The Experts below are selected from a list of 33714 Experts worldwide ranked by ideXlab platform

H U Huifen - One of the best experts on this subject based on the ideXlab platform.

Shengchen Tian - One of the best experts on this subject based on the ideXlab platform.

  • timing and forcing mechanism of the final neotethys seawater retreat from central iran in response to the arabia asia collision in the late early miocene
    Global and Planetary Change, 2020
    Co-Authors: Jimin Sun, Morteza Talebian, Chunsheng Jin, Weiguo Liu, Zhiliang Zhang, Mengmeng Cao, Brian F Windley, Morteza Sheykh, Reza Shahbazi, Shengchen Tian
    Abstract:

    Abstract The Iranian Plateau lies in the middle of the Neotethys tectonic domain; to the east it connects with the Tibetan Plateau, and to the west with the Anatolian Plateau and the Alpine orogenic belts. In the Cenozoic it underwent land/sea changes and tectonic uplift in response to the Arabia-Asia plate collision. One of the most prominent geological consequences of the collision was the disappearance of an epicontinental sea in Central Iran, which was a northeastern branch of the Neotethys seaway in the Oligocene-early Miocene. The timing of the final seawater retreat from Central Iran and its forcing mechanism are important for understanding the effects of Arabia-Asia plate collision as well as global eustatic sea-level changes. In this paper we present new magnetostratigraphy, U Pb ages of one tuffaceous bed, and stable isotopic records of carbonates. The results of this multidisciplinary study indicate that a shallow open sea in the Qom back-arc basin ended at 17 Ma, but the final seawater retreat from a restricted marine environment was at 16.8 Ma. The final regression was just before the Middle Miocene Optimum, implying that it was not related to a Climatic Factor, but driven by the Arabia-Asia plate collision. Moreover, the δ18O record of fine-grained lacustrine carbonates indicates an isotopic shift towards more positive isotopes after 13 Ma, suggesting an enhanced aridification in Central Iran. This Climatic deterioration was a response to reduced transport of moisture by westerlies from a retreating Neotethys Sea driven by a global eustatic sea-level drop in response to the East Antarctica ice-sheet expansion after the middle Miocene Optimum.

Jimin Sun - One of the best experts on this subject based on the ideXlab platform.

  • timing and forcing mechanism of the final neotethys seawater retreat from central iran in response to the arabia asia collision in the late early miocene
    Global and Planetary Change, 2020
    Co-Authors: Jimin Sun, Morteza Talebian, Chunsheng Jin, Weiguo Liu, Zhiliang Zhang, Mengmeng Cao, Brian F Windley, Morteza Sheykh, Reza Shahbazi, Shengchen Tian
    Abstract:

    Abstract The Iranian Plateau lies in the middle of the Neotethys tectonic domain; to the east it connects with the Tibetan Plateau, and to the west with the Anatolian Plateau and the Alpine orogenic belts. In the Cenozoic it underwent land/sea changes and tectonic uplift in response to the Arabia-Asia plate collision. One of the most prominent geological consequences of the collision was the disappearance of an epicontinental sea in Central Iran, which was a northeastern branch of the Neotethys seaway in the Oligocene-early Miocene. The timing of the final seawater retreat from Central Iran and its forcing mechanism are important for understanding the effects of Arabia-Asia plate collision as well as global eustatic sea-level changes. In this paper we present new magnetostratigraphy, U Pb ages of one tuffaceous bed, and stable isotopic records of carbonates. The results of this multidisciplinary study indicate that a shallow open sea in the Qom back-arc basin ended at 17 Ma, but the final seawater retreat from a restricted marine environment was at 16.8 Ma. The final regression was just before the Middle Miocene Optimum, implying that it was not related to a Climatic Factor, but driven by the Arabia-Asia plate collision. Moreover, the δ18O record of fine-grained lacustrine carbonates indicates an isotopic shift towards more positive isotopes after 13 Ma, suggesting an enhanced aridification in Central Iran. This Climatic deterioration was a response to reduced transport of moisture by westerlies from a retreating Neotethys Sea driven by a global eustatic sea-level drop in response to the East Antarctica ice-sheet expansion after the middle Miocene Optimum.

K R Briffa - One of the best experts on this subject based on the ideXlab platform.

  • radial growth of qilian juniper on the northeast tibetan plateau and potential climate associations
    PLOS ONE, 2013
    Co-Authors: Chun Qin, Bao Yang, Thomas M Melvin, Zexin Fan, Yan Zhao, K R Briffa
    Abstract:

    There is controversy regarding the limiting Climatic Factor for tree radial growth at the alpine treeline on the northeastern Tibetan Plateau. In this study, we collected 594 increment cores from 331 trees, grouped within four altitude belts spanning the range 3550 to 4020 m.a.s.l. on a single hillside. We have developed four equivalent ring-width chronologies and shown that there are no significant differences in their growth-climate responses during 1956 to 2011 or in their longer-term growth patterns during the period AD 1110–2011. The main climate influence on radial growth is shown to be precipitation variability. Missing ring analysis shows that tree radial growth at the uppermost treeline location is more sensitive to climate variation than that at other elevations, and poor tree radial growth is particularly linked to the occurrence of serious drought events. Hence water limitation, rather than temperature stress, plays the pivotal role in controlling the radial growth of Sabina przewalskii Kom. at the treeline in this region. This finding contradicts any generalisation that tree-ring chronologies from high-elevation treeline environments are mostly indicators of temperature changes.

Morteza Talebian - One of the best experts on this subject based on the ideXlab platform.

  • timing and forcing mechanism of the final neotethys seawater retreat from central iran in response to the arabia asia collision in the late early miocene
    Global and Planetary Change, 2020
    Co-Authors: Jimin Sun, Morteza Talebian, Chunsheng Jin, Weiguo Liu, Zhiliang Zhang, Mengmeng Cao, Brian F Windley, Morteza Sheykh, Reza Shahbazi, Shengchen Tian
    Abstract:

    Abstract The Iranian Plateau lies in the middle of the Neotethys tectonic domain; to the east it connects with the Tibetan Plateau, and to the west with the Anatolian Plateau and the Alpine orogenic belts. In the Cenozoic it underwent land/sea changes and tectonic uplift in response to the Arabia-Asia plate collision. One of the most prominent geological consequences of the collision was the disappearance of an epicontinental sea in Central Iran, which was a northeastern branch of the Neotethys seaway in the Oligocene-early Miocene. The timing of the final seawater retreat from Central Iran and its forcing mechanism are important for understanding the effects of Arabia-Asia plate collision as well as global eustatic sea-level changes. In this paper we present new magnetostratigraphy, U Pb ages of one tuffaceous bed, and stable isotopic records of carbonates. The results of this multidisciplinary study indicate that a shallow open sea in the Qom back-arc basin ended at 17 Ma, but the final seawater retreat from a restricted marine environment was at 16.8 Ma. The final regression was just before the Middle Miocene Optimum, implying that it was not related to a Climatic Factor, but driven by the Arabia-Asia plate collision. Moreover, the δ18O record of fine-grained lacustrine carbonates indicates an isotopic shift towards more positive isotopes after 13 Ma, suggesting an enhanced aridification in Central Iran. This Climatic deterioration was a response to reduced transport of moisture by westerlies from a retreating Neotethys Sea driven by a global eustatic sea-level drop in response to the East Antarctica ice-sheet expansion after the middle Miocene Optimum.