Results 21 to 30 of about 233,985 (228)

Magnetic Proxy of Eurasian Loess Revealing Enhanced Physical Erosion Since the Mid‐Pleistocene Transition

Geophysical Research Letters, 2023
Eolian loess deposits contain valuable information about past climate changes and erosion history in dust source regions. In contrast to the extensive investigations of paleoclimatic implications of Eurasian loess, continental erosion information in the ...
Wenxiao Ning, Jinbo Zan, Friedrich Heller, Xiaomin Fang, Yuao Zhang, Weilin Zhang, Jian Kang, Miaomiao Shen   +7 more
doaj   +1 more source

Variation of luminescence sensitivity of quartz grains from loess in eastern Tibetan Plateau and its provenance significance

Frontiers in Earth Science, 2022
The loess deposits widely distributed in the eastern Tibetan Plateau (ETP) are important archives for reconstructing the paleoenvironmental changes and dust transportation history of the Tibetan Plateau.
Li Liu, Shengli Yang, Xiaojing Liu, Pushuang Li, Haiyan Wang, Jiantao Zhou   +5 more
doaj   +1 more source

Investigation of Aeolian Dust Deposition Rates in Different Climate Zones of Southwestern Iran

Atmosphere, 2021
Dust and atmospheric particles have been described in southwestern Iran primarily in terms of load, concentration and transport. The passive deposition, however, has been discussed inadequately.
Mansour Ahmadi Foroushani, Christian Opp, Michael Groll   +2 more
doaj   +1 more source

Dust deposition and ambient PM₁₀ concentration in northwest China: spatial and temporal variability [PDF]

Atmospheric Chemistry and Physics, 2017
Eolian dust transport and deposition are important geophysical processes which influence global bio-geochemical cycles. Currently, reliable deposition data are scarce in central and east Asia.
X.-X. Zhang, B. Sharratt, X. Chen, Z.-F. Wang, L.-Y. Liu, Y.-H. Guo, J. Li, H.-S. Chen, W.-Y. Yang   +8 more
doaj   +1 more source

Eolian Dust and the Origin of Sedimentary Chert [PDF]

Open-File Report, 2004
This paper proposes an alternative model for the primary source of silica contained in bedded sedimentary chert. The proposed model is derived from three principal observations as follows: (1) eolian processes in warm-arid climates produce copious amounts of highly reactive fine-grained quartz particles (dust), (2) eolian processes in warm-arid ...
openaire   +1 more source

Late Quaternary Records of the Atmospheric Input of Eolian Dust to the Center of the Chinese Loess Plateau

, 1994
The concentrations of 15 elements and mineral grain-size distributions were determined for Late Quaternary loess sediments from the Chinese Loess Plateau. Particle-size distributions of the loess were approximately log-normal for each of three modes (i.e.
Richard Arimoto, T. Chen, Z. S. An, Barbara J. Ray, X. Y. Zhang, G. Y. Zhang   +5 more
core   +2 more sources

Non‐Chained, Non‐Interacting, Stable Single‐Domain Magnetite Octahedra in Deep‐Sea Red Clay: A New Type of Magnetofossil?

Geochemistry, Geophysics, Geosystems, 2021
Magnetic detection and classification of magnetofossils have been proposed as potential tools for paleoenvironmental studies. Magnetosomes in bacterial species living in different environmental conditions exhibit different grain morphologies and chain ...
Yoichi Usui, Toshitsugu Yamazaki
doaj   +1 more source

Formation Age and Causes of Alpine Meadow Soil in Three River Headwater Region Based on Optically Stimulated Luminescence Dating

Shuitu baochi tongbao, 2022
[Objective] The age, occurrence, and development of alpine meadow soil in the Three River headwater region were analyzed to provide guidance for maintaining soil and ecological security in the region.
Xianbaji, E Chongyi, Sun Manping, Zhang Jing, Zhang Shuaiqi, Xie Liqian   +5 more
doaj   +1 more source

Geochemical characteristics of the Tertiary and Quaternary eolian deposits in eastern Gansu province: Implications for provenance and weathering intensity

Dizhi lixue xuebao, 2021
An eolian deposit section named Shaozhai, which has been developed since the Tertiary in eastern Gansu province, was analyzed for major-trace elements and Sm-Nd isotopic compositions to explore the relationship for the provenance and weathering intensity
QI Lin, QIAO Yansong, LIU Zongxiu, WANG Yan, PENG Shasha   +4 more
doaj   +1 more source

Minor effect of physical size sorting on iron solubility of transported mineral dust [PDF]

, 2011
Observations show that the fractional solubility of Fe (FS-Fe, ratio of dissolved to total Fe) in dust aerosol increases dramatically from ~0.1% in regions of high dust mass concentration to 80% in remote regions where concentrations are low.
G. Fones, Drake, N, N. Drake, Fones, G., Brooks, B., Carslaw, KS, Jickells, T. D., Drake, N., Krom, MD, Fones, Gary, Jickells, TD, G. W. Mann, B. Brooks, Mann, GW, Brooks, B, Benning, L. G., Woodhouse, M. T., Baker, AR, G. R. Fones, Shi, Z. B., Baker, A. R., Carslaw, K. S., Z. B. Shi, M. D. Krom, L. G. Benning, Savov, I, T. D. Jickells, Shi, Zongbo; id_orcid, Krom, M. D., K. S. Carslaw, Benning, LG, Fones, G. R., A. R. Baker, Woodhouse, M. T, Savov, I., M. T. Woodhouse, Mann, G. W., Fones, GR, I. Savov, Woodhouse, MT   +39 more
core   +2 more sources