SVIBOR - Project code: 1-09-016

MINISTRY OF SCIENCE AND TECHNOLOGY

Strossmayerov trg 4, HR - 10000 ZAGREB
tel.: +385 1 459 44 44, fax: +385 1 459 44 69
E-mail: ured@znanost.hr

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Project code: 1-09-016


MINERALOGY OF Ba-SILICATES, ZEOLITES AND Tl-SULFOSALTS ASSOCIATIONS


Main researcher: ŠĆAVNIČAR, STJEPAN (46231)



Assistants
Type of research: basic
Duration from: 01/01/91. to 12/31/95.

Papers on project (total): 31
Papers on project quoted in Current Contents: 10
Institution name: Prirodoslovno-matematički fakultet, Prirodoslovni odjeli, Zagreb (119)
Department/Institute: Department of mineralogy and petrology
Address: Demetrova 1
City: 10000 - Zagreb, Croatia
Communication
Phone: 385 (0)1 42 86 10
Phone: 385 (0)1 42 21 36
Fax: 385 (0)1 42 21 36
E-mail: vberman@public.srce.hr

Summary: We intended to investigate few different mineral assemblages by using modern mineralogical methods, among which we emphasize: Two mineral assemblages having barium silicates, namely the hydrothermal occurrence near Busovača (Bosnia) and metamorphic occurrence near Nežilovo (Macedonia); both by their composition represent a world rarity. A wide area (vicinity of Macelj) in Hrvatsko Zagorje with tuffs, tuffites and effusives where zeolites and other alteration products are the subject of our interest. Hydrothermal deposit in Alšar (Macedonia) which contains thallium sulphosalts together with some other sulfides and oxysalts as potential bearers of thallium.

Keywords: cymrite, hialophane, tilasite, hedyphane, ardenite, nežilovite, zeolites, clays, Tl-sulfosalts, Tl-oxysalts - morphology, crystallochemistry, optics, genesis.

Research goals: The main goal of investigation of entire mineralization associated with Ba anomaly near Busovača and Nežilovo, is to collect the knowledge which could be the fundamental worldwide contribution to mineralogy of investigated species. A study of zeolites and phyllosilicates originated from pyroclastites and mixed sediments should solve problems of identification of certain mineral species, their genesis and usefulness of these rocks. The goal of investigation of Tl-sulphosalts and entire association from Alšar is mineralogy, minerogenesis and chrystallochemistry of found species. These topics belong to three different entirety. Samples from world recognized hydrothermal deposits of hialophane near Busovača in Bosnia and barium mineralization in metamorphites near Nežilovo in Macedonia (both inaccessible since 1991 because of war activities) contain amineral abundance, with rare minerals as cymrite, hialophane,barium mica, tilasite, ardenite, hedyphane, nežilovite which seek for detailed and complex mineralogical investigation in order to establish their chemical, morphological, structural and genetic characteristics as well as, their variability with respect to changing of conditions during crystallization. A study of zeolites of the wider area of Macelj aims to establish their chrystalochemical nature and physical propeties, and solve a numerous open questions in zeolites systematics, conditions of origin and stability of zeolites and accompanied secondary minerals. Alšar deposit gives us the opportunity to study, among others, Tl-sulphosalts, which have been discovered in a very few localities worldwide, and which are only recently subjected to thorough scientific interest. Furthermore, our department was alsoinvolved in the project P-136 "The use of thallium minerals as the Sun originated neutrino detectors".


COOPERATION - INSTITUTIONS


  1. Name of institution: Laboratorium fur chemische und mineralogische Kristallographie, Universitat Bern
    Type of institution: University/Faculty
    Type of cooperation: Joint publishing of scientific papers
    City: 3012 - Bern, Switzerland

  2. Name of institution: Institut fur Mineralogie und Kristallographie der Universitat Wien
    Type of institution: University/Faculty
    Type of cooperation: Joint publishing of scientific papers
    City: 1010 - Wien, Austria

  3. Name of institution: Dipartimento di Mineralogia e Petrologia, Universita di Padova
    Type of institution: University/Faculty
    Type of cooperation: Joint publishing of scientific papers
    City: 35122 - Padova, Italy

  4. Name of institution: Royal Ontario Museum
    Type of institution: State institute
    Type of cooperation: Joint publishing of scientific papers
    City: Toronto, Canada

  5. Name of institution: Institut fur Geowissenschaften
    Type of institution: State institute
    Type of cooperation: Joint publishing of scientific papers
    City: Potsdam, Njemačka

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Last update: 10/10/95
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