You are here

ANKARA GB’SINDA YER ALAN OYACA-KEDİKAYASI-BOYALIK (ORTA ANADOLU, TÜRKİYE) ADAKİTLERİNİN PETROJENETİK ÖZELLİKLERİ: YİTİM DİLİMİ KÖKENLİ ERGİYİK METASOMATİZMASINA KANITLAR

Journal Name:

Publication Year:

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
The Early Miocene Oyaca, Kedikayası and Boyalık dacites, situated approximately 50-60 km southwest of Ankara have affinities similar to adakitic rocks. They have porphyritic texture with a variable amount of plagioclase feldspar, hornblende and lesser biotite phenocrysts and a groundmass of plagioclase and quartz microcrysts. They have high Sr/Y (55-79 ppm) and (La/Yb)n (21-32 ppm) ratios, and low Y (10-19 ppm) and heavy rare earth element contents. According to their SiO2 (62.3-69.70 % wt.) and MgO (0.62-2.23 % wt) contents, they are referred to as high silica adakites, indicating the effects of slabderived melts in their genesis. The adakites in the study area are enriched in Large Ion Lithophile Elements (LILE) (e.g., Ba: 800-1395 ppm, Sr≥720 ppm) relative to High Field Strength Elements (HFSE) (e.g. Nb: 20-10 ppm, Ta: 0.8-1.2 ppm). Low Rb/Sr and high Ba/ Sr ratios in these adakites indicate that they are resulted from an amphibole bearing mantle source, as amphiboles have low Rb concentrations. Thus, partial melting of an amphibole bearing mantle source would be responsible for low Rb concentrations). For that reason, non-modal partial melting calculations from a 13 % amphibole bearing garnet peridotite were carried out in order to determine the source features of adakites. The variations between La/Yb vs La and (Tb/Yb)n vs (La/Yb)n in partial melting studies demonstrate that the adakites in the study area were most probably derived from an amphibole bearing garnet peridotite mantle source via 5-10 % degrees of partial melting.
Abstract (Original Language): 
Ankara’nın yaklaşık 50-60 km güneybatısında yer alan erken Miyosen yaşlı Oyaca, Kedikayası ve Boyalık dasitleri adakit ve/veya adakitik kayaçlara benzer özelliklere sahiptir. Porfirik dokulu kayaçlar plajiyoklaz, hornblend ve az miktarda biyotit fenokristalleri ile hamurda plajiyoklaz ile kuvars mikrokristallerinden oluşmaktadır. Kayaçlar, yüksek Sr/Y (55-79 ppm) ve (La/Yb)n (21-32 ppm), düşük Y (10-19 ppm) ve ağır nadir toprak element içeriklerine sahiptir. SiO2 (62.3-69.70 % ağ.) ve MgO (0.62-2.23 % ağ.) içeriklerine göre, yüksek silika adakitleri olarak tanımlanmış olup, bu durum kayaçların oluşumunda yitim dilimi (slab) kökenli ergiyiklerin etkili olduğuna işaret etmektedir. Çalışma alanındaki adakitler yüksek çekim alanlı elementlere (HFSE) göre (Nb: 20-10 ppm, Ta: 0.8-1.2 ppm) büyük iyon yarıçaplı elementler (LILE) (Ba: 800-1395 ppm, Sr≥720 ppm) açısından zenginleşmiştir. Düşük Rb/Sr ve yüksek Ba/Sr oranları amfibol içeren bir manto kaynağından türediğini göstermektedir. Çünkü, amfiboller düşük Rb içeriğine sahiptir. Buna göre, amfibol içeren bir manto kaynağının ergimesi düşük Rb içeriğine neden olmaktadır. Bu nedenle, adakitlerin kaynak özelliklerinin belirlenmesi için % 13 amfibol içeren granatperidotit kayacından itibaren non-modal yığın ergime modellemesi gerçekleştirilmiştir. Kısmi ergime çalışmalarında, La/Yb-La ve (Tb/Yb)n-(La/Yb)n diyagramlarındaki değişimler, adakitlerin muhtemelen amfibol içeren granat peridotit manto kaynağından % 5-10 kısmi ergimeler sonucu oluştuğunu göstermektedir.
81-92

REFERENCES

References: 

Alıcı Şen, P. 2009. Trace element modelling of the origin
and evolution of the Oyaca-Boyalik volcanic rocks
(NE of Haymana, Ankara, Turkey). International
Geology Review, 51 (2),116-132.
Barry, T.L., Saunders, A.D., Kempton, P.D., Windley, B.F.,
Pringle, M.S. Dorjnamjaa, D., Saandar, S. 2003.
Petrogenesis of Cenozoic basalts from Mongolia:
evidence for the role of asthenospheric versus
metasomatized lithospheric mantle sources.
Journal of Petrology 44, 5–91.
Beate, B., Monzier, M., Spikings, R., Cotton, J., Silva,
J., Bourdon, E., Eissen, J.P. 2001. Mio- Pliocene
adakite generation related to flat subduction in
southern Ecuador: the Quimsacocha volcanic
center. Earth and Planetary Science Letters 192,
561-570.
Bourdon, E., Eissen, J.P., Monzier, M., Robin C., Martin H.,
Cotton J., Hall M.L. 2002. Adakite-like lavas from
Antisana volcano (Ecuador): evidence for slab
melt metasomatism beneath the Andean Northern
Volcanic Zone. Journal of Petrology, 43, 199-217.
Bozkurt, E., Koçyiğit, A., Winchester J.A., Holland, G.,
Beyhan, A. 1999. Petrochemistry of the Oyaca-
Kedikayası (Ankara) dacites as evidence for the
post-collisional tectonic evolution of North-central
anatolia. Geological Journal 34, 223-234.
Calmus, T., Aguillon-Robles, A., Maury, R.C., Bellon, H.,
Benoit, M., Cotten, J., Bourgois, J., Michaud, F.
2003. Spatial and temporal evolution of basalts
and magnesian andesites (bbajaitesQ) from Baja
California, Mexico: the role of slab melts. Lithos
66 (1–2), 77– 105.
Castillo, P.R., Janney, P.E., Solidum, R.U. 1999. Petrology
and geochemistry of Camiguin island, southern
Philippines: insights to the source of adakites and
other lavas in a complex arc setting. Contributions
to Mineralogy and Petrology 134, 33-51.
Castillo, P.R. 2006. An overview of adakite petrogenesis.
Chinese Science Bulletin 51, 257-268.
Chung, S.L., Liu, D., Ji, J., Chu, M.F., Lee, H.Y., Wen, D.J.,
Lo, C.H., Lee, T.Y., Qian, Q., Zhang, Q. 2003.
Adakites from continental collision zones: melting
of thickened lower crust beneath southern Tibet.
Geology 31, 1021-1024.
Defant, M.J., Drummond, M.S. 1990. Derivation of some
modern arc magmas by melting of young subducted
lithosphere. Nature 347, 662-665.
Defant, M.J., Jackson, T.E., Drummond, M.S., De Boer,
J.Z., Bellon, H., Feigenson, M.D., Maury, R.C.,
Stewart, R.H. 1992. The geochemistry of young
volcanism throughout western Panama and
southeastern Costa Rica: an overview. Journal of
Geological Society (London) 149, 569– 579.
Defant, M.J., Xu, J.F., Kepezhinskas, P., Wang, Q., Zhang,
Q., Xiao, L. 2002. Adakites: some variations on a
theme. Acta Petrologica Sinica 18, 129–142.
Edwards, C., Menzies, M., Thirwall, M. 1991. Evidence
from Muriah, Indonesia, for the interplay of suprasubduction
zone and intraplate processes in the
genesis of potassic alkaline magmas. Journal of
Petrology 32, 555-592.
Eyüboğlu, Y., Santosh, M., Chung, S.L. 2011a. Crystal
fractionation of adakitic magmas in the crustmantle
transition zone: Petrology, geochemistry
and U-Pb zircon chronology of the Seme adakites,
Eastern Pontides, NE Turkey. Lithos, 121, 151-166.
Eyüboğlu, Y., Chung, S.L., Santosh, M., Dudas, F.O.,
Akaryali, E. 2011b. Transition from shoshonitic
to adakitic magmatism in the Eastern Pontides,
NE Turkey: Implications for slab window melting.
Gondwana Research, 19, 413-429.
Eyüboğlu, Y., Santosh, M., Chung, S.L. 2011c.
Petrochemistry and U-Pb zircon ages of adakitic
intrusions from the Pulur Massif (Eastern Pontides,
NE Turkey): implications for slab roll-back
and ridge subduction associated with Cenozoic
convergent tectonics in Eastern Mediterranean.
Journal of Geology, v. 119, p. 394-417.
Eyüboğlu, Y., Santosh, .M., Dudas, F.O., Akaryalı, E.,
Chung, S.L., Akdağ, K., Bektaş, O. 2012a. The
nature of transition from adakitic to non-adakitic
magmatism in a slab-window setting: A synthesis
from the Eastern Pontides, NE Turkey. Geoscience
Frontiers, doi: 10.1016/jgsf.2012.10.001.
Eyüboğlu, Y, Santosh, M., Yi, K., Bektaş, O., Kwon, S.
2012b. Discovery of Miocene adakitic dacite from
the Eastern Pontides Belt and revised geodynamic
model for the late Cenozoic Evolution of eastern
Mediterranean region. Lithos, 146-147, 218-232.
Fitton, J. G., James, D., Leeman, W. P. 1991. Basic magmatism
associated with Late Cenozoic extension in the
Western United States: compositional variations in
space and time. Journal of Geophysical Research,
96, No: B8, 13693-13711.
Foley, S.F., Barth, M.G., Jenner, G.A. 2000. Rutile/melt
partition coefficients for trace elements and
an assessment of the influence of rutile on the
trace element characteristics of subduction zone
magmas. Geochimica et Cosmochimica Acta 64,
933–938.
Furman, T., Graham D. 1999. Erosion of lithospheric mantle
beneath the East African Rift system: evidence
from the Kivu volcanic province. Lithos 48, 237-
262.
Gill, J.B. 1981. Orogenic andesites and Plate tectonics.
Springer - Verlag, New York.
89
Ankara (GB) Adakitlerinin Petrojenetik Özellikleri
Görür, N., Oktay, P.Y., Seymen, I., Şengör, A.M.C. 1984.
Palaeotectonic evolution of the Tuzgölü basin
complex, central Turkey: sedimentary record
of a Neotethyan closure. In: Dixon, J. E. and
Robertson, A. H. F. (eds) The Geological Evolution
of the Eastern Mediterranean. Geological Society
(London), Special Publications 17. 467-482.
Hou, Z.Q., Gao, Y.F., Qu, X.M., Rui, Z.Y., Mo, X.X. 2004.
Origin of adakitic intrusives generated during mid-
Miocene east-west extension in southern Tibet.
Earth and Planetary Science Letters 220, 139-155.
Ionov, D. A., Hofmann, A.W. 1995. Nb-Ta rich mantle
amphiboles and micas: implications for subductionrelated
metasomatic trace element fractionations.
Earth and Planetary Science Letter 131 (3-4), 341-
356.
Jiang, Y.-H., Liu, Z. Jia, R.-Y. Liao, S.-Y. Zhou, Q., Zhao, P.
2012. Miocene potassic granite–syenite association
in western Tibetan Plateau: Implications for
shoshonitic and high Ba–Sr granite genesis. Lithos
134-135, 146-162.
Jung, S., Hoernes, S. 2000. The major- and trace-element
and isotope (Sr, Nd, O) geochemistry of Cenozoic
alkaline rift-type volcanic rocks from the Rhön
area (central Germany): petrology, mantle source
characteristics and implications for asthenospherelithosphere
interactions. Journal of Volcanology
and Geothermal Research 99, 27-53.
Karslı, O., Dokuz, A., Uysal, İ., Aydın, F., Kandemir,
R., Wijbrans, J. 2010. Generation of the Early
Cenozoic adakitic volcanism by partial melting of
mafic lower crust, Eastern Turkey: Implications
for crustal thickening to delamination. Lithos 114,
109-120.
Kaymakçı, N. 2000. Tectonostratigraphical evolution of
the Çankırı Basin (Central Anatolia, Turkey).
Geological Survey Division, ITC-Enschede,The
Netherland, PhD thesis, 245p.
Koçyiğit A. 1991. An example of an accretionary forearc
basin from northern central Anatolia and
its implications for the history of subduction
of Neotethys in Turkey. Geological Society of
America Bulletin 103, 22-36.
Koçyiğit A., Türkmenoğlu, A., Beyhan, A., Kaymakçı,
N., Akyol, E. 1995. Post collisional tectonics of
Eskişehir-Ankara-Çankırı segmants of the İzmir-
Ankara-Erzincan suture zone (IAESZ): Ankara
orogenic phase. Turkish Association of Petroleum
Geologists Bulletin 6, 69-86.
Koçyiğit A., Winchester, A.J., Bozkurt, E., Holland, G.
2003. Saraçköy volcanic suite: implications for the
subductional phase of arc evolution in the Galatean
Arc Complex, Ankara, Turkey. Geological Journal
38, 1–14.
Liu, S., Hu, R-Z., Feng, C-X., Zhou, H-B., Li, C., Chi, X-G.,
Peng, J-T., Zhong, H., Qi, L., Qi, Y-Q., Wang, T.
2008. Cenozoic high Sr/Y volcanic rocks in the
Qiangtang terrane, northern Tibet: geochemical
and isotopic evidence for the origin of delaminated
lower continental melts. Geological Magazine 145,
463-474.
Macpherson, C.G., Dreher S.T., Thirwall M.F. 2006.
Adakites without slab melting: high pressure
differentiation of island arc magma, Mindanao, the
Philippines. Earth and Planetary Science Letters
243, 581-593,.
Martin, H. 1999. The adakitic magmas: modern analogues
of Archaean granitoids. Lithos 46 (3), 411– 429.
Martin, H., Smithies, R.H., Rapp, R., Moyen, J.F.,
Champion, D. 2005. An overview of adakite,
tonalite-trondhjemite-granodiorite (TTG) and
sanukitoid: relationships and some impplications
for crustal evolution. Lithos 79, 1-24.
Maury, R.C., Sajona, F.G., Pubellier, M., Bellon, H., Defant,
M.J. 1996. Fusion de la croute oceanique dans les
zones de subduction/collision recentes: l’exemple
de Mindanao (Philippines). Bulletin de la Societe
Geologique de France 167 (5), 579– 595.
McKenzie, D.P., O’Nions, R.K. 1991. Partial melt
distributions from inversion of rare earth element
concentrations. Journal of Petrology 32, 1021-
1091.
Moufti, M.R., Moghazi, A.M., Ali, K.A. 2012.
Geochemistry and Sr–Nd–Pb isotopic composition
of the Harrat Al-Madinah Volcanic Field, Saudi
Arabia, Gondwana Research 21, 670-689.
Moyen, J., F. 2009. High Sr/Y ve La/Yb ratios: The meaning
of the “adakitic signature”. Lithos 112, 556–574.
Nakamura, N. 1974. Determination of REE, Ba, Fe, Mg,
Na and K in carbonaceous and ordinary chondrites.
Geochimica et Cosmochimica Acta 38, 757-75.
Okay, A.İ., Tüysüz, O. 1999. Tethyan sutures of northern
Turkey. In: Durand, B., Jolivet, L., Horvath, F.,
Seranne, M. (Eds.), The Mediterranean Basin:
Tertiary Extansion within the Alpine Orogen, 156.
Geological Society, Special Publications, London,
pp. 75– 515.
Pearce, J.A. 1983. The role of subcontinental lithosphere
in magma genesis destructive plate margins.
In: continental basalt and Mantle xenolits, C. J.
Hawkesworth and M.J. Nory (eds) 230-249.
Rampone, E., Morten, L. 2001. Records of crustal
metasomatism in the garnet peridotites of the Ulten
zone (Upper Austroalpine, Eastern Alpes). Journal
of Petrology 42(1), 201-219.
Rapp, P.R., Shimizu, N., Norman, M.D., Applegate, G.S.
1999. Reaction between slab-derived melt and
peridotite in the mantle wedge: Experimental
90
MTA Dergisi (2013) 146 : 81-92
constrains at 3.8 GPa. Chemical Geology 160, 335-
356.
Richards, J.P., Kerrich, R. 2007. Special paper: adakite-like
rocks: their diverse origins and questionable role in
metallogenesis. Economic Geology 102, 537–576.
Ringwood, A.E. 1990. Slab-Mantle interactions:
Petrogenesis of intraplate magmas and structure of
the upper mantle. Chemical Geology, 82, 187-207.
Rogers, G., Saunders, A.D., Terrell, D.J., Verma, S.P.,
Marriner, G.F. 1985. Geochemistry of Holocene
volcanic rocks associated with ridge subduction in
Baja California, Mexico. Nature 315, 389– 392.
Rollinson, H.R., Tarney, J. 2005. Adakites-the key to
understanding LILE depletion in granulites. Lithos,
79, 61-81.
Rollinson, H.R. 1993. Using geochemical data: evaluation,
presentation, interpretation. Longman Scientific
and Technical, John Wiley and Sons, Inc., New
York, 352p.
Sajona, F.G., Maury, R., Bellon, H., Cotten, J., Defant, M.J.
1996. High field strength element enrichment of
Pliocene–Pleistocene island arc basalts, Zamboanga
Peninsula, western Mindanao (Philippines).
Journal of Petrology 37 (3), 693–726.
Sajona, F.G., Naury, R.C., Pubellier, M., Leterrier, J.,
Bellon, H., Cotton, J. 2000. Magmatic source
enrichment by slab-derived melts in a young postcollision
setting, central Mindanao (Philippines).
Lithos 54, 173–206
Saunders, A.D., Tarney, J., Weawer S.D. 1980. Transverse
geochemical variations across Antarctic Peninsula:
implications for the genesis of calc-alkaline
magmas. Earth and Planetary Science Letters 46,
344-360.
Shaw, D.M. 1970. Trace element fractionation during
anatexis. Geochimica et Cosmochimica Acta 34,
237-243.
Stern C.R., Kilian R. 1996. Role of the subducted slab,
mantle wedge and continental crust in the
generation of adakites from the Austral Volcanic
Zone. Contributions to Mineralogy and Petrology
123, 263-281,
Sun, S.S., McDonough, W.F. 1989. Chemical and isotopic
systematics of oceanic basalts: implications for
mantle composition and processes. In: Saunders,
A.D. and Norry, M.J. (eds.), Magmatism in ocean
basins. Geological Society (London), Special
Publication 42, 313-345.
Şahin, M. B. 2007. An important chabasite occurrence in
central Anatolia and its mineralogical features.
Bulletin of the Mineral Research and Exploration
135, 31-44.
Şengör, A.M.C., Yılmaz, Y. 1981. Tethyan evolution of
Turkey: a plate tectonic approach. Tectonophysics
75, 181-241.
Tankut, A., Wilson, M., Yihunie, T. 1998. Geochemistry and
tectonic setting of Tertiary volcanism in the Güvem
Area, Anatolia, Turkey. Journal of Volcanology
and Geothermal Research 85, 285-301.
Tatsumi, Y., Hamilton, D.L., Nesbitt, R.W. 1986. Chemical
characteristics of fluid phase from the subducted
lithosphere: evidence from high-presseure
experiments and natural rocks. Journal of
Volcanology and Geothermal Researches 29, 293-
309.
Tatsumi, Y., Nakamura, N. 1986. Composition of aquaeous
fluid from serpentinite in the subducted lithosphere.
Geochemical Journal 20, 191– 196.
Temel., A., Yürür, T., Alıcı, P., Varol, E., Gourgaud, A.,
Bellon, H., Demirbağ, H. 2010. Alkaline series
related to Early-Middle Miocene intra-continental
rifting in a collision zone: An example from Polatlı,
Central Anatolia, Turkey. Journal of Asian Earth
Science 38, 289-306.
Thompson, R.N. 1982. British Tertiary volcanic province.
Scottish Journal of Geology, 18, 49-107.
Toprak, V., Türkecan, A. 1998. Geology of the Galatean
Volcanic Province, Turkey. In: Third International
Turkish Geology Symposium, Excursion
Guidebook.
Tüysüz, O., Yiğitbaş, E. 1994. The Karakaya basin:
A Palaeotethyan marginal basin and its age of
opening. Acta Geologica Hungarica 75, 181-241.
Ünalan, G., Yüksel V. 1985. Haymana-Polatlı Havzasının
jeolojisi ve petrol olanakları. Maden Tetkik ve
Arama Genel Müdürlüğü Rapor No: 7665, 59 s.
Varol, E., Temel, A., Gourgaud, A., Bellon, H. 2006. Orta
Anadolu’da dalma-batma volkanizması için kanıt:
Balkuyumcu yöresi adakit benzeri volkanizma.
Evidence for slab-melt metasomatism in central
Anatolia, Turkey: Adakite like volcanism from
Balkuyumcu region). 59. Türkiye Jeoloji Kurultayı
Bildiri özleri,
Varol, E., Temel, A., Gourgaud, A., Bellon, H. 2007.
Early Miocene ‘adakite-like’ volcanism in the
Balkuyumcu region, central Anatolia, Turkey:
petrology and geochemistry. Journal of Asian
Earth Sciences 30, 613-628.
Varol, E., Temel, A., Gourgaud A. 2008. Textural and
compositional evidences for magma mixing in the
evolution of Çamlıdere volcanic rocks (Galatean
Volcanic Province), Central Anatolia, Turkey.
Turkish Journal of Earth Sciences 17, 709– 727.
Wang, K.-L., Chung, S.-L., O’Reilly, S. 2004. Geochemical
Constraints for the Genesis of Post-collisional
Magmatism and the Geodynamic Evolution of the
Northern Taiwan Region. Journal of Petrology
45(5), 975-1011.
91
Ankara (GB) Adakitlerinin Petrojenetik Özellikleri
Wang, K., McDermott, F., Xu, J.-F., Bellon, H., Zhu, Y.-
T. 2005. Cenozoic K-rich adakitic volcanic rocks
in the Hohxil area, northern Tibet: Lower-crustal
melting in an intracontinental setwting. Geology
33, 465-468.
Wang, K., Wyman, D.A., Xu, J., Jian, P., Zhao, Z., Li, C.,
Xu, W., Ma, J., He, B. 2007a. Early Cretaceous
adakitic granites in the Northern Dabie Complex,
central China: implications for partial melting and
delamination of thickened lower crust. Geochimica
et Cosmochimica Acta 71, 2609-2636.
Wang, K., Wyman, D.A., Xu, J., Zhao, Z., Jian, P., Zi, F.
2007b. Partial melting of thickened or delaminated
lower crust in the middle of Eastern China:
implication for Cu-Au mineralization. Journal of
Geology 115, 149-161.
Wilson, M., Tankut, A., Güleç, N. 1997. Tertiary volcanism
of the Galatia North west Central Anatolia, Turkey.
Lithos 42, 105–121
Zamora, D. 2000. Fusion de la croute oceanique subductee:
approche experimentale et geochimique. Universite
Thesis Universite Blaise Pascal, Clermont-Ferrand,
314 pp.
Zhu, D.-C., Zhao, Z.-D., Pan, G.-T., Lee, H.-Y., Kanf, Z.-Q.,
Liao, Z.-L., Wang, L.-Q., Li, G.-M., Dong, G.-C.,
Liu, B. 2009. Early Cretaceous subduction-related
adakite like rocks of the Gangdese Belt, southern
Tibet: Products of slab melting and subsequent
melt-peridotite interaction. Journal of Asian Earth
Science 34, 298-309.
Xu, J.F., Wang, Q., Yu, X.Y. 2000. Geochemistry of high-
Mg andesites and adakitic andesite from the
Sanchazi block of the Mian-Lue ophiolitic melange
in the Qinling Mountains, central China: Evidence
of partial melting of the subducted Paleo-Tethyan
crust. Geochemical Journal 34, 359-377.
Xu, J.F., Shinjio, R., Defant, M.,J., Wang, Q., Rapp, R.P.
2002. Origin of Mesozoic adakitic intrusive rocks
in the Ningzhen area of east China: partial melting
of delaminated lower continental crust. Geology
12, 1111-1114.
92

Thank you for copying data from http://www.arastirmax.com