Results 31 to 40 of about 47,841 (257)

Morphometric analysis of landforms on basalt, granite gneiss and schist geological formations in north Karnataka, India – a comparison

Geology, Ecology, and Landscapes, 2020
Morphometric analysis reveals the development of land surface processes and provides an insight into hydrologic behaviour of watershed. A morphometric analysis of landforms on basalt, granite gneiss and schist in north Karnataka was conducted with the ...
P.L. Patil, G.S. Dasog, S.A. Yerimani, V. B. Kuligod, M. Hebbara, S.T. Hundekar   +5 more
doaj   +1 more source

Effect of chemical composition on the electrical conductivity of gneiss at high temperatures and pressures [PDF]

Solid Earth, 2018
The electrical conductivity of gneiss samples with different chemical compositions (WA = Na2O + K2O + CaO  =  7.12, 7.27 and 7.64 % weight percent) was measured using a complex impedance spectroscopic technique at 623–1073 K and 1.5 GPa and a ...
L. Dai, W. Sun, W. Sun, H. Li, H. Hu, L. Wu, J. Jiang   +6 more
doaj   +1 more source

An intrusive-like tectonic breccia in the archipelago of southwestern Finland [PDF]

Bulletin of the Geological Society of Finland, 1986
On an islet in the archipelago of southwestern Finland with metamorphic rocks belonging to the Svecofennian zone it is possible to follow in exposure for a distance of some metres the transition from a layered paragneiss with amphibolite bands to a ...
N. Edelman, L. Bergman, B. Lindberg
doaj   +1 more source

A newly identified cryogenian (ca. 806 ma) basement tonalite gneiss from the Eastern Karakoram, NW India: Constraints from geochemistry and zircon U-Pb geochronology

Frontiers in Earth Science, 2022
The Karakoram Terrane (KT) represents the southern margin of the Eurasian Plate, mainly consisting of Late Jurassic-Early Cretaceous subduction-related granites and post-collisional Miocene leucogranites, which intrude the Late Neo-Proterozoic basement ...
Shailendra Pundir, Vikas Adlakha, Santosh Kumar, Saurabh Singhal, Satyabrata Das   +4 more
doaj   +1 more source

Thermochronologic Constraints on the Extensional History of the Ibex Hills, Southeastern Black Mountains, Death Valley, California

Geological Journal, EarlyView.
A. Modeled T‐t paths for samples in the northern Ibex Hills, showing steady cooling throughout much of the Cenozoic, until rapid Miocene cooling. B. Weighted mean paths for each sample in this study. Note that all show a rapid cooling event at or just after 10 Ma, which is interpreted to represent exhumation as a result of regional extenstion ...
Zachariah D. Fleming
wiley   +1 more source

Thermal-induced damage mechanisms and permeability evolution in gneiss for deep mining applications

Frontiers in Earth Science
With the rapid development of deep mining and geothermal exploitation, the influence of high-temperature environment on the mechanical properties of rocks has become a core challenge for engineering safety.
Jian Zhang, Zilong Hu, Dakang Liu, Ji Qiu, Ran An   +4 more
doaj   +1 more source

Metais pesados em solos de uma topolitosseqüência do Triângulo Mineiro Heavy metal in soils of a topolithose-quence in the Triângulo Mineiro, State of Minas Gerais (Brazil)

Revista Brasileira de Ciência do Solo, 2004
O presente estudo teve por objetivo determinar os teores de metais pesados em solos de uma topolitosseqüência localizada no Triângulo Mineiro, Minas Gerais, para avaliar a contribuição potencial na disponibilidade destes metais em ambientes com solos de ...
T. S. Oliveira, L. M. Costa
doaj   +1 more source

Does Palsa Thaw in Northern Finland Contribute to Remobilisation of Metals Accumulated in Peat Into Surface Waters?

Land Degradation &Development, EarlyView.
ABSTRACT Permafrost is rapidly degrading in the sporadic zone, including palsa mires in Scandinavia. Peatlands in the area have likely accumulated heavy metals from atmospheric deposition of industrial contaminants in the wider region. As the palsa mire chemical composition is not well known, and in other permafrost regions the permafrost thaw may ...
Joanna Katarzyna Jóźwik, Krystyna Kozioł, Marcin Frankowski, Marta Jakubiak, Kamil Nowiński, Mariusz Jędrysek, Danuta Szumińska, Żaneta Polkowska   +7 more
wiley   +1 more source

Regional study of the Archean to Proterozoic crust at the Sudbury Neutrino Observatory (SNO+), Ontario: Predicting the geoneutrino flux

, 2014
The SNO+ detector, a new kiloton scale liquid scintillator detector capable of recording geoneutrino events, will define the strength of the Earth radiogenic heat.
Huang, Yu, Mantovani, Fabio, McDonough, William F., Rudnick, Roberta L., Shirey, Steven B., Strati, Virginia   +5 more
core   +1 more source

Carbon, Nitrogen, and Corresponding Stable Isotope Signatures Reveal Channel Banks as Major Sediment Sources in a Tropical Agricultural Watershed

Land Degradation &Development, EarlyView.
ABSTRACT Uncertainties about the applicability of δ13C and δ15N as tracers of sediment sources in tropical river basins highlight the need for more in‐depth investigations of these isotopes. This study therefore assessed the effectiveness of δ13C and δ15N signatures in discriminating sediment sources in an agricultural catchment in Northeast Brazil ...
Fábio Farias Amorim, Yuri Jacques Agra Bezerra da Silva, Rennan Cabral Nascimento, Ygor Jacques Agra Bezerra da Silva, Angelo Jamil Maia, Tales Tiecher, Jean Paolo Gomes Minella, Yusheng Zhang, Hari Ram Upadhayay, Simon Pulley, Adrian L. Collins   +10 more
wiley   +1 more source