Results 31 to 40 of about 2,647 (217)
西南日本の熱変成超苦鉄質岩体中のかんらん石と輝石の組成変化に関する覚書 [PDF]
, 2010 This short article presents some diagrams showing the compositional variations of primary and metamorphic olivine, orthopyroxene and clinopyroxene in peridotites and serpentinites from thermally metamorphosed ultramafic complexes in SW Japan. In contrast
Nozaka, Toshio
core +1 more source
Geological Journal, EarlyView.The rhyolitic ignimbrite and K‐feldspar granite porphyry from the Wangmushan mining district, northern Fujian yield ages of 173.8 ± 0.8 and 102.6 ± 0.4 Ma, respectively. Geochemical data, zircon trace elements, whole‐rock Sr–Nd–Pb isotope data, and zircon Hf isotopic compositions indicate that the rhyolitic ignimbrite originated from partial remelting ...
Wei Shaogang +7 more
wiley +1 more source
Известия Томского политехнического университета: Инжиниринг георесурсов, 2017 Ultramfits of the studied territory are perspective on detection of Cu-Ni with platinum-group elements deposits that causes the relevance of their research. The main aim of the study.
Aleksey Ivanovich Chernyshov +2 more
doaj +2 more sources
GeoresursyThe 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 +4 more
doaj +1 more source
Geochemistry, Geophysics, Geosystems, 2021 Subduction initiation processes, such as those evidenced in the Izu‐Bonin‐Mariana (IBM) forearc crust are a key feature of modern‐style plate tectonics.
Si‐Fang Huang +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 +4 more
wiley +1 more source
Syn- and epigenetic nickel mineralization in the Kamchatka plutonic mafite-ultramafite formations
Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2019 The paper presents data on known objects in the sulfide copper-nickel ore formation in Kamchatka, as well as other ore occurrences and points of nickel mineralization related to certain magmatic formations.
Novakov R.M.
doaj +1 more source
The structure and cryptic layering of the Pados-Tundra ultramafic complex, Serpentinite belt, Kola Peninsula, Russia [PDF]
Bulletin of the Geological Society of Finland, 2017 The Paleoproterozoic Pados-Tundra ultramafic complex, ~6 x 1.5-2.1 km in size and ~2.1 Ga in age, located in the Kola Peninsula of Russia, is the main representative of the Serpentinite belt in the northern Fennoscandian Shield.
A.Y. Barkov, A.A. Nikiforov, R.F. Martin
doaj +1 more source
, 2010 Three-dimensional thermo-chemical mantle convection simulations with mineral assemblages self-consistently calculated using free energy minimization are used to check the sensitivity of model behavior to the assumed compositions of mid-ocean ridge basalt
Paul J. Tackley +7 more
core +1 more source
Thermal and Transport Properties of Mafic and Ultramafic Rocks of Oman Ophiolite
Sultan Qaboos University Journal for Science, 2016 Thermal and other physical properties of rocks and minerals are of considerable significance for deriving mineralogical and compositional models of the Earth's mantle.
Sayyadul Arafin, Ram N. Singh
doaj +1 more source