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Assemblage characteristics of clay minerals and its implications to evolution of eolian dust input to the Parece Vela Basin since 1.95 Ma

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Chinese Journal of Oceanology and Limnology 2014年第1期32卷 174-186页

作者：明洁李安春黄杰万世明孟庆勇蒋富清闫文文 Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of Sciences University of Chinese Academy of Sciences First Institute of Oceanography State Oceanic Administration

To understand the provenance and evolution of eolian input in the last 1.95 Ma in the Parece Vela Basin in the eastern Philippine Sea, the clay mineral assemblage of a gravity core PV090510 from the basin was investigated using paleogeomagnetic dating and X-ray diffraction. The assemblage of the core mainly consisted of smectite （-46%） and illite （-40%）, with some chlorite （-10%） and kaolinite （-4%）. Analysis of the provenance of these minerals suggested that smectite was mainly derived from volcanic rocks of the Mariana Arc, while illite, chlorite, and kaolinite were mainly transported as eolian dust by the East Asian monsoon from central Asia. We used the ratio of （illite＋chlorite＋kaolinite）/smectite as a proxy for Asian eolian input to the Parece Vela Basin since 1.95 Ma. This ratio followed glacial and interglacial cycles and was consistent with the intensity of the East Asian monsoon and aridity of central Asia since 1.95 Ma. The changes of the ratio reflected three different stages of the East Asian monsoon and provenance climate.

关键词： eolian dust East Asian winter monsoon clay mineral provenance Parece Vela Basin

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Evolution of Asian drying since 30 Ma revealed by clay minerals record in the West Pacific and its tectonic-climatic forcing

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Science China Earth Sciences 2023年第6期66卷 1365-1382页

作者： Yi TANG Shiming WAN Debo ZHAO Zhaojie YU Zhaokai XU Jin ZHANG Zehua SONG Mengjun LI Hualong JIN Wenjun JIAO Hongkun DONG Anchun LI Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and TechnologyQingdao 266061China University of Chinese Academy of Sciences Beijing 100049China

As the second largest dust source on the globe,the tectonic and climatic evolution of continental Asia has an important impact on regional and global climate *** West Pacific is the main sediment sink for eolian dust transported eastward from the Asian *** minerals,as the major fine-grained weathering products of continental rocks,can be readily transported by wind or currents over long distances and thus have been widely used in the reconstruction of paleoclimate and weathering ***,the overall evolutionary tendency and response mechanism of clay mineral records over large spatial and long timescales across Asia remain ***,two continuous and high-resolution clay mineral records since 30 Ma were reconstructed from sediments at Deep Sea Drilling Program(DSDP)Sites 292 and 296 in the Philippine *** minerals and Sr-Nd isotope compositions were used to constrain provenance and reconstruct the drying history of the dust source region since the *** results show that the clay-sized detrital sediments in the Philippine Sea are a mixture of Asian eolian dust and volcanic materials from the West Pacific *** on the clay mineral compositions and eolian flux,we reveal that the Asian interior has been continuously drying since the late Oligocene and that stepwise enhanced aridification occurred at approximately 20,14,7,and 3 *** with other regions of the world,the relative contents of illite and chlorite increased more dramatically in Asia during the late Cenozoic,and the inconsistency became more obvious at approximately 20 *** 3 Ma,illite and chlorite have increased consistently across the *** with the Asian tectonic and climatic history,we suggest that the increase in illite and chlorite from Asia between 20 and 3 Ma was mainly in response to the uplift of the Himalayan-Tibetan Plateau,whereas after 3 Ma,it was primarily controlled by global cooling driven by the expansion of the Arctic ice shee

关键词： Clay minerals Sr-Nd isotopes Sediment provenance eolian dust West Pacific Late Cenozoic

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Geochemistry of rare earth elements in the mid-late Quaternary sediments of the western Philippine Sea and their paleoenvironmental significance

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Science China Earth Sciences 2014年第4期57卷 802-812页

作者： XU ZhaoKai LI TieGang WAN ShiMing YIN XueBo JIANG FuQing SUN HanJie JinYong CHOI DhongIl LIM Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of Sciences Department of Oceanography Kunsan National University South Sea Institute Korea Institute of Ocean Science and Technology

Based on a δ180 chronology, rare earth elements （REE） and other typical elements in sediments from core MD06-3047 in the western Philippine Sea were analyzed to constrain the provenances of the sediments and investigate quantitative changes in the Asian eolian input to the study area over the last 700 ka. Among the competing processes that might affect REE compositions, sediment provenance is the most important one. Provenance analysis suggests that the study sediments have two provenance end-members; local volcanic sources are dominant, and eolian dust from the Asian continent has a smaller contribution. During glacial periods, eolian input to the western Philippine Sea was enhanced. In contrast, material supply from local volcanics in- creased during interglacial periods. Changes in eolian input to the study area were probably related to the strength of the East Asian winter monsoon （EAWM） as well as aridity in the Asian continent on an orbital time scale, and were partly influenced by local control factors on shorter time scales. Therefore, we propose that the present study expands the application of the REE-based method for quantitatively estimating the eolian component from the mid-latitude northern Pacific to the low-latitude western Pacific. Additionally, the study preliminarily confirms the influence of EAWM-transported eolian materi- al on sedimentation in the western Philippine Sea since 700 ka.

关键词： eolian dust sediment provenance rare earth elements East Asian winter monsoon glacial/interglacial cycle western Philippine Sea

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Temporal variations in Pb isotopes and trace element concentrations within Chinese eolian deposits during the past 8 Ma:Implications for provenance change

Temporal variations in Pb isotopes and trace element concent...

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中国科学院地质与地球物理研究所第十届(2010年度)学术年会

作者： Jimin Sun~(a,*),Xiangkun Zhu~b a Key Laboratory of Cenozoic Geology and Environment,Institute of Geology and Geophysics,Chinese Academy of Sciences,P.0.Box 9825,Beijing 100029,China b Laboratory of Isotope Geology,MLR,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China

The Pb isotopes and trace element compositions of the silicate fraction of airborne dust from the Chinese Loess Plateau were analyzed to infer provenance change during the past 8 *** results indicate that the composition of eolian dust changed at 2.6 Ma,coincident with initiation of the Northern Hemisphere ice *** change in trace element composition at 2.6 Ma indicates that a larger component of the eolian dust was derived from felsic rocks after this *** isotopic evidence demonstrates that the source material of Tertiary Red Clay differs to some extent from that of Quaternary eolian *** chemical weathering may result in compositional changes in eolian deposits,such a scenario is not supported by the present *** that glacial grinding and frost-weathering processes have been active in the peaks of high mountains during the Quaternary,eolian dust of this age contains a large proportion of material derived from areas of high topographic relief and relatively little material from low-lying cratonic *** alpine processes played an important role in controlling the distinct changes in Pb isotopes and trance element concentrations recorded at around 2.6 Ma.

关键词： eolian dust provenance Loess Plateau glacial history geochemistry

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