Ofioliti最新文献

{"title":"Geological and geochemical features of the Kopaonik intrusive complex (Vardar zone, Serbia)","authors":"M. Zélic, S. Agostini, M. Marroni, L. Pandolfi, S. Tonarini","doi":"10.4454/OFIOLITI.V35I1.385","DOIUrl":"https://doi.org/10.4454/OFIOLITI.V35I1.385","url":null,"abstract":"In the Vardar Zone of the Dinaric-Hellenic Belt, several intrusive magmatic bodies with an age spanning from Early Cretaceous to Miocene occur. One of the main bodies is represented by the Kopaonik Intrusive Complex that crops out in Southern Serbia in an area of about 90 km2. This paper deals with the geological and geochemical features of the Kopaonik Intrusive Complex, in order to provide useful constraints for its interpretation in the frame of the post-collisional magmatic activity that characterized the more internal zone of the Dinaric-Hellenic Belt.\u0000The Kopaonik intrusive complex is characterized by a dome-like structure consisting of three concentric magmatic facies, including lithotypes ranging from qtz-diorites to granodiorites and qtz-monzonites, with a gradual and continuing transition between them. The collected data indicate that the Kopaonik granitoids are I-type, with high-K calc-alkaline affinity. The origin of the intrusive complex is partially obliterated by shallow interaction between the qtzdioritic rocks and carbonate host rocks, affecting Ca-Sr contents and 87Sr/86Sr ratios. Nevertheless, the collected geological, petrographical and petrochemical data suggest a strong genetic relationship of the three facies. A minimum emplacement age of 31.5±0.3 Ma (Early Oligocene) is provided by Rb-Sr wholerock biotite age.\u0000The Kopaonik intrusives belong to a continuous Late Paleogene-Middle Miocene magmatic belt developed throughout the Balkan Peninsula from the Eastern Alps to Northwestern Turkey, and linked with subduction of the NeoTethys oceanic plate under the Eurasia. In this framework, the source of the Kopaonik magmatic rocks can be identified in a mantle wedge strongly modified by subduction-induced metasomatism.","PeriodicalId":54690,"journal":{"name":"Ofioliti","volume":"35 1","pages":"33-47"},"PeriodicalIF":1.3,"publicationDate":"2010-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70968524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tectonic setting of the Vardar suture zone (Dinaric-Hellenic belt): the example of the Kopaonik area (southern Serbia)","authors":"M. Zélic, M. Marroni, L. Pandolfi, B. Trivic","doi":"10.4454/OFIOLITI.V35I1.386","DOIUrl":"https://doi.org/10.4454/OFIOLITI.V35I1.386","url":null,"abstract":"In the tectonic setting of the Dinaric-Hellenic belt, the Vardar Zone is represented by a NW-SE to N-S striking assemblage of oceanic and continental units, each showing different metamorphic grade and deformation features. In this paper, a detailed description of the stratigraphic and structural features of the tectonic units cropping out in the Kopaonik area, belonging to the Vardar Zone of Serbia, is presented. In addition, a 1:50.000 scale geological map of the studied area is also provided. In the Kopaonik area is present a stack of tectonic units, originated during the Alpine deformation phases and referred to both External and Central Vardar Zones of Dimitrijevic´ (1997). These units are represented, from bottom to top, by the Kopaonik Metamorphic Complex, the Brzec´e Unit, the Subophiolite Melange, the Ophiolite Unit and the Brus Unit. The stack of tectonic units is intruded by Early Oligocene granitoids, referred to as the Kopaonik Intrusive Complex. Moreover, the relationships among the tectonic units are unconformably covered by Miocene volcanic rocks and sedimentary deposits. The stratigraphic and structural dataset presented in this paper allows some considerations about the paleogeographic domain of origin for the successions of the different units as well as some interpretations about the tectonic history of the Vardar Zone.","PeriodicalId":54690,"journal":{"name":"Ofioliti","volume":"35 1","pages":"49-69"},"PeriodicalIF":1.3,"publicationDate":"2010-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70968119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RADIOLARIAN AGES FOR THE SEDIMENTARY COVER OF SEVAN OPHIOLITE (ARMENIA, LESSER CAUCASUS)","authors":"G. Asatryan, T. Danelian, M. Sosson, L. Sahakyan, A. Person, A. Avagyan, G. Galoyan","doi":"10.4454/OFIOLITI.V35I2.388","DOIUrl":"https://doi.org/10.4454/OFIOLITI.V35I2.388","url":null,"abstract":"Age data of Armenian ophiolites are of great importance for understanding the palaeogeographic and geodynamic evolution of Tethys in the Caucasus area and for lateral correlations of Tethyan ophiolitic belts in the Middle East area. Moderately well-preserved radiolarian assemblages obtained during this study from the Sarinar section of eastern Armenia allow to investigate the sedimentary and volcanic history recorded in a ca. 30 m-thick radiolarite sequence associated with spilitic lavas of the Sevan ophiolitic suture zone.\u0000The latest Bajocian-early Bathonian assemblage yielded from a sample situated close to the base of the studied sequence suggests that radiolarian ooze accumulation took place on oceanic crust of late Middle Jurassic age (probably Bajocian). Several tuffite levels are intercalated within the lower to middle part of the radiolarite sequence; a late Bathonian-early Oxfordian assemblage from a sample taken just below the uppermost tuffitic bed, suggests that during this time the oceanic domain of Sevan ophiolites was close to subaerial volcanic activity.","PeriodicalId":54690,"journal":{"name":"Ofioliti","volume":"35 1","pages":"91-101"},"PeriodicalIF":1.3,"publicationDate":"2010-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70968280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"OPHIOLITES FROM THE GRAMMOS-ARRENES AREA, NORTHERN GREECE: GEOLOGICAL, PALEONTOLOGICAL AND GEOCHEMICAL DATA","authors":"G. Nirta, V. Bortolotti, M. Chiari, F. Menna, E. Saccani, G. Principi, P. Vannucchi","doi":"10.4454/OFIOLITI.V35I2.389","DOIUrl":"https://doi.org/10.4454/OFIOLITI.V35I2.389","url":null,"abstract":"The Grammos-Arrenes ophiolites crop out between the Pindos Flysch to the East and the Meso-Hellenic basin to the West and represent the northernmost exposure of the Pindos Ophiolite belt in Greece. Field work and sampling on key outcrops of the Sub-ophiolitic Melange provided new data on the oceanization age and on the geochemistry of the effusive products. The basalts samples show a N-MOR affinity and are associated with latest Bajocian-early Bathonian radiolarian cherts.\u0000Emplacement of the ophiolites onto the continental margin is preceded by mass flow deposition of ophiolitic material in the basins facing the advancing ophiolitic nappe. Ophiolite-bearing debris flow deposits and slide blocks are recognized in the Early Cretaceous deep water sediments of the Beotian Unit and in the upper portion of the Tertiary Pindos Flysch. The intercalations of ophiolitic material in the Beotian Flysch first, and in the Pindos Flysch, later, are interpreted as the forerunners of the Ophiolitic Nappe which derived from the Vardar Ocean to the east, and was emplaced westwards onto the Adria continental margin.\u0000The collected data allow consolidating the constraints for the timing and mechanism of ophiolite emplacement in the Pindos-Grammos area. In addition, taking into consideration the geometry of the tectonic stack in the Grammos-Arrenes area and the ages of the involved sedimentary deposits it is possible to reconstruct a geodynamic history comparable to that of the other zones studied along the Dinaric-Hellenic Chain.","PeriodicalId":54690,"journal":{"name":"Ofioliti","volume":"35 1","pages":"103-115"},"PeriodicalIF":1.3,"publicationDate":"2010-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70968370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PETROLOGY OF MANTLE PERIDOTITES AND INTRUSIVE MAFIC ROCKS FROM THE KERMANSHAH OPHIOLITIC COMPLEX (ZAGROS BELT, IRAN): IMPLICATIONS FOR THE GEODYNAMIC EVOLUTION OF THE NEO-TETHYAN OCEANIC BRANCH BETWEEN ARABIA AND IRAN","authors":"K. Allahyari, E. Saccani, M. Pourmoafi, L. Beccaluva, F. Masoudi","doi":"10.4454/OFIOLITI.V35I2.387","DOIUrl":"https://doi.org/10.4454/OFIOLITI.V35I2.387","url":null,"abstract":"The Kermanshah ophiolitic complex consists of a melange formation, which includes dismembered ophiolitic sequences. These ophiolites are located along the Main Zagros Reverse Fault, which marks the ophiolitic suture zone between the Zagros belt and the Sanandaj-Sirjan zone. They represent the Neo- Tethyan oceanic lithosphere, which originally existed between the Arabian (to the south) and Eurasian (to the north) continental margins. The Kermanshah ophiolites were emplaced onto platform carbonate rocks, which represented the northeastern Arabian margin.\u0000The Kermanshah ophiolitic complex is composed of various partial sequences, which are represented by: (1) mantle tectonites consisting of depleted lherzolites and both clinopyroxene- (cpx-) rich and cpx-free harzburgites; (2) a troctolite-cumulate gabbro-isotropic gabbro sequence mainly showing pegmatoid texture; (3) a wehrlite-cumulate gabbro-isotropic gabbro sequence showing foliated texture; (4) a dyke complex; (5) very scarce pillow basalts. Mantle tectonites are volumetrically predominant and tectonically overlay the gabbroic sequences. A number of conclusions may be drawn based on petrographic observations, mineral chemistry, whole-rock chemistry, and rare earth elements (REE) modelling carried out on both mantle tectonites and intrusive rock associations. (1) The Foliated Gabbro Unit has an N-MORB chemical signature and represents a portion of oceanic crust generated in a mid-ocean ridge setting from an N-MORB-type sub-oceanic mantle. (2) The Pegmatoid Gabbro Unit displays an E-MORB signature and represents a portion of oceanic crust most likely generated from a sub-oceanic mantle source enriched in light REE (LREE). A comparison with the well-studied Oman ophiolites suggests that this sequence may have formed during the early stage of oceanic spreading. (3) The depleted lherzolites present mild depletions in heavy REE (HREE) and variable depletion in LREE. REE modelling shows that they may represent a residual mantle after 15-20% removal of N-MORB melts. Some lherzolites show a moderate enrichment in La and Ce with respect to Sm, suggesting that this residual MORB mantle was subsequently trapped in a supra-subduction zone (SSZ) mantle wedge and enriched in LREE by subduction-derived fluids. (4) The depleted harzburgites present a significant depletion in incompatible elements and REE, coupled with a marked LREE enrichment with respect to medium REE. REE modelling shows that they may represent a residual mantle after 25-30% removal of boninitic-type melts in an intra-oceanic arc setting.","PeriodicalId":54690,"journal":{"name":"Ofioliti","volume":"35 1","pages":"71-90"},"PeriodicalIF":1.3,"publicationDate":"2010-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70968213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"BLUESCHISTS, ECLOGITES, OPHIOLITES AND SUTURE ZONES IN NORTHWEST TURKEY: A REVIEW AND A FIELD EXCURSION GUIDE","authors":"A. Okay, D. Whitney","doi":"10.4454/OFIOLITI.V35I2.391","DOIUrl":"https://doi.org/10.4454/OFIOLITI.V35I2.391","url":null,"abstract":"The Tavsanli Zone in western and south-central Turkey constitutes one of the largest and best preserved high-pressure metamorphic belts in the world. Blueschists and scarce lawsonite-eclogites crop out in an east-west-rending zone, 50-60 km wide and about 250 km long, and are tectonically overlain by an oceanic accretionary complex and large ophiolite slabs. Undeformed Early to Middle Eocene granodiorites (ca. 50 Ma 40Ar/39Ar isochron ages), intrude the blueschists and the overlying ophiolite. The blueschists of the Tavsanli Zone represent the subducted north-facing passive continental margin of the Anatolide- Tauride block. They were partly exposed by, or were at high crustal levels during the latest Cretaceous, prior to the Paleocene continent-continent collision. The blueschists of the Tavsanli Zone comprise a variety of metasedimentary and metamagmatic lithologies. The metasedimentary sequence, originally deposited on continental crust, comprise a schist-marble series of Mesozoic age with peak pressure and temperatures of ~24 kbar and 430-500°C, respectively, and with Late Cretaceous (ca. 80 Ma) metamorphic ages. The oceanic lithologies are made up mainly of metabasites with metacherts, phyllites, which have undergone metamorphism from incipient blueschist facies to lawsonite-eclogite facies. The guide, prepared for a three-day field trip, provides information on the tectonic setting, tectonostratigraphy, petrology, and geological evolution of the Tavsanli Zone blueschists and lawsonite-eclogites followed by detailed description of the field stops. It also includes data on the Triassic blueschists and eclogites from north of the Tavsanli Zone.","PeriodicalId":54690,"journal":{"name":"Ofioliti","volume":"35 1","pages":"131-172"},"PeriodicalIF":1.3,"publicationDate":"2010-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70968426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"GEOCHEMISTRY AND U-PB ZIRCON AGE OF THE INTERNAL OSSA-MORENA ZONE OPHIOLITE SEQUENCES: A REMNANT OF RHEIC OCEAN IN SW IBERIA","authors":"J. Pedro, A. Araújo, P. Fonseca, C. Tassinari, A. Ribeiro","doi":"10.4454/OFIOLITI.V35I2.390","DOIUrl":"https://doi.org/10.4454/OFIOLITI.V35I2.390","url":null,"abstract":"The Early Paleozoic geodynamic evolution in SW Iberia is believed to have been dominated by the opening of the Rheic Ocean. The Rheic Ocean is generally accepted to have resulted from the drift of peri-Gondwanan terranes such as Avalonia from the northern margin of Gondwana during Late CambrianEarly Ordovician times. The closure of the Rheic Ocean was the final result of a continent-continent collision between Gondwana and Laurussia that produced the Variscan orogen. The Ossa-Morena Zone is a peri-Gondwana terrane, which preserves spread fragments of ophiolites - the Internal Ossa-Morena Zones Ophiolite Sequences (IOMZOS). The final patchwork of the IOMZOS shows a complete oceanic lithospheric sequence with geochemical characteristics similar to the ocean-floor basalts, without any orogenic fingerprint and/or crustal contamination. The IOMZOS were obducted and imbricated with high pressure lithologies. Based on structural, petrological and whole-rock geochemical data, the authors argue that the IOMZOS represent fragments of the oceanic lithosphere from the Rheic Ocean. Zircon SHRIMP U-Pb geochronological data on metagabbros point to an age of ca. 480 Ma for IOMZOS, providing evidence of a well-developed ocean in SW Iberia during this period, reinforcing the interpretation of the Rheic Ocean as a wide ocean among the peri-Gondwanan terranes during Early Ordovician times.","PeriodicalId":54690,"journal":{"name":"Ofioliti","volume":"35 1","pages":"117-130"},"PeriodicalIF":1.3,"publicationDate":"2010-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70968545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MODELING THE OCEANIC LITHOSPHERE OBDUCTION: CONSTRAINTS FROM THE METAMORPHIC SOLE OF MIRDITA OPHIOLITES (NORTHERN ALBANIA)","authors":"L. Gaggero, M. Marroni, L. Pandolfi, L. Buzzi","doi":"10.4454/OFIOLITI.V34I1.376","DOIUrl":"https://doi.org/10.4454/OFIOLITI.V34I1.376","url":null,"abstract":"The Hellenic-Dinaric belt of the Eastern Mediterranean sea is characterized by huge and well preserved obducted slices of ophiolites. A well developed and very thick metamorphic sole generally occurs at the base of the obducted ophiolite sequences. The best preserved metamorphic sole of the Hellenic-Dinaric belt crops out in association with the Albanian ophiolites. In the Mirdita area (northern Albania) the metamorphic sole consists of an up to 600 m thick assemblage of metasediments and amphibolites. Four different types of amphibolites, referred as T1 to T4, have been identified on the basis of grain-size and mineralogical assemblages. The protoliths of all the amphibolites are basic rocks with OIB affinity, representative of within-plate magmatism typical of oceanic seamounts; no MORB derived rocks have been identified. The associated metasedimentary rocks are presumably derived from oceanic covers. All the lithologies from the Mirdita metamorphic sole are strongly deformed under lower to upper amphibolite facies conditions. A discontinuous inverted gradient is observed close to harzburgites in the metamorphic sole, that shows high-grade amphibolite facies metamorphism. There are no prograde greenschist facies metamorphic rocks, although all the lithologies from the Mirdita metamorphic sole are affected by greenschist facies retrogression. The different types of amphibolites display different P and T values at metamorphic climax conditions. The temperatures range from 624±9° to 796±50°C in the different units where the pressure is always lower than 0.7 GPa. The boundaries between the amphibolite slices with different peak metamorphism as well as the bodies of the gneisses and micaschists are sheared bands. The structural pattern common to all lithologies identified in the Mirdita metamorphic sole developed through two deformation phases under amphibolite facies conditions, followed by a third phase under greenschist facies. The petrologic and structural characteristics of the metamorphic sole are discussed in order to highlight the kinematics of the obduction process.","PeriodicalId":54690,"journal":{"name":"Ofioliti","volume":"34 1","pages":"17-42"},"PeriodicalIF":1.3,"publicationDate":"2009-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70967587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"THE OPHIOLITE-BEARING MÉLANGE IN THE EARLY TERTIARY PINDOS FLYSCH OF ETOLIA (CENTRAL GREECE)","authors":"V. Bortolotti, Nicola Carras, M. Chiari, M. Fazzuoli, M. Marcucci, G. Nirta, G. Principi, E. Saccani","doi":"10.4454/OFIOLITI.V34I2.380","DOIUrl":"https://doi.org/10.4454/OFIOLITI.V34I2.380","url":null,"abstract":"In Etolia (Central Greece), west of the Parnassus/Vardoussia units, the Pindos succession crops out, with its higher formation: the Pindos Flysch. In its upper portion levels of debris flow deposits and slide blocks (olistostromes and olistoliths) contain ophiolitic material with fragments derived from the Parnassus/ Vardussia formations.\u0000This ophiolitic material consists of serpentinites, basalts of WPB, E- and N-MOR affinity, and radiolarian cherts of Middle-Late Triassic and Middle-Late Jurassic age. Petrologic and biostratigraphic analyses confirm that the melange has the same features of the sub-ophiolitic melanges present at the base of the ophiolitic masses in Greece. Linked to the flysch, with contacts of unclear nature, a rhyolites body of Middle Triassic age indicates the continental nature of the Pindos Basin. In fact, here, as all over the Albanian-Greek section of the Dinarides, no record of an oceanic area in the central portion of the Dinarides exists: the Parnassus and Vardoussia units were directly thrust onto the Pindos Basin.\u0000The intercalations of ophiolitic and continent-derived material in the flysch, are interpreted as the forerunners of the Ophiolitie Nappe which, coming from the Vardar Ocean located to the east, reached during the Eocene the Pindos Basin.","PeriodicalId":54690,"journal":{"name":"Ofioliti","volume":"61 1","pages":"83-94"},"PeriodicalIF":1.3,"publicationDate":"2009-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70968000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"FROM MAGMATIC TO METAMORPHIC DEFORMATIONS IN A JURASSIC OPHIOLITIC COMPLEX: THE BRACCO GABBROIC MASSIF, EASTERN LIGURIA (ITALY)","authors":"F. Menna","doi":"10.4454/OFIOLITI.V34I2.382","DOIUrl":"https://doi.org/10.4454/OFIOLITI.V34I2.382","url":null,"abstract":"A new structural study with multiscale detailed analysis of the main elements of the fabric was performed on the Bracco ophiolitic massif (Eastern Liguria). The results are here presented with a reconstruction of the sequence of events which characterized the evolution of the gabbroic complex, starting form the first magmatic phases up to the late metamorphic ones, through a retrograde path which ended with the final exposure of the gabbro on the ocean floor. The field observations, supported by petrographic analyses, lead to outline for the Bracco Gabbroic Complex a deformative evolution which started in the early magmatic phases; the study of the metamorphic structures, following the intrusion and the syn-magmatic deformation of the gabbroic complex, allowed to identify three distinct metamorphic phases, whose petrographic features show that the associated deformations could actually represent a continuous evolution of the same tectonic phenomenon, which started under granulitic facies conditions, continued in amphibolitic facies and ended with deformations and recrystallizations in greenschist facies conditions.","PeriodicalId":54690,"journal":{"name":"Ofioliti","volume":"34 1","pages":"109-130"},"PeriodicalIF":1.3,"publicationDate":"2009-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70968089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}