Results 21 to 30 of about 7,031 (168)
Yankuang ceshi, 2018 BACKGROUND Determination of strontium (Sr) and neodymium (Nd) isotopic composition in geological samples by Multi-collector Inductively Coupled Plasma-Mass Spectrometry (MC-ICP-MS) needs a lengthy and complex chemical preparation procedure.
YUAN Yong-hai +4 more
doaj +1 more source
Prospects for identifying the Mississippi Valley type deposits in the North-East of Russia
Литосфера, 2020 Research subject. The Mississippi Valley type deposits make up about a third of the global balance of lead and zinc reserves, resources and production.
A. L. Galyamov +4 more
doaj +1 more source
Lithosphere, 2022 Although pegmatites are volumetrically minor in the upper continental crust, these rocks host abundant rare metal deposits (e.g., Li, Be, Rb, Ta, and Nb).
Xiao Liu +9 more
doaj +1 more source
TITANOMAGNETITE ORES: MINERAL COMPOSITION AND MÖSSBAUER SPECTROSCOPY [PDF]
Минералогия, 2017 Chemical and mineral composition of ilmenite-titanomagnetite ores from Chiney, Sludinsky, Bystrinsky and Kruchininsky deposits (East Siberia) are studied and compared with those from the Panzhihua pluton in China using microprobe and X-ray diffraction ...
V.P. Lyutoev +5 more
doaj
Frontiers in Earth Science, 2023 Introduction: The North Qilian orogenic belt, as the Northern branch of the original Tethys tectonic domain, is important for reconstructing the tectonic evolution of the ancient Tethys.
Hao Tian +12 more
doaj +1 more source
Modification of Pulse Decay Method for Determination of Permeability of Crystalline Rocks
Inventions, 2023 An improvement of the pulse decay method of rock permeability measurement is presented. The technique is based on fitting experimental data to analytical and numerical solutions of the filtration equations derived with regard to the variation of flowing ...
Victor I. Malkovsky +2 more
doaj +1 more source
Differentiation and Ore-deposits [PDF]
Geological Magazine, 1920 AT the present time most mining geologists appear to be in general agreement on the principle that primary ore-deposits are derived from igneous magmas. Furthermore, it is now almost universally recognized that the segregation and concentration of the metals and their compounds into payable ore-deposits is but part of a larger and more fundamental ...
openaire +2 more sources
Radioecological and geochemical peculiarities of cryoconite on Novaya Zemlya glaciers
Scientific Reports, 2021 In recent years, cryoconite has received growing attention from a radioecological point of view, since several studies have shown that this material is extremely efficient in accumulating natural and anthropogenic radionuclides.
Alexey Miroshnikov +6 more
doaj +1 more source
Russian Journal of Earth SciencesThe results of a comprehensive analysis of fault tectonics of the Kola Peninsula, carried out on a regional scale, are considered. Based on a digital relief model, generalized for various scale levels, lineaments were identified manually and ...
Minaev Vasilii +4 more
doaj +1 more source
THE UNIQUE Y-ZIRCON FROM THE ICHET′YU POLYMINERAL OCCURRENCE (CENTRAL TIMAN) [PDF]
Минералогия, 2015 The morphology, composition, color CL, age, and the source of zircon of the Ichet′yu occurrence are studied. The U-Pb age of zircons from the occurrence widely varies from 2247 and 1478 Ma with a difference of 700 Ma within the Paleo-Mezoproterozoic. The
A.B. Makeev +4 more
doaj