Origin of analcime in the Neogene Arikli Tuff, Biga Peninsula, NW Turkey

Download
2012-01-01
The Arikli Tuff in the Behram Volcanics, NW Anatolia, is characterized by its dominance of authigenic analcime. It was studied by optical microscopy, XRD, SEM/EDX, and ICP for a better understanding of the analcime formation, which occurs as coarse-grained euhedral to subhedral crystals in pores and pumice fragments as well as in clusters or fine-grained single crystals embedded in the matrix. Besides analcime, K-feldspar, dolomite, and smectite are found as further authigenic minerals. Based on the dominance of these authigenic minerals, the tuffs are petrographically separated into phyllosilicate-bearing vitric tuff, dolomite-rich vitric tuff, and K-feldspar-dominated vitric tuff. No precursor of zeolites other than analcime was detected. Petrographical and SEM investigations indicate that euhedral to subhedral analcime crystals found as a coarse-grained filling cement in voids and pumice fragments are precipitated from pore water, whereas fine-grained disseminated crystals are formed by the dissolution-precipitation of glassy material. Hydrolysis of glassy material that is similar in composition to analcime provides the additional Na, Al, Si, and K elements which arc necessary for the formation of analcime.
NEUES JAHRBUCH FUR MINERALOGIE-ABHANDLUNGEN

Suggestions

The ghost of herbivory past: slow defence relaxation in the chlorophyte Scenedesmus obliquus
Verschoor, Antonie M.; Bekmezci, Ozan K.; Van Donk, Ellen; Vijverberg , Jacobus (PAGEPress Publications, 2009-8-1)
The freshwater chlorophyte Scenedesmus obliquus (Turpin) Kützing produces colonies as an inducible defence against herbivores. We investigated the dynamics of Scenedesmus colony formation and disintegration in response to the density of the herbivorous rotifer Brachionus calyciflorus in large-scale mesocosms. Additional bioassays were performed to investigate Scenedesmus colony disintegration under different light regimes. In the mesocosm experiment, colony formation took place rapidly, but relaxation t...
Estimation of demography and seasonal habitat use patterns of anatolian mouflon (ovis gmelinii anatolica) in Konya Bozdag protection area using distance sampling
Özdirek, Lütfiye; Kence, Aykut; Department of Biology (2009)
The Anatolian mouflon (Ovis gmelinii anatolica) is an endemic ungulate subspecies and of IUCN Vulnerable status that inhabits Konya-Bozdag region located in Central Anatolia. In this thesis, the demography and habitat use of the only natural population of Anatolian mouflon at Konya-Bozdag Provice is studied. Throughout the study, distance sampling techniques, specifically line transect sampling, are used to estimate density, size and growth rate of this population. Sex, age and count data are used to estima...
TECTONIC CONTROL ON THE DEVELOPMENT OF THE NEOGENE QUATERNARY CENTRAL ANATOLIAN VOLCANIC PROVINCE, TURKEY
TOPRAK, V; Göncüoğlu, Mehmet Cemal (1993-12-01)
The Neogene-Quaternary Central Anatolian Volcanic Province (CAVP) is elongated in a north-east south-west direction within pre-Oligocene basement in central Turkey. This study investigates the field evidence relating to the development of the CAVP.
Hydrous aluminosilicate metasomatism in an intra-oceanic subduction zone: Implications from the Kurancali (Turkey) ultramafic-mafic cumulates within the Alpine Neotethys Ocean
Toksoy Köksal, Fatma; Göncüoğlu, Mehmet Cemal (2009-03-01)
The Kurancali ultramafic-mafic cumulate body, an allochthonous ophiolitic sliver in central Anatolia, is characterized by the presence of abundant hydrous phases (phlogopite, pargasite) besides augitic diopside, plagioclase, and accessory amounts of rutile, sphene, apatite, zircon, and calcite. Based on modes of the essential minerals, the olivine-orthopyroxene-free cumulates are grouped as clinopyroxenite, hydrous clinopyroxenite, phlogopitite, hornblendite, layered gabbro, and diorite. Petrographical, min...
Plio-quaternary evolution of the Kucuk Menderes Graben southwestern Anatolia, Turkey
Rojay, B; TOPRAK, VEDAT; Demirci, C; Süzen, Mehmet Lütfi (2005-05-01)
The Kucuk Menderes Graben (KMG) is part of the horst-graben system of southwestern Anatolia (Turkey), bounded by the Bozdag horst in the north and the Aydin horst in the south. The Plio-Quatemary evolution of the KMG has been evaluated using the nature of the Miocene-Quaternary fill sediments and palaeostress analysis of slip data measured in different parts of the graben.
Citation Formats
S. Ozen and M. C. Göncüoğlu, “Origin of analcime in the Neogene Arikli Tuff, Biga Peninsula, NW Turkey,” NEUES JAHRBUCH FUR MINERALOGIE-ABHANDLUNGEN, pp. 21–34, 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32221.