ORIGINAL PAPER Correlation of Triassic advanced rifting-related Neotethyan submarine basaltic volcanism of the Darno ´ Unit (NE-Hungary) with some Dinaridic and Hellenidic occurrences on the basis of volcanological, fluid–rock interaction, and geochemical characteristics Gabriella Kiss • Ferenc Molna ´r • Ladislav A. Palinkas ˇ • Sa ´ndor Kova ´cs • Hazim Horvatovic ´ Received: 16 August 2009 / Accepted: 17 July 2011 Ó Springer-Verlag 2011 Abstract Comparative volcanological, mineralogical, petrological, and geochemical studies of blocks of Triassic submarine basalt occurrences hosted by the Jurassic me ´l- ange have been carried out. The studied localities are located in displaced parts of the Dinarides in NE-Hungary (Darno ´ Unit), in the Dinarides (Kalnik Mts., Croatia and Vares ˇ-Smreka, Bosnia and Herzegovina), and in the Hel- lenides (Stragopetra, Greece). The common characteristic of the studied occurrences is the well observable result of the lava–water-saturated sediment mingling, i.e., the pres- ence of the so-called carbonate peperitic facies. Mixing of the basaltic lava with pelagic lime mud (representing the unconsolidated stage of the red, micritic limestone), as well as fluid inclusion and chlorite thermometry data support that the carbonate peperite was formed above CCD and at the Bosnian locality, a shallower water, about 1.4 km depth is proven. The igneous rocks show mainly within-plate basalt geochemical characteristics; MORB signatures are not common. Low temperature ( \ 200°C) hydrothermal alteration is characteristic to the pillow basalt blocks with peperitic facies. The similarities in the volcanological, geochemical, and textural characteristics observed at the different localities support a strong genetic connection among them. The results of this study suggest to the advanced rifting stage origin of the Triassic basaltic suits and their distinction from the true oceanic basalt pillow units of the Dinarides can be based on the occurrences of the peperite facies. Keywords Triassic peperite Á Rift Á Accretionary me ´lange Á Intraplate volcanism Abbreviations Bas Basalt BM Biomold Cc Calcite Chl Chlorite G Glass Hem Hematite L Limestone Pl Plagioclase Pr Prehnite Ps Pseudomorph after earlier mafic mineral Px Pyroxene R Radiolarite Introduction The origin of the submarine basaltic rocks of the NE- Hungarian Darno ´ Unit, which is a displaced fragment of the Dinarides together with other units of the Bu ¨kk Mts. and their possible relationship with similar occurrences in G. Kiss (&) Á F. Molna ´r Faculty of Science, Department of Mineralogy, Eo ¨tvo ¨s Lora ´nd University, Pa ´zma ´ny P. stny 1/c, 1117 Budapest, Hungary e-mail: gabriella-kiss@chello.hu L. A. Palinkas ˇ Faculty of Science, Institute of Mineralogy and Petrology, University of Zagreb, Horvatovac bb, 10000 Zagreb, Croatia S. Kova ´cs MTA-ELTE Geological, Geophysical and Space Science Research Group, Pa ´zma ´ny P. stny. 1/c, 117, Budapest, Hungary H. Horvatovic ´ Geological Survey of Bosnia and Herzegovina, Ustanic ˇka 11, 71210 Ilidz ˇa, Sarajevo, Bosnia and Herzegovina 123 Int J Earth Sci (Geol Rundsch) DOI 10.1007/s00531-011-0706-7