EPR dating and evolution of the Elbrus volcano

2005 ◽  
Vol 28 (3-4) ◽  
pp. 331-342 ◽  
Author(s):  
D. G. Koshchug ◽  
V. M. Gazeev ◽  
A. G. Gurbanov ◽  
R. V. Shabalin ◽  
S. V. Vyatkin
Keyword(s):  
Elbrus Volcano ◽  
Epr Dating

EPR dating CO2− sites in tooth enamel apatites by ENDOR and triple resonance

1995 ◽  
Vol 46 (5) ◽  
pp. 311-315 ◽  
Author(s):  
N.V. Vugman ◽  
A.M. Rossi ◽  
S.E.J. Rigby
Keyword(s):  
Tooth Enamel ◽  
Triple Resonance ◽  
Epr Dating

Present condition of Mt. Elbrus volcano

1972 ◽  
Vol 14 (3) ◽  
pp. 230-233 ◽  
Author(s):  
G.N. Kovalev ◽  
Yu.P. Masurenko
Keyword(s):  
Present Condition ◽  
Elbrus Volcano

Development of multiscale seismic monitoring system in the Elbrus volcano region

2015 ◽  
Vol 51 (3) ◽  
pp. 259-266 ◽  
Author(s):  
A. A. Malovichko ◽  
I. P. Gabsatarova ◽  
D. V. Likhodeev ◽  
A. S. Zaklyukovskaya ◽  
D. A. Presnov
Keyword(s):  
Monitoring System ◽  
Seismic Monitoring ◽  
Elbrus Volcano

OSL and EPR dating of pottery from the archaeological sites in Amazon Valley, Brazil

2014 ◽  
Vol 352 ◽  
pp. 176-180 ◽  
Author(s):  
Nilo F. Cano ◽  
Casimiro S. Munita ◽  
Shigueo Watanabe ◽  
Renata F. Barbosa ◽  
José F.D. Chubaci ◽  
...  
Keyword(s):  
Archaeological Sites ◽  
Epr Dating

scholarly journals Geothermal monitoring as a way to predict volcanic eruptions and estimate geothermal energy resources

Georesursy ◽  
2018 ◽  
Vol 20 (4) ◽  
pp. 413-422 ◽  
Author(s):  
A. Muravyev
Keyword(s):  
Geothermal Energy ◽  
Water Injection ◽  
Volcanic Eruptions ◽  
Geothermal Field ◽  
Energy Potential ◽  
The North ◽  
Elbrus Volcano ◽  
Thermodynamic Conditions ◽  
Temperature And Pressure ◽  
Fiber Optic System

Geothermal monitoring is an effective tool for predicting volcanic eruptions, as well as for assessing the geothermal energy potential of geothermal areas. Increased magmatic activity, an indicator of which is the penetration of hot volcanic gases through faults, has been observed in recent years on the Elbrus volcano. Since Elbrus is a year-round resort of world importance, in order to control volcanic and seismic activity, forecast and reduce the risks of eruption and earthquakes, it is recommended to drill a observation well on the slope of Elbrus with the installation of an underground fiber-optic system for temperature and pressure monitoring. In combination with microseismic, gravimetric and inclinometric observations, satellite IR imaging and geochemical gas testing, the continuously obtained information on the thermodynamic conditions of the subsoil will provide a reliable complex for the operational forecast of natural geophysical disasters. Utilization of the geothermal energy of the magma chamber in the artificial circulation systems of small GeoPPs, water injection from the surface and obtaining superheated water and steam from producing wells will reduce the risks of eruption and at the same time provide the resort with environmentally friendly thermal and electric power. Technological justification for the construction of a GeoPP will also require exploratory drilling to the area of ​​hot rocks, therefore information on the distribution of temperature and pressure along the wellbore is doubly valuable. In geothermal fields that are under development, to assess the spatial heterogeneity of the filtration characteristics can be a useful method of “thermal interference testing” – as a complement or alternative to hydrodynamic interference testing. It is recommended to conduct such an experiment at the North Mutnovsky geothermal field.

scholarly journals Possibilities of radiocarbon (14C) method for age determination of geological events in the Elbrus volcanic centre area

2021 ◽  
Author(s):  
А.Г. Гурбанов ◽  
В.М. Газеев ◽  
О.А. Гурбанова
Keyword(s):  
Seismic Activity ◽  
Age Determination ◽  
Volcanic Area ◽  
Volcanic Centre ◽  
Elbrus Volcano ◽  
Important Relationship ◽  
Buried Soil

Радиоуглеродный метод (14С) позволяет датировать геологические события по детриту и древним углям из погребенных почв, начиная с 40-50 тыс. лет тому назад и до сотен лет. Однако для его широкого применения в пределах Эльбрусского вулканического центра (высота вулканической постройки 5 642 м), при датировании времени излияния отдельных лавовых потоков, имеются объективные ограничения. Они заключаются в том, что начиная с отметки от 3 300 м и выше в горах Северного Кавказа отсутствует травяно-кустарниковая растительность и почвенный слой с гумусом, и именно на этих высотах расположе- на значительная часть голоценовых лавовых потоков и туфовых горизонтов Эльбруса, а с 3 700 м и выше вулканическая постройка покрыта вековыми ледниками и снежниками. В результате проведенных исследо- ваний для голоцена были установлены: частоты повторяемости извержений вулкана Эльбрус и землетря- сений, проявившихся в Приэльбрусье. В итоге была выявлена важная закономерность, свидетельствующая о том, что к концу голоцена частоты повторяемости извержений Эльбруса и землетрясений резко воз- растают. Установлено совпадение времени проявления вулканической и сейсмической активности (причем вторая проявлялась несколько раньше первой). При этом периоды вулканической и сейсмической активности резко возрастают, а периоды покоя сокращаются. Эти данные имеют важное значение для оценки возмож- ности возобновления вулканической и сейсмической активностей в пределах Приэльбрусья в геологическом будущем. Radiocarbon (14C) method makes possible to dating of geological events on detritus and older coals from buried soil from 40-50 thousands years ago up to hundreds years. However, for its wide applica-tion within of Elbrus volcanic centre (altitude of Elbrus volcano is 5642 m) for dating time of separate lava fl ows eruption, there are an objective boundaries. They are implies that starting with altitude of 3300 m and higher in the Northern Caucasian mountains the grass and handicraft and soil with humus are absent, and just on this altitude the most part of Holocene lava fl ows and tuff horizons are located and with 3700 m and higher volcano is covered by glaciers and perpetual snow (fi rn). As a result of carried out investigation for Holocene the density of recurrence of Elbrus volcano eruptions and earthquakes manifestation in Elbrus volcanic area have been established. As a sum the important relationship, testifi es that to the end of Holocene the density of recurrence of Elbrus eruptions and earthquakes are sharply increase. Agreement in time between volcanic and seismic activity (but manifestation the second one was some early then fi rst one). In so doing, periods of volcanic and seismic activity are sharply increase, but periods of rest are shrink. This data have an important relationship for estimation possibility of restating of volcanic and seismic activities in Elbrus volcanic area in geological future.

Activity of Elbrus Volcano (North Caucasus)

2004 ◽  
Vol 6 (4) ◽  
pp. 279-291
Author(s):  
A. G. Gurbanov ◽  
A. L. Sobisevich ◽  
L. E. Sobisevich ◽  
Yu. N. Nechaev ◽  
V. N. Arbuzkin ◽  
...  
Keyword(s):  
North Caucasus ◽  
Elbrus Volcano

Silicon isotopes as tracers of laterite formation processes through time and space

2020 ◽  
Author(s):  
Damien Guinoiseau ◽  
Julien Bouchez ◽  
Zuzana Fekiacova ◽  
Thierry Allard ◽  
Claire Ansart ◽  
...  
Keyword(s):  
Chemical Weathering ◽  
Amazon Basin ◽  
Clay Fraction ◽  
Outer Part ◽  
Silicon Isotopes ◽  
Tropical Conditions ◽  
Material Forming ◽  
Mass Transfers ◽  
Epr Dating ◽  
Primary Minerals

<p><span>Lateritic soils are deep weathering profiles, developed in tectonically quiescent areas under tropical conditions and over long timescales. Laterites are key components in the regulation of element cycle in the Earth’s history but, the timing between climatic changes and lateritic weathering episodes remains unconstrained. The combination of chronometric and weathering proxies is one way to build a comprehensive story of laterite formation.</span></p><p><span>In this study, two lateritic vertical profiles were targeted on the outer part of the Guyana Shield in the Amazon Basin. This region is tectonically stable and subjected to a rainy tropical climate since the Cretaceous. The first soil profile, located in the Brownsberg Mountains, Suriname, is developed on Proterozoic Greenstone [1]. The second lateritic cover, already studied and dated using EPR technique [2], is developed over the Cretaceous sedimentary Alter do Chao formation, Brazil. Both lateritic profiles are characterized by 1/ a total depletion of soluble elements and weathering of primary minerals at the base of the profile and 2/ a desilication followed by the formation of Fe and Al duricrusts on top. Here, traditional geochemical budgets are seconded by measurements of Si isotopes in both soils (bulk and/or clay fractions) and laterite draining streams. Silicon isotopes (δ</span><sup><span>30</span></sup><span>Si) are known to be an excellent weathering proxy, fractionated during clay mineral formation [3]. </span></p><p><span>In Suriname bulk soils, heavier δ</span><sup><span>30</span></sup><span>Si is associated with lateritization due to the “buffering” quartz exerts on bulk δ</span><sup><span>30</span></sup><span>Si. However, if clay fractions are isolated, the observed strong enrichment in light Si (Δ</span><span>δ</span><sup><span>30</span></sup><span>Si<sub>clay fraction-bedrock</sub> up to -0.9‰) is in line with the weathering of primary minerals and the formation of kaolinite. The dating of this intense weathering episode is c.a. 2-9 Ma based on preliminary EPR dating of kaolinites. </span></p><p><span>Regarding the Brazilian laterite, the material forming the Alter do Chao formation already suffered weathering episodes before deposition. The combination of EPR dating [2] and δ</span><sup><span>30</span></sup><span>Si measurements on the clay fraction reveals two distinct formation phases. First, chemical weathering is limited to the 37-22 Ma period. Second, the progressive depletion of</span><span> δ</span><sup><span>30</span></sup><span>Si from the bottom to the top of the lateritic profile highlights a replacement of a first kaolinite generation by a second population through dissolution-reprecipitation around 6 Ma, as previously inferred by EPR dating [2]. </span></p><p><span>These results, in combination with elemental mass budgets, give us better constraints to estimate the intensity and the timing of element mass transfers during laterite formation.</span><span> </span></p><p><span>[1] Monsels & van Bergen (2017) <em>Journal of Geochemical Exploration </em>180, 71-90. [2] Balan et al. (2005) <em>GCA</em> 69 (9), 2193-2204. [3] Opfergelt & Delmelle (2012) <em>Comptes Rendus Geoscience</em> 334 (11), 723-738.</span></p>

scholarly journals Mechanism of Gd3+ uptake in gypsum (CaSO4·2H2O): Implications for EPR dating, REE recovery and REE behavior

2019 ◽  
Vol 258 ◽  
pp. 63-78 ◽  
Author(s):  
Jinru Lin ◽  
Mark J. Nilges ◽  
Eli Wiens ◽  
Ning Chen ◽  
Shaofeng Wang ◽  
...  
Keyword(s):  
Epr Dating
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