Türkiye Jeoloji Bülteni

Abstract: Samples from various igneous and metamorphic rocks ofthe Kazdağ Massif (at the north of the gulf of Edremit), at the end ofgeochronological analyses, were subjected to Rb-Sr and K-A methods. The analyses give three groups of age: alpine, mesozoic and paleozoic. 

Abstract: Bu tebliğde, kesin hesaplan öngören mühendistik işleri için gerekli mühendislik jeolojisi araştırmalarında kayaların, sadece, kumtaşı, şeyl veyakireçtaşı gibi tanımlanmasının yeterli olmadığı belirtilerek, kayaların fiziközelliklerine göre, ölçülebilen parametrelerle, etüt etmek gerektiği üzerinde durulmuştur. Bu tür etüdlerde loglar, önemli ve etkili bir araştırma yoluolduğundan, logların Türkiye Mühendislik jeolojisi etütlerine neler getirebileceği tartışılmıştır. Bilhassa, teknik ye ekonomik yönden, bu metodlarüzerinde durulacak birkaç örnekte yetinilmiştir.  

Abstract: L`une des activités de l`Institut de Recherches des Ressources Naturelles en Iran est de déterminer l`efficacité des différentes couverturesvégétales comme les buissons, les pâturages et les forêts ainsi que lesinstallations de conservation du sol: sillons parallèles aux courbes deniveau, terrasses et banquettes dans la lutte contre l`érosion.On sait que l`érosion se produit surtout dans les régions où le climatest aride, la saison sèche se prolonge et les pluies sont violentes et torrentielles. 

Abstract: Le défict d`eau dans les régions arides est un probleme qui depuislongtemps a attiré l`attention de l`homme. On a effectué plusieurs expériences pour lutter contre cette sécheresse et améliorer les conditions du milieu.Bien qu`il existe différentes manières pour mieux utiliser l`eau on n`apas encore trouvé une matière pour assurer son remplacement. 

Abstract: The reefoid limestones which crop out along the Southern foothills of Istranca Mountains have become attractive in the last decade,especially for petroleum exploration companies. There exist some workswhich are particularly focussed on those limestones contemplated as apromising reservoir rock for oil exploration in the Ergene Basin.The most characteristic portions of the reefoid limestones are located inthe Pınarhisar ,and vicinity. İn that sector the gentle southerly dippinghomocline of Tertiary deposits, overlies the metamorphic basementof Paleozoic / older (basement comlex) rocks. The studied sedimentary sequence consist of classics ,and marl (İslambeyli formation), thecomformably overlying oolite bearing pellet limestone of Oligocene age (Pınarhisar formation). The investigation is limited by the basement complex ,and Miocene (?)beds which comformably overly the Pınarhisar formation to the north ,and south respectively.The limestones of the Pınarhisar reef complex which cover 2/3 of thestudied ares, were diveded in reef elements by both field ,and microscopic observations.Folk’s limestone classification was generally used for naming the carbonate samples, excluding the terms used in field studies.

Abstract: The area discussed lies in the northern part of the central TaurusMountains, which form part of the Taurus orogenic belt. It contains thesurroundings of Hadim ,and Bozkır cities. The lithological units of Paleozoic ,and younger ages, deposited in different basins, are now in faultedcontact. The Hadim ,and Geyikdağı units are autochthonous, while theSouth Central Anatolia ,and the Central Taurus units are allochthonous.Evidence shows that the allochthonous South Central Anatolia Unit camefrom south central Anatolia. This unit has great litological affinity to themetamorphic Paleozoic rock which occur widespread to the north of thearea discussed, in south central Anatolia. Further, folds in the underiyingautochthonous Hadim Unit, which is in fault contact with the overlingSouth Central Anatolia Unit, suggest again transport of the latter unit. Theauthor proposes that the allochthonous Central Taurus Unit -named byBlumenthal the «Hadim nappe» / «Palaezoic of Hadim» - is as a wholenot a nappe but has moved both in northerly ,and southerly direction. Thepresence of the folds ,and reverse faults which have developed near thefault contacts ,and the stratigraphic correlation with nearby stratigraphieunits both to the south ,and north substantiate this proposal. The HadimUnit which aiso includes Cambrian ,and Ordovician sediments was deposited in a basin flanked by the afore mentioned allochthonous units.The Geyikdağı autochthonous unit which lies to the south of the CentralTaurus Unit does not fall within the framework of this paper. All units arecut by thrust faults dipping NE. Both the transport of the allochthonousunits ,and the development of thrust faults occurred within post-Lutetian ,and pre-Miocene time interval. The transport of the allochthonous Central Taurus Unit took place after the transport of the South Central Anatolia Unit; but evidence for different times of transport of different units hasnot been found. At least since the Upper Devonian vertical block movements were dominant in the structural evolution. The disconformities between different lithological units are mostly not angular in character, ,andrepresent thus evidence for vertical novement. It is proposed that verticalblock movements produced gravitational spreading ,and are the cause ofthe lateral shifts of the allochthonous units. This proposal depends on theabsence of big folds with horizontal axial planes, on the absence of overturning both in the South Central Anatolia Unit which travelled a longdistance ,and in Central Taurus Unit which shows movements both to thesouth ,and to the north, ,and on the position of the big thrust fault bounding the Central Taurus Unit to the north.