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Ucan Osman N. Albora A. Muhittin Hisarli Z. Mümtaz 《Marine Geophysical Researches》2001,22(4):251-264
In this paper, residual and regional gravity and magnetic anomalies of Saros Bay are separated using wavelet method. Wavelet
is one of the modern, stochastic image approaches processing technique in electronics. The vertical, horizontal and diagonal
components of wavelet output are evaluated simultaneously and an underground model is obtained by suitable cross-sections.
Thus the geological and tectonic properties of Saros Bay are extracted. Our proposed model is confirmed by deep and shallow
seismic researches of Turkish Petroleum Cooperation (TPAO). The South-East region of Saros Graben is formed by strike slip
Ganos Fault and Anafartalar reverse Fault that lies on the east of Ganos Fault. On the Northwest region, there is strike slip
component fault resulting in the Enez Graben. Here we detected two new oval type geological structure, both of them starting
from the Eastern direction of Canakkale Dardanelles and but one of them continuing through Gelibolu Peninsuls, while the other
tending to the Enez Graben. We think that these structures are the ruins of a very old sea in this region.
This revised version was published online in November 2006 with corrections to the Cover Date. 相似文献
2.
Thermal structure of the crust in the Black Sea: comparative analysis of magnetic and heat flow data
V. I. Starostenko M. N. Dolmaz R. I. Kutas O. M. Rusakov E. Oksum Z. M. Hisarli M. Okyar U. Y. Kalyoncuoglu H. E. Tutunsatar O. V. Legostaeva 《Marine Geophysical Researches》2014,35(4):345-359
This paper presents the first study of mapping of the Curie point depth (CPD) from magnetic data for the Black Sea and a comparison with a classical thermal modeling from heat flow data. The provided relationship between radially averaged power spectrum of the magnetic anomalies and the depths to the magnetic sources of the Black Sea vary from 22 to 36 km. Deepening of CPDs observed in the western and eastern Black Sea basins correspond with the thickest sediment areas, whereas the shallow CPDs are related to the Mid-Black Sea Ridge and thin sediment areas at the costal side of the Black Sea. For comparison, the temperature field was also modeled from heat flow data from the Black Sea along three approximately north–south directed profiles corresponding to known DSS soundings. The Curie isotherm along the profiles occurs at depths of 22–35 km. A comparison of the results of the two independent methods reveals only 8–10 % discrepancy. This discrepancy is equal to an accuracy of temperature determination from heat flow data. 相似文献
3.
Mualla Cengiz Cinku Dieter Rammlmair Mümtaz Z. Hisarli Naci Orbay 《Studia Geophysica et Geodaetica》2009,53(4):475-494
Upper Cretaceous volcanic rocks were collected at 24 sites along the Pontides, N-NE Turkey, for rock magnetic and geochemical
studies. Rock magnetic and petrographic methods showed that the lavas are characterized predominantly by titanomagnetites
with a mixture of pseudo-single and multi-domain grains, whereas in tephrite single domain titanohematite was dominant. Measurements
of magnetic susceptibility and the geochemical properties on different volcanic rock types provide important knowledge about
the magnetic stability of the rocks. The magnetic properties are interpreted in terms of the composition, concentration, magma
generation. Tephrite and phonotephrites with the highest intensities (5200 mA/m) and high magnetic susceptibility values (2585
× 10−5), largest grain sizes and Fe/Ti values, showing minor or no alteration are the most magnetic stable samples in contrast to
dacites with the lowest intensity-magnetic susceptibility (520 mA/m − 573 × 10−5) and high alteration degree. The basanite samples show very low NRM (48–165 mA/m) but very high magnetic susceptibility (2906–3100
× 10−5) values suggesting the alteration of Fe-Ti minerals. It is shown that the magnetic properties of the basic to acidic rocks
show a systematic variation with magma differentiation and could be related to fractional crystallization. Major and trace
elements revealed that the lavas are compatible with complex magma evolution, with mineral phases of olivine+magnetite+clinopyroxene
in basic series, amphibole+ +clinopyroxene in intermediate rocks and plagioclase+clinopyroxene+biotite in acidic series. 相似文献
4.
Investigation into regional thermal structure of the Thrace Region, NW Turkey, from aeromagnetic and borehole data 总被引:1,自引:0,他引:1
Z. Mümtaz Hisarli M. Nuri Dolmaz Mahmut Okyar Ali Etiz Naci Orbay 《Studia Geophysica et Geodaetica》2012,56(1):269-291
The aeromagnetic values over the study region are relatively uniform except for a few anomalies in the northeastern and southwestern
areas. Analyses of aeromagnetic data were performed in NW Turkey, in order to have a look into the subsurface regional thermal
structure of the region. For this purpose, power spectra, reduced to pole (RTP), and band-pass filtered anomalies were produced
using geophysical techniques. Band-pass filtered data were produced from the RTP aeromagnetic anomalies to isolate near surface
and undesired deep effects. Based on the aeromagnetic data interpretation, the thickness of the magnetized crust, named the
Curie Point Depth (CPD), in the study area lies between 9.7 and 20.3 km. The CPD estimates in the Thrace region of Turkey
indicate two shallow CPD (SCPD1 and SCPD2) zones (the Istranca Massif and the Saros Graben area). The deep CPD are located
within the Thrace Basin with sediment thickness of about 9 km. The corresponding heat flow map prepared from the averaged
thermal conductivities and thermal gradients from the CPD reveals the existence of one low heat flow zone (75 mW/m2) over the center of Thrace Basin, and two high heat flow zones over the Istranca Masif (100–125 mW/m2) in the northern side and Saros Graben (125–135 mW/m2) areas in the southern side of the Thrace Basin. 相似文献
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Application of Wavelet Transform to Magnetic Data Due to Ruins of the Hittite,Civilization in Turkey
A.?Muhittin AlboraEmail author Z.?Mümtaz Hisarli Osman N.?Ucan 《Pure and Applied Geophysics》2004,161(4):907-930
— In the recent years, geophysical methods have been applied successfully in archaeological studies. In this article we have studied the application of wavelet transform to magnetic data in order to estimate boundaries of various synthetic examples and real data. Enhanced Horizontal Derivative (EHD) method is also applied as an alternative method for boundary estimation. The performance of wavelet transform and the EHD method are evaluated using magnetic data of the Sarissa-Kusakli archaeological site. All boundary results are mutually compared. Based on these comparisons, we conclude that the wavelet transform provides reasonable results.This work was supported by the TUBITAK under Project YDABCAG-100Y021.Received: 23 October 2001 相似文献
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