Results 41 to 50 of about 305,731 (212)

ISOTOPE COMPOSITION OF CARBON AND OXYGEN IN CALCITES OF ALKALINE ULTRAMAPHIC DYKES WITHIN THE URIK-IYA GRABEN

Геодинамика и тектонофизика, 2022
The isotope composition of carbon and oxygen was studied in calcite of dykes and veins of ultramafic lamprophyres, kimberlite, alkaline mica picrites from the Yarma above-intrusion zone, and pyroxene-free picrites intruding the rocks of the ...
Yu. V. Danilova, V. B. Savelyeva, E. P. Bazarova, B. S. Danilov, V. A. Ponomarchuk   +4 more
doaj   +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

Composition and Mineralogical Features of Ultramafic Rocks of Eastern Part of Southern Kraka Massif (South Urals)

Georesursy
The paper presents new data on the structure and composition of ultramafic rocks in the eastern part of the South Kraka massif. It is shown that the studied area is composed predominantly of spinel peridotites, among which the main role belongs to ...
D. E. Saveliev, A. I. Biembetov, T. D. Shabutdinov, A. A. Samigullin, R. A. Gataullin   +4 more
doaj   +1 more source

Origin of magnetic fabrics in ultramafic rocks [PDF]

IOP Conference Series: Materials Science and Engineering, 2015
IOP Conference Series: Materials Science and Engineering, 82 (1)
Biedermann A.R., Kunze K., Zappone A.S., Hirt A.M.   +3 more
openaire   +3 more sources

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

Chrome spinel compositions as evidence for an Archaean ophiolite in the Kuhmo greenstone belt in Finland [PDF]

Bulletin of the Geological Society of Finland, 1994
Investigations into chromite compositions in Archaean ultramafic rocks are rare. Most Archaean ultramafic rocks have undergone a multi-stage history of deformation and metamorphism, and therefore fresh primary chromite is rarely preserved.
J. Liipo, J. Vuollo, V. Nykänen, T. Piirainen   +3 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

(Table 6) Concentrations of trace elements in ultramafic rocks from the Markov Deep, Central Atlantic

, 2006
(Table 6) Concentrations of trace elements in ultramafic rocks from the Markov Deep, Central ...
Sergey G Skolotnev (6958661), Skolotnev, Sergey G, Peyve, Alexander A, Nikolay S Bortnikov (6961571), Alexander A Peyve (6958658), G N Savelyeva (6886064), Bortnikov, Nikolay S, Savelyeva, G N   +7 more
core   +1 more source

Plant endemism of the Balkan high‐mountain fens: a community‐level synthesis and their climate change perspective

Plant Biology, EarlyView.
Balkan high‐mountain fens harbour unique endemic plant communities, with a west‐to‐east compositional gradient and local richness primarily shaped by palaeoclimate. As these fens have already experienced drier, warmer summers than at present, they may withstand climate change if actively and effectively protected. Abstract The phenomenon of Balkan high‐
M. Hájek, P. Hájková, M. Chobanova, Z. Plesková, E. Bergmeier, P. Lazarević, D. Szokala, N. Berisha, L. Shuka, D. Dítě, T. Peterka, R. Čusterevska, D. Sopotlieva, J. Divíšek, I. Goia, B. Vrábel, Đ. Milanović, S. Hristovski, D. Stešević, P. Bureš, I. Apostolova   +20 more
wiley   +1 more source

(Table 4) Composition of ore minerals in ultramafic rocks from the Markov Deep, Central Atlantic

, 2006
(Table 4) Composition of ore minerals in ultramafic rocks from the Markov Deep, Central ...
Sergey G Skolotnev (6958661), Skolotnev, Sergey G, Peyve, Alexander A, Nikolay S Bortnikov (6961571), Alexander A Peyve (6958658), G N Savelyeva (6886064), Bortnikov, Nikolay S, Savelyeva, G N   +7 more
core   +1 more source