Interpretation of aeromagnetic data of the Sivas Basin in the central eastern Turkey

The Sivas Basin is located in the eastern part of the central Anatolia. In this study, aeromagnetic data in the basin and surrounding area are processed and anomalies are interpreted to determine the approximate locations of the causative bodies and reveal their relationship with the tectonic trends. The sedimentary basin is surrounded by strong magnetic anomalies from the south, east, and northeast. The most apparent anomalies are observed in the E-NE of Zara, SW of Divrigi, and north of Kangal. These anomalies do not present significant directional change when they are reduced to the pole process. Causative bodies of the southern anomalies around Divrigi and Kangal extend from NE to SW and the northerly anomaly trend (to the north of Kangal) crosses the southern one (Divrigi trend) in the analytic signal map. These trends are well-defined by the maxima points of the horizontal derivatives and these maxspots generally follow the boundaries of anomalies in the tilt angle snap. The Kangal Fault controls the extensions of the Divrigi anomalies through the north and they are not observed in the area to the north of the fault. The Hafik Anomaly in the north of the study area is also differentiated from the anomaly group in the E-NE of Zara precisely, defining that they are created by 2 different causative bodies. Aeromagnetic characteristics of the ophiolites to the south indicate that they have different origin from the northern ophiolites group. Similarly, it is determined that the plutonic rocks in the south and north are also different origin emplacements, considering their aeromagnetic responses, mineral contents, and ore deposit possibilities.

Keywords:

Magnetic anomaly, Sivas Basin, central Anatolia analytic signal, tilt angle,

PDF

___

Alparslan M, 1995, 2 INT TURK GEOL WORK, P12
Aydin I, 2005, GEOPHYS J INT, V162, P633, DOI 10.1111/j.1365-246X.2005.02617.x
Bayhan H., 1987, JEOLOJI MUHENDISLIGI, V30, P11
Bektas O, 2007, PURE APPL GEOPHYS, V164, P975, DOI 10.1007/s00024-007-0196-5
BHATTACHARYYA BK, 1975, J GEOPHYS RES, V80, P4461, DOI 10.1029/JB080i032p04461
Blakely RJ., 1996, POTENTIAL THEORY GRA .
Bozkurt E, 2005, GEODIN ACTA, V18, P153, DOI 10.3166/ga.18.153-165
Boztug D., 1994, TURKIYE JEOLOJI B, V37, P1
Boztug D, 1997, P TUB BAYG NATO D PR, P105
Buyuksarac A, 2007, PHYS EARTH PLANET IN, V160, P86, DOI 10.1016/j.pepi.2006.10.003
CATER JML, 1991, TECTONOPHYSICS, V195, P29, DOI 10.1016/0040-1951(91)90142-F
Darin MH, 2019, TURK J EARTH SCI, V28, P834, DOI 10.3906/yer-1907-29
Dewey JF, 1986, GEOL SOC LOND SPEC P, P3, DOI DOI 10.1144/GSL.SP.1986.019.01.01
Erik NY, 2015, J PETROL SCI ENG, V127, P148, DOI 10.1016/j.petrol.2015.01.035
Erkan Y, 1981, ORTA ANADOLU MASIFIN, P9 .
Gansser A, 1974, SPECIAL PUBLICATIONS, V4, P267
Geven A, 1993, 25 ANN S HAC U EARTH, P43
Gorur N, 1998, INT GEOL REV, V40, P831, DOI 10.1080/00206819809465241
Guezou J.-C., 1996, INT GEOL REV, V38, P901, DOI [10.1080/00206819709465371, DOI 10.1080/00206819709465371]
Kangal O, 2017, TURK J EARTH SCI, V26, P127, DOI 10.3906/yer-1606-7
Legeay E, 2019, TECTONICS, V38, P2114, DOI 10.1029/2018TC005114
MILLER HG, 1994, J APPL GEOPHYS, V32, P213, DOI 10.1016/0926-9851(94)90022-1
NABIGHIAN MN, 1972, GEOPHYSICS, V37, P507, DOI 10.1190/1.1440276
OKUBO Y, 1985, GEOPHYSICS, V50, P481, DOI 10.1190/1.1441926
Onal KM, 2008, TECTONOPHYSICS, V460, P186, DOI 10.1016/j.tecto.2008.08.006
Pamukcu O, 2014, ENERG SOURCE PART A, V36, P2699, DOI 10.1080/15567036.2011.574194
Pichat A, 2019, MAR PETROL GEOL, V110, P587, DOI 10.1016/j.marpetgeo.2019.07.050
Piper JDA, 2006, GEOL SOC AM SPEC PAP, V409, P417, DOI 10.1130/2006.2409(20)
Poisson A., 1996, INT GEOL REV, V38, P838, DOI [10.1080/00206819709465366, DOI 10.1080/00206819709465366]
Ravat D, 2007, GEOPHYS J INT, V169, P421, DOI 10.1111/j.1365-246X.2007.03305.x
ROEST WR, 1992, GEOPHYSICS, V57, P116, DOI 10.1190/1.1443174
Salem A, 2008, GEOPHYSICS, V73, pL1, DOI 10.1190/1.2799992
Sengor AMC, 1979, MIDMESOZOIC CLOSURE, V279, P590
SPECTOR A, 1970, GEOPHYSICS, V35, P293, DOI 10.1190/1.1440092
Tanaka A, 1999, TECTONOPHYSICS, V306, P461, DOI 10.1016/S0040-1951(99)00072-4
Tatar O, 1992, 1 INT S E MED GEOL A, P91
TEMIZ H, 1993, GEOL J, V28, P239, DOI 10.1002/gj.3350280304
Temiz H, 1991, TERR ABSTR, V3, P269 .
Verduzco B., 2004, LEADING EDGE, V23, P116, DOI [10.1190/1.1651454, DOI 10.1190/1.1651454]
Yilmaz A., 1985, TURKIYE JEOLOJI KURU, V28, P79
Yilmaz A, 1994, INT VOLC C, P39 .
Yilmaz A, 2006, J ASIAN EARTH SCI, V27, P164, DOI 10.1016/j.jseaes.2005.02.006
YILMAZ S, 1993, GEOL J, V28, P383, DOI 10.1002/gj.3350280316