欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
采用双单片再生法在4个湖滨沉积物中测量了不同粒径石英的等效剂量值。实验结果出现两种不同情况，一种是在63-400um粒度区间，石英的De值基本一致，并随粒度增加略微减小；另一种是在125-300um粒度区间，石英的瞑值比较接近，而63—90um、甚至90-125um石英的De明显偏小约50％。第一种现象与文献[18]的报道是一致的，后一种现象难以用已有的研究成果进行解释。
英文摘要：
To investigate the feasibility of OSL dating of lakeshore sediments, equivalent dose （De） values of quartz fractions in different grain-size were measured using the ＂Double-SAR＂ protocol of optical dating in four lakeshore sediments. There are two obvious different relations between De values and grain sizes. The first situation is that the De values are accordant with eath other for fractions between 63um and 400um with a slightly decreasing tread ofDe values as increasing of grain-size. The second situation is that the De values are accordant to each other for fractions between 125um and 300um, while the De values of the 63-90um and even the 90-125um fraction are obviously smaller than others. The first is consistent with those reported elsewhere, while the second can＇t be understood by the previous theory.
同期刊论文项目
同项目期刊论文
The equvalent dose of different grain size quartz fractions from lakeshore sediments in the arid reg
Preliminary research on Megalake Jilantai-Hetao in the arid areas of China during the Late Quaternar
Reliability of pollen concentration as the indicator of effective moisture in arid and semi-arid reg
Hemlock (Tsuga canadensis) declines at 9800 and 5300 cal. yr BP caused by Holocene climatic shifts i
Magnetostratigraphy and palaeoclimatic significance of Late Neogene aeolian sequence of Lanzhou area
Vegetation history, climate change and human activities over the last 6200 years on the Liupan Mount
Effects of positive interactions, sizes ymmetry of competition and abiotic stress on self-thinning i
Sedimentary and Optically Stimulated Luminescence (OSL) dating for formation of the present northern
Reconstructed droughts for the southeastern Tibetan Plateau over the past 568 years and its linkages
Isotopic and geochemical evidence of recharge sources and water quality in the Quaternary aquifer be
GIS- and Machine Learning-Based Modeling of the Potential Distribution of Broadleaved Deciduous Fore
Do fine-grained components of loess indicate westerlies: Insights from observations of dust storm de
Compound-specific hydrogen isotopes of long-chain n-alknaes extracted from topsoil under a grassland
Ultrafine component in Chinese loess and variation over the past 7.6 Ma: implication for pedogenesis
Pollen distribution in large freshwater lake of arid region: a case study on the surface sediments f
The equivalent dose of different grain size quartz fractions from lakeshore sediments in the arid re
Evolution of prehistoric agriculture in central Gansu Province, China: A case study in Qin'an and Li
Moisture changes over the last millennium in arid central Asia: a review, synthesis and comparison w
Quantifying the effect of ecological restoration on soil erosion in China's Loess Plateau region: an
Sedimentation Geochemistry and Environmental Changes during the Late Pleistocene of Paleolake Qarhan
The variation of soil temperature and water content of seasonal frozen soil with different vegetatio
Asian summer monsoon precipitation recorded by stalagmite oxygen isotopic composition in the western
Chloride and the environmental isotopes as the indicators of the groundwater recharge in the Gobi De
Variability of skeletal growth and δ13C in massive corals from the South China Sea:Effects of photos
The Jilantai Salt Lake shorelines in northwestern arid China revealed by remote sensing images. Jour
Stream response to Quaternary tectonic and climatic change: Evidence from the upper Weihe River, cen
Molecular fossil and paleovegetation records of paleosol S4 and adjacent loess layers in the Luochua
Common tree growth anomalies over the northeastern Tibetan Plateau during the last six centuries: im
Spatiotemporal variations of Zr/Rb ratio in three last interglacial paleosol profiles across the Chi
Consistent grain size distribution of pedogenic maghemite of surface soils and Miocene loessic soils
A 1000-year chironomid-based salinity reconstruction from varved sediments of Sugan Lake, Qaidam Bas
Response of regional tree-line forests to climate change: evidence from the northeastern Tibetan Pla
Temporal change of radiocarbon reservoir effect in sugan lake, northwest china during the late Holoc
Drought variations in the eastern part of northwest China over the past two centuries: evidence from
An 850-year ostrcod-shell trace-element record from Sugan Lake, northern Tibetan Plateau, China: Imp
A high resolution record of vegetation and environmental variation through the last ～25,000 years in
Spatial modelling of the variability of the soil moisture regime at the landscape scale in the south
Possible orographic and solar controls of late Holocene centennial-scale moisture oscillations in th
Holocene natural rhythms of vegetation and present potential ecology in the estern Chinese Loess Pla
CPI values of terrestrial higher plant-derived long-chain n-alkanes: a potential paleoclimatic proxy
Modeling sensitivity study of the possible impact of snow and glaciers developing over the Tibetan P
Modeling sensitivity study of the possible impact of snow and glaciers developing over Tibetan Plate
Evaluating the role of climate and tectonics during non-steady incision of the Yellow River: evidenc
Process-Based Soil Erosion Simulation on a Regional Scale: The Effect of Ecological Restoration in t
Modern pollen representation of source vegetation in the Qaidam Basin and surrounding mountains, nor
May-June mean temperature reconstruction over the past 300 years based on tree rings in the Qilian M
Thermally Stable Maghemite Formed By Rapid High Temperature Oxidation of Fine-Grained Synthetic Magn
期刊信息
位置：