Highly siderophile element behaviour accompanying subduction of oceanic crust: Whole rock and mineral-scale insights from a high-pressure terrain by Dale, C, Burton, K, Pearson, D, Gannoun, A, Alard, O, Argles, T, Parkinson, I

“…This work, therefore, provides whole rock and mineral-scale insights into the PGE budget of gabbroic oceanic crust and the effects of subduction metamorphism on gabbroic and basaltic crust. Chondrite-normalised PGE patterns for the gabbros are similar to published mid-ocean ridge basalts (MORB), but show less inter-element fractionation. …”

Refractory and semi-volatile organics at the surface of comet 67P/Churyumov-Gerasimenko: insights from the VIRTIS/Rosetta imaging spectrometer by Quirico, E, Moroz, LV, Schmitt, B, Arnold, G, Faure, M, Beck, P, Bonal, L, Ciarniello, M, Capaccioni, F, Filacchione, G, Erard, S, Leyrat, C, Bockelee-Morvan, D, Zinzi, A, Palomba, E, Drossart, P, Tosi, F, Capria, MT, De Sanctis, MC, Raponi, A, Fonti, S, Mancarella, F, Orofino, V, Barucci, A, Blecka, MI, Carlson, R, Despan, D, Faure, A, Fornasier, S, Gudipati, MS, Longobardo, A, Markus, K, Mennella, V, Merlin, F, Piccioni, G, Rousseau, B, Taylor, F, Rosetta VIRTIS Team

“…(iv) No hydrated minerals were identified and our data support the lack of genetic links with the CI, CR and CM primitive chondrites. This concerns in particular the Orgueil chondrite, previously suspected to have been of cometary origin. …”

Geochemical and Isotopic Compositions of Fluorites from the Yama Fluorite Deposit in the Qilian Orogen in Northwest China, and Their Metallogenic Implications by He Jiao, Guo-Biao Huang, Wei Ma, Qiang-Qiang Cui, Wei-Hu Wang, Qing-Feng Ding, Xuan Zhou, Rui-Zhe Wu

“…The studied fluorite samples have similar chondrite-normalized REEs, including Y patterns, with relatively strong enrichment in heavy REEs, negative Eu anomalies, strongly positive Y anomalies, and comparably invariable Y/Ho ratios of 41.43–73.79, suggesting a unique hydrothermal genesis. …”
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Mineralogy and Geochemistry of Nephrite Jade from Yinggelike Deposit, Altyn Tagh (Xinjiang, NW China) by Ying Jiang, Guanghai Shi, Liguo Xu, Xinling Li

“…Geochemical studies show that all nephrite samples have low bulk-rock Fe/(Fe + Mg) values (0.02–0.05), as well as low Cr (0.81–34.68 ppm), Co (1.10–2.91 ppm), and Ni (0.52–20.15 ppm) contents. Chondrite-normalized REE patterns of most samples exhibit strong to moderate negative Eu anomalies (0.04–0.67), moderate LREE enrichments, nearly flat HREE patterns, and low ΣREE contents (2.16–11.25 ppm). …”
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Formation of the Chalukou High Fluorine-Type Mo (–Zn–Pb) Deposit, NE China: Constraints from Fluorite and Sphalerite Rare Earth Elements and Sr–Nd Isotope Compositions by Luying Jin, Kezhang Qin, Guangming Li, Junxing Zhao, Zhenzhen Li, Zhuyin Chu, Guoxue Song

“…A detailed rare earth element (REE) and Sr–Nd isotope study of fluorite combined with Sr isotopes of sphalerite is conducted for the Chalukou deposit. The chondrite-normalised REE patterns of fluorites from molybdenite veins show light REE (LREE)-enriched patterns, with negative Eu anomalies (δEu = 0.60) and weakly negative Y anomalies (Y/Y* = 0.72). …”
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Application of X-ray Powder Diffraction and Inductively Coupled Plasma-Mass Spectrometry in Study on Mineralogical Characteristics and Significance of Wolframite from Xihuashan Tun... by LU Lin, LIANG Ting, CHEN Zheng-hui, WANG Yong, HEI Huan, XIE Xing

“…Sc, Y, Nb and Ta show dynamic changes of content in the vertical direction, which reflect complexity of ore fluid migration. The chondrite-standardized REEs distribution patterns are characterized by left-leaning shapes with high ΣREEs (397.16×10-6-1071.11×10-6), relatively heavy REEs enrichment and strong Eu negative anomaly. …”
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Geochemical cycling during subduction initiation: Evidence from serpentinized mantle wedge peridotite in the south Andaman ophiolite suite by Abhishek Saha, M. Santosh, Sohini Ganguly, C. Manikyamba, Jyotisankar Ray, Jagadish Dutta

“…Geochemical features of the studied rocks, marked by Al2O3/TiO2 > 23, LILE-LREE enrichment, HFSE depletion, and U-shaped chondrite-normalized REE patterns with (La/Sm)N > 1 and (Gd/Yb)N < 1, suggest contributions from boninitic mantle melts. …”
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Tectono-magmatic evolution of Tethyan oceanic lithosphere in supra subduction zone fore arc regime: Geochemical fingerprints from crust-mantle sections of Naga Hills Ophiolite by Anisha Verencar, Abhishek Saha, Sohini Ganguly, C. Manikyamba

“…The primary igneous textures for the mantle peridotites have been overprinted by extensive serpentinisation whereas the crustal section rocks reflect crystal cumulation in a magma chamber. Chondrite normalised REE profiles for the cumulate peridotite-olivine gabbro-gabbro assemblage constituting the crustal section of NHO show flat to depleted LREE patterns consistent with their generation from depleted MORB-type precursor melt in an extensional tectonic setting, while the mantle peridotites depict U-shaped REE patterns marked by relative enrichment of LREE and HREE over MREE. …”
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High-pressure metamorphic rocks in the Borborema Province, Northeast Brazil: Reworking of Archean oceanic crust during proterozoic orogenies by Alanielson da Câmara Dantas Ferreira, Elton Luiz Dantas, Ticiano José Saraiva dos Santos, Reinhardt A. Fuck, Mahyra Tedeschi

“…The amphibolite lenses represent 2.65 ​Ga juvenile tholeiitic magmatism derived from depleted mantle sources (positive εHf(t) values of +3.81 to +30.66) later enriched by mantle metasomatism (negative εNd(t) values of –7.97). Chondrite and Primitive Mantle-normalized REE of analyzed samples and discriminant diagrams define two different oceanic affinities, with E-MORB and OIB signature. …”
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The podiform chromitites in the Dagküplü and Kavad mines, Eskisehir ophiolite (NW-Turkey): Genetic implications of mineralogical and geochemical data by I. UYSAL, F. ZACCARINI, M.B. SADIKLAR, M. TARKIAN, O.A.R. THALHAMMER, G. GARUTI

“…PGE contents are variable and range from 109 to 533 pbb. Chondrite-normalized PGE patterns are flat from Os to Rh and negatively sloping from Rh to Pd. …”
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Study of Iron and Stony Meteorite Ablation Based on Simulation Experiments in an Arc Heater by Lei Wang, Lei Ning Dang, Ling Wei Yang, Jin Bo Liu, Jie Huang, Zhen Jun Huang, Jing Kang Yang, Yue Luo

“…To observe meteorite ablation, simulation experiments were conducted on the L5 ordinary chondrite and IAB-MG iron meteorites in an arc-heated facility and three flight conditions were reproduced. …”
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Rotationally resolved spectroscopy of asteroid pairs: No spectral variation suggests fission is followed by settling of dust by Polishook, David, Moskovitz, Nicholas, DeMeo, Francesca E, Binzel, Richard P

“…In the case of an ordinary chondrite asteroid (S-complex), where the site of fission is expected to present non-weathered spectra, a lack of a fission “spot” (detectable spectroscopically) can be explained if the rotational-fission process is followed by the spread of dust that re-accumulates on the primary asteroid and covers it homogeneously. …”
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Metamorphic Evolution of Garnet-Bearing Ultramafic Rocks in the Hujialin Area, Sulu Ultrahigh-Pressure Orogenic Belt, Eastern China by Zeli Wang, Shukai Zhang, Xu-Ping Li, Songjie Wang, Dan Wang, Fan-Mei Kong, Jianguo Liu, Zengsheng Li, Dapeng Li, Jian Wang, Yongqiang Yang

“…The garnet clinopyroxenites have convex-upward chondrite-normalized rare earth element patterns, large positive Pb anomalies, and depletion of high-field-strength elements (e.g., Nb, Zr, and Ti), suggesting a mantle source protolith overprinted by fluid metasomatism. …”
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Lithospheric thinning and ignition of a Cordilleran magmatic flare-up: Geochemical and O-Hf isotopic constraints from Cretaceous plutons in southern Korea by Albert Chang-sik Cheong, Min-Ji Jung, Hui Je Jo, Jeongmin Kim, Shinae Lee, Youn-Joong Jeong

“…The early Late Cretaceous (94–85 Ma) granites now prevalent in Seoraksan-Woraksan-Sokrisan National Parks are highly silicic and display flat chondrite-normalized rare earth element patterns with deep Eu anomalies. …”
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Petrology and geochemistry of mafic and ultramafic cumulate rocks from the eastern part of the Sabzevar ophiolite (NE Iran): Implications for their petrogenesis and tectonic settin... by Fatemeh Rahmani, Mohamad Ali Mackizadeh, Moussa Noghreyan, Claudio Marchesi, Carlos J. Garrido

“…They indicate fractionated trends in the chondrite-normalized rare earth element (REE) plots and multi-element diagrams (spider diagrams). …”
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The small binary asteroid (939) Isberga by Carry, B., Matter, A., Scheirich, P., Pravec, P., Molnar, L., Mottola, S., Carbognani, A., Jehin, E., Marciniak, A., Birlan, M., Delbo, M., Barbotin, E., Behrend, R., Bonnardeau, M., Colas, F., Farissier, P., Fauvaud, M., Fauvaud, S., Gillier, C., Gillon, M., Hellmich, S., Hirsch, R., Leroy, A., Manfroid, J., Montier, J., Morelle, E., Richard, F., Sobkowiak, K., Strajnic, J., Vachier, F., Binzel, Richard P, DeMeo, Francesca E

“…Their density is assumed equal and found to be 2.91[subscript -2.01][superscript +1].72gcm[superscript -3], lower than that of the associated ordinary chondrite meteorites, suggesting the presence of some macroporosity, but typical of S-types of the same size range (Carry [2012]. …”
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Combined In Situ Chemical and Sr Isotopic Compositions and U–Pb Ages of the Mushgai Khudag Alkaline Complex: Implications of Immiscibility, Fractionation, and Alteration by Fan Yang, Wei Chen, Jindrich Kynicky, Yuancan Ying, Tian Bai

“…The Y/Ho ratios of altered apatite deviate from the chondritic values, which reflects alteration by hydrothermal fluids. …”
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Zircon U–Pb ages and O–Hf isotopes of Quaternary trachytes from the East Sea: Implications for the genesis of low-δ18O magmas by Hyun-Ok Choi, Jihye Oh, Chang Hwan Kim, Soon Young Choi, Won Hyuck Kim, Chan Hong Park

“…They showed light rare earth element (REE)-enriched patterns with (La/Yb)N ratios of 25.3–31.7 and mostly negative Eu anomalies in a chondrite-normalized REE plot. In addition, they were enriched in large-ion lithophile elements and high field strength elements; they exhibited positive Pb anomalies and strongly negative Ba, Sr, P, and Ti anomalies. …”
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Genesis of the Tangshang Au Deposit in Southeast Yunnan Province, China: Constraints from In Situ Chemical and S-Sr Isotope Analyses by Weifang Song, Pan Wu, Jianzhong Liu, Junhai Li, Zepeng Wang, Qinping Tan, Zhuojun Xie, Lulin Zheng

“…These results also demonstrate that the δ³⁴S values of the Au-bearing fluids are higher than those of basalt wall rocks. The flat chondrite-normalized REEs pattern and positive Eu anomaly of the calcite were similar to those obtained from Emeishan basalt, which suggests a reducing characteristic of hydrothermal fluids. …”
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Brief communication: Identification of 140&thinsp;000-year-old blue ice in the Grove Mountains, East Antarctica, by krypton-81 dating by Z. Hu, W. Jiang, W. Jiang, Y. Yan, Y. Huang, X. Tang, L. Li, F. Ritterbusch, G.-M. Yang, Z.-T. Lu, Z.-T. Lu, G. Shi, G. Shi

“…Together with the reported terrestrial age of a chondrite, we conclude that the Grove Mountains BIA holds considerable potential for paleoclimate studies.…”
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