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Sedimentološka in paleontološka analiza zgornjeladinijskega - spodnjekarnijskega masivnega apnenca s Storžiča : diplomsko delo
ID Dvoršak, Aljaž (Author), ID Gale, Luka (Mentor) More about this mentor... This link opens in a new window

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Abstract
Na meji med permom in triasom je prišlo do velikega izumrtja, ki je močno prizadelo življenje na Zemlji. Poleg tega pa je imelo tudi velik vpliv na razširjenost in sestavo grebenskih skupnosti. V obdobju poznega ladinija in zgodnjega karnija so grebeni postali pogosta značilnost karbonatnih platform nizkih zemljepisnih širin. V diplomski nalogi opisujem sestavo in taksone zgornjeladinijskega – spodnjekarnijskega masivnega grebenskega apnenca s Storžiča, ki se nahaja v Kamniško-Savinjskih Alpah. Poleg tega za primerjavo opisujem tudi fosilne združbe iz drugih lokacij po Sloveniji in svetu. Kamniško-Savinjske Alpe, kamor spada Storžič, ležijo na severu Slovenije in so sestavljene predvsem iz triasnih plitvovodnih karbonatnih kamnin. Geotektonsko spadajo v Južne Alpe, za katere so značilne mezozojske kamnine, ki so nastale na Julijski karbonatni platformi in v Slovenskem bazenu. Triasne kamnine so se razvijale pod vplivom ekstenzijske tektonike. Vzdolž planinske poti na Storžič je bilo pobranih 17 vzorcev, iz katerih so bili narejeni zbruski. Prepoznanih je bilo sedem različnih mikrofaciesov. Ločimo jih lahko po vsebnosti različnih taksonov ter njihovi strukturi. Glavni taksoni, ki so bili določeni v vzorcih in definirajo mikrofaciese so Baccanella floriformis, Uvanella, Ladinella porata, korale, solenoporaceje, talamidne spužve, sfinktozoji ter inozoji. Grebenski apnenec je bil v preteklosti raziskan na večih lokacijah po Sloveniji. Ponekod so bili najdeni isti taksoni kot na Storžiču, drugod popolnoma drugačni. Apnenec s Storžiča primerjam z apnenci s Pece, Lesnega Brda, Julijskih Alp, Menine planine in Dol pri Litiji. Opisanih je tudi nekaj ostalih grebenskih združb po svetu, na primer združba iz Dolomitov, kitajske platforme Yang-tze, Wettersteinske formacije, San Cassiano formacije in združba japonskega otoka Shikoku.

Language:Slovenian
Keywords:trias, masivni apnenec, grebeni, spužve, korale, mikroproblematika
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:NTF - Faculty of Natural Sciences and Engineering
Place of publishing:Ljubljana
Publisher:A. Dvoršak
Year:2023
Number of pages:IX, 47 str.
PID:20.500.12556/RUL-148260 This link opens in a new window
UDC:55
COBISS.SI-ID:160994819 This link opens in a new window
Publication date in RUL:08.08.2023
Views:577
Downloads:19
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Secondary language

Language:English
Title:Sedimentological and paleontological analysis of upper Ladinian - lower Carnian massive limestone of Mt. Storžič : diploma work
Abstract:
At the break of an era, from the Permian into the Triassic period, a major extinction event, “The Great Dying” took place, severely affecting all life on Earth. Furthermore, it significantly affected the extent and composition of reef communities. During the late Ladinian and early Carnian reefs became a common characteristic of low latitude carbonate platforms. In this thesis, I describe the composition and taxa in upper Ladinian – lower Carnian reef limestone from Storžič, which is situated in the Kamnik-Savinja Alps. Additionally, I describe fossil groups from other locations in Slovenia and the world. The Kamnik-Savinja Alps, part of which is Storžič, lay to the north of Slovenia and are composed mostly of Triassic shallow water carbonate rock, which was formed on the Julian Carbonate Platform in the Slovenian Basin. The Triassic rock was formed under the influence of extensional tectonics. 17 samples were collected along a Storžič alpine trail, from which thin sections for analysis were made. Seven different microfacies were identified. They can be discriminated by the content of different taxa and structures. The main taxa identified in the samples were Baccanella floriformis, Uvanella, Ladinella porata, Solenoporaceae, corals, thalamid sponges, sphinctozoa and inozoa. Among the microfacies, boundstones, which differ in their taxa compositions, were the most abundant. Only two microfacies are homogenous, however, all are poorly sorted. Druzy mosaic cements were the most common. Reef limestone was researched at multiple sites all over Slovenia. Some locations showed identical taxa, while others showed nothing similar. The limestone from Storžič was compared with limestone from Peca, Lesno Brdo, the Julian Alps, Menina Planina, and Dole pri Litiji. Additionally, contemporary reef communities from other locations are described, ex.: a group from The Dolomites, Chinese Yangtze Platform, Wetterstein Formation, San Cassiano Formation, and the Japanese island of Shikoku.

Keywords:Triassic, massive limestone, reefs, sponge, corals, microproblematica

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