Results 51 to 60 of about 74,269 (283)

CHARACTERISTICS OF THE UNIQUE Y-HREE-F-RICH PEGMATITE SYSTEM REVEALED BY ZIRCON GEOCHEMISTRY: A CASE STUDY FROM MT. PLOSKAYA AMAZONITE DEPOSIT, KOLA PENINSULA [PDF]

Минералогия
An amazonite-quartz-albite pegmatite body of the Mt. Ploskaya intrudes a metavolcanic complex of the Keivy Terrane (Kola Peninsula) and is unique in its diversity and an assemblage of ore and accessory Y-Yb-Ta-Nb-Be-Pb-F mineralization.
D.R. Zozulya, S.G. Skublov, E.V. Levashova, L.M. Lyalina   +3 more
doaj   +1 more source

Topographic Development History of the Alaska Range [PDF]

, 2014
The overall goal of this project is to use variations in sediment source through time as a proxy for deciphering the uplift history of the Alaska Range (Fig. 1).
Davis, Kailyn N.
core  

Assessing the volcanic hazard for Rome. 40Ar/39Ar and In-SAR constraints on the most recent eruptive activity and present-day uplift at Colli Albani Volcanic District [PDF]

, 2016
We present new 40Ar/39Ar data which allow us to refine the recurrence time for the most recent eruptive activity occurred at Colli Albani Volcanic District (CAVD) and constrain its geographic area.
Amato, Amato, B. Giaccio, B. R. Jicha, Cimini, D'Ambrosio, D. M. Palladino, Di Rocco, F. Florindo, F. Marra, Faccenna, Faccenna, Faccenna, Florindo, Freda, Frepoli, Funiciello, G. Sottili, Gaeta, Gaeta, Gaeta, Gaeta, Giaccio, Giaccio, Giaccio, Giordano, Gozzi, J. Taddeucci, Jicha, Karner, Karner, Karner, M. Gaeta, M. Polcari, Marra, Marra, Marra, Marra, Marra, Marra, Montone, Peccerillo, Rita, Rivera, S. Stramondo, Salvi, Sottili, Stramondo, Werner   +48 more
core   +1 more source

Investigating relationships among strontium, barium, and seasonality in wild baboons

Archaeometry, EarlyView.
Abstract Geochemical profiles of Australopithecus africanus and baboon teeth show fluctuating trace elements, possibly reflecting seasonal diets. Here we use laser ablation–inductively coupled plasma–mass spectrometric measurements of calcium‐normalized strontium and barium ratios (Sr/Ca and Ba/Ca) and ion microprobe analyses of oxygen isotopes (δ18O ...
Maya Bharatiya, Christine Austin, Manish Arora, Janaína N. Ávila, Esme K. Beamish, Wendy Dirks, Daniel R. Green, Nicole D. Leonard, W. Scott McGraw, Larissa Swedell, Ian S. Williams, Jian‐xin Zhao, Tanya M. Smith   +12 more
wiley   +1 more source

Discordance between cosmogenic nuclide concentrations in amalgamated sands and individual fluvial pebbles in an arid zone catchment [PDF]

, 2014
Based on cosmogenic 10Be and 26Al analyses in 15 individual detrital quartz pebbles (16–21 mm) and cosmogenic 10Be in amalgamated medium sand (0.25–0.50 mm), all collected from the outlet of the upper Gaub River catchment in Namibia, quartz pebbles yield
Bishop, Paul, Codilean, Alexandru T., Fabel, Derek, Fenton, Cassandra R., Xu, Sheng   +4 more
core   +1 more source

Trace Element Patterns in Juvenile Wild Chimpanzee Dentitions

Archaeometry, EarlyView.
ABSTRACT Trace elements are used to infer mammalian early‐life diets, environmental toxins, dispersal patterns, stress histories, and weaning ages. Here, we employ laser ablation‐inductively coupled plasma‐mass spectrometry (LA‐ICP‐MS) to reveal elemental patterns in our closest living relatives, chimpanzees.
Tanya M. Smith, Manish Arora, Maya Bharatiya, Nicole Leonard, Jian‐xin Zhao, Christine Austin   +5 more
wiley   +1 more source

Palaeoenvironmental changes recorded at the Velika Vrbica loess‐palaeosol sequence, Wallachian Basin, during MIS 3–MIS 1

Boreas, EarlyView.
This study presents a detailed investigation of the Velika Vrbica loess‐palaeosol sequence, situated in the Wallachian Basin of northeastern Serbia, with the aim to reconstruct palaeoenvironmental changes spanning Marine Isotope Stages (MIS) 3 to 1. Using optically stimulated luminescence (OSL) dating, low field magnetic susceptibility (χlf), and mass ...
Zoran M. Perić, Cathal S. Ryan, Warren Thompson, Milica G. Radaković, Petar Krsmanović, Helena Alexanderson, Slobodan B. Marković   +6 more
wiley   +1 more source

Comments on ‘Late Middle Pleistocene Wolstonian Stage (MIS 6) glaciation in lowland Britain and its North Sea regional equivalents – a review’

Boreas, EarlyView.
Divergent views debated over the past 20 years on the Wolstonian depositional record of Fenland and the Peterborough area have centred on whether there is evidence of a single (middle or late) glaciation or of both a middle and a late glaciation. A recent review promoted a single late Wolstonian glaciation, despite there being incontrovertible evidence
Harry E. Langford
wiley   +1 more source

Eastern Beringia and beyond: Late Wisconsinan and Holocene landscape dynamics along the Yukon Coastal Plain, Canada [PDF]

, 2012
Terrestrial permafrost archives along the Yukon Coastal Plain (northwest Canada) have recorded landscape development and environmental change since the Late Wisconsinan at the interface of unglaciated Beringia (i.e.
Fritz, Michael, Lantuit, Hugues, Meyer, Hanno, Pollard, W. H., Preusser, F., Schirrmeister, Lutz, Wetterich, Sebastian   +6 more
core   +1 more source

Early Holocene jökulhlaup chronology and deglaciation dynamics in central Iceland

Boreas, EarlyView.
Glacial lake outburst floods (jökulhlaups) have occurred throughout the Quaternary in glaciated regions worldwide. Reconstructing flood chronology yields insight into deglaciation processes, environmental change and the role of extreme events in landscape evolution.
Greta H. Wells, Þorsteinn Sæmundsson, Edwin R. C. Baynes, Timothy Beach, Sheryl Luzzadder‐Beach   +4 more
wiley   +1 more source