Electrical Conductivity Constraints on the Geometry of the Western LATEA Boundary from a Magnetotelluric Data Acquired Near Tahalgha Volcanic District (Hoggar, Southern Algeria)

2018 ◽  
pp. 167-195
Author(s):  
A. Bouzid ◽  
A. Bendekken ◽  
A. Deramchi ◽  
A. Abtout ◽  
N. Akacem ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Magnetotelluric Data

Electrical conductivity imaging of the Philippine Sea upper mantle using seafloor magnetotelluric data

2010 ◽  
Vol 183 (1-2) ◽  
pp. 44-62 ◽  
Author(s):  
Kiyoshi Baba ◽  
Hisashi Utada ◽  
Tada-nori Goto ◽  
Takafumi Kasaya ◽  
Hisayoshi Shimizu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Upper Mantle ◽  
Magnetotelluric Data ◽  
Philippine Sea ◽  
Conductivity Imaging

Electrical Conductivity of the Basement of East European Platform in the Southeastern Ladoga Region from Magnetotelluric Data

2020 ◽  
Vol 56 (6) ◽  
pp. 789-807
Author(s):  
V. A. Kulikov ◽  
E. Yu. Sokolova ◽  
A. P. Ionicheva ◽  
P. Yu. Pushkarev ◽  
A. G. Yakovlev
Keyword(s):  
Electrical Conductivity ◽  
East European Platform ◽  
Magnetotelluric Data ◽  
Ladoga Region ◽  
East European

scholarly journals Regional mineral exploration targeting based on crustal electrical conductivity variations from magnetotelluric data

2012 ◽  
Vol 2012 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Mike Dentith ◽  
Aurore Joly ◽  
Shane Evans ◽  
Stephan Thiel
Keyword(s):  
Electrical Conductivity ◽  
Mineral Exploration ◽  
Magnetotelluric Data

Electrical conductivity structure of north-west Fennoscandia from three-dimensional inversion of magnetotelluric data

2015 ◽  
Vol 653 ◽  
pp. 20-32 ◽  
Author(s):  
M. Cherevatova ◽  
M.Yu. Smirnov ◽  
T. Korja ◽  
L.B. Pedersen ◽  
J. Ebbing ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Three Dimensional ◽  
Magnetotelluric Data ◽  
North West ◽  
Conductivity Structure

scholarly journals Structural and geological studies in the Naryn and Atbashi depressions (Tien Shan) and geological interpretation of magnetotelluric data

2021 ◽  
Vol 929 (1) ◽  
pp. 012007
Author(s):  
E S Przhiyalgovskii ◽  
A K Rybin ◽  
Yu A Morozov ◽  
E V Lavrushina ◽  
M G Leonov ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Sedimentary Cover ◽  
Structural Features ◽  
Geological Structure ◽  
Tien Shan ◽  
Upper Crust ◽  
Seismic Profiles ◽  
Magnetotelluric Data ◽  
Geological Interpretation ◽  
Basement Structures

Abstract The article presents the results of complex geological and geophysical studies in the Naryn depression and Atbashi depression in the Middle Tien Shan. They included the geological interpretation of new magnetotelluric data along the detailed profile crossing the key segment of the Tien Shan, and the study of the morphology and spatial position of the sedimentary cover and basement structures. The compilation of the results of structural-geological and geophysical studies makes it possible to create a 2D model of the upper-crust geological structure, consistent with the structure of the electrical conductivity to depths of about 10 km and to analyze the structural features of deeper horizons. Two types of structural patterns of the electric conductivity, corresponding to the sedimentary complexes of the cover and the folded-metamorphic complexes of the basement, have been identified. Sedimentary rock complexes in depressions have a high electrical conductivity and subhorizontal structure. The upper crust above the K2 density layer is characterized by an alternation of rocks volumes with contrasting conductivity, elongated vertically. The recorded structure of the field confirms the presence of steep zones of fluid permeability and fragmentation, noted earlier in seismic profiles and probably corresponding to the Paleozoic structures of fragmentation of the Earth’s crust, activated during Alpine orogeny. Comprehensive research allow to characterize the deformations of the Cenozoic sedimentary complex and the surface of the Paleozoic basement associated with the Alpine activation of the key segment of the Tien Shan.

Removing Substrate Background in TEM Microanalysis

1974 ◽  
Vol 32 ◽  
pp. 568-569
Author(s):  
John C. Russ ◽  
Nicholas C. Barbi
Keyword(s):  
Electrical Conductivity ◽  
Rapid Growth ◽  
Organic Film ◽  
Absolute Concentration ◽  
Background Signal ◽  
X Ray ◽  
Elemental Concentrations ◽  
Transmission Electron ◽  
Electron Microscopes ◽  
The Continuum

The rapid growth of interest in attaching energy-dispersive x-ray analysis systems to transmission electron microscopes has centered largely on microanalysis of biological specimens. These are frequently either embedded in plastic or supported by an organic film, which is of great importance as regards stability under the beam since it provides thermal and electrical conductivity from the specimen to the grid.Unfortunately, the supporting medium also produces continuum x-radiation or Bremsstrahlung, which is added to the x-ray spectrum from the sample. It is not difficult to separate the characteristic peaks from the elements in the specimen from the total continuum background, but sometimes it is also necessary to separate the continuum due to the sample from that due to the support. For instance, it is possible to compute relative elemental concentrations in the sample, without standards, based on the relative net characteristic elemental intensities without regard to background; but to calculate absolute concentration, it is necessary to use the background signal itself as a measure of the total excited specimen mass.

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