US-Ethiopia Coopertive Research: Geomagnetic Paleointensity Studies of Reversal Volcanic Sequences Recorded in the Central Afar Depression, Ethiopia

该奖项支持夏威夷大学马诺阿分校海洋与地球科学与技术学院的Emilio Herrero-Bervera博士和埃塞俄比亚亚的斯亚贝巴大学地质与地球物理系的Tesfaye Kidane博士开展的一项为期三年的合作研究项目。阿法尔三角位于红海、亚丁湾和埃塞俄比亚裂谷的交界处，最近经历了几次喷发，暴露出厚厚的熔岩流序列。非洲大陆较年轻（上新世-更新世）的岩浆流记录很少，这些熔岩流有可能提供这些逆转的详细记录。研究人员将在阿法尔坳陷中部的Gamarri剖面收集样本，以研究留尼汪倒转的古强度。他们还将研究同一剖面记录的奥杜瓦伊反转的磁地层学。这次合作结合了Herrero-Bervera博士在地磁方面的专业知识和Kidane博士对埃塞俄比亚火山的了解。结果有望提供详细的记录，确定留尼旺和奥杜瓦伊正常极性亚时的反转。这一新信息将对当前关于地质时期古强度的知识做出重大贡献。国际项目司和地球科学司共同为这个项目提供资金。

9906221Herrero-Bervera This award supports a three-year collaborative research project between Dr. Emilio Herrero-Bervera, of the School of Ocean and Earth Science and Technology at the University of Hawaii at Manoa, and Dr. Tesfaye Kidane, of the Department of Geology and Geophysics at the Addis Ababa University in Ethiopia.The Afar Triangle, which lies at the junction of the Red Sea, Gulf of Aden and Ethiopian rifts, has experienced some recent eruptions that have exposed thick sequences of lava flows. There are few available lava records of younger (Plio-Pleistocene) field reversals from the African continent, and these lava flows have the potential of providing detailed records of those reversals. The researchers will collect samples in the Gamarri section in the Central Afar Depression for their study of the paleointensity of the Reunion reversals. They will also study the magnetostratigraphy of the Olduvai reversal recorded in the same section. The collaboration combines Dr. Herrero-Bervera's expertise in geomagnetism with Dr. Kidane's understanding of the volcanics of Ethiopia.Results are expected to provide detailed records of the reversals that define the Reunion and Olduvai normal polarity subchrons. This new information will be a significant contribution to the current knowledge about paleointensity over geologic time.The Division of International Programs and the Division of Earth Sciences are jointly providing funding for this project.