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Thin Section Thursday! Image & caption by Nylah Wilson, UG student at James Madison University. Anorthosite primarily formed of plagioclase with albite and carlsbad twinning, olivine, and interstitial clinopyroxene. #thinsectionthursday #anorthosite #plagioclase

American Mineralogist: Melt infiltration and redox heterogeneity in the upper mantle: Evidence from Fe-FeO-Fe3C assemblages in Luobusa chromitite (Southern Tibet) Fahui Xiong, et al. doi.org/10.2138/am-2...

American Mineralogist: Hydrogen incorporation in orthopyroxene from Southern Patagonian mantle xenoliths: The role of cooling upon emplacement Alexandra Demers-Roberge, Michael C. Jollands, Othmar Müntener doi.org/10.2138/am-2...

Mineral Monday: Santafeite: The only mineral named after a railroad By John Rakovan With a chemical formula of (Na,Ca,Sr)12(Mn2+,Fe3+,Al,Mg)8Mn4+8(VO4)16(OH,O)20 · 8H2O, it was first discovered in Grants, New Mexico USA. #MSACommunications #MineralMonday #railroad #vanadate

American Mineralogist: Determination of fluorine concentration in topaz using Raman spectroscopy Anselm Loges, Shilei Qiao, Xin Zhong, Jeremy Fuller, Timm John The method has the added advantages of being non-destructive and permitting high spatial resolution. #topaz doi.org/10.2138/am-2...

Note the upcoming GSA session of interest. Abstract deadline is Aug. 6.

Thin Section Thursday! Image & caption: Nicole Mueller, UG student at James Madison University. Dhofar 287 is a lunar mare basalt meteorite. Note orthopyroxene (white crystals) and plagioclase (dark crystals) and clinopyroxene (the bright crystals). #thinsectionthursday #lunarmeteorite

American Mineralogist: Impact-induced nano-sized rare mineral kuratite with correlated disorder on near and far sides of the Moon using 3DED method Yiping Yang, et al. kuratite: [ideal formula Ca2Fe2+ 5 TiSi,Al 6O20] doi.org/10.2138/am-2...

American Mineralogist: Dislocation density as a differential stress indicator in coesite and quartz: TEM constraints from shear experiments Jinyu Zheng, et al. shear-deformed coesite and quartz show similarities to coesite and its retrograde quartz found in natural rocks. doi.org/10.2138/am-2...

No #MineralMonday today. Without contributions from people like you, I have nothing to post. Would you like to feature your research, field photos, a neat mineral, a recent publication? Please send information and up to 4 images to akoziol1 at udayton dot edu.

July American Mineralogist: Colomeraite, NaTi3+Si2O6, a new clinopyroxene mineral from the Colomera iron meteorite Chi Ma and Alan E. Rubin Colomeraite is a new, high-temperature member of the jadeite subgroup under the pyroxene group. doi.org/10.2138/am-2...

Thin Section Thursday! Contributed by Sean Arthur, UG student at James Madison University. Garnet–wollastonite skarn. Isotropic garnet (black in XPL) contrasts sharply with high-order interference colors of wollastonite. #thinsectionthursday #ThinSectionThursday #Petrography #Skarn #Geology

American Mineralogist: Karlditmarite, Cu9O4(PO4)2(SO4)2, the first copper phosphate-sulfate mineral from the Tolbachik volcano, Kamchatka, Russia Oleg I. Siidra, Evgeny V. Nazarchuk, Leonid A. Pautov, Artem S. Borisov, Anatoly N. Zaitsev, Evgeniya Yu. Avdontseva doi.org/10.2138/am-2...

American Mineralogist: Characterization and classification of unregulated mineral fibers: The case of fibrous datolite from Rio Manubiola Valley, Parma, Italy Riccardo Fantini, et al. Fibrous datolite has negligible toxicity and no carcinogenic potential. doi.org/10.2138/am-2...

Mineral Monday! Announcing: the 2027 MSA Annual Meeting Taking place at the end of the Tucson Gem & Mineral Show, this meeting will feature Breakfast with a Mineralogist, talks, posters, and field trips. Field trips will run on Feb. 18. #MSACommunications #MineralMonday #2027MSAMeeting

American Mineralogist: Thermodynamic and elastic properties of uvarovite at mantle conditions: Insights from first-principles calculations Xu Zheng, Yi Wang, Jiajun Jiang, Feiwu Zhang doi.org/10.2138/am-2...

Thin Section Thursday! Image & caption by Misha Sarco, UG student at James Madison University. A porphyritic basalt from a lava flow. It contains plagioclase phenocrysts in a fine-grained groundmass, with oscillatory zoning and albite twinning. #basalt #plagioclase #thinsectionthursday

American Mineralogist: The bond-valence topological model I: The bond-valence topological map of tourmaline from Forshammar, Sweden Peter Bačík This publication develops the application of Bond Valence Topological Modeling to solve crystal-chemical problems. doi.org/10.2138/am-2...

American Mineralogist: Most nakhlite martian meteorites were magmas, not crystal cumulates Allan H. Treiman Martian mantle is more complex than previously thought, and models of Martian magmatism must include contributions from mantle pyroxenite. doi.org/10.2138/am-2...

Mineral Monday: MSA Outreach at GSA and Other Meetings By Andrea Koziol At GSA (Geological Society of America) meetings MSA has a booth (Fig. 1) with books for sale, but also displays of interesting minerals, their occurrences, and uses. #MSACommunications #MineralMonday #outreach

American Mineralogist: Hydrothermal rutile as a recorder of fluid evolution and W mineralization: Insights from the Northern Baoshan Block, China Xiaobo Si, et al. Rutile is an effective carrier for W, preventing its loss in F- and B-rich magmatic-hydrothermal systems. doi.org/10.2138/am-2...

Thin Section Thursday! Image and caption contributed by Bjorn Isaacson, UG student at James Madison University. Eclogite: Starting as mafic basalt, through high P &T this rock reached the eclogite metamorphic facies creating the large rich isotropic garnets. #thinsectionthursday #eclogite

American Mineralogist: Super-hydrous arc magmas delay magnetite saturation and sulfide precipitation Lanqin Li, Xingcheng Liu, Jintuan Wang, Zhongxing Sun, Xiaolin Xiong doi.org/10.2138/am-2...

American Mineralogist: Formation pathways of Zn-spinel nanoparticles in Zn-contaminated soils and sediments Michael Schindler, Tessa Warkentine, Xinyang Li doi.org/10.2138/am-2...

American Mineralogist: From hydroxylbastnäsite to bastnäsite: A crystal chemistry perspective of the incomplete solid solution Qifa Zhong, Jingui Xu, Wei Zhao, Dongzhou Zhang, Shanrong Zhang, Kai Wang, Bin Fu, Wenge Zhou, Dawei Fan doi.org/10.2138/am-2...

Thin Section Thursday! Photo and caption by Matthew Cruz, UG student: Unakite is a metamorphic rock primarily composed of Epidote, Orthoclase, and Quartz. The vibrant colors (XPL) come from the interference colors of Epidote. #unakite #thinsection #thinsectionthursday

American Mineralogist: Experimental hydrogenation of pure and Cr-doped rutile at variable temperature, pressure, and oxygen fugacity Mona Lueder, Jörg Hermann, Paolo A. Sossi Hydrogen is retained to much higher temperatures than has been suggested by previous studies. doi.org/10.2138/am-2...

American Mineralogist: Apatite from metaluminous to peralkaline high-silica rhyolites in Yunshan Caldera (SE China): Implications for the evolution of magmatic systems Wentao Hong, et al. Apatite inclusions record heterogeneous crystal mush conditions. doi.org/10.2138/am-2...

Mineral Monday: Field Trip to Silver Bell Mine, AZ Part 2 By Johan Maertens All photos and text: (C) by Johan Maertens. First page: Chrysocolla forms as a secondary mineral, on other rocks in oxidized copper ore bodies. #MSACommunications #MineralMonday #SilverBellMine #copper #copperminerals