Mineral phase equilibria and zircon geochronology constraining the P–T–t path of granulite–facies metapelites of the Mashan Complex in the Shangsanyang area, Eastern Heilongjiang Province, China

2021 ◽  
Vol 362 ◽  
pp. 106283
Author(s):  
Yan Yang ◽  
Changqing Zheng ◽  
Chenyue Liang ◽  
Xuechun Xu ◽  
Jianbo Zhou ◽  
...  
Keyword(s):  
Phase Equilibria ◽  
Granulite Facies ◽  
Heilongjiang Province ◽  
Zircon Geochronology ◽  
Mineral Phase ◽  
T Path

Further evidence for two metamorphic events in the Mawson Continent

2017 ◽  
Vol 30 (1) ◽  
pp. 44-65 ◽  
Author(s):  
Megan A. Williams ◽  
David E. Kelsey ◽  
Martin Hand ◽  
Tom Raimondo ◽  
Laura J. Morrissey ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Phase Equilibria ◽  
Granulite Facies ◽  
East Antarctica ◽  
Forward Modelling ◽  
Insight Into

AbstractIn this study,in situand erratic samples from George V Coast (East Antarctica) and southern Eyre Peninsula (Australia) have been used to characterize the microstructural, pressure–temperature and geochronological record of upper amphibolite and granulite facies polymetamorphism in the Mawson Continent to provide insight into the spatial distribution of reworking and the subice geology of the Mawson Continent. Monazite U-Pb data shows thatin situsamples from the George V Coast record exclusively 2450–2400 Ma ages, whereas most erratic samples from glacial moraines at Cape Denison and the Red Banks Charnockite record only 1720–1690 Ma ages, consistent with known ages of the Sleaford and Kimban events, respectively. Phase equilibria forward modelling reveals considerable overlap of the thermal character of these two events. Samples with unimodal 1720–1690 Ma Kimban ages reflect either formation after the Sleaford event or complete metamorphic overprinting. Rocks recording only 2450–2400 Ma ages were unaffected by the younger Kimban event, perhaps as a result of unreactive rock compositions inherited from the Sleaford event. Our results suggest the subice geology of the Mawson Continent is a pre-Sleaford-aged terrane with a cover sequence reworked during the Kimban event.

scholarly journals PYROXENES AND THE P-T PATH IN GRANULITE FACIES OF SW MINAS GERAIS, BRAZIL

1997 ◽  
Vol 27 (1) ◽  
pp. 49-52 ◽  
Author(s):  
ASIT CHOUDHURI ◽  
SUNDARAM S. IYER ◽  
JOSÉ RENATO NOGUEIRA
Keyword(s):  
Granulite Facies ◽  
Minas Gerais ◽  
T Path
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