Late Eocene sea retreat from the Tarim Basin (west China) and concomitant Asian paleoenvironmental change

Bosboom, Roderic; Dupont‐Nivet, Guillaume; Houben, Alexander J. P.; Brinkhuis, Henk; Villa, Giuliana; Mandić, Oleg; Stoica, Marius; Zachariasse, Willem-Jan; Guo, Zhaojie; Li, Chuanxin; Krijgsman, Wout

doi:10.1016/j.palaeo.2010.11.019

Cited by 238 publications

(257 citation statements)

References 61 publications

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“…6 Ma (Abels et al, 2011). This regional aridification has previously been linked to the coeval retreat of the Tarim Sea to the West (Abels et al, 2011;Bosboom et al, 2011) which may have further enhanced monsoons with increasing aridification in the basins. Increased drought in the basin versus humidity on the slopes is expected with monsoonal intensification such that local topography might have played an important role in mediating regional climate changes, as induced by uplifting air in the surrounding mountains and subsidence of air masses in a basin (Zhao et al, 2010).…”

Section: Discussionmentioning

confidence: 88%

“…This change is considered to be a product of vegetation change following regional aridification initiated at~36. 6 Ma (C16r) and is coeval with the retreat of the Tarim sea (Abels et al, 2011;Bosboom et al, 2011); b) a second step, an increase in clastic sedimentation rate at~34. 7 Ma, however, is not mirrored by palynological change.…”

Section: Discussionmentioning

confidence: 99%

“…Also, an older aridification event around 36. 6 Ma has been tentatively related to a combination of incipient ice sheet development, retreat of the Tarim sea and reduced moisture transport to the Xining Basin, indicating global climate impact on this region (Abels et al, 2011;Bosboom et al, 2011). …”

Section: General Geologymentioning

confidence: 99%

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A late Eocene palynological record of climate change and Tibetan Plateau uplift (Xining Basin, China)

Hoorn

Straathof

Abels

et al. 2012

Palaeogeography, Palaeoclimatology, Palaeoecology

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126

111

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General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. Climate models suggest that Asian paleoenvironments, monsoons and continental aridification were primarily governed by tectonic uplift and sea retreat since the Eocene with potential contribution of global climate changes. However, the cause and timing of these paleoenvironmental changes remain poorly constrained. The recently well-dated continental mudflat to ephemeral saline lake sedimentary succession, situated in the Xining Basin at the northeastern margin of the Tibetan Plateau (NW China), provides a unique opportunity to develop additional proxy successions in this area that are placed accurately in time. Here, a palynological record from this succession is reported. High abundances of desert and steppe-desert taxa such as Ephedripites and Nitrariadites/Nitraripollis are found, which can be differentiated by the presence of broad leaved deciduous forest taxa in the lower part of the section (particularly up to 36.4 Ma; magnetochron C16r), and a sudden increase of Pinaceae (Pinuspollenites, Piceaepollenites and Abiespollenites) which is dated at 36.1 Ma (C16n.2n). Coexistence Approach (CoA) indicates that from 39.9 to 36.4 Ma (C17n.1n) regional climate was warm and wet, while from 36.4 to 33.5 Ma (C16n.2n-C13r) climate tends to be cooler and drier. The data indicate that paleoenvironmental and palynological changes on the NE part of the Tibetan Plateau resulted from a combination of long-term tectonic uplift forcing and long-and short-term climate changes. The increase of taxa such as Piceaepollenites and Abiespollenites indicates not only a cooling and drying trend prior to the Eocene/Oligocene (E/O) boundary, but also the existence of high altitude mountain habitats in the periphery of the Xining Basin. The sudden Pinaceae event correlates closely in time with a marked aridification step as viewed from the lithology of the Xining Basin that was linked to the sea retreat out of the Tarim Basin.

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Section: Discussionmentioning

confidence: 88%

Section: Discussionmentioning

confidence: 99%

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A late Eocene palynological record of climate change and Tibetan Plateau uplift (Xining Basin, China)

Hoorn

Straathof

Abels

et al. 2012

Palaeogeography, Palaeoclimatology, Palaeoecology

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126

111

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“…Although the retreat of the shallow Paratethys Sea has also been identified as an important factor in the decreasing precipitation in Central Asia (Ramstein et al, 1997;Zhang et al, 2007), this seems to have occurred before the late Cenozoic (Bosboom, et al, 2011).…”

Section: Y F Miao Et Al: Late Cenozoic Continuous Aridificationmentioning

confidence: 99%

“…Additional considerations include the influence of the retreat of the shallow Paratethys (Ramstein et al, 1997;Zhang et al, 2007) or topographic teleconnections (e.g., C. F. Bosboom et al, 2011). However, the Paratethys is thought to have mostly retreated from the Tarim Basin before the Miocene (e.g., Bosboom et al, 2011), suggesting no direct relationship with the late Cenozoic period currently under discussion.…”

Section: Global Cooling and Tibetan Plateau Upliftmentioning

confidence: 99%

Late Cenozoic continuous aridification in the western Qaidam Basin: evidence from sporopollen records

Miao

Fang

et al. 2013

Clim. Past

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Cenozoic climate changes in inner Asia provide a basis for understanding linkages between global cooling, the Tibetan Plateau uplift, and possibly the development of the East Asian monsoon. Based on a compilation of palynological results from the western Qaidam Basin, this study reconstructed a 15-million-year (Ma) record of changing vegetation and paleoclimates spanning the middle Miocene to present (comprising two series: ~ 18–5 Ma and ~ 3.1–0 Ma, respectively). The thermophilic percentages were highest between 18 and 14 Ma, and decreased after 14 Ma, closely corresponding to the Middle Miocene Climatic Optimum (MMCO) between 18 and 14 Ma and the following global climatic cooling between 14 and 5 Ma. At the same time, decreases in the xerophytic and coniferous taxa percentages, and the increasing logarithmic ratio of non-arboreal pollen to arboreal pollen (ln (NAP/AP)), reveal the continuous aridification across both the basin and surrounding mountains. Between ~ 3.1 and 0 Ma, the percentages of the thermophilic, xerophytic and coniferous pollen as well as the ln (NAP/AP) imply further cooling and drying in this region since 3.1 Ma. We argue that these vegetation and climate patterns during the late Cenozoic western Qaidam Basin are primarily a result of the global cooling, with the Tibetan Plateau uplift and East Asian summer monsoon having contributions of lesser importance

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Oligocene clockwise rotations along the eastern Pamir: Tectonic and paleogeographic implications

et al. 2014

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Despite the importance of the Pamir range in controlling Asian paleoenvironments and land-sea paleogeography, its tectonic evolution remains poorly constrained in time and space, hindering its potential for understanding deep to surface processes. We provide here new constraints on vertical-axis tectonic rotations from the southwest Tarim Basin along the eastern flank of the Pamir arcuate range based on paleomagnetic results. Two well-dated Eocene to Oligocene sections, previously analyzed using biostratigraphy and magnetostratigraphy, yield consistently clockwise rotations of 21.6 ± 4.2°in 41 to 36 Ma strata then 17.1 ± 6.5°in 33 to 28 Ma strata at the Aertashi section and 14.2 ± 11.5°in 41 to 40 Ma strata at the Kezi section. Combined with a regional review of existing paleomagnetic studies, these results indicate that most of the clockwise rotations along the eastern Pamir occurred during Oligocene times and did not extend systematically and regionally into the Tarim Basin. In contrast, on the western flank of the Pamir tectonic rotations in Cretaceous to Neogene strata are regionally extensive and systematically counterclockwise throughout the Afghan-Tajik Basin. This timing and pattern of rotations is consistent with paleogeographic reconstructions of the regional sea retreat out of Central Asia and supports a two-stage kinematic model: (1) symmetric rotations of either flanks of the Pamir arcuate range until Oligocene times followed by (2) continued rotations on its western flank associated with radial thrusting and, along the eastern flank, no further rotations due to decoupled transfer slip starting in the Early Miocene.

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Late Eocene sea retreat from the Tarim Basin (west China) and concomitant Asian paleoenvironmental change

Cited by 238 publications

References 61 publications

A late Eocene palynological record of climate change and Tibetan Plateau uplift (Xining Basin, China)

A late Eocene palynological record of climate change and Tibetan Plateau uplift (Xining Basin, China)

Late Cenozoic continuous aridification in the western Qaidam Basin: evidence from sporopollen records

Oligocene clockwise rotations along the eastern Pamir: Tectonic and paleogeographic implications

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