Geotectonic Setting and Origin of  the Youngest Kula Volcanics (Western Anatolia), with a New Emplacement Model

MURAT TOKÇAER; SAMUELE AGOSTINI & MEHMET YILMAZ SAVAŞÇIN; Samuele AGOSTINI

Makale detayları

Geotectonic Setting and Origin of the Youngest Kula Volcanics (Western Anatolia), with a New Emplacement Model

Yazarlar:

MURAT TOKÇAER | SAMUELE AGOSTINI & MEHMET YILMAZ SAVAŞÇIN | Samuele AGOSTINI

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Earth Sciences 2005 Vol.14 Issue 2, pp.143-166

Belge Tipi:

Makale

Yayın Tarihi:

1/2005

Belge Dili:

Türkçe

Document ID (Org No.):

2000732747

Sıklık:

İki Aylık

eISSN:

1303-619X

pISSN:

1300-0985

Özet:

 

The Quaternary Kula volcanics are Na-dominant in character while all the older volcanic rocks of western Anatolia are generally definitive K-dominant rocks. As a unique example in western Anatolia, the existence of a huge amount of plateau basalts at Kula indicates rapid uplift of mantle material, as confirmed by new geochemical data.   Based on our field observations, the oldest Kula volcanics are the plateau basalts with more than one main lava flow. At the beginning of volcanic activity (first-period plateau basalts), this plateau was vast. Subsequently, parts of the first-period plateau basalts were uplifted and partly eroded while other parts were covered by younger lavas, tephra and sediments. The horsts, covered by plateau basalts, are well protected because of their resistance to erosion. During extensional activity, the development of cinder cones continued without hiatus. During the last period of volcanic activity, the youngest craters once again produced lava flows to form the second-period plateau basalts. As a result, there are more than 80 cinder cones with quite different erosional stages between the first and second plateau-basalt periods.  The Kula basalts are the only example of rapid uplifting of asthenospheric material in western Anatolia, and are interpreted to form due to the opening of a horizontal slab window as a consequence of the more rapid southwestward movement of the Aegean microplate overriding Africa, with respect to the Anatolian plate.

 

The Quaternary Kula volcanics are Na-dominant in character while all the older volcanic rocks of western Anatolia are generally definitive K-dominant rocks. As a unique example in western Anatolia, the existence of a huge amount of plateau basalts at Kula indicates rapid uplift of mantle material, as confirmed by new geochemical data.   Based on our field observations, the oldest Kula volcanics are the plateau basalts with more than one main lava flow. At the beginning of volcanic activity (first-period plateau basalts), this plateau was vast. Subsequently, parts of the first-period plateau basalts were uplifted and partly eroded while other parts were covered by younger lavas, tephra and sediments. The horsts, covered by plateau basalts, are well protected because of their resistance to erosion. During extensional activity, the development of cinder cones continued without hiatus. During the last period of volcanic activity, the youngest craters once again produced lava flows to form the second-period plateau basalts. As a result, there are more than 80 cinder cones with quite different erosional stages between the first and second plateau-basalt periods.  The Kula basalts are the only example of rapid uplifting of asthenospheric material in western Anatolia, and are interpreted to form due to the opening of a horizontal slab window as a consequence of the more rapid southwestward movement of the Aegean microplate overriding Africa, with respect to the Anatolian plate.

Makale detayları

Geotectonic Setting and Origin of the Youngest Kula Volcanics (Western Anatolia), with a New Emplacement Model

Yazarlar: MURAT TOKÇAER | SAMUELE AGOSTINI & MEHMET YILMAZ SAVAŞÇIN | Samuele AGOSTINI

Yayıncı: TUBITAK

Dergi: Turkish Journal of Earth Sciences 2005 Vol.14 Issue 2, pp.143-166

Belge Tipi: Makale

Yayın Tarihi: 1/2005

Belge Dili: Türkçe

Document ID (Org No.): 2000732747

Sıklık: İki Aylık

eISSN: 1303-619X

pISSN: 1300-0985

Sayı

Yazarlar:

MURAT TOKÇAER | SAMUELE AGOSTINI & MEHMET YILMAZ SAVAŞÇIN | Samuele AGOSTINI

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Earth Sciences 2005 Vol.14 Issue 2, pp.143-166

Belge Tipi:

Makale

Yayın Tarihi:

1/2005

Belge Dili:

Türkçe

Document ID (Org No.):

2000732747

Sıklık:

İki Aylık

eISSN:

1303-619X

pISSN:

1300-0985