Naslov
Carbon isotopes in environmental and palaeoclimate investigations

Autori
Horvatinčić, Nada

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts, 23rd Croatian Meeting of Chemists and Chemical Engineers, Osijek 2013 / Hadžiev, Andreja ; Blažeković, Zdenko - Osijek : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2013, 14-14

ISBN
978-953-6894-50-5

Skup
23rd Croatian Meeting of Chemists and Chemical Engineers

Mjesto i datum
Osijek, Hrvatska, 21.04.2013. - 24.04.2013

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
carbon isotopes; environment; palaeoclimate

Sažetak
Natural cosmic-ray produced radiocarbon 14C is a part of the CO2 cycle and through the atmosphere-biosphere-hydrosphere exchange process has been introduced to the environment. Anthropogenic disturbance of the natural 14C activity caused by nuclear tests, nuclear power plants and fossil fuel combustion has been recorded in the atmospheric CO2. In the karst environment, which includes water, carbonate sediments (speleothem, tufa, lake sediment), soil and vegetation (terrestrial and aquatic plants), the exchange processes within the CO2 – dissolved inorganic carbon (DIC) – CaCO3 system play an important role. This system is very sensitive to any change in the atmosphere, and response to the contamination is very fast. Ratio of stable isotopes of carbon 13C/12C (13C value) of each material in the nature gives additional information of carbon origin and geochemical processes in the system. Assuming isotopic equilibrium during calcite precipitation then terrestrial carbonates such as tufa, speleothem or lacustrine sediment can provide a record of environmental and climatic information. Results of investigation of the Dinaric Karst in Croatia using carbon isotope analyses of 13C/12C and 14C will be presented through the following applications: 1) the exchange processes of 13C and 14C between atmospheric CO2, DIC in water and recent carbonate precipitated in surface water in form of tufa and lake sediment in the Plitvice Lakes and Korana River ; 2) human induced impact of 14C in the karst environment ; 3) influence of climate change/sea level change to the formation of calcite deposits in form of speleothem, tufa and biogenic/algal littoral rims in the Dinaric karst.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Kemija

POVEZANOST RADA