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Either your web browser doesn’t support Javascript or it is currently turned off. In the latter case, please turn on Javascript support in your web browser and reload this page. Author contributions: X. All authors shared ideas and results and helped produce the final manuscript. This study documents dramatic environmental and landscape changes in this desert during the last 10, years. For the first time to our knowledge we present a case of desertification mainly triggered by changes in the hydrological and geomorphological system, associated with climate change at ca.

Luminescence Dating: Applications in Earth Sciences and Archaeology

The range has many of Earth ‘s highest peaks, including the highest, Mount Everest , at the border between Nepal and China. The Himalayan range is bordered on the northwest by the Karakoram and the Hindu Kush ranges. The Himalayas are inhabited by Formerly, they were described in the singular as the Himalaya and rendered as Himavan in older writings. This was also previously transcribed as Himmaleh , as in Emily Dickinson ‘s poetry [9] [10] and Henry David Thoreau ‘s essays.

Abstract Aeolian samples from deserts in northern China were studied using the optically stimulated luminescence (OSL) of quartz and potassium (K) feldspar.

Deserts are widely distributed in northwestern China in a wide range of geomorphological and tectonic settings, from m below sea level to more than m above sea level asl. In this paper the author briefly reviewed some of the recent studies aiming to understand the formation and changes of the sand seas in northwestern China. Loess sequences in Loess Plateau indicated that deserts in western China may have existed already 22 Myr ago, but geomorphological and sedimentological evidence found in the deserts suggests a much younger age.

The geomorphological link between the Tertiary deserts and the present-day ones is not yet understood. In many parts of the deserts in northwestern China, late Pleistocene or even Holocene lacustrine and fluvial sediments are buried under the dunes, showing abrupt Late Quaternary environmental changes in the dune areas. Although the mechanisms for the formation of the megadunes in the Badain Jaran Desert are controversially argued in various publications – landforms control vs.

Osl Dating Of Sediments From Deserts In Northern China

Courtillot, V. On causal links between flood basalts and continental breakup, Earth Planet. Three-dimensional dynamical model of continental rift propagation and margin plateau formation, J. Fossil hot spot-ridge interaction in the Musicians Seamount Province: geophysical investigations of hot spot volcanism at volcanic elongated ridges, J.

Effects of igneous activity in the offshore northern Perth Basinevidence from petroleum exploration wells, 2D seismic and magnetic surveys, in Western Australian Basins Symposium III, pp. Craddock, C.

This paper focuses on OSL dating results of a large set of sand dunes and Sand dune accumulation and related alluvial sediments from arid and Dune mobility and aridity at the desert margin of northern China at a time of.

Physicists study the properties of matter and energy. They use the language of mathematics—codified logic—to describe and explain everything from the behavior of elementary particles to the structure of the observable universe. In this regard physics is the fundamental science as well as the quantitative discipline: Physicists can be found in such diverse occupations as medicine, finance, and engineering, to name a few. Learn more about physics at ECU.

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Canadian Journal of Earth Sciences

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Optically Stimulated Luminescence (OSL), now a well established events (OSL dating) but also as sedimentological characterisers: a) Selective representation of sediment sources in tsunami deposits from the Shetland Islands (UK) of the Dazhushan site in Shandong Peninsula, coastal north China.

Deze blog is opgedragen aan mijn overleden echtgenote Lucienne. In verloor ze haar moedige strijd tegen kanker! In startte ik deze blog, omdat ik niet moc ht stoppen met mijn UFO-onderzoek. A new study from The University of Texas at Austin is helping scientists piece together the ancient climate of Mars by revealing how much rainfall and snowmelt filled its lake beds and river valleys 3. New research from The University of Texas at Austin has used dry Martian lake beds to determine how much precipitation was present on the ancient planet.

Credit: Gaia Stucky de Quay. The ancient climate of Mars is something of an enigma to scientists. To geologists, the existence of riverbeds and paleolakes — eons-old lake basins — paints a picture of a planet with significant rainfall or snowmelt.

OSL dating of sediments from deserts in northern China

AbstractThis study examines the feasibility of applying luminescence dating methods to quartz and potassium feldspar K-feldspar grains from Quaternary continental deposits of the Mejillones Peninsula and Coastal Cordillera in Central Atacama, northern Chile. The results of the analytical procedures indicate that quartz grains extracted from the studied sediments present a very weak or even no fast OSL component. Fading rates for the pIRIR signal yielded variable results among sampling sites, with g-values ranging between 0.

K-feldspar ages also allow to constrain the age of fault scarp degradation and fault reactivation in two main branches of the Atacama Fault System. Search All.

Natural Resources Research, Chinese Academy of Sciences, Beijing , Globally, sulphate is rich in arid to semi-arid deserts, including the aeolian loess sediments in China and stimulated luminescence (OSL) dating and radio-.

Exploration of the development of these sand dunes will be helpful for identifying the forces underlying the desert landscape and for identifying a solution to protect the salt resources. Through field investigation, we found sand dunes overlying either lacustrine and bog deposits on the lake bed at a lower altitude or littoral sediments on the higher lakeshores. Optically Stimulated Luminescence OSL dating results indicate that sands started to accumulate around the JSL as early as the early Holocene around 11 ka , while the rapid development of sand dunes occurred within the latest 0.

By comparison with climatic documents and human activities in adjacent regions, the initiation of sand accumulation around the JSL as early as the early Holocene is considered to be the result of low effective moisture in the Jilantai area. However, the rapid development of the sand dunes in the vast area surrounding the JSL was likely initiated by the intensified human activities which occurred within the latest 0. Please wait a minute

Department of Physics

Exploration of the development of these sand dunes will be helpful for identifying the forces underlying the desert landscape and for identifying a solution to protect the salt resources. Through field investigation, we found sand dunes overlying either lacustrine and bog deposits on the lake bed at a lower altitude or littoral sediments on the higher lakeshores. Optically Stimulated Luminescence OSL dating results indicate that sands started to accumulate around the JSL as early as the early Holocene around 11 ka , while the rapid development of sand dunes occurred within the latest 0.

ics or/and westerly airflow over China that follow the general trend of northern hemispheric insolation patterns (e.g. Chen et al.,. cene signals in proxy records from lake sediments as direct responses to Keywords. DGPS measurement, Gobi Desert, Holocene, Mongolian Plateau, OSL dating, paleolake shoreline.

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This paper focuses on OSL dating results of a large set of sand dunes and alluvial sediments 50 OSL ages from the Qinwangchuan QWC Basin at the northeast edge of the Tibetan Plateau, with the aim to test the validity of the anomalous wet condition for the late MIS 3 interval, evidenced by numerous lake highstands. Thus, the anomalous wet conditions revealed by high lake levels for the late MIS 3 phase may not be a universal phenomena across entire western China.

Over the past several decades, climatic and environmental changes during the last glacial period in western China, including the arid and semiarid regions of northwest China and the Tibetan Plateau, have been extensively reconstructed using records from lakes, ice cores and loess-palaeosol units. Consequently, an anomalous warm and wet late interstadial within the last glacial period has been supposed for western China. The apparently unique regional warm and humid pattern of late MIS 3 i.

The lake-based wet climate anomaly is also considerably inconsistent with other regional proxy records showing the late MIS 3 period was relatively drier compared with the last interglacial period and the post-glacial Holocene stage 21 , 22 , 23 , 24 , 25 , These controversies have led to the conclusion that the anomalously wet climate basically inferred from numerous lakes remains an enigma 29 , Sand dune accumulation and related alluvial sediments from arid and semiarid areas have been considered as an archive of past moisture variations due to their sensitivities to alternations of regional aridity and wetness and related atmospheric circulations 31 , 32 , 33 ,

Optically Stimulated Luminescence Fundamentals and Applications