Now showing 1 - 7 of 7
  • 2003Journal Article
    [["dc.bibliographiccitation.firstpage","2018"],["dc.bibliographiccitation.issue","18"],["dc.bibliographiccitation.journal","Chinese Science Bulletin"],["dc.bibliographiccitation.lastpage","2023"],["dc.bibliographiccitation.volume","48"],["dc.contributor.author","Shen, K."],["dc.contributor.author","Zhang, Z. M."],["dc.contributor.author","van den Kerkhof, Alfons M."],["dc.contributor.author","Xiao, Y. L."],["dc.contributor.author","Xu, Z. Q."],["dc.contributor.author","Hoefs, Jochen"],["dc.date.accessioned","2018-11-07T10:36:23Z"],["dc.date.available","2018-11-07T10:36:23Z"],["dc.date.issued","2003"],["dc.description.abstract","Primary high-density fluid inclusions were identified in garnet from ultrahigh pressure eclogite in the southern part of the Sulu terrane. They occur isolatedly or in cluster together with relatively low-density two-phase inclusions. The eutectic temperature of the inclusions is as low as less than or equal to-52degreesC. A bubble was nucleated in a liquid inclusion during the specific stage of cyclic cooling-heating runs, and the liquid-gas homogenization temperature was measured to be less than or equal to-12.5degreesC. The composition of the inclusions modeled by the system CaCl2-NaCl-H2O, yields the fluid density of 1.27 g/cm(3) that corresponds to a pressure of ca. 2.4 GPa at the temperature of peak eclogite-facies metamorphism, close to the ultrahigh pressure metamorphic conditions. During the exhumation of the eclogite the inclusions reacted with the host mineral, forming hydrous silicate minerals that resulted in lowering of the fluid density and its transformation to multi-phase inclusions."],["dc.identifier.doi","10.1360/02wd0536"],["dc.identifier.isi","000185748100023"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/45311"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Science China Press"],["dc.relation.issn","1001-6538"],["dc.title","Unusual high-density and saline aqueous inclusions in ultrahigh pressure metamorphic rocks from Sulu terrane in eastern China"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]
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  • 2005Journal Article
    [["dc.bibliographiccitation.firstpage","297"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","International Geology Review"],["dc.bibliographiccitation.lastpage","309"],["dc.bibliographiccitation.volume","47"],["dc.contributor.author","Zhang, Z. M."],["dc.contributor.author","Shen, K."],["dc.contributor.author","Xiao, Y. L."],["dc.contributor.author","van den Kerkhof, Alfons M."],["dc.contributor.author","Hoefs, Jochen"],["dc.contributor.author","Liou, J. G."],["dc.date.accessioned","2018-11-07T11:19:57Z"],["dc.date.available","2018-11-07T11:19:57Z"],["dc.date.issued","2005"],["dc.description.abstract","Rocks from the first pre-pilot hole of the Chinese Continental Scientific Drilling Project (CCSD-PPH1, 432 in), located in the eastern part of the Dabie-Sulu ultrahigh-pressure (UHP) metamorphic belt, have been subjected to a coesite-eclogite-facies metamorphic event, followed by an amphibolite-facies overprint. Primary fluid inclusions occur in garnet, omphacite, and apatite from eclogite; in kyanite and in topaz from quartzite; and in garnet, epidote, and apatite from paragneiss. Secondary fluid inclusions are present in all lithologies. Fluid inclusions are absent from ultramafic rocks. Based on fluid compositions and textural criteria we distinguished: (1) low-salinity aqueous-carbonic inclusions in topaz from quartzite, which may have originated from a supracrustal protolith; (2) primary CaCl2-NaCl-rich brine inclusions in garnet and in omphacite from eclogite and in kyanite from quartzite, representing UHP metamorphic fluids; (3) high-salinity aqueous-carbonic inclusions in quartz from eclogite and quartzite, representing amphibolite-facies fluids; (4) aqueous fluids of low- and intermediate salinity trapped as primary inclusions in garnet, epidote (or allanite) and apatite from gneiss, or as secondary inclusions, representing amphibolite-facies and later retrograde fluids; (5) carbonic inclusions are distributed along transgranular fractures in quartz from quartzite, and probably represent the latest retrograde fluid. The diversity in fluid inclusion populations and compositions from different vertical depths suggests a closed fluid system without large-scale fluid migration during UHP metamorphism. However, the common low- and medium-salinity inclusions in most rock types suggests that a water-dominated fluid from an external source infiltrated into the rock system during amphibolite-facies metamorphism, resulting in extensive retrogression of the UHP rocks."],["dc.identifier.doi","10.2747/0020-6814.47.3.297"],["dc.identifier.isi","000227403000005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/55414"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","V H Winston & Son Inc"],["dc.relation.issn","0020-6814"],["dc.title","Fluid composition and evolution attending UHP metamorphism: Study of fluid inclusions from drill cores, southern Sulu Belt, Eastern China"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]
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  • 2005Journal Article
    [["dc.bibliographiccitation.firstpage","1160"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","International Geology Review"],["dc.bibliographiccitation.lastpage","1177"],["dc.bibliographiccitation.volume","47"],["dc.contributor.author","Zhang, Z. M."],["dc.contributor.author","Xiao, Y. L."],["dc.contributor.author","Hoefs, Jochen"],["dc.contributor.author","Xu, Z. Q."],["dc.contributor.author","Liou, J. G."],["dc.date.accessioned","2018-11-07T10:54:40Z"],["dc.date.available","2018-11-07T10:54:40Z"],["dc.date.issued","2005"],["dc.description.abstract","The Pre-pilot Hole No. 1 of the Chinese Continental Scientific Drilling Project (CCSD-PPH1) in the southern Sulu terrane recovered a continuous core of eclogite, garnet peridotite, orthogneiss, paragneiss, and minor schist and quartzite. Geochemical characteristics indicate that the garnet peridotite was derived from depleted mantle; all other rock types are metamorphosed supracrustal rocks with continental affinities. The eclogite consists of garnet, omphacite, phengite, quartz (coesite), amphibole, rutile, and zircon; P-T estimates of peak metamorphism are 785-820 degrees C and >2.7 to 3.7 GPa. The gneisses show common amphibolite-facies mineral assemblages consisting of plagioclase, K-feldspar, muscovite, and quartz, with minor garnet, epidote (or zoisite), and biotite; coesite inclusions in zircon indicate that the gneisses together with eclogites were subjected to an early UHP metamorphism prior to amphibolite-facies retrogression. The Garnet peridotites show porphyroblastic textures, and consist mainly of garnet, clinopyroxene, orthopyroxene, and olivine with minor phlogopite. Garnet and clinopyroxene porphyroblasis show significant compositional zoning. Applying relevant geothermobarometers, core compositions of the minerals indicate P-T conditions of 6.0-7.0 GPa and 1100-1200 degrees C. For the rim, similar or slightly higher P-T conditions compared to the eclogites were obtained. We suggest that the former represent crystallization conditions of garnet peridotite in the upper mantle, whereas the latter reflect reequilibrium conditions during incorporation of mantle rocks into the subducted slab. We conclude that the garnet peridotite may have been derived from the mantle wedge above the subduction zone. If so, these mantle-derived rocks were sandwiched between continental-derived country rocks."],["dc.identifier.doi","10.2747/0020-6814.47.11.1160"],["dc.identifier.isi","000232750200005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/49618"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","V H Winston & Son Inc"],["dc.relation.issn","0020-6814"],["dc.title","Petrogenesis of UHP metamorphic crustal and Mande rocks from the Chinese Continental Scientific Drilling Pre-pilot Hole 1, Sulu belt, eastern China"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]
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  • 2005Journal Article
    [["dc.bibliographiccitation.firstpage","189"],["dc.bibliographiccitation.issue","1-4"],["dc.bibliographiccitation.journal","Lithos"],["dc.bibliographiccitation.lastpage","207"],["dc.bibliographiccitation.volume","81"],["dc.contributor.author","Zhang, Z. M."],["dc.contributor.author","Xiao, Y. L."],["dc.contributor.author","Liu, F. L."],["dc.contributor.author","Liou, J. G."],["dc.contributor.author","Hoefs, Jochen"],["dc.date.accessioned","2018-11-07T11:12:52Z"],["dc.date.available","2018-11-07T11:12:52Z"],["dc.date.issued","2005"],["dc.description.abstract","Five kinds of UHP metamorphic rocks, including eclogite, orthogneiss, paragneiss, schist and quartzite are exposed in the Qinglongshan roadcut, southern Sulu orogenic belt of eastern central China. They comprise metamorphic supracrustal rocks with bimodal volcanic characteristics and continental affinity, and granitic intrusive associations. The preservation of coesite inclusions and/or its pseudomorphs in eclogite and other rocks indicate that they have been subjected to in-situ UHP metamorphism. Four stages of metamorphism were recognized by combining petrographic observations and compositions of minerals from various UHP rocks. Prograde epidote-amphibolite facies, UHP coesite-eclogite facies, post UHP quartz-eclogite facies, and retrograde amphibolite facies assemblages delineate an inferred P-T path with a clockwise trajectory and a retrograde event characterized by the coupling of decompression with a temperature decrease. Garnet porphyroblasts in UHP eclogites display a complex growth zoning and mineral distribution, and record a crucial segment of the prograde and retrograde metamorphic evolution. The preservation of growth zoning in eclogitic and gneissic gamets suggests that the UHP rocks had a short residence time before retrograde metamorphism and a very high uplift rate in order to preserve the prograde growth zoning. (c) 2004 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.lithos.2004.10.002"],["dc.identifier.isi","000228418000009"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/53760"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","0024-4937"],["dc.title","Petrogenesis of UHP metamorphic rocks from Qinglongshan, southern Sulu, east-central China"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]
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  • 2006Conference Abstract
    [["dc.bibliographiccitation.issue","18"],["dc.bibliographiccitation.journal","Geochimica et Cosmochimica Acta"],["dc.bibliographiccitation.volume","70"],["dc.contributor.author","Sun, Weidong"],["dc.contributor.author","Xiao, Y. L."],["dc.contributor.author","Hoefs, Jochen"],["dc.contributor.author","Simon, Klaus"],["dc.contributor.author","Zhang, Z. M."],["dc.contributor.author","Li, S. G."],["dc.date.accessioned","2018-11-07T09:28:35Z"],["dc.date.available","2018-11-07T09:28:35Z"],["dc.date.issued","2006"],["dc.format.extent","A629"],["dc.identifier.doi","10.1016/j.gca.2006.06.1167"],["dc.identifier.isi","000241374201504"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/30813"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.publisher.place","Oxford"],["dc.relation.conference","16th Annual V M Goldschmidt Conference"],["dc.relation.eventlocation","Melbourne, AUSTRALIA"],["dc.relation.issn","0016-7037"],["dc.title","Nb/Ta fractionation in rutile from eclogites"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]
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  • 2005Conference Paper
    [["dc.bibliographiccitation.firstpage","857"],["dc.bibliographiccitation.issue","5-6"],["dc.bibliographiccitation.journal","American Mineralogist"],["dc.bibliographiccitation.lastpage","863"],["dc.bibliographiccitation.volume","90"],["dc.contributor.author","Zhang, Z. M."],["dc.contributor.author","Rumble, D."],["dc.contributor.author","Liou, J. G."],["dc.contributor.author","Xiao, Y. L."],["dc.contributor.author","Gao, Y. J."],["dc.date.accessioned","2018-11-07T11:01:38Z"],["dc.date.available","2018-11-07T11:01:38Z"],["dc.date.issued","2005"],["dc.description.abstract","The Qinglongshan O- and H-isotope anomaly occurs within a coesite-bearing, eclogite-facies regional metamorphic belt in Eastern China near Donghai in Jiangsu province. The anomaly is defined by low values of delta(18)O and delta D. Garnets from eclogite have delta(18)O as low as -11 parts per thousand and rutiles are -15 parts per thousand (VSMOW). Phengites have delta D of -120 parts per thousand (VSMOW). The anomaly is Neoproterozoic in age. Surface outcrops of coesite-eclogite-facies rocks with unusually low delta(18)O and delta D values extend over an area of at least 1600 km(2). The Chinese Continental Scientific Drilling project has made it possible to investigate the depth of the Qinglongshan anomaly and to measure an O-isotope profile across a garnet peridotite body sandwiched between crustal rocks. New O-isotope analyses of minerals separated from drill core gneisses, eclogites, amphibolite, and quartzite verify that the Qinglongshan O-isotope anomaly extends to a depth of at least 432 in. Crustal rocks with unusually low PO form both the hanging- and foot-walls of a 100 m thick, fault-bounded, garnet peridotite body intersected by the drill. Minerals of the garnet peridotite body have delta(18)O values indistinguishable from mantle nodules and megacrysts. The garnet peridotites may have originated from enriched mantle sources in sub-cratonic lithosphere, isolated from mantle convection. This origin is consistent with the collision of the Archean Sino-Korean craton with the Yangtze plate, consequent subduction, and UHP metamorphism. The garnet peridotite was transported from the mantle and emplaced into UHP crustal rocks during Triassic subduction and cratonic collision."],["dc.identifier.doi","10.2138/am.2005.1650"],["dc.identifier.isi","000229305300009"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/51192"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Mineralogical Soc Amer"],["dc.publisher.place","Washington"],["dc.relation.conference","Annual Meeting of the Geological-Society-of-America"],["dc.relation.eventlocation","Seattle, WA"],["dc.relation.issn","0003-004X"],["dc.title","Oxygen isotope geochemistry of rocks from the pre-pilot hole of the Chinese Continental Scientific Drilling Project (CCSD-PPH1)"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]
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  • 2005Journal Article
    [["dc.bibliographiccitation.firstpage","809"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","ACTA PETROLOGICA SINICA"],["dc.bibliographiccitation.lastpage","818"],["dc.bibliographiccitation.volume","21"],["dc.contributor.author","Zhang, Z. M."],["dc.contributor.author","Xiao, Y. L."],["dc.contributor.author","Shen, K."],["dc.contributor.author","Gao, Y. J."],["dc.date.accessioned","2018-11-07T11:01:17Z"],["dc.date.available","2018-11-07T11:01:17Z"],["dc.date.issued","2005"],["dc.description.abstract","Garnet porphyroblasts with complex growth zonation and mineral inclusion are recognized in the ultrahigh-pressure (UHP) eclogites from Donghai area, southern Sulu orogenic belt. By investigating of petrography and mineral chemistry, four metamorphic stages have been revealed. They are the prograde epidote-amphibolite facies, coesite-eclogite facies, retrograde quartz-eclogite facies and amphibolite facies metamorphism. Using the compositions of the mantle segment of porphyroblastic garnets (with the lowest Fe/Mg ratio) and adjacent omphacite inclusion, and the related geothermobarometers, P-T conditions of > 900 degrees C and 4.1 similar to 4.5GPa are estimated for the stage of UHP metamorphism. Combining with the P-T conditions of other stages of metamorphism, a clockwise P-T path are reconstructed. It is characterized by the prograde trajectory is parallel nearly to the segment of retrogression, and the early retrograde metamorphism with coupling of decompression with a temperature decrease. Preservation of the growth zoning of eclogitic garnets suggests that the UHP rocks have a short residence time before the retrograde metamorphism and have a very high uplift rate. A temperature decrease during the early retrograde metamorphism of the UHP eclogites may be another favorable condition for preservation of garnet growth zoning."],["dc.identifier.isi","000231179000020"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/51115"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Science Press"],["dc.relation.issn","1000-0569"],["dc.title","Garnet growth compositional zonation and metamorphic P-T path of the ultrahigh-pressure eclogites from the Sulu orogenic belt, eastern Central China."],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]
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