Geochemical Characteristics Of The Quaternary Sediments And Its Environmental Significance In Changbai Mountains

Since its unique geographical location, natural landscape, topography, volcanic group and other factors, Changbai Mountains has been the hotspots on which researchers focus, and Changbai Mountains is also the place that one of the few recognized exist glacier activity across the country. Therefore, Changbai Mountains have important the value of this study during the Quaternary glacial and interglacial cycles. by the age determination of sediments in the Pleistocene Ice Age, This article will take in-depth comparative studies during the Quaternary in Changbai Mountains, specially during the Bulaoke Glacial Stage, and try to select geochemistry element parameter from each profile for each profile of the climate change research.In this study, carried on field observations,gathered the ESR age of sample and geochemistry sample in the corresponding profile and so on, ESR dating methods used to determine the age of samples, the content of oxides of major elements and microelement of the geochemistry sample were analyzed by the X-ray fluorescence spectrometer.Through the sediment age was determined by the ESR dating, had determined the age of the samples belongs to the Quaternary in the mid Pleistocene series, which the age of the HHDB-016 and the age of the HHDB-018 were all within the Bulaoke Glacial Stage, finally on the basis of use of deep-sea oxygen isotope and domestic use of the existing age-ice age era glacial sediments, glacial-interglacial cycle is given by comparing again in Changbai Mountains during the Quaternary in the mid Pleistocene series.After having determined the sediment age on the corresponding profiles, discusses carries on traceback investigations about the corresponding profile climate through the geochemistry method, Geochemical elements on the environment and climate response has always been the hotspot in the research on climate change, but how to select the appropriate geochemical parameters, will be directly related to reflect the climate sensitivity and accuracy, gathered the samples the content of oxides of major elements and microelement of the geochemistry sample were analyzed on this paper, in order to select preferably the geochemical parameters and understand the different profiles of elements, has mainly carried on three aspect discussions and the attempt: first, on the basis of precedent achievements on the characteristics of glacial-interglacial sediments, obtained some geochemistry parameter change situation from the geochemistry element research of glacial sediments at the Lushan Mountain; second, each profiles'geochemistry elements were analyzed by R factor, through loading matrix,which obtains, has analyzed the different element combination characteristic; third, carries on the statistics to each profiles'geochemistry element's content,the variation coefficient and the enrichment coefficient were calculated, element's behavior was reflected on each profiles from the relatively enriched and relative loss of the dynamic changes.Through a series of preparatory work, the HHDB-016 profile has selected five geochemistry parameters, respectively is: CaO/MgO, (K₂O+Na₂O+CaO)/Al₂O₃, K₂O/Na₂O, V/Zr, Co, the HHDB-017 profile has selected five geochemistry parameters, respectively is: (Na₂O+CaO+MgO)/Al₂O₃, SiO2/Al₂O₃, CaO/MgO, V/Zr, Ni, the HHDB-018 profile has selected four geochemistry parameters, respectively is: SiO2/(Al₂O₃+Fe₂O₃), (K₂O+Na₂O+CaO)/Al₂O₃, V/Zr, K₂O/Na₂O.The HHDB-016 experienced a "relatively cool and dry-relatively warm and wet-relatively cool and dry-relatively warm and wet" climate change process, the HHDB-017 experienced a "relatively cool and dry-relatively warm and wet-relatively cool and dry-relatively warm and wet-relatively cool and dry-relatively cool and dry" the climate change process, the HHDB-018 experienced a "relatively warm and wet-relatively cool and dry-relatively warm and wet" climate change process. the climate change of each profile have a good relationship with the sedimentary characteristics of each profile.