Results 31 to 40 of about 2,766 (179)

Spinel crystals in mantle ultramafic xenoliths as the source of P-T conditions of alteration above the magma chamber beneath the Avacha Volcano (Kamchatka)

Journal of Asian Earth Sciences: X, 2022
This study focuses on the ability of spinel crystals in ultramafic xenoliths, like zircon, to store the primary composition and structure when exposed to magma fluid flows or the thermal heating of ultramafic fragments in magma flows during volcanic ...
Viktor Sharapov, Yuri Semenov, Grigory Kuznetsov, Anatoly Boguslavsky   +3 more
doaj   +1 more source

Apatite in Carbonatite Preserving Primary Magmatic, Post‐Magmatic Overgrowth, and Post India‐Asia Collision‐Related Hydrothermal Alteration: Evidenced From U–Pb Isotope and Trace Element Geochemistry

Geological Journal, EarlyView.
U–Pb isotope and trace element geochemistry of apatite from carbonatites of Peshawar Plain Alkaline Igneous Province, western Himalaya shows Permo‐Carboniferous magmatism, an additional magmatic pulse during Cretaceous, and post‐magmatic hydrothermal/metasomatism during Oligocene. ABSTRACT U–Pb isotope and trace element geochemistry of apatite combined
Mehboob ur Rashid, Hafiz U. Rehman, Hao‐Yang Lee, Sun‐Lin Chung, Kaushik Das, Kazumasa Aoki, Muhammad Jawad Zeb, Nasir Ahmad, Muhammad Hussain, Hiroshi Yamamoto   +9 more
wiley   +1 more source

In situ mineralisation of UK onshore igneous rocks offers significant CO2 storage potential

Earth Science, Systems and Society
Safe and permanent storage of CO2 will be required to limit global warming to 1.5–2°C above pre-industrial levels. In situ mineralisation of CO2 within igneous rock formations is a rapid and secure method of geological CO2 storage.
Angus W. Montgomery, Chris M. Holdsworth, Emma Martin-Roberts, Ian Watt, Stuart M. V. Gilfillan   +4 more
doaj   +1 more source

Heterogeneous Exhumation Mechanisms in Neoproterozoic Collisional Metamorphism: P–T Constraints From Pelotas and Punta del Este Terranes, Southern Brazil and Uruguay

Geological Journal, EarlyView.
Petrography, thermobarometry, and pseudosection modelling reveal peak metamorphic conditions of 3–7.5 kbar and 520°C–800°C in Tonian‐Cryogenian orthogneisses of the Dom Feliciano Belt. Metamorphic field gradients of 27°C/km–39°C/km and variable exhumation mechanisms support correlation of these units as remnants of a Himalayan‐type Piratini Orogeny ...
Thaiane Niederauer‐Santos, Carla Cristine Porcher, Daniel Triboli Vieira, Edinei Koester, Diego Jaldín, Karina Luengo, Luisa Caon   +6 more
wiley   +1 more source

Arbuscular mycorrhizal fungi enhance plant performance in trace element‐contaminated soils with element‐specific accumulation patterns

PLANTS, PEOPLE, PLANET, EarlyView.
Soil contamination by toxic trace elements is a growing global challenge that threatens food safety, agricultural productivity, and ecosystem health. We combined results from many experiments worldwide to assess whether beneficial soil fungi can help plants cope with contaminated soils.
Zahraddeen Kabir Sani, Jean Legeay, Mohamed Hijri   +2 more
wiley   +1 more source

Mortars From Punic and Hellenistic–Roman Solunto: Materials, Formulations, and Technology

Archaeometry, EarlyView.
ABSTRACT This study presents an archaeometric investigation of 18 hydraulic rendering and bedding mortars from Punic and Hellenistic–Roman Solunto (NW Sicily). The research aimed to characterize raw materials, reconstruct manufacturing sequences, and evaluate technological proficiency through mineralogical and petrochemical analyses.
G. Montana, G. Polizzi, C. Portale, M. Gasparo Morticelli, L. Randazzo   +4 more
wiley   +1 more source

Southern Carpathian ultramafic grasslands within the central-southeast European context: syntaxonomic classification and overall eco-coenotic patterns

Botanical Studies, 2022
Background Previous investigations carried out in ultramafic habitats emphasized the greater importance of site conditions over soil toxic metal content for vegetation composition.
Gheorghe Coldea, Dan Gafta, Gavril Negrean, Adrian Ilie Stoica, Bogdan-Iuliu Hurdu   +4 more
doaj   +1 more source

Glass from Teniky (Madagascar): Geochemical Evidence for Multiple Production Systems and Long‐Distance Exchange in the Mediaeval Indian Ocean

Archaeometry, EarlyView.
ABSTRACT The inland rock‐cut site of Teniky, located in the Isalo massif of southern Madagascar, represents an exceptional archaeological context recently dated to the 11th–12th centuries ad, corresponding to the early phases of settlement on the island.
Jean Rodier, Bernard Gratuze, Vincent Serneels   +2 more
wiley   +1 more source

Reflectance spectra and AVIRIS-NG airborne hyperspectral data analysis for mapping ultramafic rocks in igneous terrain

Journal of Spectral Imaging, 2022
The layered Sittampundi Anorthosite Complex is covered by mafic and ultramafic rocks including anorthosite, gabbro, pyroxenite and other igneous rocks. The ultramafic terrain has frequently undergone metamorphism.
K. Tamilarasan, S. Anbazhagan, S. Uma Maheswaran, S. Ranjithkumar, K. N. Kusuma, V. J. Rajesh   +5 more
doaj   +1 more source

Talc‐Tempered Pottery From Bala Hissar, Kabul: An Analytical Study

Archaeometry, EarlyView.
ABSTRACT Potsherds of cooking ware excavated at Bala Hissar archaeological site in Kabul were studied using X‐ray fluorescence (XRF), scanning electron microscope‐energy dispersive X‐ray spectrometry (SEM‐EDS), Raman spectroscopy, X‐ray powder diffraction (XRPD), thermogravimetric analysis (TGA) and optical microscopy.
Parviz Holakooei, Babak Rafiei‐Alavi, Hafizullah Hazim, Hasti Pezeshkanjalili, Lara Maritan   +4 more
wiley   +1 more source