Temat: Central Iran - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Provenance and tectonic setting of the Middle Eocene lower Akhoreh Formation, Nain area, Central Iran, assessed using petrography and geochemistry
Autorzy:: Salehi, Mohammad Ali
Mallah, Mohammed
Jafarzadeh, Mahdi
Tematy:: petrography
geochemistry
palaeogeography
Nain Ophiolite
Akhoreh Formation
Central Iran; Pokaż więcej
Data publikacji:: 2023
Powiązania:: https://bibliotekanauki.pl/articles/27324243.pdf Link otwiera się w nowym oknie
Źródło:: Geological Quarterly; 2023, 67, 2; art. no. 14
1641-7291
Pojawia się w:: Geological Quarterly
Opis:: The Middle Eocene Akhoreh Formation is superbly exposed in the western corner of the Central-East Iranian Microcontinent (CEIM). This formation covered the northeastern flank of the Cretaceous Nain Ophiolite Mélange (NOM) and is adjacent to the Paleogene Urmieh–Dokhtar Magmatic Arc (UDMA) formed in the southwest of the CEIM. This terrigenous succession is composed of a thin basal conglomerate followed by mostly pink to purple sandstones alternating with shales. The clast composition and clast imbrication of the conglomerates show local source areas towards the north-north-east. Modal components of lower Akhoreh Formation sandstones reveals immature lithic arkose (Q8F48L44) and feldspathic litharenite (Q8F44L48) sandstones that are rich in mafic and ultramafic igneous and volcanic rock fragments. Mafic to ultramafic source rocks are also indicated by geochemical data (enrichment of Mg, Cr and Ni and Cr/V) in the sandstone and shale samples analyzed. However, geochemical data suggests an intermediate igneous rock origin for the shale samples studied, most likely from the nearby continental arc. Based on petrographic data, these sandstones have characteristics of a transitional to undissected arc tectonic setting. Geochemical discrimination diagrams using major and trace elements indicate an oceanic island arc tectonic setting for the lower Akhoreh Formation sandstones and shales, probably due to a predominance of ophiolitic source rocks. Furthermore, the chemical index of alteration and modal analysis indicate a weak to moderate degree of chemical weathering with arid climatic conditions in the source area. The exhumed NOM, together with the UDMA in the southwest, were dominant sources of sediment to the lower Akhoreh Formation, that lay to the northeast in a local retroarc basin of the Central Iranian Microplate, during the Middle Eocene.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: A Bajocian (Middle Jurassic) marine gastropod assemblage from the Badamu Formation, Central Iran
Autorzy:: Ferraris, M.
Binazadeh, T.
Kaim, A.
Tematy:: gastropoda
Middle Jurassic
systematics
palaeobiogeography
Badamu Formation
Central Iran; Pokaż więcej
Data publikacji:: 2016
Powiązania:: https://bibliotekanauki.pl/articles/191652.pdf Link otwiera się w nowym oknie
Źródło:: Annales Societatis Geologorum Poloniae; 2016, 86, 3; 329-340
0208-9068
Pojawia się w:: Annales Societatis Geologorum Poloniae
Opis:: Nine species of gastropods are reported from the Bajocian (Middle Jurassic) part of the Badamu Formation of Central Iran. This is the first report of a gastropod assemblage of this age from the shelves of the Kimmerian Continent. Seven species belong to the Vetigastropoda and two to the Caenogastropoda. Two new species, the pleurotomariid Bathrotomaria iranica sp. nov. and the eucyclid Eucycloidea badamuensis sp. nov., are described. The remaining species are left in open nomenclature owing to poor preservation. The composition of the gastropod association is strongly reminiscent of other Tethyan gastropod faunas, in particular those from the southern shores of the Tethys (India and Arabia) and from southern Europe. This indicates a relatively uniform distribution of gastropod faunas along the Middle Jurassic shores of the western Tethys.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 3.

Tytuł:: Biostratigraphy, microfacies, and reservoir quality of the Oligocene Qom Formation (Kharzan Section, north-west of Ardestan, central Iran)
Autorzy:: Arani, Asma Aftabi
Ashouri, Ali Reza
Daneshian, Jahanbakhsh
Ghaderi, Abbas
Wood, David A.
Tematy:: Oligocene
benthic foraminifera
sedimentary environment
reservoir quality
Qom Formation
central Iran; Pokaż więcej
Data publikacji:: 2023
Powiązania:: https://bibliotekanauki.pl/articles/58907092.pdf Link otwiera się w nowym oknie
Źródło:: Geological Quarterly; 2023, 67, 3
1641-7291
Pojawia się w:: Geological Quarterly
Opis:: The central Iran Basin is a region with unique environmental characteristics in which the Late Paleogene–Early Neogene benthic foraminifera display distinctive distributions and abundances that can assist in identifying the intervals with the best reservoir potential. Lipidocyclinid and miogypsinid zonal marker taxa in this region can be correlated with those in the SBZ23 region (European Basin), indicating an Oligocene (Chattian) age. With sedimentation of continental strata of the Upper Red Formation following the marine succession of the Qom Formation, it seems that the last Tethyan marine transgression in the Ardestan region in central Iran occurred in the Oligocene, and the Tethyan seaway was permanently closed during the Miocene. Seven carbonate microfacies and marl or silty marl facies were identified in the study area based on field investigations, textural analysis and faunal assemblages. These microfacies were deposited on an open-shelf carbonate platform in lagoonal, patch-reef, and open-marine belts that effectively define both inner and middle-shelf environments. Micritization, cementation, mechanical and chemical compaction, dissolution and fracturing are the most important diagenetic processes controlling reservoir quality in the Qom Formation. The investigation of these processes in the facies of the Qom formation in the Kharzan section revealed that intervals associated with shallow lagoonal depositional environments display better reservoir quality than other formation intervals, due to dissolution and fracturing.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 4.

Tytuł:: Assessment of genetic diversity of barberry germplasm (Berberis spp.) in central regions of Iran by morphological markers
Autorzy:: Tatari, M.
Ghasemi, A.
Zeraatgar, H.
Tematy:: fruit tree
barberry
Berberis
medicinal plant
germplasm
selection
morphological marker
Central Iran; Pokaż więcej
Data publikacji:: 2019
Powiązania:: https://bibliotekanauki.pl/articles/2079.pdf Link otwiera się w nowym oknie
Źródło:: Journal of Horticultural Research; 2019, 27, 1
2300-5009
Pojawia się w:: Journal of Horticultural Research
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 5.

Tytuł:: Reconstruction of the depositional sedimentary environment of Oligocene deposits (Qom Formation) in the Qom Basin (northern Tethyan seaway), Iran
Autorzy:: Safari, Amrollah
Ghanbarloo, Hossein
Mansoury, Parisa
Esfahani, Mehran Mohammadian
Tematy:: Bijegan area
Naragh area
open shelf
central Iran
Tethyan Seaway
Bijegan
Naragh
centralny Iran
Tetyda; Pokaż więcej
Data publikacji:: 2020
Powiązania:: https://bibliotekanauki.pl/articles/950461.pdf Link otwiera się w nowym oknie
Źródło:: Geologos; 2020, 26, 2; 93-111
1426-8981
2080-6574
Pojawia się w:: Geologos
Opis:: During the Rupelian–Chattian, the Qom Basin (northern seaway basin) was located between the Paratethys in the north and the southern Tethyan seaway in the south. The Oligocene deposits (Qom Formation) in the Qom Basin have been interpreted for a reconstruction of environmental conditions during deposition, as well as of the influence of local fault activities and global sea level changes expressed within the basin. We have also investigated connections between the Qom Basin and adjacent basins. Seven microfacies types have been distinguished in the former. These microfacies formed within three major depositional environments, i.e., restricted lagoon, open lagoon and open marine. Strata of the Qom Formation are suggested to have been formed in an open-shelf system. In addition, the deepening and shallowing patterns noted within the microfacies suggest the presence of three third-order sequences in the Bijegan area and two third-order depositional sequences and an incomplete depositional sequence in the Naragh area. Our analysis suggests that, during the Rupelian and Chattian stages, the depositional sequences of the Qom Basin were influenced primarily by local tectonics, while global sea level changes had a greater impact on the southern Tethyan seaway and Paratethys basins. The depositional basins of the Tethyan seaway (southern Tethyan seaway, Paratethys Basin and Qom Basin) were probably related during the Burdigalian to Langhian and early Serravallian.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 6.

Tytuł:: Early Frasnian acanthodians from Central Iran
Autorzy:: Hairapetian, V.
Valiukevicius, J.
Burrow, C.J.
Tematy:: Acanthodii
Central Iran
Climatiidae
dental element
Diplacanthidae
Early Frasnian
Frasnian
Iran
Ischnacanthiformes
acanthodian
paleontology
histology
Devonian
systematics; Pokaż więcej
Data publikacji:: 2006
Powiązania:: https://bibliotekanauki.pl/articles/20209.pdf Link otwiera się w nowym oknie
Źródło:: Acta Palaeontologica Polonica; 2006, 51, 3
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Opis:: Two vertebrate−bearing horizons in the basal Frasnian carbonate of the Chahriseh section, northeast of Esfahan, yielded microremains of thelodonts, placoderms, acanthodians, actinopterygians, chondrichthyans, and sarcopterygians, considerably expanding the vertebrate faunal list for the strata. Acanthodians comprise a diverse association of climatiids, diplacanthids, and ischnacanthiforms, including the previously recorded climatiid Nostolepis sp. cf. N. gaujensis, as well as one new climatiid genus and several taxa left in open nomenclature. Climatiid Iranolepis ginteri gen. et sp. nov. is diagnosed by having scales with a highly raised medial crown area separated by steep slopes from lateral crown areas; an odontocytic mesodentine of maximum extent in the crown, distinguished by extensive network of fine canaliculi with abundant tiny osteocytes; and a poorly developed stranggewebe system. Other scales with fan−like symmetrically grooved crowns conform to the Diplacanthus−type histologically, and have many characters in common with Milesacanthus antarctica from the Aztec Siltstone of Antarctica. Osseous gnathal elements include mesodentinous tooth whorls from an ischnacanthiform or climatiid, and ischnacanthiform jaw bones with large chambers for vascular canals, distinctly separated cylindrical tooth cusps along the lingual ridge, and wide−based, triangular, weakly striated cusps on the main lateral ridge. The acanthodian association, accompanied by the Frasnian conodonts of the middle Mesotaxis falsiovalis to Palmatolepis hassi zones and zonal thelodonts Turinia hutkensis and Australolepis seddoni, is proving useful for biostratigraphy, showing similarities with assemblages from both Gondwana and the Old Red Sandstone Continent.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 7.

Tytuł:: Identification of the Oligocene-Miocene boundary in the Central Iran Basin (Qom Formation) : Calcareous nannofossil evidences
Autorzy:: Parandavar, Mohammad
Hadavi, Fatemeh
Tematy:: Oligocene-Miocene boundary
calcareous nannofossils
biohorizons
Central Iran Basin
Qom Formation
“c1” Sub-member; Pokaż więcej
Data publikacji:: 2019
Powiązania:: https://bibliotekanauki.pl/articles/2058670.pdf Link otwiera się w nowym oknie
Źródło:: Geological Quarterly; 2019, 63, 2; 215--229
1641-7291
Pojawia się w:: Geological Quarterly
Opis:: A diverse Late Oligocene to Early Miocene calcareous nannofossil assemblage was examined from the Qom Formation in the Central Iran Basin, and the Oligocene-Miocene boundary was identified based on the quantitative analysis of the assemblages in 303 smear slides. Eleven well-established calcareous nannofossil bio-events are delineated in the Upper Oligocene through Lower Miocene. The results clearly show that the Highest Occurrence (HO) of Sphenolithus delphix is the closest bio-event to the boundary as traditionally delineated on the lithostratigraphic criteria, and provides a distinct biohorizon below it. The Lowest Occurrence (LO) of the species Discoaster druggii is the oldest Miocene bio-event that is observed shortly after the HO of S. delphix, showing that calcareous nannofossils are well suited for approximating the Oligocene-Miocene boundary in the Qom Formation. The Oligocene-Miocene boundary is placed in the upper part of Sub-member “c1” in all three sections studied here and it is traceable throughout the Central Iran Basin, which makes a potentially reliable marker horizon for sequence stratigraphic and hydrocarbon studies in the area.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 8.

Tytuł:: Application of RQD-number and RQD-volume multifractal modelling to delineate rock mass characterisation in Kahang Cu-Mo porphyry deposit, central Iran
Zastosowanie metod modelowania numerycznego oraz modelowania fraktalnego do analizy jakości skał w celu określenia charakterystyki górotworu w obszarze złoża Cu-Mo w Kahang, środkowy Iran
Autorzy:: Yasrebi, A. B.
Wetherelt, A.
Foster, P. J.
Afzal, P.
Coggan, J.
Ahangaran, D. K.
Tematy:: określenie właściwości górotworu
modele fraktalne RQD-V i RQD-N
złoże porfiru Cu-MO w Kahang
porfirowy dioryt kwarcowy
środkowy Iran
RQD
porphyric quartz diorite
Central Iran; Pokaż więcej
Data publikacji:: 2013
Powiązania:: https://bibliotekanauki.pl/articles/218839.pdf Link otwiera się w nowym oknie
Źródło:: Archives of Mining Sciences; 2013, 58, 4; 1023-1035
0860-7001
Pojawia się w:: Archives of Mining Sciences
Opis:: Identification of rock mass properties in terms of Rock Quality Designation (RQD) plays a significant role in mine planning and design. This study aims to separate the rock mass characterisation based on RQD data analysed from 48 boreholes in Kahang Cu-Mo porphyry deposit situated in the central Iran utilising RQD-Volume (RQD-V) and RQD-Number (RQD-N) fractal models. The log-log plots for RQD-V and RQD-N models show four rock mass populations defined by RQD thresholds of 3.55, 25.12 and 89.12% and 10.47, 41.68 and 83.17% respectively which represent very poor, poor, good and excellent rocks based on Deere and Miller rock classification. The RQD-V and RQD-N models indicate that the excellent rocks are situated in the NW and central parts of this deposit however, the good rocks are located in the most parts of the deposit. The results of validation of the fractal models with the RQD block model show that the RQD-N fractal model of excellent rock quality is better than the RQD-V fractal model of the same rock quality. Correlation between results of the fractal and the geological models illustrates that the excellent rocks are associated with porphyric quartz diorite (PQD) units. The results reveal that there is a multifractal nature in rock characterisation with respect to RQD for the Kahang deposit. The proposed fractal model can be intended for the better understanding of the rock quality for purpose of determination of the final pit slope.
Identyfikacja właściwości górotworu odgrywa zasadniczą rolę w planowaniu wydobycia i projektowaniu kopalni. Praca niniejsza ma na celu określenie charakterystyki górotworu w oparciu o dane o jakości skał zebrane na podstawie próbek uzyskanych z 48 odwiertów wykonanych w złożu porfiru Cu-Mo w Kahang, zalegającym w środkowym Iranie przy użyciu modeli fraktalnych RQD-V - Rock Quality Determination-Volume [Określenie jakości skał-objętość]) i RQD-N (Rock Quality Determination-Number [Określenie jakości skał-liczba]). Wykresy logarytmiczne wykonane dla modeli RQD-V i RQD-N wykazują istnienie czterech populacji warstw górotworu, określonych na podstawie parametrów progowych: 3.55; 25.12; 89.12% oraz 10.47; 41.68 i 83.17%, odpowiadającym kolejno stopniom jakości: bardzo słaby, słaby, dobry i bardzo dobry, zgodnie z klasyfikacją skał Deere i Millera. Wyniki uzyskane przy zastosowaniu modeli RQD-V i RQD-N wskazują, że najlepsze skały zalegają w północno- zachodniej i centralnej części złoża, z kolei dobrej jakości skały znaleźć można w obrębie całego złoża. Walidacja modeli fraktalnych w oparciu o model blokowy (RQD block model) wskazuje, że model RQD-N dla bardzo dobrej jakości skał jest skuteczniejszy niż model RQD-V dla tej samej jakości skał. Wysoki stopień korelacji pomiędzy wynikami uzyskanymi w oparciu o modele fraktalne i geologiczne pokazuje, że najwyższej jakości skały związane są z obecnością porfirowego diorytu kwarcowego. Badanie wykazuje fraktalną naturę charakterystyki jakości skał w złożu Kahang. Zaproponowany model fraktalny wykorzystać można do lepszego poznania zagadnienia jakości skał w celu obliczenia nachylenia wyrobiska.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 9.

Tytuł:: Introduction to studies on late Sasanian protective armour. The Yarysh-Mardy helmet
Autorzy:: KUBIK, Adam
Tematy:: Helmets
Armour
Sasanian Iran
Caucasia
Central Asia
Nomads; Pokaż więcej
Data publikacji:: 2016
Powiązania:: https://bibliotekanauki.pl/articles/517615.pdf Link otwiera się w nowym oknie
Źródło:: Historia i Świat; 2016, 5; 77-105
2299-2464
Pojawia się w:: Historia i Świat
Opis:: The article discusses a helmet found in 1968 in a mountainous village of Yarysh-Mardy situated on the river Argun in the north-eastern Caucasus. The helmet was often associated with the Golden Horde period, which according to the author seems highly unlikely. On the basis of a detailed comparative analysis, the author puts forward a thesis of dating the object to either the late-Sasanid or early-Islamic period, i.e. to late 6th - beginning of 8th c. AD. Specifically, it is suggested that the appearance of the helmet in the Caucasus may be attributed to the time of Byzantine-Sasanid conflicts taking place at the turn of 6th and 7th c. AD. Additionally, the article argues that in the late Sasanid period a new sub-type of helmets came into existence, namely the ones with straight spangs and ones with spiky rivets. Furthermore, it is proposed that the Yarysh-Mardy helmet bears certain correspondences to similar finds from Groningen and Bremen.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 10.

Tytuł:: “Sham partnership” or “hidden competition”? The Russian Federation and the Islamic Republic of Iran in the Central Asian region
Autorzy:: Putkaradze, Kakha
Tematy:: Russia
Iran
Central Asia
partnership
national interests
regional cooperation; Pokaż więcej
Data publikacji:: 2020-06-30
Powiązania:: https://bibliotekanauki.pl/articles/1933266.pdf Link otwiera się w nowym oknie
Źródło:: Reality of Politics; 2020, 12; 99-113
2082-3959
Pojawia się w:: Reality of Politics
Opis:: Recent years the growing confrontation between the Russian Federation, the United States, and the EU is accompanied by Moscow’s searching the alternative allies for its diplomatic support. Iran is called one of such allies today. The Russian-Iranian relations are interesting both in terms of sectoral and geographical fields. The region of Central Asia is of particular importance. The need to consider such aspects is explained by the strengthening of Iran’s position in Central Asia as a direct zone of Russian interests in a sense of its economic, cultural, and religious presence.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Informacja

Wyszukujesz frazę "Central Iran" wg kryterium: Temat