Sökt på: a system of geology
totalt 753 träffar
Characterization of Swelling Clays as Components of the Engineered Barrier System for Geological Repositories
This publication presents the results of a coordinated research project (CRP) carried out between 2002 and 2007 on the subject of swelling clays proposed for use as a component in …
Use of Carbon Isotopic Tracers in Investigating Soil Carbon Sequestration and Stabilization in Agroecosystems
This publication provides an overview of conventional and isotopic methods available for measuring and modelling soil carbon dynamics. It includes information on the use of carbon …
Subsurface Geology and Coal Resources of the Pennsylvanian System in Wabash County, Illinois
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the …
Subsurface Geology and Coal Resources of the Pennsylvanian System in Jasper County, Illinois
The TEX86 Paleotemperature Proxy
The TEX86 paleothermometer is based upon the distribution of archaeal membrane lipids ('GDGTs') in marine sediments. GDGTs are ubiquitous, abundant and relatively resistant to …
Selenium Isotope Paleobiogeochemistry
The attraction of selenium isotopes as a paleoenvironmental tracer lies in the high redox potential of selenium oxyanions (SeIV and SeVI), the dominant species in the modern ocean. …
Barium Isotopes
In the modern marine environment, barium isotope (d138Ba) variations are primarily driven by barite cycling—barite incorporates 'light' Ba isotopes from solution, rendering the …
Emerging Patterns in Proterozoic Lipid Biomarker Records
Diverse and abundant lipid biomarker assemblages have been reported from a variety of Proterozoic marine environments from the careful analysis of well-preserved rocks and oils. …
Lithium Isotopes
Lithium isotopes are a relatively novel tracer of present and past silicate weathering processes. Given that silicate weathering is the primary long-term method by which CO2 is …
Vanadium Isotopes
Vanadium isotope ratios (51V/50V) have potential to provide information about changes in past ocean oxygen contents. In particular, V isotopes may find utility in tracing …