Pretražite po imenu i prezimenu autora, mentora, urednika, prevoditelja

Napredna pretraga

Pregled bibliografske jedinice broj: 617392

Determination of equilibrium conditions of carbonate precipitation in Postojna Cave with application to paleoclimatology


Mandić, Magda
Determination of equilibrium conditions of carbonate precipitation in Postojna Cave with application to paleoclimatology, 2013., doktorska disertacija, Prirodoslovno matematički fakultet, Zagreb


CROSBI ID: 617392 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Determination of equilibrium conditions of carbonate precipitation in Postojna Cave with application to paleoclimatology

Autori
Mandić, Magda

Vrsta, podvrsta i kategorija rada
Ocjenski radovi, doktorska disertacija

Fakultet
Prirodoslovno matematički fakultet

Mjesto
Zagreb

Datum
31.1

Godina
2013

Stranica
204

Mentor
Krajcar Bronić, Ines ; Leis, Albrecht

Ključne riječi
Stable isotopes; mass spectrometry; paleoclimatology; Postojna Cave

Sažetak
The contents of stable carbon and oxygen isotopes, 13C and 18O, in secondary precipitated carbonates (speleothems) of caves in karst areas can provide important information about paleoclimatic conditions of the area if the speleothems are formed at equilibrium conditions, i.e., if the isotopic composition of speleothems depends only on the deposition temperature. The purpose of this study was to determine areas within Postojna Cave with isotopic equilibrium conditions of carbonate precipitation where future paleoclimate research may be conducted. Environmental factors (temperature, concentration of atmospheric CO2), chemical composition of drip water, isotopic composition of water, CO2 and deposited carbonates were monitored during one year at nine locations. Difference between d13C in modern carbonates and in DIC was compared with the equilibrium fractionation factor e. Fractionation factor a was determined from measured d18O values of drip water and carbonates and compared to its equilibrium value aeq. Although environmetal and chemical parameters pointed to the fulfillment of preconditions for isotopic equilibrium precipitation of carbonates, specially at inner locations, isotopic composition of carbonates, both d13C and d18O, did not show equilibrium precipitation at most of the studied locations. Only locations 06 – Stebrišče and 09 – Zgornji Tartar have the potential for future paleoclimatic studies. It was also shown that recent carbonate precipitated on watch glasses did not reflect the isotopic composition of speleothems at the same location. Process of prior calcite precipitation was identified at location Podrti kapnik.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Geologija



POVEZANOST RADA


Ustanove:
Prirodoslovno-matematički fakultet, Zagreb

Profili:

Avatar Url Ines Krajcar Bronić (mentor)

Avatar Url Đina Albrecht (mentor)

Avatar Url Magda Mandić (autor)

Citiraj ovu publikaciju

Mandić, Magda
Determination of equilibrium conditions of carbonate precipitation in Postojna Cave with application to paleoclimatology, 2013., doktorska disertacija, Prirodoslovno matematički fakultet, Zagreb
Mandić, M. (2013) 'Determination of equilibrium conditions of carbonate precipitation in Postojna Cave with application to paleoclimatology', doktorska disertacija, Prirodoslovno matematički fakultet, Zagreb.
@phdthesis{phdthesis, author = {Mandi\'{c}, M.}, year = {2013}, pages = {204}, keywords = {Stable isotopes, mass spectrometry, paleoclimatology, Postojna Cave}, title = {Determination of equilibrium conditions of carbonate precipitation in Postojna Cave with application to paleoclimatology}, keyword = {Stable isotopes, mass spectrometry, paleoclimatology, Postojna Cave}, publisherplace = {Zagreb} }
@phdthesis{phdthesis, author = {Mandi\'{c}, M.}, year = {2013}, pages = {204}, keywords = {Stable isotopes, mass spectrometry, paleoclimatology, Postojna Cave}, title = {Determination of equilibrium conditions of carbonate precipitation in Postojna Cave with application to paleoclimatology}, keyword = {Stable isotopes, mass spectrometry, paleoclimatology, Postojna Cave}, publisherplace = {Zagreb} }




Contrast
Increase Font
Decrease Font
Dyslexic Font