FN Archimer Export Format PT J TI Échantillons rocheux provenant de « volcans de boue » de Méditerranée orientale OT Clasts from 'mud volcanoes' from the eastern Mediterranean BT AF HUGUEN, Caroline BENKHELIL, J GIRESSE, P MASCLE, Jean MULLER, C WOODSIDE, John ZITTER, T AS 1:;2:;3:;4:;5:;6:;7:;8:; FF 1:;2:;3:;4:;5:;6:PDG-DOP-DCB-GM;7:;8:; C1 Observ Oceanol Villefranche, Geosci Azur, F-06235 Villefranche Sur Mer, France. Univ Perpignan, LSM, F-66000 Perpignan, France. Free Univ Amsterdam, NL-1081 HV Amsterdam, Netherlands. C2 UNIV PARIS 06, FRANCE UNIV PERPIGNAN, FRANCE UNIV AMSTERDAM, NETHERLANDS SI BREST BREST,SIEGE AUTRE SE PDG-DOP-DCB-GM-LGG AUTRE PDG-DOP-DCB-GM IF 0.621 TC 11 UR https://archimer.ifremer.fr/doc/00068/17931/15469.pdf LA French DT Article CR MEDINAUT BO Le Nadir DE ;clasts;eastern Mediterranean;deep dives;'mud volcanoes' AB In the eastern Mediterranean, numerous argilo-kinetic manifestations, commonly named 'mud volcanoes', have been identified and studied in some detail during the last twenty years using several techniques. The Medinaut survey (December 1998) has provided new insights into this phenomenon through twenty deep dives performed with the submersible Nautile within two areas particularly active in terms of mud expulsions: the central Mediterranean ridge south of Crete, and the Anaximander mountains area, south of Turkey. The morphology, petrography, microstructure and biostratigraphy of different clasts sampled in the two areas helped to better understand the mud volcano formation and subsequent evolution. Paleoenvironmental conditions, ranging from deep marine deposition in distal deep-sca-fan environment during the Miocene (Mediterranean ridge) to continental margin conditions (Anaximander mountains), have been evaluated for the composition and age of the various rock types. Macroscopic and microscopic structural observations have revealed a close control of clast shapes by sets of early microfractures (calcite veins, joints) created before the clast expulsion to the seabed surface. Surface features, such as erosion marks, alteration aureoles or calcitic coatings, have also been described on most samples. Finally, erosion traces, alteration aureoles and calcitic coating observed for the first time are interpreted as the result of a complex cold seep context related to mud expulsion and associated fluid venting. (C) 2001 Ifremer/CNRS/IRD/Editions scientifiques et medicales Elsevier SAS. PY 2001 PD JUN SO Oceanologica Acta SN 0399-1784 PU Gauthier-villars/editions Elsevier VL 24 IS 4 UT 000171338500003 BP 349 EP 360 DI 10.1016/S0399-1784(01)01152-5 ID 17931 ER EF