Details
| Original language | English |
|---|---|
| Pages (from-to) | 81-103 |
| Number of pages | 23 |
| Journal | Ofioliti |
| Volume | 42 |
| Issue number | 2 |
| Publication status | Published - 2017 |
Abstract
The Kuluncak (Malatya) ophiolite in the Eastern Tauride, Turkey, consists of mantle tectonites, ultramafic-mafic cumulates, isotropic gabbros, a sheeted dike complex, plagiogranites, and a volcanic complex. The best exposure of the mafic cumulate rocks of the Kuluncak ophiolite is in the Hekimhan region, where they are represented by olivine gabbro and gabbro showing orthocumulate to mesocumulate textures. The cumulus and postcumulus minerals do not show significant zoning. The crystallization order of the cumulates is olivine, plagioclase, clinopyroxene and orthopyroxene. Whole-rock major- and trace-element geochemistry of the mafic cumulate rocks indicates that the primary magma generating the Kuluncak ophiolite is similar in composition to those observed in modern island-arc tectonic settings. Rare earth element (REE) concentrations of the mafic cumulates exhibit depleted light rare earth element (LREE) patterns, with CeN/SmN and CeN/YbN ratios ranging from 0.21 to 0.75 and from 0.17 to 0.66, respectively. The coexistence of anorthite-rich plagioclase (An73.4-93.7), highly magnesian olivine (Fo65.2-86.9), clinopyroxene (Mg#75-92.1), and orthopyroxene (Mg#77.6-84.3) in the cumulate gabbroic rocks is indicative of an intraoceanic subduction setting and suggests that the Kuluncak ophiolite was formed during the Late Cretaceous closure of the Inner Tauride Ocean.
Keywords
- Cumulate, Inner Tauride. Turkey, Mineral chemistry, Ophiolite, Suprasubduction zone
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geology
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In: Ofioliti, Vol. 42, No. 2, 2017, p. 81-103.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Tectonic significance of the cumulate gabbros within Kuluncak Ophiolitic suite (Malatya, SE Turkey) inferred from geochemical data
AU - Camuzcuoğlu, Murat
AU - Bağcı, Utku
AU - Koepke, Jürgen
AU - Wolff, Paul Eric
N1 - Funding information: This study was supported by the Research Fund of Mersin University in Turkey with Project Number BAP-FBE JM (MC) 2011-2 YL.
PY - 2017
Y1 - 2017
N2 - The Kuluncak (Malatya) ophiolite in the Eastern Tauride, Turkey, consists of mantle tectonites, ultramafic-mafic cumulates, isotropic gabbros, a sheeted dike complex, plagiogranites, and a volcanic complex. The best exposure of the mafic cumulate rocks of the Kuluncak ophiolite is in the Hekimhan region, where they are represented by olivine gabbro and gabbro showing orthocumulate to mesocumulate textures. The cumulus and postcumulus minerals do not show significant zoning. The crystallization order of the cumulates is olivine, plagioclase, clinopyroxene and orthopyroxene. Whole-rock major- and trace-element geochemistry of the mafic cumulate rocks indicates that the primary magma generating the Kuluncak ophiolite is similar in composition to those observed in modern island-arc tectonic settings. Rare earth element (REE) concentrations of the mafic cumulates exhibit depleted light rare earth element (LREE) patterns, with CeN/SmN and CeN/YbN ratios ranging from 0.21 to 0.75 and from 0.17 to 0.66, respectively. The coexistence of anorthite-rich plagioclase (An73.4-93.7), highly magnesian olivine (Fo65.2-86.9), clinopyroxene (Mg#75-92.1), and orthopyroxene (Mg#77.6-84.3) in the cumulate gabbroic rocks is indicative of an intraoceanic subduction setting and suggests that the Kuluncak ophiolite was formed during the Late Cretaceous closure of the Inner Tauride Ocean.
AB - The Kuluncak (Malatya) ophiolite in the Eastern Tauride, Turkey, consists of mantle tectonites, ultramafic-mafic cumulates, isotropic gabbros, a sheeted dike complex, plagiogranites, and a volcanic complex. The best exposure of the mafic cumulate rocks of the Kuluncak ophiolite is in the Hekimhan region, where they are represented by olivine gabbro and gabbro showing orthocumulate to mesocumulate textures. The cumulus and postcumulus minerals do not show significant zoning. The crystallization order of the cumulates is olivine, plagioclase, clinopyroxene and orthopyroxene. Whole-rock major- and trace-element geochemistry of the mafic cumulate rocks indicates that the primary magma generating the Kuluncak ophiolite is similar in composition to those observed in modern island-arc tectonic settings. Rare earth element (REE) concentrations of the mafic cumulates exhibit depleted light rare earth element (LREE) patterns, with CeN/SmN and CeN/YbN ratios ranging from 0.21 to 0.75 and from 0.17 to 0.66, respectively. The coexistence of anorthite-rich plagioclase (An73.4-93.7), highly magnesian olivine (Fo65.2-86.9), clinopyroxene (Mg#75-92.1), and orthopyroxene (Mg#77.6-84.3) in the cumulate gabbroic rocks is indicative of an intraoceanic subduction setting and suggests that the Kuluncak ophiolite was formed during the Late Cretaceous closure of the Inner Tauride Ocean.
KW - Cumulate
KW - Inner Tauride. Turkey
KW - Mineral chemistry
KW - Ophiolite
KW - Suprasubduction zone
UR - http://www.scopus.com/inward/record.url?scp=85026646260&partnerID=8YFLogxK
U2 - 10.4454/ofioliti.v42i2.450
DO - 10.4454/ofioliti.v42i2.450
M3 - Article
AN - SCOPUS:85026646260
VL - 42
SP - 81
EP - 103
JO - Ofioliti
JF - Ofioliti
SN - 0391-2612
IS - 2
ER -