◽  
Strontium Isotope ◽  
Gamma Ray Spectrometry ◽  
Marine Transgression ◽  
Central California ◽  
Monterey Formation ◽  
Isotope Evidence ◽  
Santa Maria

scholarly journals Análise Estatística da Concentração de Potássio Obtida por Aerolevantamentos Geofísicos em Diferentes Formações Geológicas na Região de Santa Maria (RS)

2007 ◽  
Vol 34 (2) ◽  
pp. 99 ◽  
Author(s):  
JOÃO EDUARDO DA SILVA PEREIRA ◽  
JOSÉ LUIZ SILVÉRIO DA SILVA ◽  
ADELIR JOSÉ STRIEDER ◽  
CARLOS ALBERTO DA FONSECA PIRES
Keyword(s):  
Linear Models ◽  
Gamma Ray ◽  
Volcanic Rocks ◽  
Rio Grande ◽  
Spatial Relation ◽  
Gamma Ray Spectrometry ◽  
Rio Grande Do Sul ◽  
Thematic Map ◽  
Mean Values ◽  
Santa Maria

The present work was developed in outcrops of Santa Maria region, southern Brazil, Rio Grande do Sul State. Statistic evaluations were applied in different rock types. The possibility to distinguish different geologic units, sedimentary and volcanic (acid and basic types) by means of the statistic analyses from the use of airborne gamma-ray spectrometry integrating potash radiation emissions data with geological and geochemistry data is discussed. This Project was carried out at 1973 by Geological Survey of Brazil/Companhia de Pesquisas de Recursos Minerais. The Camaquã Project evaluated the behavior of potash concentrations generating XYZ Geosof 1997 format, one grid, thematic map and digital thematic map files from this total area. Using these data base, the integration of statistics analyses in sedimentary formations which belong to the Depressão Central do Rio Grande do Sul and/or to volcanic rocks from Planalto da Serra Geral at the border of Paraná Basin was tested. Univariate statistics model was used: the media, the standard media error, and the trust limits were estimated. The Tukey’s Test was used in order to compare mean values. The results allowed to create criteria to distinguish geological formations based on their potash content. The back-calibration technique was employed to transform K radiation to percentage. Inside this context it was possible to define characteristic values from radioactive potash emissions and their trust ranges in relation to geologic formations. The potash variable when evaluated in relation to geographic Universal Transverse Mercator coordinates system showed a spatial relation following one polynomial model of second order, with one determination coefficient. The statística 7.1 software Generalist Linear Models produced by Statistics Department of Federal University of Santa Maria/Brazil was used.

Gamma-Ray Spectrometric Analysis of Some Trace Elements in the Human Articular Disc of the Mandible

1963 ◽  
Vol 03 (02) ◽  
pp. 175-182 ◽  
Author(s):  
Bo Bergman ◽  
Rune Söremark
Keyword(s):  
Trace Elements ◽  
Neutron Activation ◽  
Quantitative Data ◽  
Thermal Neutron Flux ◽  
Gamma Ray ◽  
Dry Weight ◽  
Gamma Ray Spectrometry ◽  
Spectrometric Analysis ◽  
Articular Disc ◽  
Group Separation

SummaryBy means of neutron activation and gamma-ray spectrometry the concentrations in the human mandibular articular disc of the following elements have been determined: Na, Mn, Cu, Zn, Rb, Sr, Cd, W, and Au. The discs were obtained at necropsy from seven men and nine women, ranging in age from 56 to 71 years.The activation was carried out in a thermal neutron flux of about 1.7 XlO12 neutrons × cm−2 × sec.−1 for about 20 hours. A chemical group separationwas performed before the gamma-ray spectrometry. Quantitative data based on the dry weight of the cartilage samples were obtained by comparing the photo-peak area of the identified elements with those of appropriate standards.

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