Collaborative Research: Geochemical Consequences of Slab Breakoff and Lithospheric Delamination: Examples From Turkish Neo-Volcanic Zones

这个合作研究项目，由国际科学与工程办公室（OISE）和岩石学和地球化学计划的支持，解决了通过在土耳其安纳托利亚火山省熔化或物理沉没岩石圈去除的问题。去除下地壳或地幔岩石圈被调用来解释不同的地球物理和地貌观测在环地中海和其他地方，包括热流，地形和同造山伸展。建议与土耳其研究人员合作，获取关于碰撞后年轻原始基性熔岩的地球化学和同位素数据，以评估地球物理研究表明的岩石圈移动的化学影响。土耳其火山岩的同位素研究是非常有限的，尽管这些数据在解决软流圈和岩石圈源区的演变的效用。地球化学研究的重点是利用主元素和微量元素地球化学以及Sr-Nd-Pb-Hf同位素系统学来区分安纳托利亚火山区之下源区的岩石圈与软流圈+板片衍生成分。这项研究可直接应用于全球造山和造山后环境，以及以下研究：大陆演化，全球地球化学循环，对流软流圈地球化学非均匀性的发展，该项目通过与年轻科学家Kürkcüoglu和Alici Sen的强有力的国际合作伙伴关系，建立了土耳其地球化学的人力和物质资本。Hacettepe大学和矿物研究和勘探总局的MS实验室开发将提高其分析能力。

This collaborative research project, supported by the Office of International Science and Engineering (OISE) and the Petrology and Geochemistry program, addresses issues of lithospheric removal through melting or physical foundering in the Turkish Anatolian volcanic province. Removal of lower crust or mantle lithosphere is invoked to explain diverse geophysical and geomorphological observations in the circum-Mediterranean and elsewhere, including heat flow, topography and synorogenic extension. It is proposed to partner with Turkish researchers to obtain geochemical and isotopic data on young, post-collisional primitive mafic lavas to assess the chemical effects of lithospheric removal where it has been indicated by geophysical studies. Prior isotopic studies of Turkish volcanics are extremely limited despite the utility of these data in addressing the evolution of asthenospheric and lithospheric source regions. The geochemical study will focus on using major and trace element geochemistry and Sr-Nd-Pb-Hf isotopic systematics to discriminate lithospheric vs. asthenospheric + slab-derived components in the source regions beneath the Anatolian volcanic region. This research has immediate application to orogenic and post-orogenic environments worldwide, as well as to studies of: continental evolution, global geochemical cycling, development of geochemical heterogeneities in the convecting asthenosphere, and lithospheric removal in extensional environments.This project builds the human and material capital of Turkish geochemistry through a strong international partnership with young scientists Kürkcüoglu and Alici Sen. ICP-MS lab development at Hacettepe University and the General Directorate of Mineral Research and Exploration will improve their analytical capabilities.