Neotethyan Late Cretaceous volcanic arc hydrothermal vent fauna

Geology ◽  
2007 ◽  
Vol 35 (9) ◽  
pp. 835 ◽  
Author(s):  
Crispin T.S. Little ◽  
Archil G. Magalashvili ◽  
David A. Banks
Keyword(s):  
Late Cretaceous ◽  
Hydrothermal Vent ◽  
Volcanic Arc

The Ganj Complex reinterpreted as a Late Cretaceous volcanic arc: Implications for the geodynamic evolution of the North Makran domain (southeast Iran)

2020 ◽  
Vol 195 ◽  
pp. 104306 ◽  
Author(s):  
Edoardo Barbero ◽  
Morteza Delavari ◽  
Asghar Dolati ◽  
Emilio Saccani ◽  
Michele Marroni ◽  
...  
Keyword(s):  
Late Cretaceous ◽  
Geodynamic Evolution ◽  
Volcanic Arc ◽  
The North

Late Cretaceous volcanic arc system in southwest Korea: Distribution, lithology, age, and tectonic implications

2017 ◽  
Vol 75 ◽  
pp. 125-140 ◽  
Author(s):  
Chang Woo Kwon ◽  
Kyoungtae Ko ◽  
Yong Sik Gihm ◽  
Hee Jae Koh ◽  
Hyeoncheol Kim
Keyword(s):  
Late Cretaceous ◽  
Volcanic Arc ◽  
Tectonic Implications

Origin of the Upper Cretaceous–Tertiary sedimentary basins within the Tauride–Anatolide platform in Turkey

2002 ◽  
Vol 139 (2) ◽  
pp. 191-197 ◽  
Author(s):  
Ö. F. GÜRER ◽  
E. ALDANMAZ
Keyword(s):  
Late Cretaceous ◽  
Upper Cretaceous ◽  
Evolutionary Model ◽  
Sedimentary Basins ◽  
Evolutionary Models ◽  
Volcanic Arc ◽  
Geological Characteristics ◽  
Neotethys Ocean ◽  
Basin Development ◽  
Tertiary Period

A number of sedimentary basins formed within the Tauride–Anatolide Platform of Anatolia during the Late Cretaceous–Tertiary period. Previous studies have proposed different tectonic and evolutionary models for each basin. Geological characteristics of the basins, however, suggest that all these basins are of the same origin and that they followed a similar evolutionary model to one another. Basin development within the Tauride–Anatolide Platform took place in a post-collisional environment following the northward subduction of the northern Neotethys ocean beneath the Pontides. The closure of the northern Neotethys ocean ended with collision of the Tauride–Anatolide Platform with the Pontide volcanic arc and resulted in large bodies of oceanic remnants thrust over the Tauride–Anatolide Platform as ophiolite nappes. Formation of the sedimentary basins followed the emplacement of the ophiolite nappes as they formed as piggy-back basins on top of the underlying thrust ophiolite basement.

Late Cretaceous age of the Hutshi, Mount Nansen, and Carmacks groups, southwestern Yukon Territory and northwestern British Columbia

1984 ◽  
Vol 21 (5) ◽  
pp. 554-558 ◽  
Author(s):  
H. C. Grond ◽  
S. J. Churchill ◽  
R. L. Armstrong ◽  
J. E. Harakal ◽  
G. T. Nixon
Keyword(s):  
British Columbia ◽  
Late Cretaceous ◽  
Volcanic Rocks ◽  
Yukon Territory ◽  
Calc Alkaline ◽  
Metamorphic Overprint ◽  
Volcanic Arc

Volcanic rocks of the Hutshi, Mount Nansen, and Carmacks groups occur in the southwestern Yukon where they unconformably overlie the Yukon Crystalline Terrane and deformed strata of the Whitehorse Trough. The volcanic rocks are faulted and tilted, locally altered, and largely postorogenic. The more basic Carmacks volcanics locally overlie intermediate to acid rocks of the Mount Nansen Group, but are mostly in isolated exposures northwest of the Hutshi and Mount Nansen volcanics.Hutshi – Mount Nansen volcanics of the Miners Range are porphyritic, partly vesicular calc-alkaline andesite flows and flow breccias intruded by calc-alkaline alkali-rich rhyolite and two-feldspar andesite dikes. A low-greenschist metamorphic overprint affects most rocks.Carmacks volcanics, near Carmacks, are flows, epiclastic breccias, and sintered tuffs interbedded with immature volcanic sandstone. One analysed breccia clast is calc-alkaline andesite, but the flows are potassic basalt, trachybasalt, and tristanite.Recent assignments of the Hutshi – Mount Nansen and Carmacks volcanic suites to early and mid-Tertiary ages, respectively, are incorrect as all are late Cretaceous. K–Ar dates for a Hutshi – Mount Nansen whole rock and plagioclase of 72.4 ± 2.5 and 69.1 ± 2.6 Ma and Carmacks whole rocks and biotite of 73.1 ± 2.5, 67.9 ± 2.3, and 68.0 ± 2.2 Ma are concordant among themselves and agree with a Rb–Sr whole-rock date of 72.4 ± 2.1 Ma for rhyolite from the Hutshi Group in northern British Columbia.This widespread late Cretaceous volcanic episode has typical subduction-related volcanic arc chemical polarity: calc-alkaline to alkaline from active trench towards stable craton. There is a dearth of documented early to mid-Cenozoic rocks in the Yukon.

scholarly journals Late Cretaceous hydrothermal vent communities from the Troodos ophiolite, Cyprus: systematics and evolutionary significance

2021 ◽  
Author(s):  
Andrzej Kaim ◽  
Crispin T.S. Little ◽  
William J. Kennedy ◽  
Ellen M. Mears ◽  
Louise M. Anderson
Keyword(s):  
Late Cretaceous ◽  
Hydrothermal Vent ◽  
Evolutionary Significance ◽  
Troodos Ophiolite
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