MODERN FLYSCH SEDIMENTATION IN A MEDITERRANEAN ISLAND ARC SETTING

1974 ◽  
pp. 240-259 ◽  
Author(s):  
DANIEL JEAN STANLEY
Keyword(s):  
Island Arc ◽  
Mediterranean Island ◽  
Arc Setting

scholarly journals Petroleum resources in the Japanese island-arc setting

Episodes ◽  
1991 ◽  
Vol 14 (3) ◽  
pp. 236-241 ◽  
Author(s):  
Yoshiro Kikuchi ◽  
Satoshi Tono ◽  
Masaaki Funayama
Keyword(s):  
Island Arc ◽  
Japanese Island ◽  
Petroleum Resources ◽  
Arc Setting

Geochemistry of Archean carbonaceous cherts deposited at immature island-arc setting in the Pilbara Block, Western Australia

2002 ◽  
Vol 151 (1-2) ◽  
pp. 45-66 ◽  
Author(s):  
Kenichiro Sugitani ◽  
Koshi Yamamoto ◽  
Hideki Wada ◽  
S.S Binu-Lal ◽  
Masakazu Yoneshige
Keyword(s):  
Western Australia ◽  
Island Arc ◽  
Arc Setting

Mineral Potential Mapping in an Accreted Island-Arc Setting Using Aeromagnetic Data: An Example from Southwest Alaska

2017 ◽  
Vol 112 (2) ◽  
pp. 375-396 ◽  
Author(s):  
Eric D. Anderson ◽  
Thomas Monecke ◽  
Murray W. Hitzman ◽  
Wendy Zhou ◽  
Paul A. Bedrosian
Keyword(s):  
Island Arc ◽  
Aeromagnetic Data ◽  
Mineral Potential Mapping ◽  
Mineral Potential ◽  
Potential Mapping ◽  
Arc Setting

Detrital zircon geochronology and geochemistry of Jurassic sandstones in the Xiongcun district, southern Lhasa subterrane, Tibet, China: implications for provenance and tectonic setting

2018 ◽  
Vol 156 (4) ◽  
pp. 683-701 ◽  
Author(s):  
XINGHAI LANG ◽  
DONG LIU ◽  
YULIN DENG ◽  
JUXING TANG ◽  
XUHUI WANG ◽  
...  
Keyword(s):  
Detrital Zircon ◽  
Tectonic Setting ◽  
Oceanic Island ◽  
Island Arc ◽  
Igneous Rocks ◽  
Late Triassic ◽  
Chemical Index ◽  
Modal Abundance ◽  
Arc Setting ◽  
Detrital Zircon Ages

AbstractJurassic sandstones in the Xiongcun porphyry copper–gold district, southern Lhasa subterrane, Tibet, China were analysed for petrography, major oxides and trace elements, as well as detrital zircon U–Pb and Hf isotopes, to infer their depositional age, provenance, intensity of source-rock palaeo-weathering and depositional tectonic setting. This new information provides important evidence to constrain the tectonic evolution of the southern Lhasa subterrane during the Late Triassic – Jurassic period. The sandstones are exposed in the lower and upper sections of the Xiongcun Formation. Their average modal abundance (Q21F11L68) classifies them as lithic arenite, which is also supported by geochemical studies. The high chemical index of alteration values (77.19–85.36, mean 79.96) and chemical index of weathering values (86.19–95.59, mean 89.98) of the sandstones imply moderate to intensive weathering of the source rock. Discrimination diagrams based on modal abundance, geochemistry and certain elemental ratios indicate that felsic and intermediate igneous rocks constitute the source rocks, probably with a magmatic arc provenance. The detrital zircon ages (161–243 Ma) and εHf(t) values (+10.5 to +16.2) further constrain the sandstone provenance as subduction-related Triassic–Jurassic felsic and intermediate igneous rocks from the southern Lhasa subterrane. A tectonic discrimination method based on geochemical data of the sandstones, as well as detrital zircon ages from sandstones, reveals that the sandstones were most likely deposited in an oceanic island-arc setting. These results support the hypothesis that the tectonic background of the southern Lhasa subterrane was an oceanic island-arc setting, rather than a continental island-arc setting, during the Late Triassic – Jurassic period.

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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