应我校地质过程与成矿预测全国重点实验室、科学研究院刘金高教授邀请，丹麦哥本哈根大学Kristoffer Szilas来我校进行学术交流，并作学术报告。

时      间：2026年5月21日 9:30-10:30

地      点：逸夫楼901

报告题目：The Archean Geology of Greenland

报告人简介：Kristoffer Szilas，丹麦自然历史博物馆馆长。2012年获哥本哈根大学博士学位，2012-2018年先后在哥伦比亚大学、斯坦福大学和格陵兰地质调查局从事博士后研究，2018年至今任职于哥本哈根大学。他主要致力于探究格陵兰岛的地质演化过程，聚焦于格陵兰岛太古宙岩石的岩石学、矿物学与地球化学研究，旨在厘清格陵兰地区超镁铁-镁铁质岩石的成因，进而为早期地球构造演化模型提供约束。现为Geoscience Frontiers副主编，代表性论文发表在SA、NC、EPSL、GCA、JP、CG、GPL、CMP等国际著名学术期刊上。

报告简介：Fieldwork remains the cornerstone of geological research, providing the essential framework for reconstructing Earth’s earliest history through direct observation. However, in Archean cratons, polymetamorphic evolution, intense deformation, and pervasive metasomatism commonly overprint primary field relationships and profoundly modify geochemical signatures. These processes severely complicate interpretations of protoliths, depositional environments, biosignatures, and tectonic settings. The Eoarchean Itsaq Gneiss Complex of SW Greenland, including the Isua Supracrustal Belt, is widely cited as preserving Earth’s oldest sedimentary rocks, early evidence for life, and arc-like tectonic processes. Claims of stromatolites, conglomerates, and turbidites as primary sedimentary or biogenic features neglect the consequences of granulite-facies metamorphism, strong deformation, late-stage fluid–rock interaction, and repeated metasomatic modification. New structural observations, geochronological constraints, and metamorphic–metasomatic analyses demonstrate that many of these features require substantial reinterpretation. Beyond implications for early life, pervasive metamorphic and metasomatic modification also challenges prevailing models that invoke arc-like plate tectonic environments for the oldest supracrustal sequences. Thermodynamic modelling of magmatic systems, accounting explicitly for post-emplacement modification, instead supports hot, dry parental magmas consistent with elevated mantle potential temperatures, high crustal heat production, and vertical tectonic regimes during the early Archean.

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