Naslov
Overview of hydrogeological, geochemical and mineralogical investigations of karstic aquifers of the Biokovo Mt, Croatia

Autori
Matić, Natalija ; Frančišković-Bilinski, Stanislav ; Bilinski, Halka

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Čovjek i krš 2011 / Man and karst - Zbornik radova / Proceedings / Lučić, Ivo ; Mulaomerović, Jasminko - Bijakovići : Međugorje : Sarajevo : Fakultet društvenih znanosti dr. Milenko Brkić Sveučilišta Hercegovina, Bijakovići - Međugorje i Centar za krš i speleologiju, Sarajevo, 2012, 203-211

ISBN
978-9958-0910-0-1

Skup
Čovjek i krš / Man and karst 2011.

Mjesto i datum
Bijakovići, Bosna i Hercegovina; Međugorje, Bosna i Hercegovina, 13.10.2011. - 16.10.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
karstic springs; dye tracing; trace elements; sediments; mineralogy

Sažetak
Three gravity springs which are included in the regional water supply system (Grebice, Podgorski Vrutak and Izbitac) from the slopes of the Biokovo Mt, Adriatic coast of Croatia were investigated. The aim of this paper is to give an overview of recent hydrogeological, geochemical and mineralogical investigations of watershed. The significance of performed study is particularly because such complex approach, combining several methods, is according to our knowledge used for the first time in the world karst systems to study springs. The applied combination of hydrogeological, geochemical and mineralogical methods was proved to be very useful for investigations of karstic aquifers. Hydrogeological investigations were performed during two seasons with dye tracing, using Na-fluoresceine which was poured into two pits, observing springs at distances of 1.82 – 8.8 km. Apparent velocities were 0.21 – 0.51 cms-1. Dye tracing was first time partially effective and second time ineffective, what could be due to immanent ore mineralization, which presents a natural barrier and was discovered by geochemical and mineralogical methods. Concentrations of 17 dissolved and total trace elements in spring waters were extremely low, more than 3 orders of magnitude less than allowed by the Croatian directives for the first category of groundwater and drinking water. The mass fractions of 60 elements were determined in spring sediments. From all determined elements in sediments lead had anomalous values and highest concentration was 5440 mgkg-1, which may indicate ore mineralization. Mineralogical analysis discovered and confirmed significant presence of unexpected mineral ramdohrite bismuthian, lead sulphide Ag4Pb6(Sb, Bi)11S24 what could explain extreme Pb concentrations measured in sediment samples of Izbitac and Podgorski Vrutak springs.

Izvorni jezik
Hrvatski, engleski

Znanstvena područja
Geologija

POVEZANOST RADA