Results 31 to 40 of about 1,186 (177)

Provenance reconstructions. Article 1. Mineralogical and petrographic approaches and methods

open access: yesЛитосфера, 2020
Research subject. This is the first in the series of four articles, which aims to review existing provenance reconstruction tools.Methods and materials.
A. V. Maslov   +3 more
doaj   +1 more source

87Sr/86Sr chemostratigraphy of Neoproterozoic Dalradian limestones of Scotland and Ireland: constraints on depositional ages and time scales [PDF]

open access: yes, 2004
New calcite <sup>87</sup>Sr/<sup>86</sup>Sr data for 47 limestones from the metamorphosed and deformed Neoproterozoic-Cambrian Dalradian Supergroup of Scotland and Ireland are used to identify secular trends in seawater <sup>
Ellam, R.M.   +3 more
core   +1 more source

Structure of the Earth crust and upper mantle along seismological profile Mezen–Timan–Pechora (MEZTIMPECH)

open access: yesЛитосфера, 2020
Object of study. The article was devoted to investigation of the depth structure of the Earth’s crust and upper mantle along the Mezen–Timan–Pechora seismic profile (MEZTIMPECH), crossing the southern parts of the Mezen syneclise, the Timan ridge and the
V. V. Udoratin
doaj   +1 more source

Neoproterozoic Microfossils from the Margin of the East European Platform and the Search for a Biostratigraphic Model of Lower Ediacaran Rocks [PDF]

open access: yes, 2010
A ca. 600 m thick siliciclastic succession in northern Russia contains abundant and diverse microfossils that document early to middle Ediacaran deposition along the northeastern margin of the East European Platform.
Knoll, Andrew Herbert   +2 more
core   +1 more source

Provenance reconstructions. Article 2. Litho- and isotope-geochemical approaches and methods

open access: yesЛитосфера, 2020
Research subject. In this paper, we consider specific features of the use of litho- and isotopic-geochemical data for the purposes of provenance reconstruction.Methods and materials.
A. V. Maslov   +4 more
doaj   +1 more source

A fishtail well design for cyclic steam injection—A case study from Yarega heavy oil field in Russia

open access: yesEnergy Science &Engineering, Volume 7, Issue 6, Page 2437-2455, December 2019., 2019
The joint application of cyclic steam injection technology with fishtail wells assists in reducing the travel time the mobilized oil takes to arrive at a well perforation. Our results demonstrate that the synergy between these two strategies can further improve recoveries in heavy oil reservoirs. In addition to the technical advantage of this strategy,
German A. Abzaletdinov   +4 more
wiley   +1 more source

TIME CONSTRAINTS ON THE FORMATION OF THE KANDALAKSHA AND KERETSK GRABENS OF THE WHITE SEA PALEO-RIFT SYSTEM FROM NEW ISOTOPIC GEOCHRONOLOGICAL DATA

open access: yesГеодинамика и тектонофизика, 2021
Initially, the age and stratigraphic position of the Tersk formation were determined with respect to the fact that this formation overlaps the Early Proterozoic granitoids.
N. B. Kuznetsov   +10 more
doaj   +1 more source

The Cambrian-Ordovician siliciclastic platform of the Balcarce Formation (Tandilia System, Argentina) : Facies, trace fossils, palaeoenvironments and sequence stratigraphy [PDF]

open access: yes, 2003
The Lower Palaeozoic sedimentary cover of the Tandilia (Balcarce Formation) is made up of thick quartz arenite beds together with kaolinitic claystones and thin fine-grained conglomerates.
Poiré, D. G.   +3 more
core   +2 more sources

Rare Earths in Geological Formations of Central Region of the Dniester River Basin, Republic of Moldova

open access: yesAdvances in Geology, Volume 2015, Issue 1, 2015., 2015
In the different varieties of crystalline basement of Archean and Proterozoic age and in Vendian (Ediacaran) basal layers of platform coverture in the Central Basin of the Dniester River were found relatively high concentrations of Lanthanum, Cerium, Yttrium, Ytterbium, and Scandium.
Aurelia Popuiac, Giovanni Martinelli
wiley   +1 more source

THE ZIRCON CHRONOLOGY OF THE INTRUSIVE MAGMATISM OF THE KANIN PENINSULA

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2018
The Kanin Peninsula is an elevated block of the Timan Ridge where Precambrian sedimentary-metamorphic sequences and magmatic  rocks, intruding them, form the Kanin Kamen Ridge.
V. L. ANDREICHEV   +3 more
doaj   +1 more source

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