scholarly journals Assessment of Seismogeodynamic Activity of Mining Areas on the Basis of 3D Geoinformation Modeling

2021 ◽  
Vol 21 (6) ◽  
pp. 1-12
Author(s):  
V. A. Petrov ◽  
◽  
V. A. Minaev ◽  
S. A. Ustinov ◽  
I. O. Nafigin ◽  
...  
Keyword(s):  
Active Fault ◽  
Surface Displacement ◽  
Nuclear Material ◽  
Mining Areas ◽  
Oil Pipelines ◽  
Geoinformation Modeling ◽  
External Causes ◽  
Information Basis ◽  
Natural Component

The article deals with the creation of an information and analytical platform for assessing external causes of technogenic (man-made) accidents and for improving methods of their predication and prevention on the territories of long-term geological, mining, and engineering activities on the Southeastern (SE) Transbaikal region example — one of the key areas for mining and extraction of the strategic raw minerals in Russia. 3D modeling of active geological structures and hazardous seismogeodynamic processes on GIS-based technologies is a key instrument for forecasting dangerous natural and technogenic events and risk reduction of their occurrence. A matter of minimizing consequences of natural and technogenic disasters for such facilities of increased technological and environmental hazards as minefields, radiochemical facilities, sites for spent nuclear material disposal, dams, gas and oil pipelines, etc. has become essential. It is necessary to assess modern geodynamic territory’s activity on a unified geoinformation platform applying the newest integrated geological-geophysical researches’ methods for these objects, to select seismically active fault-fracture zones, to determine the rate and direction of surface displacement, to establish patterns of subsoil stressed-strained state natural component influence on behavior of local technogenic processes. Taking into account the specificities of geotectonic structure of mining territories, the structure of monitoring seismogeodynamic processes network on multifunctional geodynamic test sites should be developed. Observations made on test sites form the information basis for forecasting of lithosphere condition, taking decisions on rational subsurface management and providing ecological safety of the territory.

scholarly journals Active Fault Systems in the Inner Northwest Apennines, Italy: A Reappraisal One Century after the 1920 Mw ~6.5 Fivizzano Earthquake

Geosciences ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 139
Author(s):  
Giancarlo Molli ◽  
Isabelle Manighetti ◽  
Rick Bennett ◽  
Jacques Malavieille ◽  
Enrico Serpelloni ◽  
...  
Keyword(s):  
Large Scale ◽  
Active Fault ◽  
Active Faults ◽  
Dense Network ◽  
Earthquake Fault ◽  
Slip Rates ◽  
Fault Systems ◽  
Seismological Data ◽  
Seismogenic Faults

Based on the review of the available stratigraphic, tectonic, morphological, geodetic, and seismological data, along with new structural observations, we present a reappraisal of the potential seismogenic faults and fault systems in the inner northwest Apennines, Italy, which was the site, one century ago, of the devastating Mw ~6.5, 1920 Fivizzano earthquake. Our updated fault catalog provides the fault locations, as well as the description of their architecture, large-scale segmentation, cumulative displacements, evidence for recent to present activity, and long-term slip rates. Our work documents that a dense network of active faults, and thus potential earthquake fault sources, exists in the region. We discuss the seismogenic potential of these faults, and propose a general tectonic scenario that might account for their development.

scholarly journals Diagenetic formation of uranium-silica polymers in lake sediments over 3,300 years

2021 ◽  
Vol 118 (4) ◽  
pp. e2021844118
Author(s):  
Pierre Lefebvre ◽  
Alkiviadis Gourgiotis ◽  
Arnaud Mangeret ◽  
Pierre Sabatier ◽  
Pierre Le Pape ◽  
...  
Keyword(s):  
Contaminated Sediments ◽  
Mining Areas ◽  
Subsurface Environments ◽  
Geochemical Reactivity ◽  
High Silica ◽  
Long Term Behavior ◽  
The Impact ◽  
X Ray Absorption

The long-term fate of uranium-contaminated sediments, especially downstream former mining areas, is a widespread environmental challenge. Essential for their management is the proper understanding of uranium (U) immobilization mechanisms in reducing environments. In particular, the long-term behavior of noncrystalline U(IV) species and their possible evolution to more stable phases in subsurface conditions is poorly documented, which limits our ability to predict U long-term geochemical reactivity. Here, we report direct evidence for the evolution of U speciation over 3,300 y in naturally highly U-enriched sediments (350–760 µg ⋅ g−1 U) from Lake Nègre (Mercantour Massif, Mediterranean Alps, France) by combining U isotopic data (δ238U and (234U/238U)) with U L3-edge X-ray absorption fine structure spectroscopy. Constant isotopic ratios over the entire sediment core indicate stable U sources and accumulation modes, allowing for determination of the impact of aging on U speciation. We demonstrate that, after sediment deposition, mononuclear U(IV) species associated with organic matter transformed into authigenic polymeric U(IV)–silica species that might have partially converted to a nanocrystalline coffinite (UIVSiO4·nH2O)-like phase. This diagenetic transformation occurred in less than 700 y and is consistent with the high silica availability of sediments in which diatoms are abundant. It also yields consistency with laboratory studies that proposed the formation of colloidal polynuclear U(IV)–silica species, as precursors for coffinite formation. However, the incomplete transformation observed here only slightly reduces the potential lability of U, which could have important implications to evaluate the long-term management of U-contaminated sediments and, by extension, of U-bearing wastes in silica-rich subsurface environments.

scholarly journals Average annual background quantity of chemical elements and organic matter in the streams of the "River" environment flowing into Lake Baikal reservoirs

2020 ◽  
Vol 5 (4) ◽  
pp. 433-447
Author(s):  
Olga Yu. Astrakhantseva ◽  
◽  
Oleg Yu. Palkin ◽  
Keyword(s):  
Organic Matter ◽  
Lake Baikal ◽  
Chemical Elements ◽  
The South ◽  
River Flows ◽  
Chemical Balance ◽  
Biogenic Components ◽  
Annual Amount ◽  
Natural Component

The aim of the article is to assess the average long-term background hydrochemical input of chemical elements and organic matter from the flows of the natural component of the environment "Rivers" flowing into the South, Selenginsky, Middle and North reservoirs of Lake. Baikal. The results of calculation of the average annual amount (g/year) of chemical elements and organic matter (Na+, K+, Ca2+, Mg2+, Al, Si, Mn2+, Feобщ , SO42-, HCO3-, Cl-, NO3-, PO43-, Cr, Cu, Cd, Hg, Pb, Sr, Zn, Co, U, V, Mo, Cорг, Nорг, Pорг, Sорг, CO2, Ti) in the streams of the natural component of the environment "Rivers" flowing into the South, Selenginsky, Sredniy, Severny reservoirs of Lake Baikal are presented. The scale of the river chemical input into the reservoirs and the contribution of the "River" flows to the chemical balances of these reservoirs have been determined. It has been established that only in the Selenga reservoir the rivers carry a significant amount of matter (about 3%). The contribution of river flows to the chemical balance of the reservoir is 3.54; 5.4; 17.5 and 21.5% in the South, Selenga, Middle and North reservoirs, respectively. The rivers flowing into the Selenga reservoir carry 70.6% of the total amount of matter brought by the rivers into the lake. Whereas the rivers of the Northern, Middle and Southern reservoirs carry 14.0; 11.6 and 3.8% of the matter. Only in the Selenga and Northern reservoirs, the rivers (tributaries) are the main sources of macrocomponents (K+, Na+, Ca2+, SO42-, CO3-, Cl-), a number of microcomponents (Rb, Mo, Hg, Sr, and Cu and Zn in the Selenga river-), organic matter (Corgг, Norg, Porg), and biogenic components in the Selenga reservoir (NO3-).

Comprehensive Assessment of the Geoecological Situation of Mining Areas (on the Example of Solikam Urban District)

2020 ◽  
Vol 24 (2) ◽  
pp. 46-51
Author(s):  
E.A. Karfidova ◽  
V.M. Makeev ◽  
A.P. Sizov ◽  
I.M. Kravchenko
Keyword(s):  
Open Data ◽  
Management Program ◽  
Google Earth ◽  
Urban District ◽  
Scientific Publications ◽  
Mining Areas ◽  
State Register ◽  
State Registration ◽  
Information Basis ◽  
Mining Regions

The methods for the complex assessment of the geoenviromental situation in a mining region based on the integration of open data from the ROSREESTR (The Federal Service For State Registration, Cadastre And Cartography), the ROSPRIRODNADZOR (Federal Service for Supervision of Natural Resources), Google Earth, scientific publications and other sources, in particular, related to the analysis of neotectonic and geodynamic problems in the region are considered. The conclusions are made as a result of the analysis of the geoenviromental situation on the example of the Solikamsk urban district and the recommendations are proposed: a land management program and the formation of geoecological data in the Unified State Register of Real Estate quarters (polluted, degraded and disturbed lands) - as an information basis for the regional model of spatial planning of mining regions.

Obama's push on nuclear arms control faces hurdles

2016 ◽  
Keyword(s):  
Arms Control ◽  
The United States ◽  
Nuclear Material ◽  
Content Type ◽  
High Profile ◽  
The Us ◽  
Nuclear Security ◽  
Nuclear Opacity ◽  
Nuclear Arms Control

Subject The US arms control agenda. Significance Despite having less than a year in office, President Barack Obama's administration is sustaining a high-profile arms control agenda in 2016. The administration wants to restore several damaged treaties with Russia, broaden Russia-China-US cooperation on various non-proliferation issues and leave Obama's successor a firm nuclear security architecture. Arms control is a consultative, long-term diplomatic process, and is susceptible to the political imperatives of more immediate regional crises. Impacts Tacit US support of Israeli nuclear opacity will undermine arms control efforts in the Middle East. Post-Obama arms control efforts are likely to focus on the security of nuclear material, rather than strategic arms reductions. Senate retirements will undermine US arms control advocacy in Congress. The United States will retain its nuclear arsenal indefinitely despite criticism from its allies.

Inspection and Rehabilitation of Crude Oil Pipelines in Eastern Europe and the FSU

1998 ◽  
Author(s):  
Adolf H. Feizlmayr ◽  
Helmut J. Fassl
Keyword(s):  
Crude Oil ◽  
Environmental Pollution ◽  
Eastern Europe ◽  
Economic Sustainability ◽  
Project Approach ◽  
Safety Standards ◽  
Safety Requirements ◽  
Oil Pipelines ◽  
The Individual

Major leakages occurred during the last years demonstrate the risk involved with older pipeline systems in Eastern Europe and the FSU, which for the most part are not operated and maintained in accordance with nowadays safety standards. The typical project approach to standardize the individual subsystem rather than engineering a customized approach, and unclear operating procedures are main causes for this situation. Having little or no detailed information on condition of the individual systems makes it difficult to evaluate the risks involved. However, certain measures contribute to make a reasonable statement on the reliability of the system, to reduce the risk of environmental pollution significantly and to bring long term economic sustainability. Using the experience gained through actual projects and with an individually well considered approach, a rehabilitation project in the FSU can be adequately assessed and carried out to ensure optimum deferred expenditure while meeting all relevant environmental and safety requirements.

Zinc deficiency in wheat and lupins in Western Australia is affected by the source of phosphate fertiliser

1992 ◽  
Vol 32 (4) ◽  
pp. 455 ◽  
Author(s):  
MM Riley ◽  
JW Gartrell ◽  
RF Brennan ◽  
J Hamblin ◽  
P Coates
Keyword(s):  
Western Australia ◽  
Zn Deficiency ◽  
Single Superphosphate ◽  
Rock Phosphates ◽  
Phosphate Fertiliser ◽  
Leaf Tissues ◽  
Natural Component ◽  
Residual Effectiveness ◽  
Term Field

A long-term field experiment is being conducted in the wheatbelt of Western Australia to determine the effects of source of phosphate fertiliser on the residual effectiveness of zinc (Zn) to wheat and to sweet, narrow-leafed lupins grown in rotation. The initial 2 years' results of that experiment reported here indicate that both wheat and lupins responded to the addition of Zn to the soil. The requirements of these crops for Zn, can be mostly met with the small amount of Zn that is a natural component in single superphosphate manufactured from rock phosphates, but not with diammonium phosphate (DAP). The internal requirements for Zn of the aboveground tissues of lupins appear greater than those of wheat. Depending on the stage of growth, critical concentrations of Zn in the youngest leaf tissues of wheat that were prognostic of Zn deficiency, were found to vary from about 7 to 16 �g/g, while those in lupins were found to vary from about 28 to 37 �g/g.

Estimating surface displacement in the Hanshin area, Japan, by PS-InSAR analysis using satellite Sentinel-1 data

2021 ◽  
Author(s):  
Yutaro Shigemitsu ◽  
Kazuya Ishitsuka ◽  
Weiren Lin
Keyword(s):  
Fault Zone ◽  
Groundwater Level ◽  
Active Faults ◽  
Surface Displacement ◽  
Sar Interferometry ◽  
Surface Displacements ◽  
Active Segment ◽  
2018 Northern Osaka Earthquake ◽  
Groundwater Level Changes

<p>The 2018 northern Osaka earthquake with a magnitude 6.1 earthquake struck on June 18, 2018 in northern Osaka, causing enormous damage. SAR interferometry using satellite synthetic aperture radar (SAR) data can detect surface displacement distribution over a wide area and is effective for observing surface displacement during an earthquake. On the other hand, it is also important to observe the tendency of long-term surface displacement around active faults on a yearly basis in order to monitor the deformation at and around active faults. In this study, we used persistent scatter SAR interferometry (PS-InSAR) to clarify the recent surface displacement including before and after the 2018 northern Osaka earthquake near the Arima-Takatsuki Fault Zone and the Mt. Rokko active segment, near the epicenter of the earthquake. PS-InSAR analysis is a method that analyzes coherent pixels only, and can extract surface displacements with less noise than the conventional two-pass SAR interferometry. By using Sentinel-1 data, we expect to understand a long-term surface displacement and temporal changes in displacement pattern by comparing with the results using other satellites in previous studies. As a result of our analysis, we found that (i) ground subsidence occurred near the Mt. Rokko active segment, (ii) subsidence or eastward displacement occurred in the eastern part of the Takarazuka GNSS station, (iii) surface displacement in the wedge-shaped area located between the Arima-Takatsuki Fault Zone and the Mt. Rokko active segment is suggested to be caused by groundwater level changes, (iv) groundwater level changes may have caused surface displacement considered to be uplift in the wide area between the Ikoma Fault Zone and Uemachi Fault Zone, and (v) slip of the source fault may have caused surface displacement around the epicenter of the 2018 northern Osaka earthquake. Furthermore, we validated the estimated surface displacements by comparison with GNSS measurements and previous studies. These results suggest that surface displacement near the Arima-Takatsuki fault zone was caused by the 2018 northern Osaka earthquake. In order to reveal the mechanism of surface displacement in the vicinity of the fault, it is necessary to continue to monitor the surface displacement in this area using time-series SAR interferometry.</p><p> </p><p> </p><p>We acknowledge Sentinel-1 data provided from the European Space Agency (ESA) based on the open data policy.</p>

Inquests, inquiries and indictments: the official reception of death by disaster

Legal Studies ◽  
1991 ◽  
Vol 11 (1) ◽  
pp. 71-84 ◽  
Author(s):  
Celia Wells
Keyword(s):  
Public Perceptions ◽  
Political Systems ◽  
The Subject ◽  
External Causes

In this essay I consider the reception, perception and construction of deaths by disaster. Catastrophies such as those at Aberfan, Zeebrugge and Hillsborough present a challenge to legal and political systems. They prompt immediate and long-term responses. Some of these are concerned with establishing the cause, some with preventing their recurrence and others with blame allocation. There have been public and not so public inquiries into them. In some cases there have been criminal prosecutions with suggestions of scapegoating, but all these disasters have one thing in common. They have been the subject of an inquest. To be more precise, each death has been the subject of an inquest, as are the 18,000 deaths from external causes, injuries or poisoning, which occur every year. Here I focus in particular on the role of the coroner's inquest and its relationship with other forms of public investigation in shaping public perceptions of disasters.

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