对新疆孔雀河北岸LX02剖面湖相沉积物开展光释光和粘土矿物样品X射线衍射分析,根据样品中的粘土矿物成分及质量分数对本区古气候演化进行了探讨.结果显示,该剖面湖相沉积自72 ka BP延续到51 ka BP.这期间,研究区粘土矿物以伊利石占绝对...对新疆孔雀河北岸LX02剖面湖相沉积物开展光释光和粘土矿物样品X射线衍射分析,根据样品中的粘土矿物成分及质量分数对本区古气候演化进行了探讨.结果显示,该剖面湖相沉积自72 ka BP延续到51 ka BP.这期间,研究区粘土矿物以伊利石占绝对优势（56%-64%,平均为61%）,其它粘土矿物有绿泥石（18%-26%,平均为22%）、高岭石（7%-12%,平均为8%）和伊/蒙混层（5%-15%,平均为9%）,这与塔里木盆地粘土矿物组成颇为一致.具体来说,72.4—66.8 ka BP,伊利石和绿泥石含量之和较高,同时绿泥石含量较高,对于高岭石而言,除了一个样品外,其它样品的平均值较低,伊/蒙混层含量较低,指示该时段为冷干气候环境;66.8—56.1 ka BP,伊利石和绿泥石含量之和最低,同时绿泥石含量亦最低,高岭石、伊/蒙混层含量较高,指示该时段为暖湿气候环境;56.1—51.0 ka BP,伊利石和绿泥石含量之和增大,同时绿泥石含量亦增大,高岭石、伊/蒙混层含量较低,指示该时段为较冷干气候环境.这与孢粉植物群、地球化学元素含量及其主成分F1和粒度、色度及碳酸盐主成分F1＇所反映的古气候特征及其变化一致,亦与柴达木盆地东部介形类丰度特征研究、柴达木盆地东部古湖泊高湖面光释光年代学研究、北京平原区有机碳同位素研究等结果吻合较好.研究表明塔里木盆地东部晚更新世气候仍以暖湿-冷干气候变化模式为主.展开更多
通过对新疆孔雀河北岸LX02剖面湖相沉积物开展光释光和地球化学测试分析,重建了研究区72~51 ka BP的气候变化过程。72.4~66.8 ka BP期间,Al、K、Ti、Fe、Ca、Mg元素含量和烧失量低,Fe/Mn、Rb/Sr、(Fe+A1+Mn)/(K^+Ca+Mg)、CIA、C值低,而S...通过对新疆孔雀河北岸LX02剖面湖相沉积物开展光释光和地球化学测试分析,重建了研究区72~51 ka BP的气候变化过程。72.4~66.8 ka BP期间,Al、K、Ti、Fe、Ca、Mg元素含量和烧失量低,Fe/Mn、Rb/Sr、(Fe+A1+Mn)/(K^+Ca+Mg)、CIA、C值低,而Sa、Saf值高,指示该时段为冷干气候环境;66.8~56.1 ka BP期间,Al、K、Ti、Fe、Ca、Mg元素含量和烧失量均增加,Fe/Mn、Rb/Sr、(Fe+A1+Mn)/(K^+Ca+Mg)、CIA、C值明显增加,而Sa、Saf值明显降低,指示该时段为暖湿气候环境;56.1~51.0 ka BP期间,Al、K、Ti、Fe、Mg元素含量和烧失量均减少,Fe/Mn、Rb/Sr、(Fe+A1+Mn)/(K^+Ca+Mg)、CIA、C值略有降低,而Sa、Saf值明显增加,指示该时段为较冷干气候环境。这与粘土矿物特征所反映的古气候特征及其变化一致,亦与柴达木盆地东部介形类丰度特征研究、柴达木盆地东部古湖泊高湖面光释光年代学研究、北京平原区有机碳同位素研究等结果吻合较好。研究表明塔里木盆地东部晚更新世气候仍以暖湿-冷干气候变化模式为主,但这一气候变化规律的内部驱动机制还有待进一步深入研究。展开更多
The Dai nationality, with a population of 1,025,128, mainly reside in Xishuangbanna Dai Nationality Autonomous Prefecture, Dehong Dai and Jingpo Nationalities Autonomous Prefecture, and 30 counties and cities such as ...The Dai nationality, with a population of 1,025,128, mainly reside in Xishuangbanna Dai Nationality Autonomous Prefecture, Dehong Dai and Jingpo Nationalities Autonomous Prefecture, and 30 counties and cities such as Gengma and Menglian in Yunnan Province.The Dai nationality has its own written language. The 1,000-year Dai documents, including Buddhist Scriptures on Pattra and the famous Dai calendar, prove that the Dai nationality has long cultural history. The Dai narrative poem, Zhaoshutun and Nanmunuona (a legend about a prince and a peacock princess) and the medical classic entitled Traditional Dai Medicine, are important to the precious Chinese cultural heritage. The Dais celebrate the Water-sprinkling Festival every April.The Dais tend to settle along rivers. The ever-green Dai area has a subtropical climate with thick forests. The plentiful rainfall and the fertile soil are favorable to farming.Xishuangbanna Prefecture, dubbed as the 'Kingdom of plants' and 'Kingdom of animals', has a variety of plants and animals. Now, it has become the second largest rubber production base in China. In addition, the area is rich in rice, corn and tea.展开更多
文摘对新疆孔雀河北岸LX02剖面湖相沉积物开展光释光和粘土矿物样品X射线衍射分析,根据样品中的粘土矿物成分及质量分数对本区古气候演化进行了探讨.结果显示,该剖面湖相沉积自72 ka BP延续到51 ka BP.这期间,研究区粘土矿物以伊利石占绝对优势（56%-64%,平均为61%）,其它粘土矿物有绿泥石（18%-26%,平均为22%）、高岭石（7%-12%,平均为8%）和伊/蒙混层（5%-15%,平均为9%）,这与塔里木盆地粘土矿物组成颇为一致.具体来说,72.4—66.8 ka BP,伊利石和绿泥石含量之和较高,同时绿泥石含量较高,对于高岭石而言,除了一个样品外,其它样品的平均值较低,伊/蒙混层含量较低,指示该时段为冷干气候环境;66.8—56.1 ka BP,伊利石和绿泥石含量之和最低,同时绿泥石含量亦最低,高岭石、伊/蒙混层含量较高,指示该时段为暖湿气候环境;56.1—51.0 ka BP,伊利石和绿泥石含量之和增大,同时绿泥石含量亦增大,高岭石、伊/蒙混层含量较低,指示该时段为较冷干气候环境.这与孢粉植物群、地球化学元素含量及其主成分F1和粒度、色度及碳酸盐主成分F1＇所反映的古气候特征及其变化一致,亦与柴达木盆地东部介形类丰度特征研究、柴达木盆地东部古湖泊高湖面光释光年代学研究、北京平原区有机碳同位素研究等结果吻合较好.研究表明塔里木盆地东部晚更新世气候仍以暖湿-冷干气候变化模式为主.
文摘通过对新疆孔雀河北岸LX02剖面湖相沉积物开展光释光和地球化学测试分析,重建了研究区72~51 ka BP的气候变化过程。72.4~66.8 ka BP期间,Al、K、Ti、Fe、Ca、Mg元素含量和烧失量低,Fe/Mn、Rb/Sr、(Fe+A1+Mn)/(K^+Ca+Mg)、CIA、C值低,而Sa、Saf值高,指示该时段为冷干气候环境;66.8~56.1 ka BP期间,Al、K、Ti、Fe、Ca、Mg元素含量和烧失量均增加,Fe/Mn、Rb/Sr、(Fe+A1+Mn)/(K^+Ca+Mg)、CIA、C值明显增加,而Sa、Saf值明显降低,指示该时段为暖湿气候环境;56.1~51.0 ka BP期间,Al、K、Ti、Fe、Mg元素含量和烧失量均减少,Fe/Mn、Rb/Sr、(Fe+A1+Mn)/(K^+Ca+Mg)、CIA、C值略有降低,而Sa、Saf值明显增加,指示该时段为较冷干气候环境。这与粘土矿物特征所反映的古气候特征及其变化一致,亦与柴达木盆地东部介形类丰度特征研究、柴达木盆地东部古湖泊高湖面光释光年代学研究、北京平原区有机碳同位素研究等结果吻合较好。研究表明塔里木盆地东部晚更新世气候仍以暖湿-冷干气候变化模式为主,但这一气候变化规律的内部驱动机制还有待进一步深入研究。
文摘The Dai nationality, with a population of 1,025,128, mainly reside in Xishuangbanna Dai Nationality Autonomous Prefecture, Dehong Dai and Jingpo Nationalities Autonomous Prefecture, and 30 counties and cities such as Gengma and Menglian in Yunnan Province.The Dai nationality has its own written language. The 1,000-year Dai documents, including Buddhist Scriptures on Pattra and the famous Dai calendar, prove that the Dai nationality has long cultural history. The Dai narrative poem, Zhaoshutun and Nanmunuona (a legend about a prince and a peacock princess) and the medical classic entitled Traditional Dai Medicine, are important to the precious Chinese cultural heritage. The Dais celebrate the Water-sprinkling Festival every April.The Dais tend to settle along rivers. The ever-green Dai area has a subtropical climate with thick forests. The plentiful rainfall and the fertile soil are favorable to farming.Xishuangbanna Prefecture, dubbed as the 'Kingdom of plants' and 'Kingdom of animals', has a variety of plants and animals. Now, it has become the second largest rubber production base in China. In addition, the area is rich in rice, corn and tea.
