Results 191 to 200 of about 1,706 (214)

Nature of the Angular Unconformity between the Paleozoic Metasedimentary Rocks and the Mesozoic Metavolcanic Rocks in the Eastern Sierra Nevada, California

Geological Society of America Bulletin, 1974
Two major wall-rock sequences, the Paleozoic metasedimentary rocks and the Mesozoic metavolcanic rocks, in the eastern Sierra Nevada, California, are separated by an angular unconformity rather than by a fault as has been proposed by other investigators.
CHARLES A. BROOK, WARREN J. NOKLEBERG, RONALD W. KISTLER   +2 more
openaire   +1 more source

Geochemistry and origin of Archean felsic metavolcanic rocks, central Noranda area, Quebec, Canada

Canadian Journal of Earth Sciences, 1987
Felsic magma petrogenesis was studied by analyzing 24 stratigraphically controlled Archean andesite-to-rhyolite lava flows of both tholeiitic and calc-alkalic affinity from the upper Noranda Subgroup, Quebec, using instrumental neutron activation and X-ray fluorescence techniques.
Osamu Ujike, A. M. Goodwin
openaire   +1 more source

Geochemistry and tectonic interpretation of some metavolcanic rock units of the western North Cascades, Washington

Geological Society of America Bulletin, 1989
Metavolcanic rocks of the western North Cascades of Washington, including the Chilliwack Group (CG), the Elbow Lake Formation (ELFm), and the Yellow Aster Complex (YAC), have been analyzed for clinopyroxene composition and whole-rock major, trace, and rare-earth elements (REE9s) to determine their original chemistry and tectonic setting.
J. H. SEVIGNY, E. H. BROWN
openaire   +1 more source

Felsic Metavolcanic Rocks of the Sūduva Suite

2022
openaire   +1 more source

Petrogenesis, LA-ICP-MS zircon U-Pb geochronology and geodynamic implications of the Kribi metavolcanic rocks, Nyong Group, Congo craton

Acta Geochimica, 2022
Sylvestre Ganno, Gus Djibril Kouankap Nono, Donald Hermann Fossi   +2 more
exaly  

Geochemistry, zircon U–Pb geochronology, and Hf isotopes of the metavolcanic rocks in the Tongbai orogen of central China: Implication for Neoproterozoic oceanic subduction to slab break-off

Precambrian Research, 2021
Pan-Pan Niu, Shao-Yong Jiang
exaly  

Late Neoarchean metavolcanic rocks from the Tonghua area, Southern Jilin Province, China: Constraints on the formation and evolution of the northeastern North China Craton

Precambrian Research, 2021
En Meng, Shoufa Lin
exaly  

Late Neoarchean geodynamic evolution: Evidence from the metavolcanic rocks of the Western Shandong Terrane, North China Craton

Gondwana Research, 2020
Shuwen Liu, Yalu Hu, Rongrong Guo
exaly  

Age of Metavolcanic Rocks of the Kurumkan Formation of the Aldan Shield

Doklady Earth Sciences
S. D. Velikoslavinskii, V. V. Bortnikov, E. B. Sal’nikova, A. B. Kotov, E. V. Tolmacheva, V. P. Kovach, Yu. V. Plotkina, T. M. Skovitina, N. Yu. Zagornaya   +8 more
openaire   +1 more source

Two contrasting Neoarchean metavolcanic rock suites in eastern Hebei and their geodynamic implications for the northern North China Craton

Gondwana Research, 2021
Jinghao Fu, Shuwen Liu
exaly