Mineralne i rudne pojave na Ivanščici karakterizira jednostavna parageneza primarnih sulfida olova i cinka, s tragovima sulfida željeza i bakra. Mineralizacija ima epigenetski karakter i nalazi se u ...srednjotrijaskim karbonatima. Ova mineralizacija najvjerovatnije pripada Mississippi Valley tipu Pb-Zn ležišta.
Mineral and ore occurences at Mt. Ivanscica are situated in Middle Triassic carbonate rocks and are of epigenetic origin. These occurences are characterised by simple paragenesis of primary sulphides ...of lead and zinc and traces of sulphides of iron and copper. This mineralization is similar to Mississippi Valley Pb-Zn deposits. PUBLICATION ABSTRACT
The Darnó Unit within the Zagorje-Mid-Transdanubian Megaunit is an allochtonous part of Dinarides in NE-Hungary and represents a relict of the Neotethyan accretionary complex. It contains blocks of ...submarine basalts of Triassic age in turbiditic sediments olistrostrome) of Jurassic age. The lava clogged in the lime mud at the original site of volcanism and developed closely packed pillow, pillow fragment hyaloclastite breccia, and peperite facies. Interactionbetween the lava and the sea water produced mostly chloritic alteration of basalt and precipitation of hydrothermal calcite in amygdales, feeding channels of lava lobes and hyaloclastite breccia cements. Calcite is associated with chlorite, epidote, hematite and pyrite. Fluid inclusions in calcite infi llings record conditions of fluid/rock interaction. Salinities of fl uid inclusions (3.2–5.6 wt.% NaCl equiv. wt.%.) are close to the salinity of recent sea water and their homogenization temperatures are in the range of 80–150°C. Fluid inclusion data support interpretation that volcanic facies represent rapidly cooled distal zones away from the submarine volcanic centre. This is also confi rmed by the comparison to the volcanic and hydrothermal alteration facies of the submarine basalt lava-flow complex and associated pillow lava formation of Triassic age in the Hruškovec quarry in the Kalnik Mts., NW-Croatia. The obtained data contribute to understanding of the early history of Neotethyan evolution, i.e. dilemma about rifting or oceanization in Triassic time and offer new aspects of correlation between units of Dinaridic origin which had been displaced from their original setting by large scale Tertiary tectonic processes.
In recent years Zagreb city encounters severe pollution problems in aquatic, terrrestrial and atmospheric environment. A random or permanent monitoring of some inorganic gaseous pollutants in ...atmosphere has already been organized and published alsewhere. By means of a sophisticated mercury vapor analyser with a Zeeman effect background corrector, however, continuous registration along two traverses (monitoring routes) over rural, urban and industrial parts of Zagreb has been elaborated for the first time. Data show strong anthropogenic influence in the Zitnjak industrial area. The anomaly high 105 ngm Hg, on the 21 October moved slightly to downtown by change of wind direction on the 31 October. Intensity raised as much as 155 ngm Hg, 15 times augmented in comparison to a background value on the Medvednica mountain. Explanation should be sought in denser public traffic, change of wind direction and lowering of atmospheric pressure. PUBLICATION ABSTRACT
In order to find out a secundary dispersion halo of mercury and some other trace elements around the bauxite ore bodies, the authors sampled terra rossa along traverses over them. At the same time, ...mercury in air is measured and expressed by relative values (mA) using Zeeman mercury vapor analyser. Mercury in soil was determined by flameless atomic absortion method and Cd, Pb, Zn, Cu, Co and Mn by standard AA techniques. The results are equivocal since the natural vertical soil profiles are severely disturbed on traverses due to different land use, what should be taken into consideration during continuation of the survey. PUBLICATION ABSTRACT
Posljednjih godina grad Zagreb se susreće sa značajnim ekološkim problemima zagađenja svih medija; vode, zraka i tla. Povremena i stalna praćenja koncentracije određenih anorganskih zagađivača u ...atmosferi izvode se već duže vrijeme, a rezultati su publicirani u znanstvenim časopisima. Međutim, prvi put u našem gradu je korišten model suvremenog živinog analizatora s korektorom analitičkih šumova, baziranom na Zeemanovon efektu, koji omogućava kontinuirano registriranje vrijednosti koncentracija žive u zraku. Mjerenja su izvedena uzduž dviju trasa koje prolaze kroz ruralne, urbane i industrijske predjele grada Zagreba, Rezultati mjerenja su omogućili izradu grube geokemij-ske karte distribucije žive i lokaciju anomalnih koncentracija u najugroženijim područjima. Anomalija od 105 ngm Hg, registrirana 21. listopada (subota), vidljivo se pomakla u smjeru prema centru grada 31. listopada (utorak). Njezin intenzitet je porastao na 155 ngm Hg, 15 puta više od prosječnih vrijednosti na Medvednici, a položaj ukazuje na značajan antropogeni utjecaj u području industrijske zone Žitnjaka. Objašnjenje ove pojave treba tražiti u pojačanom utjecaju gradskog prometa, promjeni smjera vjetra i sniženju atmosferskog pritiska kao predznaka pogoršanja vremenskih uvjeta.
U radu je obrađeno istraživanje sekundarne disperzije žive i nekih drugih elemenata oko boksitnih rudnih tijela u Istri. U tu svrhu izvršeno je uzorkovanje terra rosse uzduž traversi položenih preko ...boksitnih rudnih tijela. Istovremeno s uzorkovanjem tla vršena su mjerenja pomoću Zeemanovog analizatora živinih para u zraku, a vrijednosti su izražavane u relativnim vrijednostima (mA). Živa u tlu je određivana pomoću metode besplamene atomske apsorpcije, a Cd, Pb, Zn, Cu, Co i Mn standardnom atomskom apsorpcijom. Rezultati ne pokazuju jednoznačnost na terenima s različitim stupnjem poremećenja prirodnog, vertikalnog profila tla (oranica, livada i Suma), što se mora uzeti u obzir prilikom nastavka istraživanja.
