Results 71 to 80 of about 5,261 (211)

Petrographic Study of Some Paleoproterozoic Sedimentary Rocks in the Chagupana and Tarkwa Areas of Ghana [PDF]

, 2020
Blestmond A. Brako, Gordon Foli, Chiri G. Amedjoe, Simon K. Y. Gawu   +3 more
openalex   +1 more source

Reappraisal of the Sumé Complex: geochemistry and geochronology of metaigneous rocks and implications for Paleoproteorozoic subduction-accretion events in the Borborema Province, NE Brazil

Brazilian Journal of Geology, 2019
The Alto Moxotó Terrane represents the largest exposure of Paleoproterozoic rocks in the central Borborema Province. Several medium- to high-grade metamorphic units are described in the terrane, however geochronological data are still scarce, and the ...
Edilton José dos Santos, Lauro Cézar Montefalco de Lira Santos   +1 more
doaj   +1 more source

Composition of iron oxides in Archean and Paleoproterozoic mafic-ultramafic hosted Ni-Cu-PGE deposits in northern Fennoscandia: application to mineral exploration [PDF]

, 2020
Marko Moilanen, Eero Hanski, Jukka Konnunaho, T. Törmänen, Sheng-Hong Yang, Yann Lahaye, Hugh O’Brien, J. Illikainen   +7 more
openalex   +1 more source

A late Paleoproterozoic (1.74 Ga) deep‐sea, low‐temperature, iron‐oxidizing microbial hydrothermal vent community from Arizona, USA [PDF]

, 2021
Crispin T. S. Little, Karen C. Johannessen, Stefan Bengtson, Clara S. Chan, Magnus Ivarsson, John F. Slack, Curt Broman, Ingunn H. Thorseth, Tor Grenne, Olivier Rouxel, Andrey Bekker   +10 more
openalex   +1 more source

Pb Isotope Mapping of Paleoproterozoic Gneisses in the SW Grenville Province: Evidence for a Cryptic Continental Suture

Geosciences, 2018
New whole-rock lead (Pb) isotope analyses are presented in this study for granitoid orthogneisses from the Southwest Grenville Province in Ontario and Western Quebec.
Gabriel A. Arcuri, Alan P. Dickin
doaj   +1 more source

Geochemistry and Texture of Clinopyroxene Phenocrysts from Paleoproterozoic Picrobasalts, Karelian Craton, Fennoscandian Shield: Records of Magma Mixing Processes [PDF]

, 2020
С. А. Светов, Svetlana Chazhengina, A. V. Stepanova   +2 more
openalex   +1 more source

Age of the granulitic metamorphism of the Nyong complex in the west border of Congo Craton, South Cameroon

Discover Geoscience
Pressure and temperature conditions and electron microprobe analysis dating on monazite were conducted to investigate the age of the tectono-metamorphic events of Nyong Complex.
Ndema Mbongué Jean-Lavenir, Nzenti Jean Paul, Cheo Emmanuel Suh, Sigue Cyrille   +3 more
doaj   +1 more source

Contribution to the Study of Paleoproterozoic Materials for the Improvement of Social Housing in the Kedougou Region: Case of Mako Andesitic Meta-Tuffs

, 2020
Abdou Diouf, Adama Dione, Mahamadane Diène, Matar Ndiaye   +3 more
openalex   +2 more sources

Geological records of the Great Oxidation Event (GOE) in China: Progress, challenge, and opportunity

Dizhi lixue xuebao
Objective  The Great Oxidation Event (GOE) during the early Paleoproterozoic represents one of the most significant geological events in Earth’s history and has profound impacts on Earth’s surface environment, biological evolution, and the formation of ...
ZHANG Shuanhong
doaj   +1 more source

Paleoproterozoic to Cenozoic zircon U–Pb ages with Hf signatures from metamorphic rocks and granodiorite of Tokunoshima: constraints on the geotectonic subdivision of the Ryukyu island arc, Southwest Japan

, 2020
Hiroshi Yamamoto, K. Okamoto, Sun‐Lin Chung, Hao‐Yang Lee, Yuji Mita, Shuro Ueda, Masaru Terabayashi   +6 more
openalex   +1 more source