GEOLOGICA ULTRAIECTINA Mededelingen van de Faculteit Geowetenschappen Universiteit Utrecht No. 271 Bio- and Petroleum Geochemistry of Mud Volcanoes in the Sorokin Trough (NE Black Sea) and in the Gulf of Cadiz (NE Atlantic): From Fluid Sources to Microbial Methane Oxidation and Carbonate Formation Alina N. Stadnitskaia Bio- and Petroleum Geochemistry of Mud Volcanoes in the Sorokin Trough (NE Black Sea) and in the Gulf of Cadiz (NE Atlantic): From Fluid Sources to Microbial Methane Oxidation and Carbonate Formation Biogeochemie en Petroleum Geochemie van Moddervulkanen in de Sorokin Trog (noordoostelijke Zwarte Zee) en in de Golf van Cadiz (noordoostelijke Atlantische Oceaan): Over de Oorsprong van uit de Aardkorst Ontsnappende Modder en Koolwaterstofgas, Microbiёle Oxidatie van Methaan en Carbonaatvorming (met een samenvatting in het Nederlands) Биохимия и Нефтяная Геохимия Грязевых Вулканов из Прогиба Сорокина (Северо-Восточная Часть Черного Моря) и из Залива Кадис (СевероВосточная Атлантика): Источники Глубинных Флюидов, Микробиальное Окисление Метана и Формирования Аутигенных Карбонатов ( С резюме на русском языке) Proefschrift ter verkrijging van de graad van doctor aan de Universiteit Utrecht op gezag van de rector magnificus, prof.dr. W.H. Gispen, ingevolge het besluit van het college voor promoties in het openbaar te verdedigen op maandag 22 januari 2007 des middags te 2.30 uur door Alina Nikolaievna Stadnitskaia geboren op 18 juli 1974, te Moskou, Rusland Promotores: Prof. Dr. Ir. J.S. Sinninghe Damsté Prof. Dr. T.C.E. van Weering Prof. Dr. M.K. Ivanov These studies were supported by a fellowship of the President of the Russian Federation, by a grant from the Huygens Programme of the Netherlands Organization for International Cooperation in Higher Education (Nuffic), and by the cooperative NWO/РФФИ DutchRussian project between the Royal Netherlands Institute for Sea Research (NIOZ, the Netherlands) and the UNESCO/Moscow State University Centre for Marine Geology and Geophysics (Russia) entitled “Evolution and Ecology of Cold Seep Structures in the Gulf of Cadiz”. MUD VOLCANO Leagues beneath the grey-green surface rumbles Neptune's seething mound. Oozing molten muck and seeping gas it reigns, dark and forbidding, unbidden. It's pressured rage spewing forth a vaporous plume into the unsuspecting world above. It's summit wears a frozen crystal lattice crown; White, ice-like, unearthly. Ice and fire entombed by earth and water. A towering monument encircled by ghostly moat it reeks of primal violence, fractured crusts; The stuff of legend gurgling from its core The heat of forgotten eons rising to the ocean floor. And on its surface roils the wormed monster, guarding the sacred fire from prying eyes. Like twisted roots the vermicular horde writhes across the mud; White, worm-like, unearthly. Life forms sucking the residue of decay. Original version by Sherrod Sturrock. Geo-Marine Letters 19: 169-170 (1999). To Vera N. and Irina G. Stadnitskaia