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Xu Lin, Marc Jolivet, Jing Liu-Zeng, Feng Cheng, Zhonghai Wu, Yuntao Tian, Lingling Li and Jixin Chen
Understanding the formation of the North Qilian Shan in the NE Tibetan Plateau provides insights into the growth mechanisms of the northern region of the plateau across time. Detrital zircon fission-track (ZFT) analyses of river sediments can provide a c...
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Christos L. Stergiou, Vasilios Melfos, Panagiotis Voudouris, Lambrini Papadopoulou, Paul G. Spry, Irena Peytcheva, Dimitrina Dimitrova and Elitsa Stefanova
The Gerakario Cu-Au porphyry deposit in the Kilkis ore district, northern Greece, contains epithermal quartz-stibnite veins on the eastern side of the deposit, which crosscut a two-mica gneiss. Metallic mineralization in these veins consists of stibnite ...
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Achim D. Herrmann, John T. Haynes, Richard M. Robinet and Norlene R. Emerson
Altered tephras (K-bentonites) are of great importance for calibration of the geologic time scale, for local, regional, and global correlations, and paleoenvironmental reconstructions. Thus, definitive identification of individual tephras is critical. Si...
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Mattia Bonazzi, Antonio Langone, Simone Tumiati, Edoardo Dellarole, Maurizio Mazzucchelli, Tommaso Giovanardi and Alberto Zanetti
Corundum-rich (up to 55 vol.%) felsic dykes formed with albite, ±K-feldspar, ±hercynite and ±biotite-siderophyllite cut the lower crustal rocks exposed in the Ivrea?Verbano Zone (NW Italy). Zircon is an abundant accessory mineral and its investigation th...
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Patrick Nadoll, Meike Rehm, Florian Duschl, Reiner Klemd, Dennis Kraemer and Marta Sosnicka
Hydrothermal fluorites from Paleozoic sedimentary rocks and volcanic units in the North German Basin (NGB) have been investigated to create a petrographic and geochemical inventory—with particular focus on strategic elements such as rare earth elem...
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Marian V. Lupulescu, Jeffrey R. Chiarenzelli, Mark E. Pecha, Jared W. Singer and Sean P. Regan
Columbite crystals from niobium-yttrium-fluorine (NYF) pegmatites lacking zircon or containing metamict cyrtolite were analyzed for major and minor elements (Electron Microprobe (EMP)), trace elements (Laser Ablation-Inductively Coupled Plasma-Mass Spect...
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Ewa Slaby, Hans-Jürgen Förster, Richard Wirth, Alicja Wudarska, Lukasz Birski and Izabela Moszumanska
Phosphates from the Martian shergottite NWA 2975 were used to obtain insights into the source and subsequence differentiation of the melt/melts. The crystallization of two generations of fluorapatite (F > Cl~OH and F-rich), chlorapatite and ferromerrilli...
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Maroua Allani, Narjès Batis, Abdeldjelil Nehari, Hugues Cabane, Kheirreddine Lebbou, Christophe Pecheyran, Corine Reibel, Jean-Jacques Boy
Pág. 12 - 19
Langatate La3Ga5.5Ta0.5O14 is piezoelectric crystal from langasite family, commonly grown by Czochralski method from Ir crucible. Langatate crystals of different colors (colorless, orange, green) have been studied by optical spectroscopy in UV-Visible (2...
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Carlos Alberto García-Ramírez, Vanessa Rey León, Víctor Alejandro Valencia
Pág. 307 - 327
La Unidad Ortoneis presente en el Macizo de Santander, ubicado en los Andes del Norte de Colombia, está
compuesta principalmente de ortoneises cuarzo-feldespáticos, pelíticos y en menor proporción ortoneises de composición
máfica y anfibolitas. Estudios...
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Alfonso Encinas,Wolfgang Stinnesbeck,Victor A. Valencia
Pág. 436 - 445
Upper Cretaceous marine rocks crop out along the Pacific coast of central and south-central Chile between 33° and 37°S. These strata constitute an important reference for the Upper Cretaceous of South America due to their diverse fossil fauna and flora. ...
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