Eclogite contains no plagioclase although its protolith is full of this mineral. The protoliths of eclogites are igneous rocks with a basaltic composition ( ...
Eclogite : A high P/T metamorphic rock composed of more than 75% vol. garnet (often ... Subsequent work on the more diverse protolith compositions revealed, ...
Physical and chemical processing of eclogite: protolith and pre-subduction inheritance versus subduction-related deformation and alteration of oceanic crust.
eclogite, any member of a small group of igneous and metamorphic rocks whose composition is similar to that of basalt. Eclogites consist primarily of green ...
Dikes or sills of tholeiite basalts having geochemical characteristics of E-MORB could be the protoliths for the Maksyutov eclogites. (C) 2003 Elsevier Ltd. All ...
Omphacite distinguishes eclogite from other plagioclase-free garnet-clinopyroxene-rich mantle rocks, such as garnet-pyroxenites. The origin of cratonic mantle ...
Pillow lavas containing an eclogitic mineral assemblage, locally with glaucophane/crossite, are described from the Tsäkkok Lens within the Seve Nappes.
The Triassic eclogite-bearing central Qiangtang metamorphic belt (CQMB) in the ... Continental arc-related protolith of the Baqing eclogite.
#11.
evidence of a metamorphosed primitive Cretac - Redalyc
The geochemistry of eclogites can be used to constrain the tectonic setting in which the protoliths formed prior to being taken into the subduction path ...
#12.
Eclogites
Eclogite appears to be moderately common in portions of the upper mantle, but it occurs ... burial metamorphism (mantle depths) of a Proterozoic protolith.
#13.
Geochemical and Nd isotopic constraints for the origin of ...
Last Peak eclogite protoliths; and (3) west-dipping subduction of the Slide Mountain ... cators of the tectonic affinity of an eclogite protolith is insuf-.
#14.
The protoliths of central Himalayan eclogites | GSA Bulletin
A detailed investigation of the protolith nature of these eclogites is needed to better understand pre-Himalayan geological history.
#15.
Protoliths and metamorphism of the central Himalayan eclogites
Geochemical data suggest that the eclogite protoliths are most consistent ... Inherited magmatic zircon cores from the eclogites give a protolith age of ...
#16.
Eclogite - MantlePlumes.org
The window is even broader for Si-poor eclogites such as cumulates and many non-MORB protoliths. If the lower mantle is denser than pyrolite ( ...
#17.
Health & Environmental Research Online (HERO) | US EPA
Metamorphic evolution and the composition of the protolith of plagioclase-bearing eclogite-amphibolites of the Buchim block of the ...
#18.
and continental-type eclogites in the North Qaidam orogen ...
... oceanic-type UHP eclogites in the North Qaidam orogen, northern Tibet. ... between the two types of eclogites in their protolith origin.
#19.
Geochemistry Of Shanderman Eclogite, Constrains On ... - SID.ir
Shanderman eclogites are exposed at the west of Shanderman town, Talesh Mountains in the north of Iran. Protoliths of these rocks had basaltic composition.
#20.
Subduction and exhumation of Luliangshan eclogite ... - Publons
The protolith of eclogite have geochemical characteristics similar to those of normal mid-ocean ridge basalt (N-MORB); and the varying ...
#21.
Geochemistry of eclogitised Fe-Ti-gabbros from various ...
Protolith composition and eclogitic paragenesis ... derive from similar magmatic protoliths with ... ophiolites with an eclogite-facies overprint (i.e..
#22.
The earliest evidence for modern-style plate tectonics ... - NCBI
We provide evidence that the mafic protolith of the eclogite formed at ... Eclogites are high-pressure metamorphic rocks mainly composed of ...
#23.
Eclogite: Mineral information, data and localities. - Mindat.org
A high P/T metamorphic rock composed of more than 75% vol. garnet (often pyrope or Mg-rich almandine) and omphacite (Na-Ca-Al-Mg clinopyroxene).
#24.
Caledonian eclogite-facies metamorphism of early Proterozoic ...
Caledonian eclogite-facies metamorphism of early Proterozoic protoliths from the North-East Greenland Eclogite Province. Contributions to Mineralogy and ...
#25.
Protolith and Metamorphic Age of the Sieggraben Eclogites ...
The Austroalpine eclogite-bearing Sieggraben Complex, exposed at the eastern margin of the Eastern Alps, is considered to represent a ...
#26.
Nature and age of pre-Variscan eclogite protoliths from the Low
and associated amphibolites. The aims of this paper are to define the age of the eclogite protolith, compare the chemistry of the eclogitic rocks from the ...
#27.
Two epochs of eclogite metamorphism link 'cold' oceanic ...
Two rock types of eclogitic protoliths have been identified in the North Qaidam UHPM belt: (1) the. 850–820 Ma continental flood basalts (CFBs) with.
#28.
NJG 61-70 - Norwegian Journal of Geology
Geochemical comparisons of coronitic olivine gabbro and eclogites: metamorphic effects and the origin of eclogite protoliths (Flemsøy, Sunnmøre, ...
#29.
Orogenic Eclogites Record Relative Magnitude of Deep ...
We combine in situ U-Pb petrochronology (zircon, Zrn; rutile, Rt) and O-isotope analyses (garnet, Grt; Zrn) of key eclogite phases to investigate the protoliths ...
#30.
Sr–Pb–O Isotope and Trace-element Investigations of Eclogite ...
2·2 Ga Stacey–Kramers model age are consistent with Paleoproterozoic protolith oceanic crust formation. Eclogite xenoliths and eclogitic diamond inclusions from ...
#31.
Protoliths and metamorphism of the central Himalayan eclogites
The high-pressure (HP) eclogites in the central Himalaya provide insights ... Geochemical data suggest that the eclogite protoliths are most ...
#32.
Two contrasting eclogite cooling histories, North Qaidam HP ...
Positive eNd values from two Yuka and five Xitieshan eclogites indicate a depleted mantle source, consistent with formation of the eclogite protoliths in a ...
#33.
Geological Characteristic and Protolith Nature of Yuqia ...
Geological Characteristic and Protolith Nature of Yuqia Eclogite-type Rutile Deposit in Northern Qaidam UHP Metamorphic Belt. LIN Chenggui 1, ...
#34.
Geochemistry and U–Pb protolith ... - E-Prints Complutense
Abstract: Recent data indicating that the Piaxtla Suite (Acatlán Complex, southern Mexico) underwent eclogite-facies metamorphism and exhumation during the ...
#35.
Geochemistry of eclogite- and blueschist-facies ... - UQ eSpace
Trace element data suggest that the eclogite protoliths include both enriched and normal mid-oceanic ridge basalt (E-MORB and N-MORB) and also gabbroic ...
#36.
Bulletin of the Geological Society of Greece - eJournals
GEOCHEMISTRY AND TECTONIC SETTING OF ECLOGITE PROTOLITHS FROM KECHROS COMPLEX IN EAST RHODOPE ... eclogites amphibolitized eclogites Kechros Complex Rhodope.
#37.
Geochemistry of eclogite- and blueschist ... - Kyushu University
Trace element data suggest that the eclogite protoliths include both enriched and normal mid-oceanic ridge basalt (E-MORB and N-MORB) and also ...
#38.
Constraint on the eclogite age of the Sanbagawa ...
To constrain the timing from the accretion to the subduction-related metamorphism of the protolith in the Sanbagawa eclogites, we performed zircon U–Pb ...
#39.
U-Pb Age and Hf Isotope Systematics of Zircon from ... - MDPI
Keywords: eclogite xenolith; kimberlite; zircon; U–Pb age; Hf isotopes; ... The nature of the eclogite protolith remains unresolved, ...
#40.
Rutile in eclogites as a mineral resource in the Sunnfjord ...
under eclogite-facies metamorphism and thereafter variably affected by retrograde processes. ... represent relics of the eclogite protolith. Fig. 3 shows an.
#41.
Cratonic eclogite xenoliths - formation and evolution of the ...
The whole-rock trace element composition is consistent with a pyroxenitic protolith. Eclogites that contain coesite, kyanite and corundum (coe-ky-cor) are ...
#42.
Evidence from eclogites and probable ophiolite
The Sumdo eclogite belt was found recently in the Lhasa block, ... protolith of the eclogites experienced a matamorphic process from.
#43.
XI International Eclogite Conference (IEC) Dominican Republic
Geochemical and high-precision isotope geochronological studies suggest that the protolith of the Yuka eclogites has within-plate basalt (WPB) ...
File:Eclogite (Muenchberg Gneiss Massif; Early Ordovician protolith, about 480 Ma; Late Devonian metamorphism, about 365 Ma; Wissenstein, just south of ...
#45.
Geochemical comparisons of coronitic olivine gabbro and ...
(1985) interpreted the geo chemical variations of eclogites in the Stadtlandet area in terms of tectonical emplacement of dif ferent eclogite protoliths into ...
#46.
Protolith of the Stak eclogite in the northwestern Himalaya
The protoliths of ultra-high pressure eclogites in the Kaghan and Tso Morari massifs in northwestern Himalaya are also interpreted to be the Panjal Traps.
#47.
geochemistry and metamorphic evolution of eclogites on syros ...
potential variations in eclogite protolith and constraining PTt paths using omphacite- garnet-phengite geothermobarometry of high-.
#48.
Lithos - DOI
Pb zircon and geochemical constraints on Late Devonian Back-arc basin origin of eclogite protoliths from northeastern Hainan Island, ...
#49.
Мetamorphic Evolution and the Composition of the Protolith of ...
Mineral equilibria are studied in plagioclase-bearing eclogite-amphibolites and associated garnet-clinopyroxene-amphibolc-plagioclase ...
#50.
From opening to subduction of an oceanic domain ... - HAL-Insu
opening and expansion of oceanic domains, whereas eclogite-facies ... 1985), the protolith of this eclogite is not a mafic rock and its ...
#51.
Zircon U–Pb Dating and Lu-Hf Isotope of the Retrograded ...
Zircon Lu-Hf isotopic of εHf from the Chicheng eclogite has larger span range from 6.0 to 18.0, which suggests that the magma of the eclogite protolith may ...
#52.
Evolution of eclogite facies metamorphism in the St. Cyr ...
SHRIMP-RG zircon dating shows that the protolith of the eclogites formed within the Yukon-Tanana terrane during early, continental arc activity, ...
#53.
Origin of high-Mg bimineralic eclogite xenoliths in kimberlite
The assumption that some bimineralic eclogites represent protoliths that formed as little-differentiated melts in ancient ocean floors (Aulbach ...
#54.
Deep crustal source of gneiss dome revealed by ... - NSF PAR
protolith mafic magma composition and history and/or the duration of metamorphic ... tion about protoliths of the eclogite.
#55.
"Two Contrasting Eclogite Cooling Histories, North Qaidam ...
Zircon U–Pb TIMS and SHRIMP geochronology, combined with CL and inclusion analysis indicates a magmatic protolith age of ca. 750–800 Ma, and eclogite–facies ...
#56.
Whitney-EGU20 for upload
Deep-crustal relics such as orogenic eclogites and HP granulites are archives of ... The two eclogites record the same age of protolith (inferred gabbro) ...
#57.
Geochronology and tectonic implications of the Urgamal ...
This suggests that the eclogite protolith is slightly older than the recorded metamorphic and igneous activity in the Zavkhan autochthon ...
#58.
[PDF] Protolith of the Stak eclogite in the northwestern Himalaya
This paper reports the major, minor and trace element abundances and Nd isotope compositions of bulk rock samples of eclogites from the Stak ...
#59.
The Les Essarts eclogite-bearing metamorphic Complex ...
#60.
Mineral ages and P-T conditions of Late Paleozoic high ...
Geochemical data and an initial εNd value of ∼ +9 suggest an N-MORB protolith for the eclogite. The high-pressure mineral assemblage of the eclogite ...
#61.
Oceanic lithosphere origin without a crustal signature
Eclogite formation beneath the northern Slave craton constrained by ... Following partial melt extraction, the eclogite protoliths were subducted into the ...
#62.
2018LYSES004.pdf
of eclogite mineral assemblage, showing retrogressed kelyphitic and symplectitic textures ... regarding the possible protolith of eclogite xenoliths.
#63.
Geochemistry and U–Pb protolith ... - Open Research Online
Geochemistry and U–Pb protolith ages of eclogitic rocks of the Asís Lithodeme, Piaxtla Suite, Acatlán Complex, southern Mexico: tectonothermal activity ...
#64.
Eclogite and blueschist in the southern New England Fold Belt
Lastly, analysis of Sm–Nd isotopes from the protoliths to the high-P rocks at Port Macquarie are used to identify the affinities of the metamorphic precursors.
#65.
Metamorphic Rocks | Geological Society of Glasgow
Protoliths may be igneous, sedimentary or pre-existing metamorphic rocks. ... For example, blueschist and eclogite facies rocks form under low to medium ...
#66.
Просмотр записей
For eclogites of the Kokchetav massif, the Sm-147/Nd-144 ratio was found to ... as a result of contamination of the eclogite protolith by the host rocks.
#67.
New constraints on the origin and age of Variscan eclogitic ...
than the protolith age testify to metamorphic re-crys- tallisation (or new growth) from ... Keywords Variscan Ж Eclogite Ж Gabbro Ж Zircon.
#68.
Age, tectonic setting and fluid–rock interactions
New occurrence of UHP eclogites in Limousin (French Massif Central): ... ing eclogite protoliths, are common in the Variscan belt of Western.
#69.
Eclogite (Muenchberg Gneiss Massif; Early Ordovician proto…
Eclogite (Muenchberg Gneiss Massif; Early Ordovician protolith, about 480 Ma; Late Devonian metamorphism, about 365 Ma; Weissenstein, Bavaria, Germany) 2 ...
#70.
U-Pb Age and Hf Isotope Systematics of Zircon from Eclogite ...
rated from small eclogite xenoliths found in Devonian kimberlites within ... Mesoarchean to Paleoarchean ages for the eclogite protolith.
#71.
Oxygen isotope zoning in garnets from Franciscan eclogite ...
the composition of the eclogite protolith. The abrupt ... Keywords Franciscan Complex Á Eclogite Á Garnet Á. Oxygen isotopes Á SIMS.
#72.
Eclogite formation and the rheology, buoyancy, seismicity, and ...
persistence of gabbroic rocks into the blueschist and eclogite stability fields ... model with zeolite-facies basalt and amphibolite-facies gabbro protolith.
#73.
Deep crustal source of gneiss dome ... - Experts@Minnesota
Possible explanations for differences in the two eclogites relate to differences in the protolith mafic magma composition and history and/or the ...
#74.
Deep crustal source of gneiss dome revealed by ... - Hal-Um
450 Ma, the same as host gneiss protolith age), whereas dome-core eclogite zircon has more scarce preservation of inherited zircon.
#75.
Kyanite/corundum eclogites from the Kaapvaal Craton
In addition, we place age constraints on the protoliths and make inferences about the nature of the parental ancient oceanic crust and its sub-.
#76.
Isotope-Geochemical Evidence for the Nature of ... - Gale
Nd] (T)-T coordinates, eclogites were shown to form trends that can be interpreted as a result of contamination of the eclogite protolith by the host rocks.
#77.
Geology Word of the Week: E is for Eclogite - Georneys - AGU ...
Eclogite : A high-pressure, high-temperature, coarse-grained metamorphic rock consisting primarily of pink-red garnet (almadine-pyrope variety) ...
#78.
Types of Metamorphism, Protoliths, Textures, & Classification
#79.
Metamorphism: New Rocks from Old - SlidePlayer
Metamorphic Rocks Foliated Protolith Process = Product Basalt + low T, high P = Blueschist (blue amphibole) Blueschist + high T and P = Eclogite (green ...
#80.
eclogite facies metamorphism: Topics by Science.gov
These ages indicate that the protolith of the Altyn eclogite probably ... and eclogite-facies rocks representing different protoliths ...
#81.
Deformation Mechanisms, Rheology and Tectonics: From ...
... therefore , only a com- made the protolith granulite - facies minerals ... The granulite - eclogite facies some close units were still being buried to ...
#82.
Crust-Mantle and Lithosphere-Asthenosphere Boundaries: ...
We suggest that Sambagawa eclogite-facies rocks may represent two types: large ... The Franciscan complex, where protoliths of the youngest HP metamorphic ...
#83.
Eclogite
Eclogite. Eclogite is a dense, green plutonic rock composed of coarse grains of green, sodium-rich pyroxene (omphacite) and pale pink, magnesium rich garnet ...
eclogite protolith 在 Types of Metamorphism, Protoliths, Textures, & Classification 的推薦與評價
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