Results 101 to 110 of about 7,058,324 (263)

Automated particle analysis of D.B. Cooper's tie

Journal of Forensic Sciences, EarlyView.
Abstract Automated particle analysis (APA) using scanning electron microscopy (SEM) and energy‐dispersive x‐ray spectrometry (EDS) is a well‐known method in forensics, especially as it is applied to gunshot residue analysis. Here we describe the analysis of particles lifted from D.B. Cooper's tie, which was left on the hijacked plane in 1971.
Thomas G. Kaye, Kent L. Rhodes
wiley   +1 more source

Automated mapping of K-feldspar by electron backscatter diffraction and application to 40Ar/39Ar dating [PDF]

, 2008
The ability to quantify feldspar microstructure using the electron backscatter diffraction (EBSD) method has direct application in the study of rock deformation and strain kinematics.
Reddy, Steven M., Reddy, Steven, McLaren, S., McLaren, Sandra   +3 more
core   +1 more source

Myrmekite formed by Na- and Ca-metasomatism of K-feldspar [PDF]

, 2002
Myrmekite, an intergrowth of plagioclase and quartz vermicules, often occurs in felsic-to-intermediate, calc-alkalic plutonic and gneissic rocks. Several hypotheses for myrmekite genesis are briefly reviewed and discussed.
Rong, Jiashu
core   +3 more sources

Rapakivi K‐Feldspar Megacrysts in Monzogranitic Porphyry: Evidence for Magma Recharge and Mush Rejuvenation

Geochemistry, Geophysics, Geosystems
The formation, storage, and evolution of granitic magmas are fundamental processes driving the growth of continental crust. While traditionally attributed to crystal fractionation in high‐melt fraction magma chambers, the model invoking low‐melt fraction
Wang Li, Xuxuan Ma, Roberto Weinberg, Liang Qiu, Zhiyong Zhu, Haibing Li   +5 more
doaj   +1 more source

Aspects of Infrared Radioluminescence dosimetry in K-feldspar

Geochronometria, 2013
Infrared radioluminescence (IRRL) of K-feldspar, detected at peak wavelength of 865 nm, is emerging as a potential geochronometric tool. The present study explores and attempts to optimize the IRRL dating protocols and proposes a revised protocol for estimation of palaeodose.
Vaidehi Varma, Rabiul Biswas, Ashok Singhvi   +2 more
openaire   +1 more source

Soil wetting and drying processes influence stone artefact distribution in clay‐rich soils: A case study from Middle Gidley Island in Murujuga, northwest Western Australia

Archaeometry, EarlyView.
Abstract Soils that contain swelling clay minerals (e.g., montmorillonite) expand and contract during wetting and drying, causing movement within the soil profile. This process, known as argilliturbation, can alter artefact distributions, destroy stratigraphy and complicate the interpretation of archaeological deposits.
Caroline Mather, Matthias Leopold, Kaitlin Sullivan, Kane Ditchfield, Tom Horrocks, Luke Gliganic, Emma Beckett, Diana Patalwala, Emielda Yusiharni, Michael Smirk, William Hiscock, Jo McDonald   +11 more
wiley   +1 more source

Extending the age limit of luminescence dating using the dose-dependent sensitivity of MET-pIRIR signals from K-feldspar [PDF]

, 2013
We investigated the sensitivity change of multiple-elevated-temperature (MET) stimulated post-infrared infrared-stimulated luminescence (MET-pIRIR) signals as a response to irradiation, sunlight bleaching and heating using samples from the Mu Us Desert ...
Sheng-Hua Li (2268709), Zenobia Jacobs (19583683), Bo Li (19583689), Richard Roberts (19583686)   +3 more
core  

(Table 2) 40Ar/39Ar step heating results from multigrain separates of muscovite and K-feldspar from samples of ODP Holes 116-717A and 116-718C [PDF]

, 1990
(Table 2) 40Ar/39Ar step heating results from multigrain separates of muscovite and K-feldspar from samples of ODP Holes 116-717A and 116 ...
Harrison, T Mark, Heizler, Matthew T, Matthew T Heizler (7964780), Copeland, Peter, Peter Copeland (2843324), T Mark Harrison (7964777)   +5 more
core   +1 more source

Metamorphic evolution of sillimanite gneiss in the high-pressure terrane of the Western Gneiss Region (Norway) [PDF]

European Journal of Mineralogy
Sillimanite-bearing gneisses in the Romsdal region of the Western Gneiss Region (south Norway) have been investigated to document the presence, formation, composition and petrological evolution of the sillimanite-bearing assemblages. Sillimanite is found
A. K. Engvik, J. Jakob
doaj   +1 more source

The Material Basis of 18th‐Century Meissen Porcelain

Archaeometry, EarlyView.
ABSTRACT In the summer of 1708, the quest for making hard‐paste porcelain from Saxonian clay and other mineral resources succeeded. This was achieved by applying as its essential ingredient newly discovered pure kaolin from Heidelsberg near Aue, western Saxon Ore Mountains.
Robert B. Heimann
wiley   +1 more source