Results 31 to 40 of about 114,650 (297)

Tectonic history of the South Tannuol Fault Zone (Tuva region of the northern Central Asian Orogenic Belt, Russia) : constraints from multi-method geochronology [PDF]

open access: yes, 2020
In this study, we present zircon U/Pb, plagioclase and K-feldspar Ar-40/Ar-39 and apatite fission track (AFT) data along the South Tannuol Fault Zone (STFZ).
De Grave, Johan   +6 more
core   +1 more source

Paleozoic magmatism in the southwest of Julfa (northwestern Iran): geochemical characteristics, U-Pb dating and tectonic setting [PDF]

open access: yesپترولوژی, 2019
Extensive sedimentary- igneous rock associations of Paleozoic age crop out in southwest of Julfa (northwest of Iran). Geochemically, the igneous rocks display various basic to acidic compositions.
morteza delavari   +2 more
doaj   +1 more source

Model of geological structure and prospects of petroleum bearing North Kara sedimentary basin [PDF]

open access: yesНефтегазовая геология: Теория и практика, 2023
Based on a comprehensive interpretation of seismic survey analyses and geological data on the islands and continental margin of Siberia, a model of the geological structure of the North Kara sedimentary basin is considered, and its seismostratigraphic ...
Kontorovich V.A.   +5 more
doaj  

Zn-Pb-Cu sulfide-bearing glacial sandstone erratics near Raahe on the western coast of Finland: Indicators of Paleozoic base metal mineralization at the bottom of the Bothnian Bay [PDF]

open access: yesBulletin of the Geological Society of Finland, 2019
Over the past tens of years, glacial sandstone erratics variably enriched in Zn, Pb and Cu have been collected from the coast south of Raahe, but their source has remained ambiguous.
Eero Hanski   +7 more
doaj   +1 more source

SOURCES OF THE PALEOZOIC SEDIMENTARY ROCKS IN THE NORA-SUKHOTINO TERRANE: RESULTS OF Sm-Nd ISOTOPIC-GEOCHEMICAL STUDIES

open access: yesГеодинамика и тектонофизика, 2023
The paper presents the first results on Sm-Nd isotopic-geochemical studies of the Paleozoic sedimentary rocks in the Nora-Sukhotino terrane at the northeastern flank of the South Mongolia-Khingan orogenic belt.According to the studies, the sedimentary ...
Yu. V. Smirnov, S. I. Dril
doaj   +1 more source

Structural and Tectonic Aspects of the Kuh-E Surmeh Pb-Zn Deposit, a Rare Case of Metallic Mineralization in the Zagros Fold-Thrust Belt [PDF]

open access: yesSustainable Earth Trends
The Surmeh deposit is a rare case of metallic mineralization in the Zagros FT-Belt. The regional structures with geological conditions from Paleozoic sequences to Late Paleozoic-Early Mesozoic extensional faulting, Cenozoic continental convergence and ...
Mohsen Ehteshami-Moinabadi   +2 more
doaj   +1 more source

Polychronous zircons of volcanics of the Navysh complex of the Lower Riphean Ai Formation (Southern Urals)

open access: yesGeoresursy, 2020
The volcanics of the Navysh complex of the Lower Riphean Ai Formation in the Southern Urals are well studied petrochemically and dated by several methods.
Artur A. Krasnobaev   +3 more
doaj   +1 more source

Reassessment of mid-Carboniferous glacial extent in southwestern Gondwana (Rio Blanco Basin, Argentina) inferred from paleo-mass transport of diamictites [PDF]

open access: yes, 2013
Late Paleozoic glacial diamictites occur in many localities in western Argentina, indicating that the region was strongly affected by glaciation during the mid-Carboniferous (late Serpukhovian–early Bashkirian).
Gulbranson, Erik L.   +6 more
core   +1 more source

Evaluation of geochemical characteristics and source of natural gas in Lower Paleozoic, Daniudi area, Ordos Basin

open access: yesShiyou shiyan dizhi, 2021
In recent years, great progress has been made in the exploration of natural gas in the Paleozoic in the Daniudi Gas Field in the northern Ordos Basin, especially the discovery of high yield industrial gas flow in the Ordovician weathering crust. However,
Xiao SUN   +7 more
doaj   +1 more source

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