Results 71 to 80 of about 322 (183)

Ca-Al silicates in low-grade metavolcanic rocks from southern Tanzawa Mountains, Central Japan.

open access: yesJOURNAL OF MINERALOGY, PETROLOGY AND ECONOMIC GEOLOGY, 1997
The metavolcanics of the Miocene Tanzawa Group of the southern Tanzawa Mountains can clearly be divided into six mineral zones ; stilbite, laumontite, prehnite-pumpellyite, epidote, epidote-amphibole and amphibole zones. Four phases of mafic phyllosilicates in the five lower grade zones are identified by systematic X-ray diffraction studies; (1 ...
Yongjie ZHANG, Takahisa YOSHIMURA
openaire   +2 more sources

Precambrian crustal evolution and Cretaceous–Palaeogene faulting in West Greenland: The Nordre Strømfjord shear zone and the Arfersiorfik quartz diorite in Arfersiorfik, the Nagssugtoqidian orogen, West Greenland [PDF]

open access: yesGeological Survey of Denmark and Greenland Bulletin, 2006
The Nordre Strømfjord shear zone in the fjord Arfersiorfik, central West Greenland, consists of alternating panels of supracrustal rocks and orthogneisses which together form a vertical zone up to 7 km wide with sinistral transcurrent, ductile ...
Stensgaard, Bo Møller   +3 more
doaj  

The Theodul Glacier Unit, a slab of pre-Alpine rocks in the Alpine meta-ophiolite of Zermatt-Saas, Western Alps

open access: yesSwiss Journal of Geosciences, 2020
The Theodul-Glacier-Unit (TGU) is a 100 m thick and 2 km long slab of pre-Alpine schist, gneiss and mafic rocks tectonically emplaced in the eclogite-facies Zermatt-Saas meta-ophiolite nappe (ZSU).
Kurt Bucher   +4 more
doaj   +1 more source

Tectonic implications of paleontologic dating of Cretaceous-Danian sections of Eastern Cuba

open access: yesGeologica Acta, 2006
The sedimentary rocks intercalated in volcanic and metavolcanic sections of Mayarí-Baracoa and Sierra del Purial Mountains (Eastern Cuba), yielded Cretaceous through Danian microfossils.
M. A. ITURRALDE-VINENT   +3 more
doaj   +1 more source

Petrogenetic and Tectonic Evolution of the Cariris Velhos Event in the Afogados da Ingazeira Region (PE), Alto Pajeú Terrane, Borborema Province [PDF]

open access: yesGeologia USP. Série Científica, 2011
The Tonian Cariris Velhos event was studied in the area around Afogados da Ingazeira town, Pernambuco State,Northeast Brazil, which is situated within the Alto Pajeú terrane, a Tonian-Ediacaran composite domain of the BorboremaProvince. The exposed rocks
Alberto de Oliveira Sales   +4 more
doaj  

Gold deposits in poly-deformed metasedimentary rocks: a case study of the C1-Santaluz gold deposit, Itapicuru Greenstone Belt, Northeast of Brazil

open access: yesBrazilian Journal of Geology
: The C1-Santaluz gold deposit is located in the Itapicuru greenstone belt in Bahia State, Brazil. Metavolcanic and metasedimentary rocks dominate at the base and top, respectively.
José Antonio Cirillo de Assis   +1 more
doaj   +1 more source

Progress in the Application of Oxygen Isotopes in the Study of Petrogenesis

open access: yesYankuang ceshi, 2013
Since different types of rocks on the earth have different oxygen isotope compositions, they can be used to discuss the origins of various rocks and it has become a powerful tool for studying petrology.
LI Tie-jun
doaj  

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