The drift history of Iran from the Ordovician to the Triassic

Abstract

New Late Ordovician and Triassic palaeomagnetic data from Iran are presented. These data, in conjunction with data from the literature, provide insights on the drift history of Iran as part of Cimmeria during the Ordovician–Triassic. A robust agreement of palaeomagnetic poles of Iran and West Gondwana is observed for the Late Ordovician–earliest Carboniferous, indicating that Iran was part of Gondwana during that time. Data for the Late Permian–early Early Triassic indicate that Iran resided on subequatorial palaeolatitudes, clearly disengaged from the parental Gondwanan margin in the southern hemisphere. Since the late Early Triassic, Iran has been located in the northern hemisphere close to the Eurasian margin. This northward drift brought Iran to cover much of the Palaeotethys in approximately 35 Ma, at an average plate speed of c. 7–8 cm year−1, and was in part coeval to the transformation of Pangaea from an Irvingian B to a Wegenerian A-type configuration.

The latest Permian mass extinction in the Alborz Mountains (North Iran)

“…This process of accretion resulted in one of the most conspicuous mountain chains of the Phanerozoic, the Cimmerian Orogen (Sengor 1979), recorded at the core of the Alborz Mountains in North Iran, along the southern coast of the Caspian Sea (Figure 1). During the Late Permian, North Iran, as part of the Cimmerian blocks was located in the equatorial humid belt (Muttoni et al 2009) and most of it emerged at this time.…”

The Carbonate Platform Model and Reservoirs’ Origins of the Callovian-Oxfordian Stage in the Amu Darya Basin, Turkmenistan

“…In Late Permian-Triassic (possibly Late Triassic/Early Jurassic [56]) the Iranian Block collided with the southern margin of Eurasia, and the Paleotethys Ocean was closed [29,57,58]. A series of structural faults formed in the collision event separate the basement of the basin into numerous paleo-uplifts and graben structures [59][60][61][62].…”

Estimation of Species Richness of Permian Foraminifera in Non-Parametric Methods and Investigation of Its Change Trend in Central Alborz, Western Tethys

“…The first one is the type section of the Dorud Formation [14], located at north of the Dorud village. It lies north of Tehran (Figure 1(c)) with the geographic coordinates: 36˚00 '18. [19]. (b) Main tectono-stratigraphic units of Iran, adapted from [14].…”

“…According to [19] [19] shows that the Iranian plate were situated around 20˚S with a North-South trend in the Early Permian. During opening the Neo-Tethys and simultaneous Palaeo-Tethys subduction, it started to move to north rotating counter clockwise at the same time.…”