Renowned diamond explorer and scholar Graham Pearson has made significant contributions to the field of mantle geology and mineralogy, leading to the recent naming of a newly-discovered mineral in his honor. The International Mineralogical Association officially approved the name “Grahampearsonite” for this mineral, which was unearthed inside a deep-Earth diamond found in Brazil.
Pearson, a mantle geochemist at the University of Alberta in Edmonton, has dedicated decades to studying diamonds and their insights into the Earth’s deep interior. His extensive research in Brazil, dating back over ten years, has been instrumental in elucidating the composition and water content of the Earth’s deep mantle through the examination of deep-mine diamonds.
Describing the honor of having a mineral named after him as “very humbling,” Pearson emphasized the lasting impact of scientific work and expressed gratitude for this recognition. The mineral Grahampearsonite was identified within a diamond that formed at depths exceeding 300 kilometers below the Earth’s surface in Brazil’s Juina region. Its chemical composition consists of calcium, phosphorus, and oxygen.
Initially known as a synthetic material, Grahampearsonite, also known as calcium pyrophosphate, was previously produced in laboratory settings. However, its natural occurrence within a diamond marked a significant discovery. Through X-ray analysis, researchers observed the mineral’s distinctive crystal structure while it remained enclosed within the diamond.
The mineral was officially named Grahampearsonite in December by an international research group as a tribute to Pearson’s exceptional contributions to diamond research. Pearson, a pioneer in the field, has not only delved into the history of the Earth’s mantle but has also developed innovative techniques for geochemical analysis and geological sample dating.
Hailing from an English mining town, Pearson’s fascination with diamonds was sparked during his doctoral studies, where he explored the deep Earth realm. His relocation to Canada in 2010 led to the establishment of the renowned Arctic Resources Geochemistry Laboratory, where he continues his research on minerals and diamonds in the Arctic region.
Pearson emphasized the significance of ongoing mineral discoveries, highlighting the importance of understanding the applications and significance of these naturally occurring minerals. He underscored the unique properties of diamonds, such as their ability to encapsulate high pressures and offer insights into plate tectonics cycles, beyond their visual appeal.
Advancements in microscope technology have facilitated the identification of new minerals, bringing humanity closer to uncovering the full spectrum of Earth’s mineral diversity. With approximately 4,800 minerals discovered to date and an estimated 4,000 more awaiting discovery, Pearson remains at the forefront of diamond research, unraveling the mysteries hidden within these precious gems.