_Interpretation of Gravity and Geomagnetic Maps- B_PP_03
5
Interpretation of gravity and geomagnetic maps of Timok ign eous co mpl ex ( Ea stern Serbi a) Authors: M. Vanic ( 1 ), A. Nestorovic ( 1 ) S. Doroskov ( 1 ) M. Blagojevic ( 1 ) G. Runjevac ( 1 ) ( 1 ) Belgrade University, Faculty of Mining and Geology, Dept. of Applied Geophysics, Serbia Summary Interpretation of geophysical data, gravimetric and geomagnetic, performed for the area of the northern part of Timok igneous complex, is presented in the paper. Research area belongs to the central part of the Carpatho – balkanides, eastern Serbia. The aim was to perform detailed structural and geological analysis of research area, based on data of the acceleration of gravity anomalies, as well as data on the anomalies of vertical component of the Earth's magnetic field ( ΔZ). In the paper, the following applied mathematical transformations are presented: filtering, elimination of regional phone, calculate the higher derivative, analytical extension of the field. According to detailed analysis of geophysical maps, existence of acid igneous rocks, widespread in this research area, mostly underneath the sediments, was defined. According to the analysis of geophysical maps, igneous rocks in the form of smaller bodies, which are concentrated near the fault, are present under sedimentary rocks. Introduction Interpretation of geophysical data, gravimetric and geomagnetic, performed for the area of the northern part of Timok igneous complex is shown in the paper. The aim of exploration was to perform detailed structural and geological analysis of research area, based on data of the acceleration of gravity anomalies, as well as data on the anomalies of vertical component of Earth's magnetic field ( ΔZ). Research area belongs to the central part of the Carpatho – balkanides, eastern Serbia. It is situated between 44 ° and 44 ° 20 ' north latitude and be tween 21° 49' and 22° 15 ' north long itude. Investigation area is characterized by complex geological structure, which was presented by metamorphic, igneous and sedimentary rocks, which have been formed during the long geological history. Methodology For making maps of Bougue’s anomalies, the average density of rock mass of 2.60 t/m was used. The 3 average density of poin ts for the entire field is 1-point to 1 km . Analysis of geomagnetic data is based 2 on the examination of anomalies of vertical component of the Earth magnetic fields. The average density of points for the entire field is 1 point to 4 km . 2
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Transcript of _Interpretation of Gravity and Geomagnetic Maps- B_PP_03
7302019 _Interpretation of Gravity and Geomagnetic Maps- B_PP_03
httpslidepdfcomreaderfullinterpretation-of-gravity-and-geomagnetic-maps-bpp03 14
Interpretation of gravity and geomagnetic mapsof Timok igneous complex (Eastern Serbia)
Authors M Vanic (1) A Nestorovic (
1) S Doroskov (
1) M Blagojevic (
1) G Runjevac (
1)
(
1
) Belgrade University Faculty of Mining and Geology Dept of Applied Geophysics Serbia
Summary
Interpretation of geophysical data gravimetric and geomagnetic performed for the area of thenorthern part of Timok igneous complex is presented in the paper Research area belongs to thecentral part of the Carpatho ndash balkanides eastern Serbia The aim was to perform detailed structuraland geological analysis of research area based on data of the acceleration of gravity anomalies aswell as data on the anomalies of vertical component of the Earths magnetic field (ΔZ) In the paperthe following applied mathematical transformations are presented filtering elimination of regional
phone calculate the higher derivative analytical extension of the field According to detailed analysisof geophysical maps existence of acid igneous rocks widespread in this research area mostlyunderneath the sediments was defined According to the analysis of geophysical maps igneous rocksin the form of smaller bodies which are concentrated near the fault are present under sedimentaryrocks
Introduction
Interpretation of geophysical data gravimetric and geomagnetic performed for the area of thenorthern part of Timok igneous complex is shown in the paper The aim of exploration was to performdetailed structural and geological analysis of research area based on data of the acceleration of gravityanomalies as well as data on the anomalies of vertical component of Earths magnetic field (ΔZ)Research area belongs to the central part of the Carpatho ndash balkanides eastern Serbia It is situated
between 44 deg and 44 deg 20 north latitude and between 21deg 49 and 22deg 15 north longitude
Investigation area is characterized by complex geological structure which was presented bymetamorphic igneous and sedimentary rocks which have been formed during the long geologicalhistory
Methodology
For making maps of Bouguersquos anomalies the average density of rock mass of 260 tm was used The3
average density of points for the entire field is 1-point to 1 km Analysis of geomagnetic data is based2
on the examination of anomalies of vertical component of the Earth magnetic fields The averagedensity of points for the entire field is 1 point to 4 km 2
7302019 _Interpretation of Gravity and Geomagnetic Maps- B_PP_03
httpslidepdfcomreaderfullinterpretation-of-gravity-and-geomagnetic-maps-bpp03 24
In the paper the following applied mathematical transformations are presented bull filteringbull elimination of regional phonebull calculation the higher derivative andbull analytical extension of the field
Conclusions
According to interpretation of gravimetric and geomagnetic maps and maps made on the basis of applied mathematical transformations (figure 1 2 3 4) several anomaly zones were distinguishedResult of detailed analysis of geophysical maps is the existence of acid igneous rocks which arewidespread in this research area mostly underneath the sediments According to the analysis of geophysical maps it was determined that under sedimentary rocks are igneous rocks in the form of smaller bodies which are concentrated near the fault
Based on the geophysical maps confirmed the consistent fault zones which are detected by geologicalresearch Predominant direction of faults is NNW- SSE and NN ndash SSW
References
Geophysical data base Fund of Department of Geophysics Faculty of Mining and Geology BelgradeUniversity BeogradIgnjatović S 2006 Geological-geophysical model of ultramaphic complex Mirdita zone ndash Đakovica ndash Orahovac BSc thesis Faculty of Mining and Geology Belgrade University BeogradMarijanović M 2005 Geophysical model of geological structure of Fruška Gora mt BSc thesis Faculty of Mining and Geology Belgrade University BeogradGeological map of SFRY L 34-141 Bor 1976 Beograd
Geological map of SFRY L 34-140 Žagubica 1970 BeogradStar čević M 1991 Gravity methods of exploration Nauka BeogradStar čević M Đor đević A 1998 Basics of Geophysics II ndash Gravity methods Geomagnetic mehtods BelgradeUniversity Beograd
7302019 _Interpretation of Gravity and Geomagnetic Maps- B_PP_03
httpslidepdfcomreaderfullinterpretation-of-gravity-and-geomagnetic-maps-bpp03 34
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Figure 1 Geomagnetic map of the study area with step 1 of field extension upward
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Figure 2 Geomagnetic map of the study area with step 1 of field extension downward
7302019 _Interpretation of Gravity and Geomagnetic Maps- B_PP_03
httpslidepdfcomreaderfullinterpretation-of-gravity-and-geomagnetic-maps-bpp03 44
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Figure 3 Bougue map of the study area with step 1 of field extension upward
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Figure 4 Bougue map of the study area with step 1 of field extension downward
7302019 _Interpretation of Gravity and Geomagnetic Maps- B_PP_03
httpslidepdfcomreaderfullinterpretation-of-gravity-and-geomagnetic-maps-bpp03 24
In the paper the following applied mathematical transformations are presented bull filteringbull elimination of regional phonebull calculation the higher derivative andbull analytical extension of the field
Conclusions
According to interpretation of gravimetric and geomagnetic maps and maps made on the basis of applied mathematical transformations (figure 1 2 3 4) several anomaly zones were distinguishedResult of detailed analysis of geophysical maps is the existence of acid igneous rocks which arewidespread in this research area mostly underneath the sediments According to the analysis of geophysical maps it was determined that under sedimentary rocks are igneous rocks in the form of smaller bodies which are concentrated near the fault
Based on the geophysical maps confirmed the consistent fault zones which are detected by geologicalresearch Predominant direction of faults is NNW- SSE and NN ndash SSW
References
Geophysical data base Fund of Department of Geophysics Faculty of Mining and Geology BelgradeUniversity BeogradIgnjatović S 2006 Geological-geophysical model of ultramaphic complex Mirdita zone ndash Đakovica ndash Orahovac BSc thesis Faculty of Mining and Geology Belgrade University BeogradMarijanović M 2005 Geophysical model of geological structure of Fruška Gora mt BSc thesis Faculty of Mining and Geology Belgrade University BeogradGeological map of SFRY L 34-141 Bor 1976 Beograd
Geological map of SFRY L 34-140 Žagubica 1970 BeogradStar čević M 1991 Gravity methods of exploration Nauka BeogradStar čević M Đor đević A 1998 Basics of Geophysics II ndash Gravity methods Geomagnetic mehtods BelgradeUniversity Beograd
7302019 _Interpretation of Gravity and Geomagnetic Maps- B_PP_03
httpslidepdfcomreaderfullinterpretation-of-gravity-and-geomagnetic-maps-bpp03 34
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Figure 1 Geomagnetic map of the study area with step 1 of field extension upward
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Figure 2 Geomagnetic map of the study area with step 1 of field extension downward
7302019 _Interpretation of Gravity and Geomagnetic Maps- B_PP_03
httpslidepdfcomreaderfullinterpretation-of-gravity-and-geomagnetic-maps-bpp03 44
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Figure 3 Bougue map of the study area with step 1 of field extension upward
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Figure 4 Bougue map of the study area with step 1 of field extension downward
7302019 _Interpretation of Gravity and Geomagnetic Maps- B_PP_03
httpslidepdfcomreaderfullinterpretation-of-gravity-and-geomagnetic-maps-bpp03 34
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Figure 1 Geomagnetic map of the study area with step 1 of field extension upward
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Figure 2 Geomagnetic map of the study area with step 1 of field extension downward
7302019 _Interpretation of Gravity and Geomagnetic Maps- B_PP_03
httpslidepdfcomreaderfullinterpretation-of-gravity-and-geomagnetic-maps-bpp03 44
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Figure 4 Bougue map of the study area with step 1 of field extension downward
7302019 _Interpretation of Gravity and Geomagnetic Maps- B_PP_03
httpslidepdfcomreaderfullinterpretation-of-gravity-and-geomagnetic-maps-bpp03 44
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Figure 4 Bougue map of the study area with step 1 of field extension downward
