U.S.-Bulgaria Cooperative Research: A Novel Approach to Milliprobing Mossbauer Studies of Geologic Samples : Olivine Crystals with Fe-Bearing Precipitates

这是一个美国-保加利亚的合作研究项目，重点是开发一种新的穆斯堡尔光谱技术，以提高小样本的信号质量，并应用于研究橄榄石中的出溶相。 主要研究人员是来自滨江的加州大学的Larissa Dobrzhinetskaya和Harry绿色，以及保加利亚核研究与核能研究所的Todor Ruskov。 这项工作将有助于确定这些矿物的起源和地幔的氧逸度，这两者目前都没有得到很好的限制。拟议的活动所产生的更广泛的影响是增加了测量小样品穆斯堡尔谱的设施。 这个地球科学研究项目的目的是在平等、互惠和互利的基础上，将美国和中东欧的顶尖专家聚集在一起，在相互感兴趣和有能力的领域，将联合收割机互补的努力和能力结合起来。

This is a U.S.-Bulgarian cooperative research project that focuses on developing a new Mossbauer spectrometry technique to improve signal quality for small samples, with application to the study of exsolved phases in olivine. The principal investigators are Larissa Dobrzhinetskaya and Harry Green from the University of California at Riverside and Todor Ruskov from the Institute for Nuclear Research and Nuclear Energy in Bulgaria.The proposed technique will improve our ability to measure the oxidation state of iron on very small samples with a focus on determining the oxidation state of mantle minerals exhumed from very deep depths. This work will help determine the origin of these minerals and the mantle's oxygen fugacity, both of which are poorly constrained at present.The broader impact resulting from the proposed activity is enhanced access to facilities for measuring Mossbauer spectra of small samples. Such a facility has numerous applications beyond the geosciences and will foster interdisciplinary cooperation.This project in earth sciences research fulfills the program objectives of bringing together leading experts in the U.S. and Central/Eastern Europe to combine complementary efforts and capabilities in areas of strong mutual interest and competence on the basis of equality, reciprocity, and mutuality of benefit.