Fluvial Geochemistry of the Arctic Rivers of Eastern Siberia

东西伯利亚北极河流的河流地球化学

• 批准号: 9814903
• 负责人: John Edmond
• 金额: --
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-01-15 至 2001-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9814903&HistoricalAwards=false
• 关键词: Fluvial; Geochemistry; Arctic; Rivers; Eastern

9814903EdmondThis proposal requests support to continue long-term investigations of the fluvial geochemistry of the large pristine rivers in the Russian Far East, east of Lake Baikal. The objective is a comparative study, using existing results from the Tropics and this survey, on the influence of climate on weathering rates, specifically the C02 consumption rates by aluminosilicate degradation, OC02 in moles/kM2/yr. None is found! Since all models of paleo-climate on geological time-scales assume a very strong relationship, -x IO over the -30'C range examined (only summer temperatures included), the results are dramatic and unexpected and therefore controversial. It is proposed to continue this work in the Amur, a relatively uncontaminated Temperate river, on remote streams in the Far East that drain its extremes, including the Kamchatka Peninsula and the high Arctic, and on the headwaters of the Olekma and Vitim (major right-bank tributaries of the Lena) that have sources in the Trans-Baikal Highlands east and south of Lake Baikal and may provide the closest analogues to the basement terrains already sampled at Tropical latitudes in the Amazon, Orinoco and Congo and to eroded Iiimalayan-type collision zones. The parallel program on minor and trace element geochemistry will continue. The studies of the geochemistry and petrology of the river sands will be carried on by collaborators at no cost to this proposal; water, suspended and bed load samples will be distributed to qualified investigators in the US and overseas in the usual manner

9814903埃德蒙兹该提案要求支持继续对俄罗斯远东贝加尔湖以东的大型原始河流的河流地球化学进行长期调查。 目的是利用热带地区和本次调查的现有结果，对气候对风化速率的影响进行比较研究，特别是铝硅酸盐降解的CO2消耗速率，OCO 2单位为摩尔/千米2/年。 页面没有找到！ 由于所有地质时间尺度上的古气候模型都假设了一个非常强的关系，在-30 ℃范围内（只包括夏季温度），-x IO，结果是戏剧性的和意想不到的，因此有争议。 建议在阿穆尔河（一条相对未受污染的温带河流）和远东偏远河流（包括堪察加半岛和北极高纬度地区）继续开展这项工作，在奥莱克马河和维蒂姆河的源头（主要的右河支流），有来源于跨，贝加尔湖东部和南部的贝加尔高原，可能提供最接近的类似物，基底地形已经采样在热带纬度的亚马逊，奥里诺科河和刚果和侵蚀Iimalayan型碰撞区。 关于次要和微量元素地球化学的平行方案将继续进行。 河沙的地球化学和岩石学研究将由合作者免费进行;水、悬浮物和推移质样品将以通常的方式分发给美国和海外的合格调查人员