The Carbon Isotopic Equilibrium Method of Evaluating the Biogasgenerated Quantity and the Generation Period: its application
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摘要: 通过对属都湖湖心钻取的短岩芯Esdr1进行放射性核素137Cs和常规的元素分析,利用137Cs建立精确的年代标尺,开展地球化学记录环境演变与器测资料的对比研究。器测资料表明,近50年来,该地区主要的气候变化特征:1958~1983年,气候偏冷湿;1983~2002年,气候逐渐暖干化,这些气候波动特征被沉积岩芯忠实记录。研究表明属都湖沉积物地球化学代用指标指示的气候演化特征与器测资料可很好的对比印证,属都湖沉积岩芯完整的记录了区域气候变化的信息
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关键词:
- 湖泊沉积地化指标环境演变器测资料
Abstract: A short sediment core Esdr1 from Shudu lake has been analysed of geochemistry elements and radionuclides. Accurate sediment chronology was established by 137Cs. Meteorological observation records reveal that climate changes experience two stages during past 44 years in the region of Shudu: a cold/wet stage during 1958~1983 a B.P, a warm/dry stage between 1983 and 2002. Climate changes reconstructed by Esdr1 core geochemical proxies are consistent with Meteorological observation records. Sediment in Shudu Hai documented in detail Regional climate changes and human activities which mean that the sediment from this lake could be the suitable archive for environment changes reconstruction in this region.-
Key words:
- lake sediments
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