Anomalously old biotite 40Ar/39Ar ages in the NW Himalaya [PDF]
, 2017 Biotite 40Ar/39Ar ages older than corresponding muscovite 40Ar/39Ar ages, contrary to the diffusion properties of these minerals, are common in the Himalaya and other metamorphic regions.
Grujic, Djordje +6 more
core +1 more source
Intergranular diffusion rates from the analysis of garnet surfaces: implications for metamorphic equilibration [PDF]
, 2017 Novel approaches to garnet analysis have been used to assess rates of intergranular diffusion between different matrix phases and garnet porphyroblasts in a regionally metamorphosed staurolite-mica-schist from the Barrovian-type area in Scotland.
Chung, Peter +2 more
core +1 more source
Cooling history of the eastern Svecokarelides: whole-rock and mica Rb-Sr and hornblende K-Ar ages in the areas of Pihtipudas-Iisalmi and Joroinen-Sulkava, Finland [PDF]
Bulletin of the Geological Society of Finland, 1990 Rb-Sr age determination on mica and whole-rock samples and K-Ar age determination on hornblendes were carried out to get information on the time of metamorphism and early cooling in two Proterozic areas of the Finnish Svecokarelides.
U. Haudenschild
doaj +1 more source
Fossil biomass preserved as graphitic carbon in a late paleoproterozoic banded iron formation metamorphosed at more than 550°C [PDF]
, 2019 Metamorphism is thought to destroy microfossils, partly through devolatilization and graphitization of biogenic organic matter. However, the extent to which there is a loss of molecular, elemental and isotope signatures from biomass during high ...
De Gregorio, BT +9 more
core +2 more sources
Integrative biology of injury in animals
Biological Reviews, Volume 98, Issue 1, Page 34-62, February 2023., 2023 ABSTRACT Mechanical injury is a prevalent challenge in the lives of animals with myriad potential consequences for organisms, including reduced fitness and death. Research on animal injury has focused on many aspects, including the frequency and severity of wounding in wild populations, the short‐ and long‐term consequences of injury at different ...
Corey W. Rennolds, Alexandra E. Bely
wiley +1 more source
Hidden morphological characteristics study of Huyanshan rock mass based on coal seam volatilization
Meikuang AnquanIn order to find the hidden morphological characteristics of the rock mass in Huyanshan, based on the spatial variation characteristics of the volatilization of the coal seam on the side of the intrusive rock mass, the mechanism of the hidden ...
Zhiyang ZHAO, Jingui ZHAO, Gaofeng YANG
doaj +1 more source
Titanite-bearing calc-silicate rocks constrain timing, duration and magnitude of metamorphic CO2 degassing in the Himalayan belt [PDF]
, 2018 The pressure, temperature, and timing (PTt) conditions at which CO2 was produced during the Himalayan prograde metamorphism have been constrained, focusing on the most abundant calcsilicate rock type in the Himalaya. A detailed petrological modeling of a clinopyroxene, scapolite, Kfeldspar, plagioclase, quartz, calcite calcsilicate rock allowed the ...
arxiv +1 more source
Production of $^3$He in Rocks by Reactions Induced by Particles of the Nuclear-Active and Muon Components of Cosmic Rays: Geological and Petrological Implications [PDF]
Petrology, 2016, Vol. 24, No. 1, pp. 21-34, 2016 The paper presents data on the production of the $^3$He nuclide in rocks under the effect of cosmic-ray particles. The origin of the nuclide in the ground in neutron- and proton-induced spallation reactions, reactions induced by high-energy muons, and negative muon capture reactions is analyzed.
arxiv +1 more source
Effects of water temperature on freshwater macroinvertebrates: a systematic review
Biological Reviews, Volume 98, Issue 1, Page 191-221, February 2023., 2023 ABSTRACT Water temperature is one of the main abiotic factors affecting the structure and functioning of aquatic ecosystems and its alteration can have important effects on biological communities. Macroinvertebrates are excellent bio‐indicators and have been used for decades to assess the status of aquatic ecosystems as a result of environmental ...
Luca Bonacina +3 more
wiley +1 more source
Metamorphic Rocks, Ireland [PDF]
Nature, 1880 THERE appears to be confusion as to the times when metamorphic action occurred among the Irish rocks; my experience would point to the following:—
openaire +3 more sources