Two-stage bimodal volcanism in a Late Cretaceous arc/back-arc setting, NE Turkey: Constraints from volcano-stratigraphy, zircon U-Pb and 40Ar/39Ar geochronology and whole-rock elemental and Sr-Nd-Pb isotope geochemistry

被引:12
作者
Oguz-Saka, Simge [1 ,2 ]
Aydin, Faruk [1 ]
Karsli, Orhan [1 ]
Dokuz, Abdurrahman [3 ]
Aiglsperger, Thomas [4 ]
Miggins, Daniel P. [5 ]
Sen, Cuneyt [1 ]
Kandemir, Raif [6 ]
Sari, Bilal [7 ]
Koppers, Anthony A. P. [5 ]
机构
[1] Karadeniz Tech Univ, Dept Geol Engn, Trabzon, Turkiye
[2] Gen Directorate Mineral Res & Explorat, Ankara, Turkiye
[3] Gumushane Univ, Dept Geol Engn, Gumushane, Turkiye
[4] Lulea Univ Technol, Dept Civil Engn & Nat Resources, Div Geosci & Environm Engn, Lulea, Sweden
[5] Oregon State Univ, Coll Earth Ocean & Atmospher Sci, Argon Geochronol Lab, Corvallis, OR USA
[6] Recep Tayyip Erdogan Univ, Dept Geol Engn, Rize, Turkiye
[7] Dokuz Eylul Univ, Dept Geol Engn, Izmir, Turkiye
关键词
NE Turkey; Sakarya zone; Eastern Pontide magmatic arc; Back-arc; Late Cretaceous; Bimodal volcanism; Mantle-crust interaction; I-TYPE GRANITOIDS; EASTERN PONTIDES; SAKARYA ZONE; BLACK-SEA; RELATIVE CONTRIBUTIONS; GEODYNAMIC EVOLUTION; WESTERN ANATOLIA; CONTINENTAL RIFT; OKINAWA TROUGH; GUMUSHANE AREA;
D O I
10.1016/j.lithos.2023.107018
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
The eastern Blacksea magmatic arc (EBMA) in the eastern Sakarya Zone (ESZ) provides an excellent opportunity to investigate birth of an extensional intra-arc and back-arc settings in the Late Cretaceous over the Early Cretaceous northern passive margin of the Neotethys Ocean. Volcano-stratigraphy clearly shows that the Late Cretaceous volcanic activity of the EBMA occurred in two major phases. Bimodality, characterized by mafic/ basaltic rocks at the base and felsic/silicic types on top of it, is a typical feature of the lower (LVS) and upper (UVS) volcanic successions in the Giresun region of the ESZ. U-Pb and Ar-Ar ages support the volcanic suc-cession as two-stage (LVS: ca. 92-85 and UVS: ca. 83-67 Ma) bimodal volcanism. Both the volcanic successions are represented by similar rock types consisting of tholeiitic to calc-alkaline basalt-basaltic andesites and calc-alkaline to shoshonitic dacite-rhyolites. Basaltic (M1-and M2-series) and felsic/silicic (F1-and F2-series) sam-ples of the LVS and UVS have an arc-like signature with enriched large ion lithophile elements (LILEs) and light rare earth elements (LREEs) and depleted high field strength elements (HFSEs). Also, the felsic/silicic samples of the F1-and F2-series show prominent negative Sr and Eu anomalies (Eu/Eu* = 0.4 to 0.9), suggesting that plagioclase fractionation played a key role on the evolution of both felsic series. Bimodal rock series in two phases have a wide range of 87Sr/86Sr(i) (0.7048-0.7075) and 143Nd/144Nd(i) (0.5123-0.5127) ratios with var-iable epsilon Nd(i) values of-3.8 to +3.0. 206Pb/204Pb(i), 207Pb/204Pb(i) and 208Pb/204Pb(i) isotope ratios of the Giresun volcanic rocks vary in the range of 17.97-18.52, 15.55-15.65 and 37.53-38.56, respectively. Geochemical and isotopic data suggest that the parental magma of the M1-basaltic rocks were probably derived from a shallow (spinel-bearing) mantle metasomatized by slab/sediment-derived fluids. In contrast, the M2-basalts seem to have been originated from a deeper mantle source (spinel-garnet transition zone) enriched by slab/sediment-derived fluids and hydrous melts (bulk sediment) metasomatism with some contributions of lower/upper crustal materials. The least evolved basaltic samples in two phases are consistent with moderate (-10-15%) to high degree (-20-30%) partial melting of the metasomatized mantle. The silicic melts of the F1 -and F2-rocks series, on the other hand, were likely derived from melting of lower crustal materials consisting of meta-basalts/andesites and lesser amount of meta-sediments. Subsequently, these melts experienced FC +/- AFC and mixing processes during their ascent and emplacement to generate high-silica (rhyolitic) melts. Our data, combined with previous studies, suggest that two-stage bimodal volcanic rocks of the Late Cretaceous in the ESZ were formed in the transition from an extensional continental intra-arc to a back-arc setting during the north-ward subduction of the northern branch of Neotethys Ocean.
引用
收藏
页数:26
相关论文
共 85 条
[1]   Petrogenetic evolution of late Cenozoic, post-collision volcanism in western Anatolia, Turkey [J].
Aldanmaz, E ;
Pearce, JA ;
Thirlwall, MF ;
Mitchell, JG .
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, 2000, 102 (1-2) :67-95
[2]  
Almashramah Y., 2020, THESIS KARADENIZ TU
[3]   Geochemical and Sr-Nd-Pb isotopic characteristics of Paleocene plagioleucitites from the Eastern Pontides (NE Turkey) [J].
Altherr, Rainer ;
Topuz, Gueltekin ;
Siebel, Wolfgang ;
Sen, Cueneyt ;
Meyer, Hans-Peter ;
Satir, Muharrem ;
Lahaye, Yann .
LITHOS, 2008, 105 (1-2) :149-161
[4]  
Aydin F., 2016, 112Y365 TUBITAK PROJ
[5]   Petrogenesis of the Neogene alkaline volcanics with implications for post-collisional lithospheric thinning of the Eastern Pontides, NE Turkey [J].
Aydin, Faruk ;
Karsli, Orhan ;
Chen, Bin .
LITHOS, 2008, 104 (1-4) :249-266
[6]   Temporal, geochemical and geodynamic evolution of the Late Cretaceous subduction zone volcanism in the eastern Sakarya Zone, NE Turkey: Implications for mantle-crust interaction in an arc setting [J].
Aydin, Faruk ;
Saka, Simge Oguz ;
Sen, Cuneyt ;
Dokuz, Abdurrahman ;
Aiglsperger, Thomas ;
Uysal, Ibrahim ;
Kandemir, Raif ;
Karsli, Orhan ;
San, Bilal ;
Baser, Rasim .
JOURNAL OF ASIAN EARTH SCIENCES, 2020, 192
[7]   Quaternary bimodal volcanism in the Nigde Volcanic Complex (Cappadocia, central Anatolia, Turkey): age, petrogenesis and geodynamic implications [J].
Aydin, Faruk ;
Schmitt, Axel K. ;
Siebel, Wolfgang ;
Sonmez, Mustafa ;
Ersoy, Yalcin ;
Lermi, Abdurrahman ;
Dirik, Kadir ;
Duncan, Robert .
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY, 2014, 168 (05) :1-24
[8]   Geochronology, geochemistry, and petrogenesis of the Macka subvolcanic intrusions: implications for the Late Cretaceous magmatic and geodynamic evolution of the eastern part of the Sakarya Zone, northeastern Turkey [J].
Aydin, Faruk .
INTERNATIONAL GEOLOGY REVIEW, 2014, 56 (10) :1246-1275
[9]   K-Ar ages of granitoids unravel the stages of Neo-Tethyan convergence in the eastern Pontides and central Anatolia, Turkey [J].
Boztug, Durmus ;
Harlavan, Yehudit .
INTERNATIONAL JOURNAL OF EARTH SCIENCES, 2008, 97 (03) :585-599
[10]   Large-scale silicate liquid immiscibility during differentiation of tholeiitic basalt to granite and the origin of the Daly gap [J].
Charlier, Bernard ;
Namur, Olivier ;
Toplis, Michael J. ;
Schiano, Pierre ;
Cluzel, Nicolas ;
Higgins, Michael D. ;
Vander Auwera, Jacqueline .
GEOLOGY, 2011, 39 (10) :907-910