Presentation on theme: "IZOLA 01 The first video-shot of the submarine spring, recorded with an emersed camera. Camera & copyright: Alfred Zajič, PLK."— Presentation transcript:
IZOLA 01 The first video-shot of the submarine spring, recorded with an emersed camera. Camera & copyright: Alfred Zajič, PLK
SUBMARINE SPRINGS IN FRONT OF IZOLA Alfred Zajič 1, Jože Žumer 1,2 1 diving club Potapljači Luke Koper 2 speleo club Krasoslovno društvo Anthron results of the preliminary researches in summer and autumn, 2002
MAIN RESEARCH REGIONS with found springs Ro – Ronek, Bs – Bele skale, Iz - Izola Ro Bs Iz The Gulf of Koper, 1: , 1999, by “Geodetski inštitut Slovenije” for “Upravo RS za pomorstvo”, MOP.
TOPOGRAPHIC BASIS surveys: Naval Oceanographic Office, USA, 1998 detailed surveys for making an inventory and morphology studies of the springs are not yet available The Gulf of Koper, 1: , 1999, by “Geodetski inštitut Slovenije” for “Upravo RS za pomorstvo”, MOP.
REGIONAL GEOLOGICAL BASIS the contact between the African and Eurasian tectonic plates the Trieste – Pazin syncline limestone below the flysch sediments and on the margins of the syncline Geological map Trieste 1:
LOCAL GEOLOGICAL BASIS the paleocene limestone dome at Izola the covering of eocene flysch at the surroundings possible overthrust ( ) from NE towards SW Geological map Trieste 1:
THE SHAPE OF THE BIGGEST SPRING funnel like hollow stressed bottom abyss relative depth: -13 m absolute depth: -31 m depth of the surrounding sea bottom : -19 m diameter of the upper edge of the hollow: about 20 m Survey sketch: Borisa Vuge, PLK
TYPICAL SHAPES OF THE SPRINGS The biggest spring: funnel-like hollow abyss on bottom Survey sketch: Boris Vuga, PLK
TYPICAL SHAPES OF THE SPRINGS smaller springs: cone-like depressions, without the bottom abysses
TYPICAL SHAPES OF THE SPRINGS the smallest springs: shallow basins thick layers of soft sediment molehill-like elevations of soft sediment
OTHER CHARACTERISTICS OF THE SPRINGS DISCHARGES from oozing to about 1000 l/min TEMPERATURES from 22° to 30°C CHEMISTRY high contents of sulphur
THE BATHS AT IZOLA Panoramic engraving of Izola from 1829 with the exaggerated building of the thermal baths in the front. The spa was soon closed, probably because of the filling of the sprins by the minig in vicinity.
The divers have made the first liters of the raising thermal water muddy
The high buoyancy makes the jetting of the thermal water possible
The temperature of the water from the warmest spring was about 30° C.
The bottoms of the springs with higher discharge are filled with remnants of shells, highly coroded by the acids