Results 31 to 40 of about 1,468 (200)
The Karla impact structure (Russia) explored by potential‐field investigations
Meteoritics &Planetary Science, Volume 57, Issue 5, Page 989-1003, May 2022., 2022 Abstract With no significant topographic expression and limited bedrock exposure, the ~10 km diameter Karla impact structure (Tatarstan, Russia) is poorly known. The age of the impact is also poorly constrained stratigraphically to between 4 and 60 Ma, even if an upper Miocene age is more likely.
Yoann Quesnel +9 more
wiley +1 more source
Ore bearing factors of breaking-block structures of the Ukrainian shield
Геофизический журнал, 2019 Most ore occurrences and mineral deposits are known to be located in tectonic fault zones. In this regard, the article analyzes the ore content of regional and local fault zones developed in the megastructures of the Ukrainian shield: Podolsky, Volynsky,
М. А. Yaroschuk +3 more
doaj +1 more source
Meteoritics &Planetary Science, Volume 57, Issue 4, Page 830-849, April 2022., 2022 Abstract Impact crater central peaks and peak ring complexes are important exploration targets for future missions to other planetary bodies, because they provide access to material uplifted from lower crustal levels. Material exposed there could also provide chronological constraints on crater formation events. Therefore, it is essential to understand
Romain Tartèse +2 more
wiley +1 more source
Metallogeny of the Lyapinsky megablock (Subpolar Urals)
NEWS of the Ural State Mining University, 2021 Purpose of the work: elucidation of the geological structure, manifestations of magmatism, geodynamics and metallogeny of one of the largest segments of the paleocontinental sector of the Lyapin megablock in the Urals. The peculiarity of the metallogenic specialization of the latter for uranium, thorium, rare metals, gold, optical quartz caused both ...
openaire +1 more source
Constraints on the origins of iron silicide spherules in ultrahigh‐temperature distal impact ejecta
Meteoritics &Planetary Science, Volume 56, Issue 7, Page 1369-1405, July 2021., 2021 Abstract Terrestrially occurring iron silicide spherules, described in the geological literature for 160 years as cosmogenic and approved as “extraterrestrial” minerals by IMA CNMMN in 1984, so far have escaped any serious examination by meteoriticists.
Sergei Batovrin +5 more
wiley +1 more source
Proceedings of the 55th ISOCARP World Planning Congress, 2019 In what way can the study of megablock typologies in the PRD deliver better insight in terms of process and scales of Chinese urbanization? In the Chinese context, the ‘collective’ has stood central to its urbanisms and processes of urbanization (Lu, 2006).
Yixuan Peng, Gerhard Bruyns, Darren Nel
openaire +1 more source
Cosmic impact versus terrestrial origin of the Azuara structure (Spain): A review [PDF]
, 2002 20 páginas, 9 figuras, 1 tabla.The Azuara structure is the largest one proposed so far in Spain as possibly related to a cosmic impact event. A review of the evidence set forward in favor of and against its cosmic origin indicates that the discussion is ...
Ansari, Junaid +5 more
core +1 more source
Геофизический журнал, 2013 Special features of seismogenic zone of the Ingul and MiddleDnieper megablocks of the Ukrainian Shield have been analyzed. Several seismogenic zones with small areas have been subdivided within its limits, which differ by degree of contrast of ...
O.A. Tripolsky +3 more
doaj +1 more source
The Lapland greenstone belt: Stratigraphic and depositional features in northern Finland [PDF]
Bulletin of the Geological Society of Finland, 1987 The Lapland greenstone belt formed in a continental environment, as a result of rifting of the 3.1—3.0 Ga Saamian craton. The basin subsided to a depth of five kilometres between 3.0—2.5 Ga and contains a sequence which is subdivided into Lower, Middle ...
M. Saverikko
doaj +1 more source
Геофизический журнал, 2021 Profile 3-DV (Skovorodino-Tommot) crosses in the sublatitudinal direction the Stanovoy and Aldan megablocks of the Aldan-Stanovoy shield. As the basic elements of the Earth’s crust section along the profile 3-DV, a technique was adopted for identifying ...
V. V. Stogny, G. A. Stogny
doaj +1 more source