Results 51 to 60 of about 1,087 (206)
Boreas, EarlyView.Rapid thaw of the Earth's cryosphere in response to anthropogenic warming highlights the need to identify and understand the contrasting signatures of past ice‐sheet stability and collapse. The Kvarken archipelago, western Finland, at the centre of the former Fennoscandian Ice Sheet (FIS), has been designated a UNESCO World Heritage site in recognition
Niko Putkinen +6 more
wiley +1 more source
Rare metal granites in the structures of the Russian sector of Pacific ore belt
Записки Горного института, 2016 Data are presented on the geology of areas of rare metal granites proliferation in the Russian sector of the Pacific Ore Belt that make one take a fresh look at the East Asian granitoid area to update its metallogeny. History is reviewed of studying rare
V. I. Alekseev
doaj +1 more source
Constraining the geotherm beneath the British Isles from Bayesian inversion of Curie depth: integrated modelling of magnetic, geothermal, and seismic data [PDF]
Solid Earth, 2019 Curie depth offers a valuable constraint on the thermal structure of the lithosphere, based on its interpretation as the depth to 580 ∘C, but current methods underestimate the range of uncertainty. We formulate the estimation of Curie depth within
B. Mather, J. Fullea
doaj +1 more source
Geostandards and Geoanalytical Research, EarlyView.Key Points Measurement of 86Sr at count rates < 1500 cps can result in statistical bias. Non‐linear signals in analogue detection mode (e.g., Rb) present a challenge for accurately dating high 87Rb/86Sr mica (> 1000). Accounting for these considerations, high 87Rb/86Sr mica are dated here with accuracies of ∼ 1%.
Duane C. Petts +5 more
wiley +1 more source
U-Pb (Zircon) Ages of Metavolcanic Rocks From the Itaiacoca Group: Tectonic Implications [PDF]
Geologia USP. Série Científica, 2003 The main aim of this work is to present and discuss the U-Pb ages obtained for zircon grains from metavolcanic rocks of theItaiacoca Group. The Itaiacoca Group is a metavolcano-sedimentary sequence, which occurs as a narrow belt between theCunhaporanga ...
Oswaldo Siga Jr. +8 more
doaj
Geostandards and Geoanalytical Research, EarlyView.Key Points 7 μm spot‐diameter LA‐MC‐ICP‐MS analyses yield accurate zircon U‐Pb ages. 1013 Ω amplifier resistors improve low‐signal Pb measurements. Saturn correction protocols minimise down‐hole fractionation effects. We present a systematic evaluation of high spatial‐resolution zircon U‐Pb dating using a Thermo Scientific Neoma multi‐collector ICP‐MS ...
Cristiano Lana, John D. Clemens
wiley +1 more source
Geologica Acta, 2009 Magmatic structures related to the mechanical interaction between mafic magmas and granitoids have been studied in the Valle Fértil calc-alkaline igneous complex, Argentina.
A. CASTRO +7 more
doaj
Geologia USP. Série Científica, 2015 The Ediacaran plutonic activity, related to the Brasilian/Pan-African orogeny, is one of the most important geological features in the Borborema Province, formed by batholiths, stocks and dikes.
Alan Pereira da Costa +3 more
doaj +1 more source
Groundwater, EarlyView.Random forest classification predictions of groundwater hydrochemical facies (HCFs) can be used for multiple purposes, including the mapping of salinity and other groundwater characteristics. Shown on the figure are predictions of HCFs at the water table across the conterminous United States.
Paul E. Stackelberg +5 more
wiley +1 more source
Apatite and Zircon Helium Data from the Wallowa and Elkhorn Mountains
, 2022 Apatite and Zircon Helium thermochronometry data from the Wallowa and Bald Mountain Batholiths, Oregon, USA. Dataset accompanies the paper "Multiphase topographic and thermal histories of the Wallowa and Elkhorn Mountains, Blue Mountains Province, Oregon,
Schoettle-Greene, Philip +2 more
core +1 more source