名家论坛（2015-12）：Antonio Simonetti博士学术报告

应地质过程与矿产资源国家重点实验室、紧缺矿产资源勘查协同创新中心、资源学院蒋少涌教授邀请，美国Notre Dame大学环境工程与地球科学系Antonio Simonetti博士来我校进行学术交流和访问。

报告题目：Carbonatites: Chemical and Isotopic Messengers of the Upper Mantle

报告时间：2015年10月22日上午11点

报告地点：八角楼报告厅

报告摘要：

Although considered ‘exotic’ in nature, carbonatite melts have a profound impact on the chemical and physical properties of the mantle, such as their influence on partial melting processes, which control the distribution/budget of incompatible trace elements and volatiles, rheological and geophysical properties, and metasomatism of the continental lithosphere. The origin of carbonatite melt has been linked to metasomatized upper mantle sources and related to mantle plume involvement. However, the exact origin of the carbon within mantle-derived carbonatite, whether derived from lithosphere or asthenosphere, is still under debate. Hence, a review of the stable (C, O) and radiogenic (Sr, Nd, Hf, Pb) isotope ratios for carbonatites worldwide of varying ages will be presented, and for the first time, boron (B) isotope compositions. It is well documented that the global boron geochemical cycle is closely tied to the recycling of geological material via subduction processes. Therefore, B isotope compositions may aid in testing for a recycled component present in carbonatite magmas, and provide a unique way of assessing their mantle sources.

Antonio Simonetti博士简介：

Simonetti博士主要从事地幔地球化学和分析地球化学方面的研究工作。1994年获得加拿大Carleton大学博士学位，曾在Carleton大学、Quebec at Montreal大学和德国马普化学所从事博士后研究，现为Notre Dame大学Associate Professor。Lithos杂志副主编。在Nature Communications、Geology、GCA、EPSL等国际一流杂志上发表了120多篇论文，论文他引2484次，H-因子为30。

地质过程与矿产资源国家重点实验室

紧缺矿产资源勘查协同创新中心

资源学院

2015-10-19