Results 51 to 60 of about 6,981 (220)

Ductile Extrusion Triggered by Continental Collision in NE Brazil

Terra Nova, EarlyView.
ABSTRACT The Borborema Province in northeastern Brazil hosts one of the world's largest strike‐slip shear zone networks, active during the late Neoproterozoic assembly of West Gondwana. Whether these shear zones initiated during active continental collision or as a post‐orogenic response to far‐field stresses remains debated.
L. R. Tesser, C. E. Ganade, C. R. Cioffi, J. B. Forshaw, M. Hueck, E. Celis, M. A. S. Basei   +6 more
wiley   +1 more source

Temporal and Hf isotope geochemical evolution of southern Finnish Lapland from 2.77 Ga to 1.76 Ga [PDF]

Bulletin of the Geological Society of Finland, 2012
The southern Finnish Lapland area in the central part of the Fennoscandian shield is a geologically complex zone comprising several Archean blocks and Paleoproterozoic supracrustal belts all of which are intruded by voluminous Paleoproterozoic granites ...
L.S. Lauri, T. Andersen, J. Räsänen, H. Juopperi   +3 more
doaj   +1 more source

Zircon REE patterns and geochemical characteristics of Paleoproterozoic anatectic granite in the northern Tarim Craton, NW China: implications for the reconstruction of the Columbia supercontinent

, 2012
Because Archean basement rocks are sparsely distributed around the Tarim Basin, little is known of the relationship between the Tarim Craton and the Paleo- to Mesoproterozoic Columbia supercontinent.
Chao Yuan, Kroener, A, Xiaoping Long, Sun, M, Long, X, Hu, A, Alfred Kröner, Min Sun, Yuan, Chao, Hu, Aiqin, Aiqin Hu, Sun, Min, Kroener, Alfred, Long, Xiaoping, Yuan, C   +14 more
core   +1 more source

Vetreny belt as a geological heritage of unique paleoproterozoic tectonomagmatic processes in the Fennoscandin shield

Известия высших учебных заведений: Геология и разведка
We presented the history of discovery and development of geological hypotheses about the conditions of formation of one of the largest Paloproterozoic structures of the Baltic Shield  — the Vetreny Belt.
S. V. Mezhelovskaya, К. I. Yushin, А. D. Mezhelovsky   +2 more
doaj   +1 more source

Mafic-ultramafic intrusions of Matokulma, Palojärvi, and Hongonniittu within the Central Finland Granitoid Complex with special reference to their petrogenesis and ore potential [PDF]

Bulletin of the Geological Society of Finland
We describe three previously unknown or poorly studied mafic-ultramafic intrusions (Matokulma, Palojärvi, Hongonniittu) from the south-central part of the Paleoproterozoic Central Finland Granitoid Complex (CFGC).
Seppo Karvinen, Hannu V. Makkonen, Perttu Mikkola, O. Tapani Rämö, Hannu Huhma, Matti Niskanen   +5 more
doaj   +1 more source

The Paleoproterozoic Evolution of Basement Rocks of the Taebaeksan Basin, Korean Peninsula, and Their Correlation to Those of the Paleoproterozoic Massifs in the Korean Peninsula

, 2023
The Korean Peninsula mainly comprises the Paleoproterozoic Gwanmo, Nangnim, Gyeonggi, and Yeongnam massifs from north to south. The Paleoproterozoic basement is rarely exposed in the Paleozoic Taebaeksan basin, which is located in the northeastern part ...
Byung Choon Lee, Deung-Lyong Cho, Chang Whan Oh, Bo Young Lee, Seung Hwan Lee   +4 more
core   +1 more source

Pyrite paragenesis and multiple sulfur isotope distribution in late Archean and early Paleoproterozoic Hamersley Basin sediments

, 2008
The sulfur isotope record in late Archean and early Paleoproterozoic rocks is of considerable importance because it provides evidence for changes in early Earth atmospheric oxygen levels and potentially constrains the origin and relative impact of ...
Kim A. Baublys, Baublys, Kim A., Elisa Young, Partridge, Michaela A., Suzanne D. Golding, Young, Elisa, Michaela A. Partridge, Golding, Suzanne D.   +7 more
core   +1 more source

Re-Os age of molybdenite from the Hannivka deposit, Kryvyi Rih structure, Ukrainian Shield

Мінеральні ресурси України
This article presents the results of isotopic dating of molybdenite using the Re–Os method to determine the age of mineralization at the Hannivka deposit.
Yu. Ye. Khomych, V. V. Sukach, L. V. Shumlyanskyy, S. M. Bondarenko, V. O. Syomka, S. Tessalina, M. M. Reshetnyk   +6 more
doaj   +1 more source

Paleoproterozoic post-orogenic magmatism in southern Finland; geochemical, geochronological and Sr-Nd isotopic constraints on origin and magmatic evolution [PDF]

Bulletin of the Geological Society of Finland
Fifteen post-orogenic, basic to acidic High-Barium-Strontium (HiBaSr) intrusions of shoshonitic affinity have been recognized in central and southern Finland.
Oliver Teräs, Kaisa Nikkilä, Perttu Mikkola, Anna Kotilainen, Olav Eklund, O. Tapani Rämö   +5 more
doaj   +1 more source

NEW DATA ON HIGH-CARBONACEOUS SHUNGIT-LIKE ROCKS OF MLYNKOVSKII AREA (KRIVOI ROG-KREMENCHUG ZONE, UKRAINIAN SHIELD)

Геохімія техногенезу, 2019
The paper presents the results of mineralogical, petrographic, electron microscopy, isotopic and X-ray structural studies of Paleoprotero-zoic high-carbon schungite-like rocks of the Mlynkivska area (Pravoberezhnyi district of the Kryvyi Rih-Kremenchuk ...
Yatsenko V., Zaborovskaya L., Pokalyuk V., Lashko S., Zaborovsky V., Lyzhachenko N.   +5 more
doaj   +1 more source