Collaborative Research: The Boron Budget in High-Grade Pelitic Metamorphic Rocks: How, When and Where Does the Boron Go?

9526403 Growth这项拟议的研究是为了研究某些硼载体的矿物学和岩石学，以评估它们在高级变质作用、混合作用和深成作用期间对硼行为的作用。要研究的载体包括电气石、白云母、硅线石、Kornerupine、花岗闪锌矿和缅因州西部变闪长岩中的辉石矿。将特别强调评估水溶液和深熔熔体在去除电气石破裂释放的硼方面的作用。主要元素组成用电子探针测定，Fe2和Fe3用穆斯堡尔谱测定，大块样品用铀萃取法测定，H用15N反应分带，块体和显微B、Li、F用离子探针测定。这项研究的结果将提供对高级变质作用期间B预算的详细了解，并为结晶地体的形成过程提供重要的见解。

9526403 Grew The proposed research is to study the mineralogy and petrology of certain carriers of boron in order to assess their role in the behavior of boron during high-grade metamorphism, migmatism and anatexis. The carriers to be studied include tourmaline, muscovite, sillimanite, kornerupine, grandidierite, and werdingite in metapelites in Western Maine. Special emphasis will be on assessing the role of aqueous fluid and anatectic melt in removing boron released by tourmaline breakdown. major element compositions will be determined by electron microprobe, Fe+2 and Fe+3 by Mossbauer spectroscopy, H in bulk samples by uranium extraction, H zoning by 15N reaction, bulk and microscopic B, Li and F microscopic measurements by ion microprobe. Results from this study will provide a detailed understanding of the B budget during high-grade metamorphism and provide important insights into the processes by which crystalline terranes are formed.