Derivation of P–T paths for Middle–Late Triassic very low-grade metapelite from Hongcan Well 1 in the Zoigê Depression and their tectonic implications

2013 ◽  
Vol 59 (1) ◽  
pp. 82-99 ◽  
Author(s):  
Yan Tang ◽  
Longkang Sang ◽  
Rong Liu ◽  
Yanming Yuan ◽  
Yunlong Yang ◽  
...  
Keyword(s):  
Late Triassic ◽  
Low Grade ◽  
Tectonic Implications

Low-grade metamorphic belt in Jamaica and its tectonic implications

1976 ◽  
Vol 87 (9) ◽  
pp. 1283 ◽  
Author(s):  
G. DRAPER ◽  
R. R. HARDING ◽  
W. T. HORSFIELD ◽  
A. W. KEMP ◽  
A. E. TRESHAM
Keyword(s):  
Low Grade ◽  
Metamorphic Belt ◽  
Tectonic Implications

Petrogenesis and tectonic implications of Late-Triassic high ɛ Nd(t)-ɛ Hf(t) granites in the Ailaoshan tectonic zone (SW China)

2014 ◽  
Vol 57 (9) ◽  
pp. 2181-2194 ◽  
Author(s):  
HuiChuan Liu ◽  
YueJun Wang ◽  
WeiMing Fan ◽  
JianWei Zi ◽  
YongFeng Cai ◽  
...  
Keyword(s):  
Late Triassic ◽  
Tectonic Zone ◽  
Sw China ◽  
Tectonic Implications

scholarly journals Late Triassic high-Mg andesite/dacite suites from northern Hohxil, North Tibet: Geochronology, geochemical characteristics, petrogenetic processes and tectonic implications

Lithos ◽  
2011 ◽  
Vol 126 (1-2) ◽  
pp. 54-67 ◽  
Author(s):  
Qiang Wang ◽  
Zheng-Xiang Li ◽  
Sun-Lin Chung ◽  
Derek A. Wyman ◽  
Ya-Li Sun ◽  
...  
Keyword(s):  
Geochemical Characteristics ◽  
Late Triassic ◽  
Tectonic Implications

Regional implications of Upper Triassic metavolcanic and metasedimentary rocks on the Chilkat Peninsula, southeastern Alaska

1980 ◽  
Vol 17 (6) ◽  
pp. 681-689 ◽  
Author(s):  
George Plafker ◽  
Travis Hudson
Keyword(s):  
British Columbia ◽  
Volcanic Rocks ◽  
Upper Triassic ◽  
Late Triassic ◽  
Low Grade ◽  
Lake Area ◽  
Metasedimentary Rocks

A low-grade metamorphic sequence consisting of thick mafic volcanic rocks overlain by calcareous flysch with very minor limestone underlies much of the Chilkat Peninsula. Fossils collected from both units are of Triassic age, probably late Karnian. This sequence appears to be part of the Taku terrane, a linear tectono-stratigraphic belt that now can be traced for almost 700 km through southeastern Alaska to the Kelsall Lake area of British Columbia. The age and gross lithology of the Chilkat Peninsula sequence are comparable to Upper Triassic rocks that characterize the allochthonous tectono-stratigraphic terrane named Wrangellia. This suggests either that the two terranes are related in their history or that they are allochthonous with respect to one another and coincidentally evolved somewhat similar sequences in Late Triassic time.

Chapter 14: The Brucejack Au-Ag Deposit, Northwest British Columbia, Canada: Multistage Porphyry to Epithermal Alteration, Mineralization, and Deposit Formation in an Island-Arc Setting

2020 ◽  
pp. 289-311
Author(s):  
Warwick S. Board ◽  
Duncan F. McLeish ◽  
Charles J. Greig ◽  
Octavia E. Bath ◽  
Joel E. Ashburner ◽  
...  
Keyword(s):  
Volcanic Rocks ◽  
Lower Jurassic ◽  
Early Jurassic ◽  
Island Arc ◽  
Late Triassic ◽  
Low Grade ◽  
Coarse Aggregates ◽  
History Of ◽  
Arc Setting ◽  
Mineral District

Abstract The Brucejack intermediate-sulfidation epithermal Au-Ag deposit, located 65 km north of Stewart, BC, forms part of a well-mineralized, structurally controlled, north-south gossanous trend associated with Early Jurassic intrusions straddling the Late Triassic-Early Jurassic Stuhini-Hazelton Group unconformity in the Sulphurets mineral district. Mining of the deposit commenced in mid-2017 after a long history of exploration dating back to the 1880s. Mineralization is hosted in deformed Lower Jurassic island-arc volcanic rocks of the Hazelton Group exposed on the eastern limb of the Cretaceous McTagg anticlinorium. High-grade Au-Ag mineralization was formed from ~184 to 183 Ma in association with a telescoped, multipulsed magmatic-hydrothermal system beneath an active local volcanic center. Precious metal mineralization occurs as coarse aggregates of electrum and silver sulfosalts in steeply dipping, E- to SE-trending quartz-carbonate vein stockwork zones cutting low-grade intrusion-related phyllic alteration. Epithermal vein development is interpreted to have occurred during the waning stages of Early Jurassic sinistral transpression in a compressive arc environment, followed by a limited Cretaceous deformation overprint.

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