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Geologische Rundschau

, Volume 72, Issue 1, pp 239–252 | Cite as

Geochemistry and tectonic significance of altered basaltoids from the Pontic Ranges, Turkey

  • Musa Güner
Aufsätze

Abstract

The basaltoids of the Küre area, Pontides of northern Turkey, associate with eugeosynclinal greywackes and black shales. They comprise massive flows, pillow lavas, and cutting diabase dikes. In the submarine environment and still more during the formation of the Küre copper ores, the basaltoids were severely altered, which affected particularly their alkali contents. In spite of variable proportions of main components, the study of stable trace elements permits a confident identification of the rocks as tholeiites of ocean floor affinity. The Küre basaltoids are considered to have been generated during the expansion of the marginal basin of the Anatolian troughs.

Keywords

Shale Turkey Black Shale Cela Greywackes 

Zusammenfassung

Die Basalte des Küregebietes in den Pontiden der nördlichen Türkei sind mit eugeosynklinalen Grauwacken und schwarzen Schiefer verbunden. Sie enthalten massive Ergußgesteine, Pillowlaven und durchschlagen Diabasgänge. Im marinen Ablagerungsraum und hier speziell während der Küre-Coppererze wurden die Basalte sehr stark verändert; dies hat speziell ihren Alkaligehalt beeinflußt. Trotz der unterschiedlichen Hauptzusammensetzungen der Hauptkomponenten erlaubt das Studium der Spurenelemente eine hinreichende Identifikation dieser Gesteine als Tholeiite ozeanischer Kruste. Die Kürebasalte könnten während der Expansionsphase in einem randlichen Becken des anatolischen Troges entstanden sein.

Résumé

Les basaltes de la région de Küre dans les Pontides de la Turquie septentrionale sont associés à des grauwackes et à des schistes noirs eugéosynclinaux. Ils renferment des coulées massives, de laves en coussins et recoupent des dikes de diabase. Dans l'aire de sédimentation marine, et ici spécialement pendant la minéralisation en cuivre de Küre, les basaltes ont été fortement altérés, et en cela spécialement leur teneur en alcalis. Malgré les différences dans les principales compositions des constituants majeurs, l'étude des éléments en traces permet d'arriver à identifier ces roches comme des tholéiites de croûte océanique. Les basaltes de Küre pourraient avoir pris naissance au cours de la phase d'expansion dans un bassin en bordure du fossé anatolien.

Краткое содержание

Базальты области Küre f П онтидах северной Тур ции связаны с евгеосинклиналью, в которой залегают гр аувакки и черные слан цы. Кроме того здесь находятся также и эру птивные породы, подуш ечные лавы и жилы диабазов. В морских отложениях и, в особенности, в зоне отложения медных руд установили, что химич еский состав базальт ов очень отличается от их преж него состава. Несмотря на р азличие в содержании основных компонентов, изучение распределе нния микроэлементов разрешает идентифицировать эт и породы, как толеины ок еанической коры. База льты Küre могли образоваться во время фазы экспанс ии краевого бассейна анатолийского трога.

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Copyright information

© Ferdinand Enke Verlag Stuttgart 1983

Authors and Affiliations

  • Musa Güner
    • 1
  1. 1.Department of GeologyUniversity of LundLundSweden

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