G. Van Der KAADEN

ON RELATIONSHIP BETWEEN THE COMPOSITION OF CHROMITES AND THEIR TECTONIC-MAGMATIC POSITION IN PERIDOTITE BODIES IN THE SW OF TURKEY

Öz From a huge belt of peridotites, situated in the province of Muğla - SW Turkey, the general tectonic setting, age relations, composition and structure are discussed. In this belt many chromite deposits are scattered, some of them having economical importance. It is shown that differences of chromites, calculated from analyses of chromium ores, make it possible to distinguish between basal-middle and upper zone of the ultrabasic intrusion. This observation is of practical importance inasmuch as economical chromite deposits are mostly restricted to the basal - lower middle part of the peridotites. It also may be used to solve tectonic problems where alpine mountain building, resulting in overthrusts respectively thrust faults and posterior faulting, obliterated primary-magmatic relationship.

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BOWEN, N. L. and TUTLE, O. F. (1949): The system MgO-SiO2-H2O. Geol. Soc. Am. Bull. 60. p. 439-460.

CHUDOBA, K. F. and FRECHEN, J. (1950) : Ueber die plastische Verformung von Olivin. Neues Jb. Mineral. Abh. 81. p. 198.

HIESSLEITNER, G. (1952): Serpentin und Chrqmerz-Geologie der Balkanhalbinsel und eincs Teiles von Kleinasien. Jb. Geol. Bundesanstalt. Sondtrband II. Wien.

KAADEN, G. v. d. and MÜLLER, G. (1953) : Chemische Zusammensetzung von Chromiterzen a. d. Gegend von Gürleyikköy. (SW-Türkei) u. s. w. Bull. Geol. Sac. of Turkey. Vol. IV. p. 61-79.

KAADEN, G. v. d. and METZ, K. (1954): Beitrage zur Geologie des Raumes zwischen DatçaMuğla-Dalaman Çay (SW-Anatolien) Bull. Geol. Soc. of Turkey Vol. V. p. 71-171.

PHILIPPSON, A. (1918) : Handbuch der regionalcn Geologie. V. 2. Heidelberg.

RIETZ, T. du (1956) : The content of chromium and nickel in the Caledonian ultrabasic rocks of Sweden. Geol. For. Förh. Bd. 78. Stockholm, p. 235.

ROEVER, W. de (1953) : Tectonic conclusions from the distribution of the metamorphic facies in the island of Kabaena, near Celebes. Proc. Seventh Pacific Science Congress V. 2. p. 80.

SCHORMANN, H. M. E. (1956): Beitrage zur Glaucophanfrage. (3) Neues Jb. Mineral. Abh. 89 p. 83.

WIJKERSLOOTH, P de. (1954) : Einiges über die Entstchung von Chromitlagerstattet an Hand von neuen Beobachtungen in Anatolien. Neues Jb. Mineral. Abh. p. 190-200.