Tourmaline composition and boron isotope signature as a tracer of magmatic-hydrothermal processes
Kun-Feng Qiu, Hao-Cheng Yu, Callum Hetherington, Ya-Qi Huang, Tao Yang, and Jun Deng

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Deformation and strength of mantle relevant garnets: Implications for the subduction of basaltic-rich crust
Cara E. Vennari, Feng Lin, Martin Kunz, Masaki Akaogi, Lowell Miyagi, and Quentin Williams

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Ultra-reduced phases in ophiolites cannot come from Earth’s mantle
Chris Ballhaus, Hassan M. Helmy, Rául O.C. Fonseca, Richard Wirth, Anja Schreiber, and Niels Jöns

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Olivine from aillikites in the Tarim large igneous province as a window into mantle metasomatism and multi-stage magma evolution
Changhong Wang, Zhaochong Zhang, Qiuhong Xie, Zhiguo Cheng, Weiliang Kong, Bingxiang Liu, M. Santosh, and Shengkai Jin

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Precise determination of the effect of temperature on the density of solid and liquid iron, nickel, and tin
Asaka Kamiya, Hidenori Terasaki, and Tadashi Kondo

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Timescales of crystal mush mobilization in the Bárðarbunga- Veiðivötn volcanic system based on olivine diffusion chronometry
Alberto Caracciolo, Maren Kahl, Enikő Bali, Guðmundur H. Guðfinnsson, Sæmundur A. Halldórsson, and Margaret E. Hartley

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Chemical reactions in the Fe₂SiO₄-D₂ system with a variable deuterium content at 7.5 GPa
Vadim S. Efimchenko, Nicolay V. Barkovskii, Vladimir K. Fedotov, Konstantin P. Meletov, and Artem V. Prokoshin

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High-pressure syntheses and crystal structure analyses of a new low-density CaFe₂O₄-related and CaTi₂O₄-type MgAl₂O₄ phases
Takayuki Ishii, Giacomo Criniti, Elena Bykova, Leonid Dubrovinsky, Tomoo Katsura, Hidekazu Arii, Hiroshi Kojitani, and Masaki Akaogi

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Phase diagram and thermal expansion of orthopyroxene-, clinopyroxene-, and ilmenite-structured MgGeO₃
Simon A. Hunt, James R. Santangeli, David P. Dobson, and Ian G. Wood

Mass transfer associated with chloritization in the hydrothermal alteration process of granitic pluton
Takashi Yuguchi, Takanobu Matsuki, Yuya Izumino, Eiji Sasao, and Tadao Nishiyama

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Nonlinear effects of hydration on high-pressure sound velocities of rhyolitic glasses
Jesse T. Gu, Suyu Fu, James E. Gardner, Shigeru Yamashita, Takuo Okuchi, and Jung-Fu Lin

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Crystal chemistry and high-temperature vibrational spectra of humite and norbergite: Fluorine and titanium in humite-group minerals
Dan Liu, Sarah M. Hirner, Joseph R. Smyth, Junfeng Zhang, Xiaochao Shi, Xiang Wang, Xi Zhu, and Yu Ye

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Exomorphism of jacobsite precipitates in bixbyite single crystals from the Thomas Range in Utah
Johannes Peter, Maximilian Trapp, Stefan Lauterbach, Philipp Gollé-Leidreiter, Ute Kolb, and Hans-Joachim Kleebe

Ferropyrosmalite-bearing fluid inclusions in the North Patagonian Andes metasedimentary basement, Argentina: A record of regional metasomatism
Graciela Sosa, Sebastián Oriolo, Alfons van den Kerkhof, Pablo Diego González, Ezequiel Olaizola, and Florencia Bechis

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Memorial of Alden Bliss Carpenter (1936–2019)
Edward S. Grew

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