نتایج جستجو برای: geochemical survey
تعداد نتایج: 383580 فیلتر نتایج به سال:
Elemental analysis has played an important role in the characterization of soils since inception of the soil survey in the US. Recent efforts in analysis of trace and major elements (geochemistry) have provided necessary data to soil survey users in a variety of areas. The first part of this paper provides a brief overview of elemental sources, forms, mobility, and bioavailability; critical asp...
Regional geochemical survey (RGS) results for the lskut River (1048). Telegraph Creek (104G) and Tulsequah (104K) areas were released in July 1988. The release consists of chemical and physical data for sediment and water samples collected from more than 2700 streams over an area of 35 000 square kilometres underlain by 50 different rock units. For each sample over 40 variables were recorded in...
Geochemical mapping programs carried out by the Geological Survey of Sweden (SGU) have generated large databases containing information on the concentrations of chemical elements in rocks, surface sediments and biogeochemical materials. Regional geochemical data being imprecise, multivariate, spatially auto-correlated and non-normally distributed pose specific problems to the choice of data ana...
1Centre for Exploration Targeting, University of Western Australia, 35 Stirling Highway, Crawley, 6009, Western Australia 2CSIRO Earth Science & Resource Engineering, 26 Dick Perry Ave, Kensington WA 6151, Australia 3Centre for Geochemical Evolution and Metallogeny of Continents, Macquarie University, Macquarie, NSW 2109, Australia 4Geological Survey of Western Australia, 100 Plain Street, East...
Age, geochemical composition, and distribution of Oligocene ignimbrites in the northern Sierra Nevada, California: implications for landscape morphology, elevation, and drainage divide geography of the Nevadaplano Elizabeth J. Cassel a; Andrew T. Calvert b; Stephan A. Graham a a Department of Geological and Environmental Sciences, Stanford University, Stanford, CA, USA b United States Geologica...
The Bonaparte project is a new multi-year bedrock mapping program of the British Columbia Geological Survey (BCGS) concentrating on Mesozoic arc volcanic and plutonic rocks of the Quesnel Terrane in the northeastern part of the Bonaparte Lake (92P) map sheet (Figure 1). The area encompasses a northwest-trending belt of high mineral potential that includes a number of interesting mineral occurre...
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