Angus Fitzpayne


Australia

I am a PhD candidate from the KiDs (Kimberlites and Diamonds) research group at the University of Melbourne. Our research group focusses on the study of mantle processes, diamond formation and preservation, and the petrogenesis of kimberlites and related rocks. My own research involves the study of a group of mantle rocks that display evidence of intense mantle metasomatism, in order to understand their petrogenesis and their possible involvement in the formation of continental alkaline magmas.

Why are you excited about participating in IMA2018?
I am excited to be given the opportunity to organise this session, not least in order to meet and gain insights from fellow Earth Scientists who share my research interests. The IMA also provides a wonderful opportunity to bring together scientists from academic and industry-based backgrounds.


Session: Mantle xenoliths, Kimberlites and related Magmas: The Diamond Trilogy

Kimberlites, lamproites and other intraplate alkaline magmas are important for constraining the composition and evolution of the deep mantle through time as well as for understanding their relationships to the diamonds entrained by many of these intrusions. The host magmas also entrain a diverse suite of mantle rocks, which provide the means to study the composition of the deep Earth and the effects of fluid migration in the mantle. Fluid-induced mantle metasomatism appears to be a necessary precursor to the genesis of alkaline magmas such as lamproites; however, the nature of this relationship remains poorly constrained. Furthermore, metasomatism may cause diamond crystallisation and/or destruction, which remains a poorly understood aspect of diamond geology.
The proposed session will highlight the latest advances in our understanding of the genesis of intraplate alkaline magmas and their mantle source rocks, as well as the formation/preservation of diamonds. We welcome contributions that examine the mineralogy, petrology and geochemistry (including stable and radiogenic isotopes) of kimberlites, lamproites, ultramafic lamprophyres, carbonatites, alkali basalts and related rocks, and the mantle xenoliths they entrain. We also invite studies that explore the composition of solid and fluid inclusions in diamonds or other mantle minerals.”