The Hasan Dagi stratovolcano (Central Anatolia, Turkey): evolution from calc-alkaline to alkaline magmatism in a collision zone

Deniel, Catherine; Aydar, Erkan; Gourgaud, Alain

doi:10.1016/s0377-0273(98)00097-3

Cited by 104 publications

(99 citation statements)

References 31 publications

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“…In the pre-CI Mediterranean volcanic record, a small number of explosive eruptions are believed to have generated widespread rhyolitic tephra layers. These include eruptions from Nisyros Island in the Hellenic Arc (Volentik et al, 2005;Tomlinson et al, 2012b) and numerous eruptions from rhyolitic centres in the Central Anatolian Province such as Acigöl and Hasan Dagi (Deniel et al, 1998;Kuzucuoglu et al, 1998;Mouralis et al, 2002). However, all of these events are poorly dated, little is known about the distal dispersal of their tephra, and where single-grain glass chemistry is available it does not show a match for HF_T526/527, which at present, therefore, remains uncorrelated.…”

Section: Tephrochronologymentioning

confidence: 99%

The chronostratigraphy of the Haua Fteah cave (Cyrenaica, northeast Libya) — Optical dating of early human occupation during Marine Isotope Stages 4, 5 and 6

Jacobs

Farr

et al. 2017

Journal of Human Evolution

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a b s t r a c tThe 1950s excavations by Charles McBurney in the Haua Fteah, a large karstic cave on the coast of northeast Libya, revealed a deep sequence of human occupation. Most subsequent research on North African prehistory refers to his discoveries and interpretations, but the chronology of its archaeological and geological sequences has been based on very early age determinations. This paper reports on the initial results of a comprehensive multi-method dating program undertaken as part of new work at the site, involving radiocarbon dating of charcoal, land snails and marine shell, cryptotephra investigations, optically stimulated luminescence (OSL) dating of sediments, and electron spin resonance (ESR) dating of tooth enamel. The dating samples were collected from the newly exposed and cleaned faces of the upper 7.5 m of the w14.0 m-deep McBurney trench, which contain six of the seven major cultural phases that he identified. Despite problems of sediment transport and reworking, using a Bayesian statistical model the new dating program establishes a robust framework for the five major lithostratigraphic units identified in the stratigraphic succession, and for the major cultural units. The age of two anatomically modern human mandibles found by McBurney in Layer XXXIII near the base of his Levalloiso-Mousterian phase can now be estimated to between 73 and 65 ka (thousands of years ago) at the 95.4% confidence level, within Marine Isotope Stage (MIS) 4. McBurney's Layer XXV, associated with Upper Palaeolithic Dabban blade industries, has a clear stratigraphic relationship with Campanian Ignimbrite tephra. Microlithic Oranian technologies developed following the climax of the Last Glacial Maximum and the more microlithic Capsian in the Younger Dryas. Neolithic pottery and perhaps domestic livestock were used in the cave from the mid Holocene but there is no certain evidence for plant cultivation until the Graeco-Roman period.

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Section: Tephrochronologymentioning

confidence: 99%

The chronostratigraphy of the Haua Fteah cave (Cyrenaica, northeast Libya) — Optical dating of early human occupation during Marine Isotope Stages 4, 5 and 6

Jacobs

Farr

et al. 2017

Journal of Human Evolution

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“…Previous geological and petrological studies of the Hasan Dagi volcano have produced data (i.e., Ercan et al 1990; Aydar and Gourgaud 1998;Deniel et al 1998). Most previous workers used limited numbers of trace element data; therefore, their conclusions were not conclusive.…”

Section: Introductionmentioning

confidence: 99%

“…Hasan Dagi, one of two stratovolcanoes in central Turkey, covers an area of 760 km 2 with a volume of about 354 km 3 (Deniel et al 1998). Volcanic activity of the Hasan Dagi complex started 13 Ma and continued to less than 6,000 years ago .…”

Section: Introductionmentioning

confidence: 99%

“…To explain the wide range of compositional diversity in the rocks of the Hasan Dagi volcano, previous investigators have invoked widely differing processes including fractional crystallization of a mafic magma, assimilation and fractional crystallization, and magma mixing Deniel et al 1998). These conclusions are based on their interpretations of compositional trends in Harker diagrams, such as Sr-SiO 2 , Y-SiO 2 , or Y-Rb, and petrographic observations, such as the presence of cognate inclusions, disequilibrium textures, and microcumulates.…”

Section: Introductionmentioning

confidence: 99%

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An isobaric–isenthalpic magma mixing model for the Hasan Dagi volcano, Central Anatolia, Turkey

Doğan

Kilinc

et al. 2007

Bull Volcanol

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Calc-alkaline rocks of the Hasan Dagi volcano (Central Anatolia, Turkey) are products of arc volcanism triggered by continental collision. Volcanic rocks of the Hasan Dagi range in composition from basalt to rhyolite but are dominated by andesite and dacite. Considering only the mass transfer part of the process leads to an incomplete picture of magma chamber processes. The exclusion of simultaneous calculations of heat and mass transfer between mixing magmas, however, has prevented petrologists from gaining new insights into the magma mixing process. Thus, we report our experimental results in conjunction with modeling with MELTS to test the ideas concerning the petrogenesis of Hasan Dagi volcanic rocks and quantitatively model the relevant petrogenetic processes. Our results demonstrate that the chemical diversity of Hasan Dagi volcano is inconsistent with the closed-system crystallization and differentiation. Thus, (1) our experimental modeling, (2) the agreement between the liquid line of descent defined by the natural rock data and the MELTS calculations, and (3) the agreement between the mineralogy of the rocks and calculated mineralogy corroborate the conclusion that the isobaric-isenthalpic magma mixing of basalt and rhyolite is the major controlling process in the petrogenesis of the Hasan Dagi magmas.

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“…Neogene to Quaternary volcanism within Central Anatolia, especially Cappadocian ignimbrites, have been studied in some detail (Innocenti et al 1975;Le Pennec et al 1994;Druitt et al 1995;Mues-Schumacher and Schumacher 1996;Deniel et al 1998). There also have been a number of studies on the geological evolution of the Central Anatolian Crystalline Complex (Göncüoglu et al 1991(Göncüoglu et al , 1992(Göncüoglu et al , 1993, the age of metamorphism (Erkan and Ataman 1981;Alpaslan et al 1996), the petrogenesis of granitoids Boztug 2000), Palaeocene-Eocene volcanic rocks (Alpaslan and Temel 2000), and Upper Cretaceous to Palaeocene silicic volcanic rocks (Kus¸çu and Floyd 1995;Gençalioglu Kus¸çu andFloyd 1997, 2001).…”

mentioning

confidence: 99%

Magmatic processes and mixing origin of andesite: Miocene Karama?ara volcanics, Central Anatolia, Turkey

et al. 2005

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The Miocene Karamagara volcanics (KMV) crop out in the Saraykent region (Yozgat) of Central Anatolia. The KMV include four principal magmatic components based on their petrography and compositional features: basaltic andesites (KMB); enclaves (KME); andesites (KMA); and dacites (KMD). Rounded and ellipsoidal enclaves occur in the andesites, ranging in diameter from a few millimetres to ten centimetres. A non-cognate origin for the enclaves is suggested due to their mineralogical dissimilarity to the enclosing andesites. The enclaves range in composition from basaltic andesite to andesite. Major and trace element data and primitive mantle-normalized rare-earth element (REE) patterns of the KMV exhibit the effects of fractional crystallization on the evolution of the KME which are the product of mantle-derived magma.The KMA contain a wide variety of phenocrysts, including plagioclase, clinopyroxene, orthopyroxene, hornblende and opaque minerals. Comparison of textures indicates that many of the hornblende phenocrysts within the KMA were derived from basaltic andesites (KMB) and are not primary crystallization products of the KMA. Evidence of disequilibrium in the hybrid andesite includes the presence of reacted hornblendes, clinopyroxene mantled by orthopyroxene and vice versa, and sievetexture and inclusion zones within plagioclase.The KMV exhibit a complex history, including fractional crystallization, magma mixing and mingling processes between mantle and crust-derived melts. Textural and geochemical characteristics of the enclaves and their hosts require that mantlederived basic magma intruded the deep continental crust followed by fractional crystallization and generation of silicic melts from the continental material. Hybridization between basic and silicic melts subsequently occurred in a shallow magma chamber. Modelling of major element geochemistry suggests that the hybrid andesite represents a 62:38 mix of dacite and basaltic andesite. The implication of this process is that calc-alkaline intermediate volcanic rocks in the Saraykent region represent hybrids resulting from mixing between basic magma derived from the mantle and silicic magma derived from the continental crust.

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The Hasan Dagi stratovolcano (Central Anatolia, Turkey): evolution from calc-alkaline to alkaline magmatism in a collision zone

Cited by 104 publications

References 31 publications

The chronostratigraphy of the Haua Fteah cave (Cyrenaica, northeast Libya) — Optical dating of early human occupation during Marine Isotope Stages 4, 5 and 6

The chronostratigraphy of the Haua Fteah cave (Cyrenaica, northeast Libya) — Optical dating of early human occupation during Marine Isotope Stages 4, 5 and 6

An isobaric–isenthalpic magma mixing model for the Hasan Dagi volcano, Central Anatolia, Turkey

Magmatic processes and mixing origin of andesite: Miocene Karama?ara volcanics, Central Anatolia, Turkey

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