Sökt på: a system of geology
Vi gjorde istället en sökning på titeln a system of geology vilket gav totalt 16 träffar
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 …
Pelagic Barite
Reconstruction of ocean paleoproductivity and paleochemistry is paramount to understanding global biogeochemical cycles such as the carbon, oxygen and sulfur cycles and the …
The Pyrite Trace Element Paleo-Ocean Chemistry Proxy
The use of the trace element content of sedimentary pyrite as a proxy for the trace element composition of past oceans has recently emerged. The pyrite proxy has several potential …
Molybdenum as a Paleoredox Proxy
Molybdenum (Mo) is a widely used trace metal for investigating redox conditions. However, unanswered questions remain that concentration and bulk isotopic analysis cannot specially …
Reconstructing Precambrian pCO2 and pO2 Using Paleosols
Paleosols formed in direct contact with the Earth's atmosphere, so they can record the composition of the atmosphere through weathering processes and products. Herein we critically …