scholarly journals Magnetotelluric investigation in the High Agri Valley (southern Apennine, Italy)

2014 ◽  
Vol 2 (11) ◽  
pp. 6747-6773
Author(s):  
M. Balasco ◽  
A. Giocoli ◽  
S. Piscitelli ◽  
G. Romano ◽  
A. Siniscalchi ◽  
...  
Keyword(s):  
Seismic Data ◽  
Southern Italy ◽  
High Resistivity ◽  
Normal Faulting ◽  
Quaternary Deposits ◽  
Valuable Data ◽  
Marine Deposits ◽  
Resistivity Model ◽  
Different Thickness ◽  
Apulia Platform

Abstract. In this paper we present the result of a Magnetotelluric (MT) investigation carried out across the High Agri Valley (HAV), southern Italy. Several MT soundings were carried out in order to obtain a ~15 km long 2-D resistivity model with an investigation depth of ~10 km. The main aim was to provide valuable data on the geological and structural setting of the HAV. The MT model was compared with pre-existing geological, geophysical and seismic data. The MT model can be schematized as a superposition of three stack lateral varying layers with different thickness and resistivity values: a surficial low-medium resistivity layer, associated to the Quaternary deposits and to the allochthonous units, and a deeper high resistivity layer, related to the Apulia Platform, separated by a thin layer connected to the mélange zone and to the Pliocene terrigenous marine deposits. Sharp lateral resistivity variations are interpreted as faults that, on the basis of accurate focal mechanism computations, display normal-faulting kinematics.

scholarly journals Magnetotelluric investigation in the High Agri Valley (southern Apennine, Italy)

2015 ◽  
Vol 15 (4) ◽  
pp. 843-852 ◽  
Author(s):  
M. Balasco ◽  
A. Giocoli ◽  
S. Piscitelli ◽  
G. Romano ◽  
A. Siniscalchi ◽  
...  
Keyword(s):  
Seismic Data ◽  
Southern Italy ◽  
High Resistivity ◽  
Normal Faulting ◽  
Quaternary Deposits ◽  
Valuable Data ◽  
Marine Deposits ◽  
Resistivity Model ◽  
Different Thickness ◽  
Apulia Platform

Abstract. In this paper we present the result of a magnetotelluric (MT) investigation carried out across the High Agri Valley (HAV), southern Italy. Several MT soundings were carried out in order to obtain a ~15 km long 2-D resistivity model with an investigation depth of ~10 km. The main aim was to provide valuable data on the geological and structural setting of the HAV. The MT model was compared with pre-existing geological, geophysical and seismic data. The MT model can be schematized as a superposition of three stack lateral varying layers with different thickness and resistivity values: a surficial low–medium resistivity layer associated with the Quaternary deposits and to the allochthonous units; and a deeper high resistivity layer related to the Apulia Platform, separated by a thin layer connected to the mélange zone and to the Pliocene terrigenous marine deposits. Sharp lateral resistivity variations are interpreted as faults that, on the basis of accurate focal mechanism computations, display normal-faulting kinematics.

scholarly journals Quaternary deposits between the Sukkertoppen ice cap and Nordre Strømfjord

1970 ◽  
Vol 28 ◽  
pp. 23-25
Author(s):  
A Weidick ◽  
N.W Ten Brink
Keyword(s):  
Land Area ◽  
The West ◽  
Quaternary Deposits ◽  
Sea Levels ◽  
West Greenland ◽  
Marine Deposits ◽  
Ice Cap

The area investigated during 1969 is located approximate1y between 66° 10' and 67° 30' N, and 50° and 52° W, the eastem half of the West Greenland ice-free land area transected by Søndre Strømfjord. The principal objectives of the work were to map and describe the glacial and emerged marine deposits for a Quatemary map at 1:500 000 scale, and to collect material for establishing a radiometric chronology of former ice-margin positions and sea levels. In order to study as large an area as possible, the investigations north of Søndre Strømfjord and Sondrestrom Airbase were conducted by A. Weidick, the area south of this by N. W. Ten Brink.

scholarly journals Electrical resistivity tomography applied to geologic, hydrogeologic, and engineering investigations at a former waste-disposal site

Geophysics ◽  
2006 ◽  
Vol 71 (6) ◽  
pp. B231-B239 ◽  
Author(s):  
Jonathan E. Chambers ◽  
Oliver Kuras ◽  
Philip I. Meldrum ◽  
Richard D. Ogilvy ◽  
Jonathan Hollands
Keyword(s):  
Electrical Resistivity ◽  
Electrical Resistivity Tomography ◽  
Site Investigation ◽  
High Resistivity ◽  
Potential Zone ◽  
Resistivity Tomography ◽  
L2 Norm ◽  
Resistivity Model ◽  
2D And 3D ◽  
2D Resistivity

A former dolerite quarry and landfill site was investigated using 2D and 3D electrical resistivity tomography (ERT), with the aims of determining buried quarry geometry, mapping bedrock contamination arising from the landfill, and characterizing site geology. Resistivity data were collected from a network of intersecting survey lines using a Wenner-based array configuration. Inversion of the data was carried out using 2D and 3D regularized least-squares optimization methods with robust (L1-norm) model constraints. For this site, where high resistivity contrasts were present, robust model constraints produced a more accurate recovery of subsurface structures when compared to the use of smooth (L2-norm) constraints. Integrated 3D spatial analysis of the ERT and conventional site investigation data proved in this case a highly effective means of characterizing the landfill and its environs. The 3D resistivity model was successfully used to confirm the position of the landfill boundaries, which appeared as electrically well-defined features that corresponded extremely closely to both historic maps and intrusive site investigation data. A potential zone of leachate migration from the landfill was identified from the electrical models; the location of this zone was consistent with the predicted direction of groundwater flow across the site. Unquarried areas of a dolerite sill were imaged as a resistive sheet-like feature, while the fault zone appeared in the 2D resistivity model as a dipping structure defined by contrasting bedrock resistivities.

Testing geomorphic signal of active normal faulting: The case of the Cittanova Fault (Calabria, southern Italy)

2018 ◽  
Vol 43 (10) ◽  
pp. 2256-2270 ◽  
Author(s):  
Edoardo Peronace ◽  
Marta Della Seta ◽  
Francesco Troiani ◽  
Paolo Galli ◽  
Biagio Giaccio ◽  
...  
Keyword(s):  
Southern Italy ◽  
Normal Faulting

scholarly journals Continued investigations of Quaternary deposits in the area bounded by Søndre Strømfjord, the Inland Ice, and the Sukkertoppen Ice Cap

1971 ◽  
Vol 35 ◽  
pp. 13-17
Author(s):  
N.W TenBrink
Keyword(s):  
Pollen Analysis ◽  
Organic Material ◽  
Field Work ◽  
Quaternary Deposits ◽  
Marine Deposits ◽  
Ice Cap ◽  
Inland Ice

The 1970 project was a continuation of more general 1969 investigations, some results and the objectives of which were reported by Weidick & Ten Brink (1969). The objectives of 1970 field work were to: (1) accurately determine altitudes and characteristics of marine limits; (2) complete a collection of marine shells and organic material from emerged marine deposits in order to derive a radiocarbon-dated delevelling history; (3) obtain cores of sediments from at least three lakes for pollen analysis and C-14 dating of lake-sea isolation times; (4) map in detail some glacial, glaciofluvial, and marine deposits known from 1969 investigations to be particularly important in reconstruction of Holocene events, and (5) conduct a lichenometric survey on young moraines near the lnland lce in order to estimate ages of the moraines. All the field objectives were achieved, and the results that can be stated before completion of analyses are summarised below.

Sign in / Sign up

Export Citation Format

Share Document