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

这个由国际科学与工程办公室（OISE）和岩石学与地球化学项目支持的合作研究项目，解决了在土耳其安纳托利亚火山省通过融化或物理沉降来清除岩石圈的问题。下地壳或地幔岩石圈的移动被用来解释地中海周围和其他地方的各种地球物理和地貌观测，包括热流、地形和造陆伸展。建议与土耳其研究人员合作，获取年轻的、碰撞后的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除的化学影响。尽管这些数据在解决软流圈和岩石圈源区的演化方面具有实用价值，但先前对土耳其火山的同位素研究非常有限。地球化学研究将重点利用主微量元素地球化学和Sr-Nd-Pb-Hf同位素系统来区分安纳托利亚火山区源区岩石圈与软流圈+板源组分。本研究对世界范围内的造山带和造山带后环境具有直接的应用价值，对大陆演化、全球地球化学循环、对流软流圈地球化学非均质性发育、伸展环境下岩石圈移动等研究具有直接的应用价值。该项目通过与年轻科学家k<s:1> rkc<e:1> oglu和Alici sen建立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ICP-MS实验室的发展和矿产研究与勘探总局将提高他们的分析能力。

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.