Results 61 to 70 of about 131,165 (299)

KLIMONAS-Ch03-A02– Geochemical and sedimentological analyses methods

open access: yes, 2023
Appendix of: Vigne J.-D., Briois F., Guilaine J. (eds.), « Klimonas, an Early Pre-Pottery Neolithic village in Cyprus », Gallia Préhistoire & Paléorient, International Supplement 1, CNRS Éditions, Paris, 2023.
openaire   +2 more sources

A mineral reconnaissance survey of the Abington-Biggar-Moffat-area, south-central Scotland [PDF]

open access: yes, 1979
Panned heavy mineral concentrates, mostly obtained from stream sediments, were collected from 195 sites in the Abington-Biggar-Moffat area. The project area, which lies immediately east of the formerly important mining district of Wanlockhead ...
Dawson, J., Floyd, J.D., Phillip, P.R.
core  

The solubility of rhenium in silicate melts: Implications for the geochemical properties of rhenium at high temperatures [PDF]

open access: yes, 2001
The solubility of rhenium (Re) in a haplobasaltic melt (anorthite-diopside eutectic composition) has been experimentally determined using the mechanically assisted equilibration technique at 1400°C as a function of oxygen fugacity (10−12 < fO2 ≤ 10−7 bar)
Dingwell, D.B.   +4 more
core   +1 more source

Research progress and current status of dynamic wave propagation characteristics in rock mass: A review

open access: yesDeep Underground Science and Engineering, EarlyView.
This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu   +8 more
wiley   +1 more source

Columbite-Group Minerals from New York Pegmatites: Insights from Isotopic and Geochemical Analyses

open access: yesGeosciences, 2018
Columbite crystals from niobium-yttrium-fluorine (NYF) pegmatites lacking zircon or containing metamict cyrtolite were analyzed for major and minor elements (Electron Microprobe (EMP)), trace elements (Laser Ablation-Inductively Coupled Plasma-Mass ...
Marian V. Lupulescu   +4 more
doaj   +1 more source

Organic Geochemical Characterization and Exploration Prospects of Hydrocarbon Source Rocks in Nepal

open access: yesEnergy Science &Engineering, EarlyView.
It provides a more detailed introduction to the current situation of oil and gas exploration in Nepal, as well as the properties and distribution characteristics of source rocks. ABSTRACT This study aims to evaluate the hydrocarbon generation potential and exploration prospects of hydrocarbon source rocks in the Dailekh to Dang–Tansen area of Nepal ...
Guoqiang Zhang   +4 more
wiley   +1 more source

Geochemical analysis of Cenozoic fossil conifers at high latitudes: Implications for molecular preservation and environmental change [PDF]

open access: yes, 2010
Fossil materials record ancient life and their adapted environment. Arctic plant fossils are critical for our understanding of the Earth’s paleoenvironment when high latitudes were under ice-free conditions.
Witkowski, Caitlyn
core   +1 more source

The metagenomics of biosilicification: causes and effects [PDF]

open access: yes, 2008
In order to determine the links between geochemical parameters controlling the formation of silica sinter in hot springs and their associated microbial diversity, a detailed characterisation of the waters and of in situ-grown silica sinters was combined ...
D. J. Tobler   +3 more
core   +2 more sources

Guidelines for Sample Preparation and Stable Isotope Analysis of Food for Traceability Studies

open access: yesFood Safety and Health, EarlyView.
This workflow illustrates sample preparation and analysis steps in stable isotope ratio mass spectrometer (IRMS) for food traceability. It emphasizes standardized preparation, encapsulation, calibration, and quality control to ensure accurate, comparable isotope data critical for verifying food origin and authenticity across complex supply chains ...
Bayan Nuralykyzy   +8 more
wiley   +1 more source

Data interpretation in forensic sediment and soil geochemistry [PDF]

open access: yes, 2006
Automated geochemical techniques enable reproducible elemental assays of small quantity samples and have been used in recent years in many forensic criminal investigations in England and Wales.
Bull, PA, Morgan, RM
core   +1 more source

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