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The Nowdan anticline of the Zagros orogen as a geoheritage ‘window’ into the late Mesozoic-Cenozoic evolution of the African-Arabian continental margin

Habibi Tahereh, Ruban Dmitry A., Yashalova Natalia N.

Geologos

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2020

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Vol. 26, No. 1

65--73

EN

Geological heritage can contribute to our understanding of the long-term evolution of important sectors of our planet. Cretaceous–Neogene rocks (chiefly carbonates) crop out in the Nowdan anticline of the Zagros orogen. Field investigations have permitted the establishment of 10 key localities (stratigraphical reference sections) that represent these rocks within this anticline, which is a single large geosite. The formations are related to the main phases in the evolution of the northeastern sector of the African–Arabian continental margin. For instance, carbonate rocks of the Asmari Formation mark changes in the affinity of the study area, from the African–Arabian plate to only the Arabian plate, separated in conjunction with Red Sea rifting during the Oligocene. Information on the palaeogeographical changes is really precious to geoscientists and geotourists alike, and contributes to the great value of the Nowdan anticline geosite. Evidence from the latter, as well as from a few other places (i.e., the Mountainous Adygeya geodiversity hotspot in Russia, the North Coast of São Paulo in Brazil and the possible Gondwanan geopark in Namibia) illustrates the necessity of distinguishing a palaeomapping subtype in palaeogeographical characterisation of geological heritage.

2

Study of secondary pressure influence on the mining excavation applying elastic-plastic behaviour of rocks

Lungu S., Zbiciak A., Michalczyk R.

Logistyka

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2014

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nr 3

3889--3893

EN

In the scientific literature and designing practice of supported mining pillars lots of methods are presented. Mining pillars are part of the rock being left in excavation in order to support the floor. In this article, in order to design supported mining pillars, we are using the Mohr-Coulomb yield criterion. The fundamental idea of the paper was to investigate how the top support in mining excavation influences on the state of mining pillar using different underground mining schemes. Supported mining pillars should be calculated applying the hypothesis of non-homogenous stress distribution and the parabolic mining pressure which is concentrated at the top of mining excavation. In order to carry out the certain example we used real data from work reports concerning the deposit “Chisinau I”, being located in Republic of Moldova. The model we proposed was calculated with use of the FEM software ABAQUS ver. 6.12.

PL

W literaturze naukowej oraz w podręcznikach projektowania opisano wiele metod wymiarowania filarów górniczych, które stanowią część górotworu pozostawioną w wyrobisku do podparcia stropu. W niniejszym artykule, w celu zaprojektowania przykładowego filara górniczego, zastosowano sprężysto-plastyczny model konstytutywny z kryterium uplastycznienia Coulomba-Mohra. Podstawowym zadaniem podjętym w pracy było zbadanie wpływu podparcia górnej części wyrobiska górniczego na stan filara przy zastosowaniu różnych schematów obliczeniowych. Filar górniczy zaprojektowano przyjmując hipotezę niejednorodnego rozkładu naprężeń oraz paraboliczny rozkład ciśnienia, który jest skoncentrowany w górnej części wyrobiska. W celu przeprowadzenia przykładowych obliczeń wykorzystano dane z raportów dotyczących złoża „Kiszyniów I”, zlokalizowanego w Republice Mołdowy. Zaproponowany model obliczeniowy rozwiązano z wykorzystaniem oprogramowania metody elementów skończonych ABAQUS ver. 6.12.

3

Structure orientation analysis of Nove spojeni Tunnel (Vitkov hill, Barrandian, Czech Republic)

Lakotova K, Knizek M, Kossler M

Geologia Sudetica

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2014

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Vol. 42

52--52

4

Mapping with VLF tool - gold investigation case study that yielded unexpected structural minutiae

Ostrowski S.

Geologia Sudetica

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2014

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Vol. 42

68--68

5

Interaction of eclogite with felsic granulite in the orogenic root, Bohemian Massif

Stipska P, Powell R, Racek M, Lexa O

Geologia Sudetica

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2014

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Vol. 42

93--93

6

Uwagi o wpływie struktury przedpola na formowanie się frontu nasunięć płaszczowinowych

Stupka O., Mizerski W.

Przegląd Geologiczny

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2007

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Vol. 55, nr 5

430-434

EN

. In this paper we describe relations between geological structure, shape and relief of the crystalline basement of the Precambrian cratons, and between rigid elements in Variscan orogens and the width of the younger fold belts in their foreland. The relations can be seen between the Baltic shield and Alpine belts. In places, where the fold belt is thrust over uplifted part of the craton's fundament, the fold belt and its marginal foredeep are tight and the fold belt is very high. In places, where the fold belt is thrust over deep part of the fundament, the fold belt and its marginal foredeep are broad. Similar relations can be seen between the East European craton and Variscan fold belts.

7

Geodynamic evolution of the o rogen: the West Carpathian and Ouachitas case study

Golonka J., Ślączka A., Picha F.

Annales Societatis Geologorum Poloniae

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2003

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Vol. 73, No 3

145-167

EN

Twelve time interval maps have been presented which depict the plate tectonic configuration, paleogeography and lithofacies for the circum-arpathian area from the Late Carboniferous through Neogene and for the circum-Ouachita region from Late Cambrian through Early Permian. The following geodynamic evolutionary stages can be distinguished in these two orogens: Stage I - rifting of terranes off the major continent, forming oceanic basins (Triassic-Early Cretaceous in the Carpathian region, Cambrian-Devonian in the Ouachita region); Stage II - formation of subduction zones along the active margin, partial closing of oceanic basin, development of deep-water flysch basin associate with this rifting on the platform (passive margin) with the attenuated continental crust (Late Cretaceous-Paleocene in the Carpathian region, Early Carboniferous in the Ouachitas); Stage III - collision, perhaps terrane-continent, with the accompanying conver- gence of two large continents, development of accretionary prisms, Eocene-Early Miocene time in the Carpathian region, Late Carboniferous in the Ouachitas; and Stage IV - postcollisional, (Miocene-Present-future? in the Carpathians, Permian-Triassic in the Ouachitas). Both, Carpathians and Ouachitas are accretionary prisms formed in response to terrane-continent and continent-continent collision. The paleogeographic approach we have taken shows how these mountain belts were constructed through the orogenic cycle, which reflects complex plate tectonic processes. Carpathians and Ouachitas record complete and homologous Wilson cycle.

8

Zastosowanie otworowych profilowań geofizycznych do badania stanu górotworu w rejonie Szopienic

Bała M., Jarzyna J., Zorski T., Radomiński J., Pałka K., Krzeszowiec M.

Prace Instytutu Górnictwa Naftowego i Gazownictwa

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2000

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nr 110 wyd. konferencyjne

293--297

EN

Comprehensive measurements and interpretation of well logs were done in several shallow, low diameter wells near Katowice Szopienice railway, in region of old mining excavation. Quantitative interpretation of well logs delivered detailed information about lithology, bulk density and porosity, which was a complementary data to results of surface geophysical measurements. Preceded by borehole camera investigations the following well logs were done in boreholes depending on their technical conditions: spectrometry of gamma ray, spectrometry of gamma-gamma log, standard gamma-gamma log, caliper and acoustic full wavetrain recording. Parts of rock formation of high porosity and low bulk density were showed as zones of low elastic parameters, in which risk of ground collapse increase.