Luminescence-based optical or SEM images are increasingly used in Earth sciences research. Examples include formation and post-growth history of minerals from their internal textures, taking into account multiple interior regions of complex crystals. For such simple approaches it is actually unnecessary to understand the particular causes of emissions. During the last decade, however, spectroscopic research has led to substantial progress in our understanding of the emissions of minerals. The main objective of this issue is to convince readers that luminescence is not at all restricted to interesting pictures that show “something,” but analysis of the emissions may bear a wealth of information on what exactly is observed. Luminescence spectroscopy has become a versatile, quantitative group of techniques whose successful applications virtually cover all geoscientific sub-disciplines.

• Luminescence: The “Cold Glow” of Minerals
• Activators in Minerals and the Role of Electronic Defects
• Luminescence Images: What is it That You See?
• Luminescence Applications in Petrology
• Analysing the Luminescence of Gems
• Luminescence Applications in Ore Geology, Mining, and Industry

Zeiss

Excalibur Mineral Corporation

HIMALAYAN LEUCOGRANITES

Guest Editors: Fang-Zhen Teng (University of Washington, USA), Fu-Yuan Wu (Institute of Geology and Geophysics, Chinese Academy of Sciences, China)

Himalayan leucogranites crop out intermittently over 2000 km along the Himalayan crest in the Himalayan-Tibetan plateau. They constitute some of the most well-studied granites in the world. They are considered to be purely crustal-derived melts and indicators of collisional orogenesis, and have greatly improved our general understanding of crustal anatexis, differentiation of felsic magmas, and tectonic evolution of the Himalayan-Tibetan Orogen. They provide a rare opportunity to explore the feedback relationships among geodynamics, tectonics, and magmatism in a classic continental collisional context. In this issue, we will describe our current understanding of the petrogenesis and significance of the Himalayan leucogranites by focusing on their tectonic and geodynamic background, source rocks, petrology, geochemistry, and links to orogenesis and economic resources. This issue will not only summarize the state-of-the-art research on leucogranites but also present an example of how a multidisciplinary approach can be used to constrain the petrogenesis of granites and the associated mineralization and orogenic evolution

•  Himalayan Leucogranites: Petrogenesis and Significance Fang-Zhen Teng (University of Washington, USA) and Fu-Yuan Wu (Institute of Geology and Geophysics, Chinese Academy of Sciences, China)
•  Himalayan Leucogranites: Field Relationships and Tectonics Mike Searle (University of Oxford, UK) and John Cottle (University of California, Santa Barbara, USA)
•  Himalayan Leucogranites: A Minimal Role in Deformation Matt Kohn (Boise State University, USA), Sean P. Long (Washington State University, USA), and T. Mark Harrison (University of California, Los Angeles, USA)
•  Himalayan Leucogranites: An Experimental Petrology Perspective Bruno Scaillet (Orleans University, France) and Michel Pichavant (Orleans University, France)
•  Himalayan Leucogranites: A Geochemical Perspective Ze-Zhou Wang (University of Washington, Seattle, USA), Fang-Zhen Teng (University of Washington, Seattle, USA), Lingsen Zeng (Institute of Geology, Chinese Academy of Geological Sciences, China), and Zhi-Chao Liu (Sun Yat-sen University, China)
•  Himalayan Leucogranites: Rare-metal Resources Fu-Yuan Wu (Institute of Geology and Geophysics, Chinese Academy of Sciences, China), Xiao-Chi Liu (Institute of Geology and Geophysics, Chinese Academy of Sciences, China), Fang-Yang Hu (Institute of Geology and Geophysics, Chinese Academy of Sciences, China), Lei Xie (Nanjing University, China), and Ru-Cheng Wang (Nanjing University, China)

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• Extraterrestrial Organic Matter (February 2024)
  
• Paired Metamorphic Belts of SW Japan: Metamorphic Records of a Subduction System (April 2024)
  
• Cratons to Continents (June 2024)
  
• The Invisible Ocean: Hydrogen in the Deep Earth (August 2024)
  
• Behind and Beyond Luminescence Imaging (October 2024)
  
• Himalayan Leucogranites (December 2024)