Geochemistry of Sediments from the Lopare Basin(Bosnia and Herzegovina):Implications for Paleoclimate,Paleosalinity,Paleoredox and Provenance  

作　　者：AleksandraŠAJNOVIĆ Nenad GRBA Franz NEUBAUER Milica KAŠANIN-GRUBIN Ksenija STOJANOVIĆ Nenad PETKOVIĆ Branimir JOVANČIĆEVIĆ 

机构地区：[1]University of Belgrade,Center of Chemistry,ICTM,Studentski trg 12-16,11000 Belgrade,Serbia [2]University of Novi Sad,Faculty of Sciences,Department of Chemistry,Biochemistry and Environmental Protection,Trg Dositeja Obradovica 3,21000 Novi Sad,Serbia [3]Paris Lodron University of Salzburg,Department of Geography and Geology,Hellbrunnerstrasse 34,5020 Salzburg,Austria [4]University of Belgrade,Faculty of Chemistry,Studentski trg 12-16,11000 Belgrade,Serbia [5]Rio Tinto–Rio Sava Exploration,Takovska 45,11000 Belgrade,Serbia

出　　处：《Acta Geologica Sinica(English Edition)》2020年第5期1591-1618,共28页地质学报（英文版）

基　　金：partly financed by the Ministry of Education,Science and Technological Development,Republic of Serbia(Grant No.451-03-68/2020-14/200026 and Project 176006)。

摘　　要：A combined inorganic and organic geochemical study was carried out on marls and mudstones collected from the Lower Miocene Lopare Basin,Bosnia and Herzegovina.A total of 46 samples collected from two boreholes,Pot 1(depth of 193 m)and Pot 3(depth of 344 m),showed that element abundances like boron(B),lithium(Li),strontium(Sr),uranium(U),chromium(Cr),nickel(Ni),magnesium(Mg),sodium(Na)and calcium(Ca)are much higher than average than in the upper continental crust(UCC).Chemical composition indicates at least two sources:(i)Mesozoic ophiolites occurring in the north of the investigated area,and(ii)dacito-andesitic pyroclastics(Mesozoic to Cenozoic).Lopare Basin sedimentation was influenced by strong evaporation resulting in a partly hypersaline lake,which formed during a warm climatic period,probably during the Miocene Climatic Optimum.A brief episode of humid climate conditions resulted in the basin fillingup and deposition of felsic sediments enriched in thorium(Th).Organic geochemistry shows that the majority of studied sediments contains predominantly immature to marginally mature algal organic matter(OM).The biomarker patterns are generally in agreement with the geological history of the Lopare Basin and inorganic and mineralogical data.Conversely,the molecular distribution of n-alkanes as reliable climatic andδ-MTTC as paleosalinity indicators do not support this conclusion.

关 键 词：GEOCHEMISTRY provenance analysis paleoenvironmental conditions salinity/hypersalinity biomarker Lopare Basin Bosnia and Herzegovina 

分 类 号：P512.2[天文地球—地质学] P59