نتایج جستجو برای: greenschist facies

تعداد نتایج: 5585  

Journal: :Minerals 2023

The massive sulfide deposits (VMS) from Mănăilă are associated with the metamorphic formations of Tulgheș Lithogroup Bucovinian Nappes Crystalline-Mesozoic Zone in Eastern Carpathians, Romania. following types ore were identified: pyrite-polymetallic, pyrite copper, compact and precompact quartz-precompact copper. polymetallic mineralization consists pyrite, chalcopyrite, sphalerite, galena, su...

2004
E.M.W. Skinner J. S. Marsh

Field and Scott Smith [Field, M., Scott Smith, B.H., 1999. Contrasting geology and near-surface emplacement of kimberlite pipes in southern Africa and Canada. Proc. 7th Int. Kimb. Conf. (Eds. Gurney et al.) 1, 214–237.] propose that kimberlite pipes can be grouped into three types or classes. Classical or Class 1 pipes are the only class with characteristic low temperature, diatreme-facies kimb...

Journal: :journal of sciences islamic republic of iran 0

the kahnuj ophiolitic complex, a part of the jazmurian ophiolitic belt, is located on the western boundary of the jazmurian depression and is bounded by two major fault systems. there is a well-preserved, ophiolite pseudostratigraphy of early cretaceous to early palaeocene age and has a bearing on the mesozoic development of southeastern part of iran and adjacent region. the kahnuj ophiolitic c...

2011
Mei Han Yong Zhao Gaoming Li Albert C. Reynolds

Identification of the geological facies and their distribution from seismic and other available geological information is important during the early stage of reservoir development (e.g. decision on initial well locations). Traditionally, this is done by manually inspecting the signatures of the seismic attribute maps, which is very time-consuming. This paper proposes an application of the Expec...

The Kahnuj ophiolitic complex, a part of the Jazmurian ophiolitic belt, is located on the western boundary of the Jazmurian depression and is bounded by two major fault systems. There is a well-preserved, ophiolite pseudostratigraphy of early Cretaceous to early Palaeocene age and has a bearing on the Mesozoic development of southeastern part of Iran and adjacent region. The Kahnuj ophiolitic c...

ابرهانسلی, رولند , حاجی علی اوغلی, رباب, مؤذن, محسن , محمدزاده, بهنام ,

The studied area is located in the west Azerbaijan Province at north-west of Serow town. Variety of metamorphic rocks including metabasites, marbles and metaperidotites crop out in the area. The metabasites are metamorphosed under greenschist to amphibolite facies. The metamorphosed calcareous rocks are mainly marble in which calcite form more than 90% volume of the rocks. The metaperidotites a...

Journal: :journal of sciences islamic republic of iran 0
sh. shafiei

in order to investigate deformation history preserved in the calcite twins in the hinterland of zagros, several samples have been collected from calcschists of the paleozoic sargaz complex in the faryab area, se iran. these samples are related to f1-recumbent folding and thrust shear zones. the twin width is about 1 and 3.8 µm (thin-twin regime); the twin strain amounts 5 and 10%; twin intensit...

2016
I. Campaña A. Pérez-González A. Benito-Calvo J. Rosell R. Blasco J. M. Bermúdez de Castro E. Carbonell J. L. Arsuaga

Gran Dolina is a cavity infilled by at least 25 m of Pleistocene sediments. This sequence contains the TD6 stratigraphic unit, whose records include around 170 hominin bones that have allowed the definition of a new species, Homo antecessor. This fossil accumulation was studied as a single assemblage and interpreted as a succession of several human home bases. We propose a complete stratigraphi...

Journal: :Geosciences 2021

Moine metasedimentary rocks of northern Scotland are characterized by arcuate map patterns mineral lineations that swing progressively clockwise from orogen-perpendicular E-trending in greenschist facies mylonites above the thrust on foreland edge Caledonian Orogen, to S-trending at higher structural levels and metamorphic grades hinterland. Quartz c-axis fabrics measured a west east coast tran...

Journal: :Canadian Journal of Earth Sciences 2022

The Ellsworth belt is one of several fault-bounded blocks exposed along the southeastern coast Maine that formed within Ganderia. New ID-TIMS U–Pb geochronological data integrated with field relationships provide additional insights into timing magmatism and deformation in belt. deformed Lamoine Granite was selected for zircon analysis to: (i) establish protolith age; (ii) direct temporal const...

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