Collaborative Research: Magmatism of the Baikal Rift, USSR:Asthenospheric Upwelling Along a Lithospheric Boundary

我们建议通过集中分析目前手头的150个样本来推进贝加尔湖项目。在1990-91年经费的支持下，没有计划前往苏联旅行。如果我们的分析工作结果需要额外的实地研究和收集，我们将根据这些结果制定新的建议。该项目的SMU部分将侧重于获得K-Ar日期和矿物化学。新的日期是必不可少的，因为我们打算在一个时空框架中评估熔岩的地球化学变化。我们发现苏联的日期是完全不可靠的。我将签订大约20个日期的全岩玄武岩样本合同。由于整个岩石的地球化学和同位素分析将在华盛顿大学进行，因此矿物化学工作在新大进行是合适的。我将对斑晶，异晶和捕虏体进行微探针分析。预算包括前往圣路易斯的旅费，以便我们在样本表征阶段后聚在一起，整合我们的数据，并对结果进行解释。我们正在同谢尔盖·拉斯卡佐夫博士合作，他应邀于1990年后期在鲁尔和鲍林实验室呆了一个月，以便保持项目势头和促进合作。

We propose to advance the Baikal project by concentrating on characterization of the 150 samples currently in hand. No travel to the USSR is planned under the aegis of 1990-91 funding. If results of our analytical work warrant additional field studies and collecting, we will formulate a new proposal based on these results. The SMU portion of the project will focus on obtaining K-Ar dates, and on mineral chemistry. The new dates are essential, because we intend to evaluate the geochemical variations among lavas in a temporal-spatial framework. We have found the Soviet dates to be completely unreliable. I will contract for approximately 20 dates on whole-rock basalt samples. As the whole-rock geochemistry and isotopic analyses will be done at Washington University, it is appropriate that the mineral chemistry work be done at SMU. I will perform microprobe analyses of phenocrysts, xenocrysts, and xenoliths. The budget includes funds for travel to St. Louis in order to allow us to get together after the sample characterization phase, integrate our data, and arrive at interpretations of the results. Dr. Sergey Rasskazov, with whom we are collaborating, has been invited to spend a month in the laboratories of Luhr and Bowring during late 1990 in order to maintain project momentum and facilitate cooperation.