Results 1 to 10 of about 22,802 (265)

Geochemistry, provenance, and tectonic setting of Paleoproterozoic metasedimentary and metavolcanic units of the Estonian Alutaguse region, eastern Fennoscandia [PDF]

open access: yesEstonian Journal of Earth Sciences
This research focuses on the geochemical analysis of Paleoproterozoic metasedimentary and metavolcanic units in the Alutaguse region of northern Estonia, shedding light on the geodynamic evolution during the Svecofennian orogeny in eastern Fennoscandia ...
Juan David Solano-Acosta   +2 more
doaj   +1 more source

Archean metamorphic sequence and surfaces, Kangerdlugssuaq Fjord, East Greenland [PDF]

open access: yes
The characteristics of Archean metamorphic surfaces and fabrics of a mapped sequence of rocks older than about 3000 Ma provide information basic to an understanding of the structural evolution and metamorphic history in Kangerdlugssuaq Fjord, east ...
Kays, M. A.
core   +1 more source

Geophysical assessment of subsurface conditions at proposed building sites: implications for foundation failure and building collapse [PDF]

open access: yes, 2018
Building collapse has been a recurrent environmental hazard in Nigeria in the last two decades. This is a corollary of inadequate foundation investigation prior to construction, poor government policies, and general lack of awareness on the importance of
Ariyo, Stephen Oluwafemi   +4 more
core  

Unique basite-metabasite structures of the Pobuzhsky ore mining region, their geological significance and ore-bearing prospects (by geophysical and geological data)

open access: yesГеофизический журнал, 2018
The structure and prospects for ore content of three basite-metabasite massifs of the Pobuzhsky ore mining district — Bandurovsky, Troyan and Tarasovsky are considered using the example of the Tarasovska structure of the Middle Bug River of the ...
O.B. Gintov   +4 more
doaj   +1 more source

Early Archean tonalite gneiss in the upper peninsula of Michigan [PDF]

open access: yes
Geochronological results on tonalite gneiss of northern Michigan that is 3.56 Ga or slightly older is presented. Tonalitic augen gneiss and structurally overlying biotite gneiss and schist are exposed in a dome near Watersmeet.
Peterman, Z. E.   +2 more
core   +1 more source

A suggestion on the origin of biotite gneisses of the Ryoke belt in the Seto Inland Sea (Seto-nai-kai) region : Some biotite gneisses were derived from a different geologic unit to the Kuga froup [PDF]

open access: yes, 1995
The Kuga group is a Jurassic accretional complex that has been believed by many workers to be a unique geologic unit transformed into the Ryoke gneisses in the Seto Inland Sea region.
Nureki, Terukazu
core   +1 more source

Speculations on nature and extent of Archean basement in Labrador as indicated by SR, ND and PB isotopic systematics of proterozoic intrusives [PDF]

open access: yes
The Sm-Nd and Rb-Sr isotopic compositions of mid to late Proterozoic (approximately 1.6 to 1.1 Ga) massif-type anorthosites and mafic intrusives in the eastern Canadian shield are correlated with geographic location.
Ashwal, L. D.   +2 more
core   +1 more source

Geomechanical models of impact cratering: Puchezh-Katunki structure [PDF]

open access: yes
Impact cratering is a complex natural phenomenon that involves various physical and mechanical processes. Simulating these processes may be improved using the data obtained during the deep drilling at the central mound of the Puchezh-Katunki impact ...
Ivanov, B. A.
core   +1 more source

Characteristics and carbon stable isotopes of fluids in the Southern Kerala granulites and their bearing on the source of CO2 [PDF]

open access: yes
Carbon dioxide-rich inclusions commonly occur in the banded charnockites and khondalites of southern Kerala as well as in the incipient charnockites formed by desiccation of gneisses along oriented zones.
Harris, N. B. W.   +3 more
core   +1 more source

GARNET AS A CARRIER OF THE RARE EARTH MINERALIZATION IN THE IRTYSH SHEAR ZONE, EAST KAZAKHSTAN [PDF]

open access: yesМинералогия, 2016
REE mineralization (monazite and xenotime) in the plicated schist and granite gneisses of the Irtysh shear zone is established for the first time. The minerals occur as individual grains in rocks and microscopic inclusions in red and black garnets.
P.V. Ermolov   +3 more
doaj  

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