Results 101 to 110 of about 38,084 (244)

Multi‐Mineral Geochronology Across the Neoproterozoic Brasília Nappe Stack: Constraints on Thermal Resetting and Metamorphic Architecture

Terra Nova, EarlyView.
ABSTRACT The Southern Brasília Orogen formed during Western Gondwana's final assembly and comprises nappe systems piled against the São Francisco Craton. We present new rutile U–Pb ages from the lowermost Canastra Group (> 2.2 Ga) and the uppermost Carrancas Group (~560 Ma), integrated with published zircon, monazite, garnet, and mica ages from the ...
Rodrigo Irineu Cerri, Alex J. Choupina A. Silva, Tamiris Pagotti Gonçalves Pinto, Rodrigo Prudente de Melo, George Luiz Luvizotto, Regiane Andrade Fumes, Fabrício de Andrade Caxito, Renato Moraes   +7 more
wiley   +1 more source

Radiation characteristics of coals at different stages of metamorphism

Записки Горного института
The formation of deposits and subsequent metamorphic processes that affect concentrations of radioactive elements in coal can indicate ongoing geological activities, therefore, analyzing trends in the radiation characteristics of coal throughout the ...
Nadezhda L. Aluker, Boris P. Aduev, Denis R. Nurmukhametov   +2 more
doaj  

Permian high-temperature metamorphism in the Western Alps (NW Italy) [PDF]

, 2017
During the late Palaeozoic, lithospheric thinning in part of the Alpine realm caused high-temperature low-to-medium pressure metamorphism and partial melting in the lower crust.
Kunz, Barbara, Paola Manzotti, Engi M., Pierre Lanari, Manzotti P., Lanzari, Piere, Engi, Martin, Darling J. R., von Niederhaeusern, Brigitte, Darling, James, Francesco Giuntoli, Lanari P., James R. Darling, Barbara E. Kunz, Lanari, Pierre, von Niederhäusern, Brigitte, Kunz, Barbara Eva, Kunz B. E., Brigitte von Niederhäusern, Giuntoli F., Manzotti, P., von Niederhausern B., Manzotti, Paola, Kunz, Barbara E., Darling, James R., Giuntoli, Francesco, Martin Engi   +26 more
core   +2 more sources

Metamorphism in the New England Orogen, eastern Australia: a review

, 2020
This paper summarises current knowledge on metamorphism within the entire New England Orogen (NEO) of eastern Australia. Rocks recording metamorphic assemblages characteristic of each of the three metamorphic facies series (high, medium and low P/T) have
S. Piazolo (8391375), N. R. Daczko (3852007), K. Jessop (8391372)   +2 more
core   +1 more source

Regional Metamorphism

, 2002
These lecture notes provide several examples of regional metamorphism. The notes introduce Barrovian Facies metamorphism, using the classic example of the Dalradian and Moinian Series of Scotland.
Stephen Nelson
core  

Nature and origin of fluids in granulite facies metamorphism [PDF]

, 1988
The various models for the nature and origin of fluids in granulite facies metamorphism were summarized. Field and petrologic evidence exists for both fluid-absent and fluid-present deep crustal metamorphism.
Newton, R. C.
core  

An improved method for characterizing coal metamorphism by XRD

, 2019
At present, the X-ray measurement method of coal metamorphism has the problem that the γ band is not well divided, the δ peak information is not used, and the background of the bottom is unreasonable.
Zhenwei, WANG, Chao, WANG, Younan, ZHAO, Zhaolin, LU   +3 more
core   +1 more source

Metamorphic Reactions and Metamorphic Facies [PDF]

, 1958
W. S. FYFE, F. J. TURNER, J. VERHOOGEN
openaire   +2 more sources

Plate Tectonics and Metamorphism: Teaching Complex Systems Using Videos and Animations

Geosciences
Metamorphism is a complex geologic process that is often poorly covered in introductory geology courses. This study explores the effectiveness of a video-based instructional intervention in improving student understanding of metamorphism and its ...
Siloa Willis, Robert J. Stern
doaj   +1 more source

An appraisal of peak temperatures and thermal histories in ultrahigh-temperature (UHT) crustal metamorphism: the significance of aluminous orthopyroxene [PDF]

, 1998
P(論文)Ultrahigh-temperature (UHT) crustal metamorphism occurs where peak metamorphic temperatures of 900-1100℃ have been attained at pressures in the range 7-13 kbar.
Harley, Simon L.
core