Petrogenesis of the Puerto Edén Igneous and Metamorphic Complex, Magallanes, Chile: Late Jurassic syn-deformational anatexis of metapelites and granitoid magma genesis

Lithos ◽  
2007 ◽  
Vol 93 (1-2) ◽  
pp. 17-38 ◽  
Author(s):  
M. Calderón ◽  
F. Hervé ◽  
H.-J. Massonne ◽  
C.G. Tassinari ◽  
R.J. Pankhurst ◽  
...  
Keyword(s):  
Late Jurassic ◽  
Metamorphic Complex ◽  
Magma Genesis ◽  
Granitoid Magma

Use of in situ Hf-isotope analyses of zircon to interpret granitoid magma genesis

2006 ◽  
Vol 70 (18) ◽  
pp. A437
Author(s):  
V. Murgulov ◽  
W.L. Griffin ◽  
S.Y. O’Reilly
Keyword(s):  
Hf Isotope ◽  
Magma Genesis ◽  
Granitoid Magma ◽  
Isotope Analyses

The geology of Cape Dubouzet, northern Antarctic Peninsula: continental basement to the Trinity Peninsula Group?

1996 ◽  
Vol 8 (4) ◽  
pp. 407-414 ◽  
Author(s):  
Francisco Hervé ◽  
Jorge Lobato ◽  
Ignacio Ugalde ◽  
Robert J. Pankhurst
Keyword(s):  
Antarctic Peninsula ◽  
Late Jurassic ◽  
Volcanic Rocks ◽  
Metamorphic Rocks ◽  
Low Grade ◽  
Metamorphic Complex ◽  
Calc Alkaline ◽  
Magmatic Arc ◽  
The Antarctic ◽  
The Trinity

Cape Dubouzet is mainly composed of a volcanic-subvolcanic complex of extrusive rhyolitic breccias, a banded rhyolite and a semi-annular body of dacite porphyry rich in xenoliths of metamorphic rocks. Major and REE geochemistry indicate that the volcanic rocks are calc-alkaline and that they are genetically related by fractional crystallization of a plagioclase-bearing assemblage from a common magma. Rb-Sr data suggest that the rhyolitic complex is of Middle-to-Late Jurassic age, and that it is intruded by Late Cretaceous stocks of banded diorite and gabbro. All these rocks are partially covered by moraines whose clasts are of local provenance. Xenoliths in the dacite porphyry suggest that the northern tip of the Antarctic Peninsula is underlain by a metamorphic complex composed of amphibolites, meta-tonalites and pelitic gneiss containing garnet, sillimanite, cordierite, hercynite, and andalucite. Such rocks are not known in the Scotia metamorphic complex, nor in the Trinity Peninsula Group and its low grade metamorphic derivatives, which also occur as rare xenoliths in the dacite. Previous dating of xenoliths collected from the moraines suggested a late Carboniferous age for this amphibolite-grade metamorphism. Both the Jurassic-Cenozoic magmatic arc of the Antarctic Peninsula and the accretionary complex rocks of the Trinity Peninsula Group were thus developed, at least in part, over pre-existing continental crust.

Middle and Late Jurassic Radiolarians from Nadanhada Terrane of Eastern Heilongjiang Province, Northeastern China

2019 ◽  
Vol 23 (4) ◽  
pp. 291 ◽  
Author(s):  
Gang Li ◽  
Atsushi Matsuoka ◽  
Qun Yang ◽  
Jingeng Sha
Keyword(s):  
Late Jurassic ◽  
Northeastern China ◽  
Heilongjiang Province

The Zirconometry and Thermochronology of Migmatized Gneisses of the Gondaray Metamorphic Complex (Greater Caucasus)

2020 ◽  
Vol 75 (5) ◽  
pp. 481-495
Author(s):  
V. Yu. Gerasimov ◽  
V. A. Snezhko ◽  
J. Mosar ◽  
A. N. Pismennyi ◽  
N. L. Enna ◽  
...  
Keyword(s):  
Metamorphic Complex ◽  
Greater Caucasus
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