The deeply derived CO2 from tectonically active areas is contributing in a significant proportion,still unquantifiedin detail, to CO2 Earth degassing. Several studies highlighted how in thesetectonically active areas most of the CO2 is dissolved in the groundwaters circulating in the largeregional aquifers hosted by the permeable formations of the active orogens. Quantifying theamount of deep CO2 dissolved into groundwater can represent a powerful tool for regionalinvestigations, because springs are representative of their catchment area that can extend fromtens to hundreds of square kilometers.In the framework of a Deep Carbon Observatory supported project, we investigated for the firsttime, the geogenic carbon emission from the Balkan Peninsula (southeastern Europe). This areais known for its high carbon Earth degassing (both CO2 and CH4), but lacks the necessary datafor quantification and for determining the origin of carbon (especially for what regards theisotopic composition of dissolved carbon). We investigated thermal manifestations (thermalsprings and drillings), CO2 emission (including dry and wet moffetas), thermal wells containingCH4 and karst springs from tectonically active areas.During the field investigation, we visited Romania (Mangalia and Tyulenevo coastal area(Romania and Bulgaria), Apuseni Mountains, Ciuc Basin and Herculane Graben), Slovenia, CentralSerbia, Macedonia and Croatia visiting and collecting more than 350 sites. Water samples werecollected for water chemistry, water stable isotopes, carbon13from TDIC, dissolved H2S,dissolved gas composition, carbon13from CO2 and CH4 from dissolved gases, and for dissolvednoble gases (He, Ne, Ar). For those sites were also free gas was present, the team collected freegas samples for compositional, isotopic and noble gas analyses.The availability of this data is the first attempt in quantifying the carbon flux with real data fromthis tectonically active area.
|Title of host publication||Abstract Book Conference A. Rittmann Catania, 12-14 Febbraio 2020|
|Number of pages||1|
|Publication status||Published - 2020|