نتایج جستجو برای: neotethys

تعداد نتایج: 121  

2002
THEO ANDREW ALASTAIR H. F ROBERTSON

The Beyşehir–Hoyran–Hadim Nappes crop out over 700 km from NW to SE. Above a regionally autochthonous Tauride carbonate platform the Beyşehir–Hoyran Nappes begin with a thrust sheet (c. 400 m) of mainly redeposited carbonates, quartzose sandstones and mudstones of Mid–Late Triassic age, interpreted as a proximal slope–base-of-slope succession. Above is a thrust sheet (c. 1 km) of Middle–Upper T...

2015
Marco Maffione Cedric Thieulot Douwe J. J. van Hinsbergen Antony Morris Wim Spakman

Subduction initiation is a critical link in the plate tectonic cycle. Intraoceanic subduction zones can form along transform faults and fracture zones, but how subduction nucleates parallel to mid-ocean ridges, as in e.g., the Neotethys Ocean during the Jurassic, remains a matter of debate. In recent years, extensional detachment faults have been widely documented adjacent to slow-spreading and...

Journal: :Geological Society of America Bulletin 2022

How the Neotethyan Ocean evolved and extended southwards into Southeast Asia remains controversial. The paleographical correlation between India SE Asian blocks and/or terranes before opening of Neotethys initial time is still unknown. lack this knowledge hampers our further understanding tectonic evolution global Neotethys. Here we present a combined study on Triassic magmatism in Tengchong Bl...

Journal: :Frontiers in Earth Science 2021

In northwestern Iran, magmatic activity occurred during three main intervals: The Cretaceous, Eocene, and Miocene-Quaternary. first two phases of are more consistent with arc-type magmatism on an active continental margin; whereas the last phase, which has calc-alkaline alkaline affinities, shows similarity to postcollisional magmatism. Magmatic belts mostly situated in northern eastern parts O...

Journal: :Geologia Croatica 2023

A chloritoid schist from the Medvednica Mts. (Croatia, Zagorje-Mid-Transdanubian zone) is part of metasedimentary succession a Palaeozoic-Mesozoic Metamorphic Complex. The studied samples show mineral association chloritoid, chlorite, quartz and white mica. P-T pseudosection, combined with modal chemical isopleths, classical thermobarometric calculations yield peak metamorphic conditions 0.8 – ...

Journal: :journal of sciences, islamic republic of iran 2003
m. arvin

the lower to middle miocene chenar granitoid stock, a part of central iranian volcanic belt, is intruded into eocene volcano-sedimentary complex in northwestern kerman in south central iran. the chenar granitoid stock consists mainly of coarse to medium grain granodiorite and monzogranite with subordinate tonalite and syenogranite. alkali granites as aplitic veins and quartz dioritic dykes freq...

اُبرهانسلی, اُبرهانسلی, عمرانی, هادی , مؤذن, محسن ,

HP/LT metabasite rocks can preserve some evidences of tectonic and geochemical processes of a subduction zone. Sabzevar Ophiolite and metabasites which are located at the north of Central Iranian Microcontinent Block (CIM) have preserved such evidences. The metabasites are fossil oceanic crust of Neotethys-related basin. Metabasites are composed of glaucophane schist, amphibolite and greenschis...

2015
Gabriella B. Kiss

Several Cyprus-type volcanogenic massive sulphide (VMS) deposits occur in the Jurassic ophiolitic series of the Northern Apennines. Stratabound, stratiform and stockwork deposits were formed in the western limb of the Neotethys (Ligurian Ocean) and are observed today in basalt, gabbro and serpentinised peridotite host rocks. The studied stockwork deposit at Boccassuolo occurs in basalt and basa...

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