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Article: Environment and its changes in the Monsoon sandy region of China during the late pleistocene and holocene

TitleEnvironment and its changes in the Monsoon sandy region of China during the late pleistocene and holocene
Authors
KeywordsClimate fluctuations
Desert depositional periods
Late Pleistocene-Holocene
Milanggouwan stratigraphical section
Monsoon sandy region of China
Issue Date2001
PublisherZhongguo Dizhi Xuehui. The Journal's web site is located at http://dzxb-e.periodicals.net.cn/
Citation
Acta Geologica Sinica, 2001, v. 75 n. 1, p. 131-137 How to Cite?
Abstract
Situated at the southeast magrin of the Mu Us Desert, the Milanggouwan stratigraphical section in the Salawusu River Valley records 27 depositional sequences of the aeolian dune layers alternating with the fluvio-lacustrine facies and palaeosols from the Late Pleistocene to Holocene. Grain-size analysis and measurements of the susceptibility of the section show that their changes in the section may be well correlated with the variations of the aeolian dune layers, fluvio-lacustrine facies and palaeosols. Usually, the particles of aeolian dunes are coarser and well sorted with lower susceptibility values (Sv), their Mx (mean particle diameter), σ(standard deviation) and Sv being 2.33∼3.48Φ, 0.26∼0. 90 and 2∼10 (10 -8 m 3/kg SI) respectively: Whereas the particles of the fluvio-lacustrine facies and palaeosols are finer, moderately to poorly sorted with higher susceptibility values, their Mx, σ and Sv falling within the range of 3.04∼5.06Φ, 0.61∼1.77 and 10∼20 (10 -8 m 3/kg SI) respectively. Hereby it is considered with reference to the study results obtained by previous researchers that the above-mentioned alternately evolutionary sequences were, in fact, mainly induced by the climatic changes. The aeolian sand dune was deposited chiefly during the "desert period", formed under dry and cold climatic conditions; the fluvio-lacustrine facies and palaeosol are chiefly the product during the "inter-desert period", accumulated under warm humid climatic conditions. Thereby, the dune layers in the Milanggouwan section and its overlying fluvio-lacustrine facies or/and palaeosol may be regarded as a sedimentary cycle. A total of 27 cycles are recorded in the section. Each cycle represents a complete process from the cold dry to warm humid climate, and the region has experienced 27 climatic cycles of alternating cold dry and warm humid. Based on the understanding of the regional climate of the wind-drifting sands and the dust haze, induced by the southward stretch of the Sibrian-Mongolian anticyclones in the present winter and spring seasons in northern China and the space-time regularity of the summer monsoons, it is suggested that the 27 periods of aeolian sand dune accumulations in the Milanggouwan section should be a result of many times' dynamic processes of wind sands and dusts in the past geologic time, which were similar to those of the present winter and spring seasons in question, in the monsoon sandy region and even in the whole deserts of China; while the fluvio-lacustrine facies and palaeosoils sandwiched in between the dune layers were related to activities of the summer monsoon in the region. During the cold stages (glacial periods) in the Northern Hemisphere since the Late Pleistocene, the Sibrian -Mongolian anticyclones raced off towards the middle altitudes of China, the monsoon sandy region was in a desert period, the winter monsoons prevailed in the region, the climate became dry and cold, wind erosion and deposition were violent, the deserts were active intensely and expanded, and the sediments were mainly aeolian sand dunes. During the warm stages (interglacial periods) in the Northern Hemisphere, the frequencies of the winter monsoon occurring southwards decreased greatly; the monsoon sandy region was in an inter-desert period; the summer monsoon prevailed; the climate became warm and humid; rivers, lakes and swamps were well developed; a series of soil-forming processes occurred on the ground. As a result, the fluvio-lacustrine facies accumulated in depressions between the dunes and palaeosols formed on mobile dunes, thereby making the dunes fixed. Multiple alternation of glacial and interglacial periods in the Northern Hemisphere from the Late Pleistocene to Holocene caused the confrontation and antipathetic changes of the winter monsoons and the summer monsoons and the alternating desert period and inter-desert period, and the activation of mobile sand dunes and fixation experienced a series of normal and reverse commutative processes.
Persistent Identifierhttp://hdl.handle.net/10722/86381
ISSN
2013 SCImago Journal Rankings: 0.634
References

 

Author Affiliations
  1. South China Normal University
DC FieldValueLanguage
dc.contributor.authorLi, Ben_HK
dc.contributor.authorWu, Zen_HK
dc.contributor.authorDavid Dian, Zen_HK
dc.contributor.authorFan, Aen_HK
dc.contributor.authorYan, Men_HK
dc.contributor.authorSun, Wen_HK
dc.contributor.authorjin, Hen_HK
dc.contributor.authorDong, Gen_HK
dc.contributor.authorZhu, Yen_HK
dc.contributor.authorGao, Qen_HK
dc.contributor.authorZhang, Jen_HK
dc.date.accessioned2010-09-06T09:16:07Z-
dc.date.available2010-09-06T09:16:07Z-
dc.date.issued2001en_HK
dc.identifier.citationActa Geologica Sinica, 2001, v. 75 n. 1, p. 131-137en_HK
dc.identifier.issn0001-5717en_HK
dc.identifier.urihttp://hdl.handle.net/10722/86381-
dc.description.abstractSituated at the southeast magrin of the Mu Us Desert, the Milanggouwan stratigraphical section in the Salawusu River Valley records 27 depositional sequences of the aeolian dune layers alternating with the fluvio-lacustrine facies and palaeosols from the Late Pleistocene to Holocene. Grain-size analysis and measurements of the susceptibility of the section show that their changes in the section may be well correlated with the variations of the aeolian dune layers, fluvio-lacustrine facies and palaeosols. Usually, the particles of aeolian dunes are coarser and well sorted with lower susceptibility values (Sv), their Mx (mean particle diameter), σ(standard deviation) and Sv being 2.33∼3.48Φ, 0.26∼0. 90 and 2∼10 (10 -8 m 3/kg SI) respectively: Whereas the particles of the fluvio-lacustrine facies and palaeosols are finer, moderately to poorly sorted with higher susceptibility values, their Mx, σ and Sv falling within the range of 3.04∼5.06Φ, 0.61∼1.77 and 10∼20 (10 -8 m 3/kg SI) respectively. Hereby it is considered with reference to the study results obtained by previous researchers that the above-mentioned alternately evolutionary sequences were, in fact, mainly induced by the climatic changes. The aeolian sand dune was deposited chiefly during the "desert period", formed under dry and cold climatic conditions; the fluvio-lacustrine facies and palaeosol are chiefly the product during the "inter-desert period", accumulated under warm humid climatic conditions. Thereby, the dune layers in the Milanggouwan section and its overlying fluvio-lacustrine facies or/and palaeosol may be regarded as a sedimentary cycle. A total of 27 cycles are recorded in the section. Each cycle represents a complete process from the cold dry to warm humid climate, and the region has experienced 27 climatic cycles of alternating cold dry and warm humid. Based on the understanding of the regional climate of the wind-drifting sands and the dust haze, induced by the southward stretch of the Sibrian-Mongolian anticyclones in the present winter and spring seasons in northern China and the space-time regularity of the summer monsoons, it is suggested that the 27 periods of aeolian sand dune accumulations in the Milanggouwan section should be a result of many times' dynamic processes of wind sands and dusts in the past geologic time, which were similar to those of the present winter and spring seasons in question, in the monsoon sandy region and even in the whole deserts of China; while the fluvio-lacustrine facies and palaeosoils sandwiched in between the dune layers were related to activities of the summer monsoon in the region. During the cold stages (glacial periods) in the Northern Hemisphere since the Late Pleistocene, the Sibrian -Mongolian anticyclones raced off towards the middle altitudes of China, the monsoon sandy region was in a desert period, the winter monsoons prevailed in the region, the climate became dry and cold, wind erosion and deposition were violent, the deserts were active intensely and expanded, and the sediments were mainly aeolian sand dunes. During the warm stages (interglacial periods) in the Northern Hemisphere, the frequencies of the winter monsoon occurring southwards decreased greatly; the monsoon sandy region was in an inter-desert period; the summer monsoon prevailed; the climate became warm and humid; rivers, lakes and swamps were well developed; a series of soil-forming processes occurred on the ground. As a result, the fluvio-lacustrine facies accumulated in depressions between the dunes and palaeosols formed on mobile dunes, thereby making the dunes fixed. Multiple alternation of glacial and interglacial periods in the Northern Hemisphere from the Late Pleistocene to Holocene caused the confrontation and antipathetic changes of the winter monsoons and the summer monsoons and the alternating desert period and inter-desert period, and the activation of mobile sand dunes and fixation experienced a series of normal and reverse commutative processes.en_HK
dc.languageengen_HK
dc.publisherZhongguo Dizhi Xuehui. The Journal's web site is located at http://dzxb-e.periodicals.net.cn/en_HK
dc.relation.ispartofActa Geologica Sinicaen_HK
dc.subjectClimate fluctuationsen_HK
dc.subjectDesert depositional periodsen_HK
dc.subjectLate Pleistocene-Holoceneen_HK
dc.subjectMilanggouwan stratigraphical sectionen_HK
dc.subjectMonsoon sandy region of Chinaen_HK
dc.titleEnvironment and its changes in the Monsoon sandy region of China during the late pleistocene and holoceneen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1000-9515&volume=75&issue=1&spage=127&epage=137&date=2001&atitle=Environment+and+its+changes+in+the+monsoon+sandy+region+of+China+during+the+Late+Pleistocene+and+Holoceneen_HK
dc.identifier.emailDavid Dian, Z:zhangd@hkucc.hku.hken_HK
dc.identifier.authorityDavid Dian, Z=rp00649en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0034990714en_HK
dc.identifier.hkuros57550en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0034990714&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume75en_HK
dc.identifier.issue1en_HK
dc.identifier.spage131en_HK
dc.identifier.epage137en_HK
dc.publisher.placeChinaen_HK
dc.identifier.scopusauthoridLi, B=23389484100en_HK
dc.identifier.scopusauthoridWu, Z=7501411415en_HK
dc.identifier.scopusauthoridDavid Dian, Z=9732911600en_HK
dc.identifier.scopusauthoridFan, A=7005672898en_HK
dc.identifier.scopusauthoridYan, M=7402521028en_HK
dc.identifier.scopusauthoridSun, W=15418854000en_HK
dc.identifier.scopusauthoridjin, H=7403073387en_HK
dc.identifier.scopusauthoridDong, G=7201472410en_HK
dc.identifier.scopusauthoridZhu, Y=37040277600en_HK
dc.identifier.scopusauthoridGao, Q=7202743837en_HK
dc.identifier.scopusauthoridZhang, J=7601354348en_HK

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