Results 21 to 30 of about 72,388 (278)

Detrital zircon SHRIMP U-Pb age study of the Cordillera Darwin Metamorphic Complex of Tierra del Fuego : sedimentary sources and implications for the evolution of the Pacific margin of Gondwana [PDF]

, 2010
The Cordillera Darwin Metamorphic Complex in the southernmost Andes includes a basement of probable Palaeozoic age, a mid-Jurassic and younger volcano-sedimentary cover, and a suite of Jurassic granites, all of which were jointly metamorphosed during the
Calderon, M., Fanning, C.M., Herve, F., Klepeis, K., Mpodozis, C., Pankhurst, R.J., Thomson, S.N.   +6 more
core   +1 more source

Anomalously old biotite ⁴⁰Ar/³⁹Ar ages in the NW Himalaya [PDF]

, 2017
Biotite 40Ar/39Ar ages older than corresponding muscovite 40Ar/39Ar ages, contrary to the diffusion properties of these minerals, are common in the Himalaya and other metamorphic regions.
Grujic, Djordje, Kleeberg, Reinhard, Pfänder, Jörg, Ratschbacher, Lothar, Sperner, Blanka, Stübner, Konstanze, Warren, Clare   +6 more
core   +1 more source

TECTONOTHERMAL EVOLUTION OF THE ZAGAN METAMORPHIC CORE COMPLEX IN TRANSBAIKALIA AS A RESULT OF THE CRETACEOUS – PALEOCENE MONGOL-OKHOTSK POST-COLLISIONAL OROGEN DESTRUCTION

Геодинамика и тектонофизика, 2023
Thermochronological reconstructions of the Zagan metamorphic core complex were carried out using samples from the central part of the core, mylonite zone detachment and lower nappe with U/Pb zircon dating, 40Ar/39Ar amphibole and mica dating, and apatite
M. M. Buslov, A. V. Travin, Yu. A. Bishaev, E. V. Sklyarov   +3 more
doaj   +1 more source

A neoproterozoic age for the chromitite and gabbro of the Tapo Ultramafic Massif, Eastern Cordillera, Central Peru, and its tectonic implications [PDF]

, 2011
The ultramafic-mafic rocks of the Tapo Complex are exposed in the Eastern Cordillera of the Central Peruvian Andes. This complex is composed of serpentinised peridotites and metabasites with some podiform chromitite lenses and chromite disseminations and
Amaral, Baldo, Castroviejo, Castroviejo, Cawood, Chew, Colombo C.G. Tassinari, Dalmayrac, Dalziel, Eurico Pereira, Fuck, Irvine, Jorge Acosta, Jose F. Rodrigues, Le Maitre, Ludwig, Megard, Palme, Pearce, Pedrosa-Soares, Ramos, Ramos, Ramos, Ricardo Castroviejo, Sato, Steiger   +25 more
core   +3 more sources

Zircon dissolution in a ductile shear zone, Monte Rosa granite gneiss, northern Italy [PDF]

, 2008
The sizes, distributions and shapes of zircon grains within variably deformed granite gneiss from the western Alps have been studied. Zircon shows numerous indicators of a metamorphic response in both the host gneiss and a 5 cm wide continuous ductile ...
Dal Piaz, Engi, Ewing, Hanchar, Hunziker, J. C. Martin, Keller, Kretz, Liati, Moller, Pawlig, Rubin, T. J. Dempster, Varva, Z. K. Shipton   +14 more
core   +1 more source

A laser probe ⁴⁰Ar /³⁹Ar and INAA investigation of four Apollo granulitic breccias [PDF]

, 2008
Infrared laser probe 40Ar/39Ar geochronology, instrumental neutron activation analysis (INAA) and analytical electron microscopy have been performed on four 0.5 x 1.0 x 0.3 cm polished rock tiles of Apollo 16 and 17 granulitic breccias (60035, 77017 ...
Hudgins, Jillian A., Kelley, Simon P., Korotev, Randy L., Sherlock, Sarah C., Spray, John G.   +4 more
core   +1 more source

Petrology and Tectonic Geophysics of Massive and Foliated Eclogites in the North Qilian Orogenic Belt: Changes in Mineral Composition, Oxygen Fugacity, and Fabric during Exhumation

Adsorption Science & Technology, 2022
The North Qilian orogenic belt is a typical area of “cold” subduction of the early Paleozoic oceanic plate, forming a series of high pressure and low temperature metamorphic rock assemblages. Among them, eclogite is a kind of protolith, which is basaltic
Feng Wang, Daorong Zhou, Xunhua Zhang
doaj   +1 more source

Analysis of the Sub-Surface Distribution of Graphite Minerals Using the Geoelectrical Resistivity Method in the Sabilambo Village, Kolaka Regency, Southeast Sulawesi Province

JGEET: Journal of Geoscience, Engineering, Environment and Technology, 2019
Southeast Sulawesi Province is one of the regions in Indonesia that has abundant mineral resources, the availability of several types of minerals is strongly influenced by the diversity of rock formations that make up the area. The metamorphic complex is
La Hamimu, L O Ngkoimani, Jahidin Jahidin, Suryawan Asfar, Usmardin Usmardin   +4 more
doaj   +1 more source

Hidden morphological characteristics study of Huyanshan rock mass based on coal seam volatilization

Meikuang Anquan
In order to find the hidden morphological characteristics of the rock mass in Huyanshan, based on the spatial variation characteristics of the volatilization of the coal seam on the side of the intrusive rock mass, the mechanism of the hidden ...
Zhiyang ZHAO, Jingui ZHAO, Gaofeng YANG
doaj   +1 more source

Structure, stability, and tsunami hazard associated with a rock slope in Knight Inlet, British Columbia [PDF]

Natural Hazards and Earth System Sciences, 2015
Rockfalls and rockslides during the past 12 000 years have deposited bouldery debris cones on the seafloor beneath massive rock slopes throughout the inner part of Knight Inlet.
D. P. van Zeyl, D. Stead, M. Sturzenegger, B. D. Bornhold, J. J. Clague   +4 more
doaj   +1 more source