International Geological Journal - Official Journal of the Carpathian-Balkan Geological Association

SPINEL-HORNBLENDE-ANTHOPHYLLITE (NEPHRITOID) NEOLITHIC AXES FROM WESTERN SLOVAKIA

Pages: 137 - 140

Authors: DUSAN HOVORKA, LUDMILA ILLASOVA, SERGEY KORIKOVSKY

Abstract: Among artifacts from several localities/sites in western Slovakia (the Male Karpaty Mts. and the Danube Upland (Podunajska pahorkatina) those composed of green Al-rich spinel, hornblende and anthophyllite are characteristic. Other minerals (olivine, clinozoisite, muscovite, ilmenite, magnetite and sphene) are present in accessory amounts. The stones bear several characteristics of nephrites. In paper we use the common term „nephritoids“ for various varieties of the discussed rocks. Primary occurrences of these Al-rich spinel-hornblende-anthophyllite rocks are not yet known. On the basis of the predominance of hornblende and anthophyllite, the rocks under consideration are thought to be products of medium-temperature metamorphism of spinel bearing orthopyroxene-clinopyroxene rocks (ferroultramafics) under static conditions and high P/H2O.

Keywords: Neolithic, axes, (Al-rich) spinel-hornblende-anthophyllite (nephritoid) rocks

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