Geochemistry of hydrothermally altered rocks in Klisura occurrence, Sofia district

Pages: 
pp. 89-92
Geological institute, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
Abstract: 

Klisoura occurence is located close to Klisoura Village, about 6 km west of the town of Bankya. Host rocks are Upper Cretaceous andesite pyroclastics, some andesite bodies and veins that form the core of Radui anticline – part of Viskyar-Vitosha synclinorium. The hydrothermallly altered rocks cover an area of about 2 km2 and are exposed around the intersection center of several fault systems. Кунов et al. (2000) described the occurence as epithermal, of acid-sulfate type. 
   The main aim of the present study is to trace the behaviour of rare elements in the process of advanced argillic alteration that lead to the formation of secondary quartzites in the occurrence. The conclusion are based on the distribution of rare elements in different alteration types – from less to more intensively altered varieties. Here, the term "zone" is used as a synonim of "hydrothermally altered rock type" since the latter forms the zones of hydrothermal alterations.
   Samples from all alteration types were collected during the field studies. Materails from drillhole No3 (drilled in 1974) were also analyzed. The main components and 18 rare elements were analyzed by X-ray fluorescence and atomic absorption.

VOLUME 32 (2-4)/December 2002 110th Anniversary of Acad. Prof. Strashimir Dimitrov; XVII Congress of the Carpathian-Balkan Geological Association

Geologica Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev St., bl. 24, 1113 Sofia, Bulgaria

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24
|
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24
|
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24
|
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24
|
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24
|
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24
|
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Akad. G. Bonchev Str., block 24

Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev str. Bl. 24

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
|
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
|
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia

Geological Institute, Bulgarian Academy of Sciences,Sofia 1113, Bulgaria, Acad. G. Bonchev str, bl. 24
|
Geological Institute, Bulgarian Academy of Sciences,Sofia 1113, Bulgaria, Acad. G. Bonchev str, bl. 24
|
Earth Science Section of the Uviversity of Geneva, 13, rue des Maraîchers, 1211 Geneva 4, Switzerland
|
Earth Science Section of the Uviversity of Geneva, 13, rue des Maraîchers, 1211 Geneva 4, Switzerland

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
|
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria

Geological Institute BAS, Acad. G. Bonchev Str., Bl. 24 1113 Sofia, Bulgaria

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
|
Sofia University "Sv. Kliment Ohridski", 1504 Sofia, Bulgaria

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
|
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
|
Sofia University "Sv. Kliment Ohridski", Tsar Osvobodilel Blvd, 15, 1000 Sofia
|
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia

Geological institute, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
|
Geological institute, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
|
Geological institute, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
|
University of Mining and Geology "Sv. Ivan Rilski", 1700, Sofia

Geological institute, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
|
Institute of Geochemistry, Siberian branch of the Russian Academy of Sciences, P.O.B. 4019, 664033 Irkutsk
|
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
|
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia

Geological Institute, Bulgarian Academy of Sciences, Sofia, 1113
|
Geological Institute, Bulgarian Academy of Sciences, Sofia, 1113
|
Geological Institute, Bulgarian Academy of Sciences, Sofia, 1113
|
Geological Institute, Bulgarian Academy of Sciences, Sofia, 1113
|
Geological Institute, Bulgarian Academy of Sciences, Sofia, 1113
|
Geological Institute, Bulgarian Academy of Sciences, Sofia, 1113

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia

Geological Institute, Bulgarian Academy of Sciences, Sofia, 1113

Geological Institute, Bulgarian Academy of Sciences

Geological Institute, BAS, Acad. G. Bonchev Street Bl. 24, 1113 Sofia, Bulgaria

Geological Institute of BAS, 24 Acad. G. Bonchev Sir., BG - 1113 Sofia
|
Geological Institute of BAS, 24 Acad. G. Bonchev Sir., BG - 1113 Sofia
|
Geological Institute of BAS, 24 Acad. G. Bonchev Sir., BG - 1113 Sofia

Geological Institute at the Bulgarian Academy of Sciences, Acad. G. Bonchev Str., 1113 Sofia, Bulgaria
|
Geological Institute at the Bulgarian Academy of Sciences, Acad. G. Bonchev Str., 1113 Sofia, Bulgaria
|
Geological Institute at the Bulgarian Academy of Sciences, Acad. G. Bonchev Str., 1113 Sofia, Bulgaria

University of Mining and Geology, Studentski grad, Sofia, 1100, Bulgaria
|
Geological Institute of Romania, Caransebes Str. No 1, Bucharest, RO-78344, Romania
|
University of Belgrade, Dusina 7, Belgrad, 11000, Yugoslavia
|
Geological Institute of Romania, Caransebes Str. No 1, Bucharest, RO-78344, Romania

Geological Institute at Bulgarian Academy of Sciences, Sofia 1113

Sofia University "Sv. Kl. Ohridski", Department of Geology and Palaeontology, 1504 Sofia