نتایج جستجو برای: chadegan metamorphic complex

تعداد نتایج: 787840  

2001
Grace Bianciardi

INTRODUCTION The rocks on the Greek island of Syros are part of a suite of high pressure metamorphic rocks which outcrop all across the Cyclades. There is a complex metamorphic history recorded in the rocks here, including a Cretaceous or Eocene high-pressure blueschist event and a Miocene, extension-related greenschist overprint. The Island of Syros is mostly composed of schists , which altern...

2007
R. MICHAEL EASTON

This paper is a complement to the Tectonometamorphic Map of the Canadian Shield, and contains a brief description of the metamorphic history of Proterozoic orogenic belts and rock sequences in the Canadian Shield in Ontario, with a focus on rocks of the Southern and Grenville provinces. Metamorphism in the Southern Province has generally been attributed to the Penokean orogeny (~1879–1820 Ma), ...

2005
G. S. Lister

Several relatively thin tectono-metamorphic slices have been recognized in the Cycladic eclogite– blueschist belt, through detailed studies on Ios, Sifnos, Syros, and Tinos. A sequence of distinct metamorphic mineral growth events has been documented. These recur in each tectonic slice, although individual slices are dominated by different events. To constrain the timing of these processes, the...

Journal: :Andean Geology 2021

The El Escorial marbles (Cushamen Metamorphic Complex) along with amphibolites form metamorphic septa within the permian granitoids of Mamil Choique Formation (261-286 Ma). metamorphism, determined in granulite facies migmatic gneisses cropping out 120 km southwest Escorial, occurs at 311 ± 27 Ma (CHIME method monazite). are calcitic (calcite > 95%, R.I.: 0.5 to 2.5%) and show 87Sr/86Sr valu...

Ahmadi Khalaji, , Ebrahimi, , Esmaeili, , Homam, , Pourmohammad, , Tahmasebi, ,

The Geysour area is located east of Gonabad and is a part of the northern Lut block. The rocks in this area include granitoid and metamorphic rocks. Based on field and mineralogical evidence, the protolith of amphibolite rocks are calc-silicate. The metamorphic rocks of this region are divided into metapelites and amphibolites. Textures, such as post-tectonic garnet and random amphiboles, are i...

The Borujerd complex of western Iran is composed of intrusions and their surrounding contact aureole, with, pegmatites and quartz veins. Pegmatites differ in mineralogy, origin and age, and two groups can be distinguished. The Older Pegmatites (about 120 Ma age) intruded contact metamorphic rocks from the early magmatic stage, while the Younger pegmatites (52-70 Ma age) formed during the late m...

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The study area is located about 110 kilometers southeast of Mashhad and approximately 40 kilometers southeast of Fariman. The area is considered to be a part of the central Iran zone. It includes metamorphic rocks with different protoliths consisting of pelitic, carbonate and quartz - feldspathic rocks. The metamorphism in the study area is considered to be a contact regional metamorphism with ...

Ahmadi Khalaji, , Ebrahimi, , Esmaeili, , Homam, , Pourmohammad, , Tahmasebi, ,

Geysour area, east of Gonabad, is a part of the northern Lut block. The rocks in this area include granitoid and a series of metamorphic rocks. In metapelitic rocks, the presence of S1 schistosity and the mineral chloritoid are indicative of regional metamorphism. The presence of random textural evidence in minerals such as andalusite, staurolite, muscovite and post-tectonic garnet and silimani...

2005
ENCARNACIÓN PUGA MARK FANNING MIGUEL NIETO

Eclogites formed during the Eo-alpine metamorphic event are common within the ophiolitic unit of the Mulhacén complex, which forms part of the Betic Cordillera in southeastern Spain. A detailed study with cathodoluminescence (CL) images of zircon from these eclogites has revealed three types of domains, confirmed by some differences in their REE patterns and ages. There are a) igneous domains, ...

2015
Jikku Kuriakose Vinod

Detection of metamorphic malware is a challenging problem as a result of high diversity in the internal code structure between generations. Code morphing/obfuscation when applied, reshapes malware code without compromising the maliciousness. As a result, signature based scanners fail to detect metamorphic malware. Prior research in the domain of metamorphic malware detection utilizes similarity...

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