Xiao, Yilin

[["dc.bibliographiccitation.firstpage","1505"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","Journal of Petrology"],["dc.bibliographiccitation.lastpage","1527"],["dc.bibliographiccitation.volume","43"],["dc.contributor.author","Xiao, Y. L."],["dc.contributor.author","Hoefs, Jochen"],["dc.contributor.author","van den Kerkhof, A. M."],["dc.contributor.author","Simon, Klaus"],["dc.contributor.author","Fiebig, J."],["dc.contributor.author","Zheng, Y."],["dc.date.accessioned","2018-11-07T10:16:29Z"],["dc.date.available","2018-11-07T10:16:29Z"],["dc.date.issued","2002"],["dc.description.abstract","The Dabie Shan ultrahigh-pressure (UHP) metamorphic terrane is located in the eastern part of the east-west-striking Qinling-Dabie orogenic belt in China. A major mylonitized contact zone of 200-300 m width divides Dabie Shan into the South Dabie Terrane (SDT) and the North Dabie Complex (NDC). Combined investigation of major and trace element geochemistry, fluid inclusions, and oxygen and hydrogen isotopes constrains the fluid history during the metamorphic evolution of the two metamorphic belts, which differ in their fluid and metamorphic evolution. Fluid inclusions in rocks from the SDT are mainly aqueous with varying salinities, whereas those from the NDC are dominated by CO2. Low delta(18)O values in the SDT rocks (-2.8 to 8.6parts per thousand) indicate meteoric water-rock interactions before UHP metamorphism, whereas rocks from the NDC show 'normal' delta(18)O values (6.7-9.0parts per thousand) with no obvious meteoric water-rock signature. Whole-rock rare earth element (REE) contents correlate with oxygen isotope compositions: samples from the SDT have higher REE contents and lower delta(18)O values, whereas samples from the NDC have lower REE contents and higher delta(18)O values. During retrograde metamorphism fluids with different hydrogen isotope compositions interacted with the rocks from the SDT."],["dc.identifier.doi","10.1093/petrology/43.8.1505"],["dc.identifier.isi","000177226600004"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/41048"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Oxford Univ Press"],["dc.relation.issn","0022-3530"],["dc.title","Fluid evolution during HP and UHP metamorphism in Dabie Shan, China: Constraints from mineral chemistry, fluid inclusions and stable isotopes"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","198"],["dc.bibliographiccitation.journal","Journal of Asian Earth Sciences"],["dc.bibliographiccitation.lastpage","221"],["dc.bibliographiccitation.volume","78"],["dc.contributor.author","Xu, L."],["dc.contributor.author","Xiao, Yilin"],["dc.contributor.author","Wu, Fei"],["dc.contributor.author","Li, Shuguang"],["dc.contributor.author","Simon, Klaus"],["dc.contributor.author","Woerner, Gerhard"],["dc.date.accessioned","2018-11-07T09:16:32Z"],["dc.date.available","2018-11-07T09:16:32Z"],["dc.date.issued","2013"],["dc.description.abstract","The Late Jurassic Jingshan granite located at the south-eastern margin of the North China Craton contains abundant garnets which can be subdivided into three types based on texture and composition: (i) euhedral garnet in mafic biotite and garnet rich enclave (Grt I), (ii) coarse-grained garnet (Grt II) in the host granite, and (iii) small euhedral garnet in aplite (Grt III). In general, Grt I has higher FeO, CaO and lower MnO contents than Grt II. Grt III has higher Mn, but lower Ca contents than others. Grt I has lower MREE and HREE contents than Grt II. Grt III has prominent and distinctly negative Eu anomaly as well as higher MREE composition compared to the others. Systematic variations in oxygen isotope compositions are observed among the three garnet types, with delta O-18 values of <3.8%, in most of Grt I, 3.8-4.7%, in most Grt II (for inclusion-free garnets), and typically >4.7%, in Grt III. Some of the Grt ll and Grt III display two distinct zonings with cores having similar major and trace element compositions to Grt I. Cathodoluminescence (CL) images revealed that the zircons from different garnet-bearing samples possess fine-scale oscillatory zoned magmatic rims with inherited cores. In situ zircon U-Pb dating and trace element analyses show that the dark-luminescent magmatic rims all have Jurassic concordia ages (similar to 160 Ma) and similar trace element patterns. Most of the inherited cores also display similar Triassic ages of 210-236 Ma, which is similar to the ages of ultrahigh pressure (UHP) metamorphic rocks of the Dabie-Sulu orogen (230 Ma). In addition, Jurassic concordia ages were also found in a zircon inclusion in Grt I, implying that the Grt I was formed shortly before the main magmatic event. The age data suggest that the three different garnet types may be genetically related and modified by cogenetic magmatic events. Based on the zircon U-Pb ages from different garnet,bearing samples, the major element, trace element, oxygen isotope, and zoning textures of the three kinds of garnet we suggest that Grt I may be peritectic garnet, whereas Grt II and III are probably the results of magmatic dissolution-precipitation processes and re-equilibration of garnets with changing magmatic conditions during melting, differentiation, crystallization, and cooling within the granite. We conclude from the oxygen isotopic character of the garnets and ages of the zircons that the source rocks for the Jingshan granites are from Dabie-Sulu orogen representing the South China Craton. (C) 2012 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.jseaes.2012.11.026"],["dc.identifier.isi","000327804600013"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/27959"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","1878-5786"],["dc.relation.issn","1367-9120"],["dc.title","Anatomy of garnets in a Jurassic granite from the south-eastern margin of the North China Craton: Magma sources and tectonic implications"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","421"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Contributions to Mineralogy and Petrology"],["dc.bibliographiccitation.lastpage","441"],["dc.bibliographiccitation.volume","152"],["dc.contributor.author","Zhang, Z."],["dc.contributor.author","Xiao, Yilin"],["dc.contributor.author","Hoefs, Jochen"],["dc.contributor.author","Liou, J. G."],["dc.contributor.author","Simon, Klaus"],["dc.date.accessioned","2018-11-07T09:09:25Z"],["dc.date.available","2018-11-07T09:09:25Z"],["dc.date.issued","2006"],["dc.description.abstract","The main hole (MH) of the Chinese Continental Scientific Drilling Project (CCSD) in southern Sulu has penetrated into an ultrahigh-pressure (UHP) metamorphic rock slice which consists of orthogneiss, paragneiss, eclogite, ultramafic rock and minor schist. Recovered eclogites have a UHP metamorphic mineral assemblage of garnet + omphacite + rutile +/- phengite +/- kyanite +/- coesite +/- epidote. Ultramafic rocks contain garnet + olivine + clinopyroxene + orthopyroxene +/- Ti-clinohumite +/- phlogopite. Gneisses and schists contain an amphibolite-facies paragenesis, but their zircons have coesite, garnet, omphacite (or jadeite) and phengite inclusions, indicating that eclogites and gneisses have been subjected to in situ UHP metamorphism. Using available geothermobarometers, P-T estimates of 3.1-4.4 GPa and 678-816 degrees C for eclogites were obtained. If surface outcrops and neighboring shallow drill holes are considered together, we suggest that a huge supracrustal rock slab (> 50 km long x 100 km wide x 5 km deep) was subducted to a depth > 100 km and then exhumed to the surface. The depth interval (0-2,050 m) of the CCSD-MH can be divided into six lithological units. Unit 1 consists of alternating layers of quartz-rich and rutile-rich eclogites, with thin interlayers of gneiss and schist. Eclogites of unit 1 are characterized by Nb, Ta, Sr and Ti depletions, low Mg number and general LREE enrichment. Unit 2 comprises rutile- and ilmenite-rich eclogite and minor \"normal\" eclogite and is characterized by high TiO2, total Fe, V, Co and Sr, and very low SiO2, alkali, Zr, Ba, Nb, Ta and total REE contents, and LREE-depleted REE patterns with slightly positive Eu anomalies. Unit 3 contains ultramafic rock and minor MgO-rich eclogite. Protoliths of UHP rocks from units 1, 2 and 3 represent a layered mafic to ultramafic intrusion at crustal depth. Units 4 and 6 consist of interlayered eclogite and paragneiss; the eclogites are characterized by Th, U, Nb, Ta and Ti depletion and K enrichment and LREE-enriched REE patterns. Paragneisses show Nb, Ta, Sr and Ti depletions and LREE-enriched REE patterns occasionally with slightly negative Eu anomalies, indicating that their protoliths represent metamorphic supracrustal series. Unit 5 consists mainly of orthogneisses, showing distinct Nb, Ta, Sr and Ti depletions, and LREE-enriched REE patterns with pronounced negative Eu anomalies, suggesting granitic protoliths. In conclusion it is proposed that the southern Sulu UHP belt consists of a series of meta-supracrustal rocks, a layered mafic-ultramafic complex and granites."],["dc.identifier.doi","10.1007/s00410-006-0120-5"],["dc.identifier.isi","000240548000002"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/26257"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0010-7999"],["dc.title","Ultrahigh pressure metamorphic rocks from the Chinese Continental Scientific Drilling Project: I. Petrology and geochemistry of the main hole (0-2,050 m)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","123"],["dc.bibliographiccitation.journal","Journal of Asian Earth Sciences"],["dc.bibliographiccitation.lastpage","140"],["dc.bibliographiccitation.volume","89"],["dc.contributor.author","Liu, Lei"],["dc.contributor.author","Xiao, Yilin"],["dc.contributor.author","Woerner, Gerhard"],["dc.contributor.author","Kronz, A."],["dc.contributor.author","Simon, Klaus"],["dc.contributor.author","Hou, Zhenhui"],["dc.date.accessioned","2018-11-07T09:37:28Z"],["dc.date.available","2018-11-07T09:37:28Z"],["dc.date.issued","2014"],["dc.description.abstract","This study explores the potential of detrital rutile geochemistry and thermometry as a provenance tracer in rocks from the Central Dabie ultrahigh-pressure metamorphic (UHPM) zone in east-central China that formed during Triassic continental collision. Trace element data of 176 detrital rutile grains selected from local river sediments and 91 rutile grains from distinct bedrocks in the Shuanghe and Bixiling areas, obtained by both electron microprobe (EMP) and in situ LA-ICP-MS analyses, suggest that geochemical compositions and thermometry of detrital rutiles are comparable to those from their potential source rocks. After certification of the Cr-Nb discrimination method for the Central Dabie UHPM zone, we show that 29% of the detrital rutiles in the Shuanghe area were derived from metamafic sources whereas in the Bixiling area that it is up to 76%. Furthermore, the proportion of distinct types of detrital rutiles combined with modal abundances of rutile in metapelites and metamafic bedrocks can be used to estimate the proportion of different source lithologies. Based on this method the proportion of mafic source rocks was estimated to similar to 10% at Shuanghe and >60% at Bixiling, respectively, which is consistent with the proportions of eclogite (the major rutile-bearing metamafic rock) distribution in the field. Therefore, the investigation of detrital rutiles is a potential way to evaluate the proportion of metamafic rocks and even to prospect for metamafic bodies in UHPM terranes. Zr-in-rutile temperatures were calculated at different pressures and compared with temperatures derived from rock-in rutiles and garnet-clinopyroxene Fe-Mg thermometers. Temperatures calculated for detrital rutiles range from 606 degrees C to 707 degrees C and 566 degrees C to 752 degrees C in Shuanghe and Bixiling, respectively, at P= 3 GPa with an average temperatures of ca. 630 degrees C for both areas. These temperature averages and ranges are similar to those calculated for rutiles from surrounding source rocks. Combined with comparable Zr distribution characteristics between detrital and source rock rutiles, demonstrating a close source-sediment link for rutiles from clastic and rock in UHPM terranes. Thus rutiles can be accurate tracers of source rock lithologies in sedimentary provenance studies even at a small regional scale. In Bixiling, Nb/Ta ratios of metamafic and metapelitic detrital rutiles fall between 11.0 to 27.3 and 7.7 to 20.5, respectively. In contrast, in Shuanghe, these ratios are highly variable, ranging from 10.9 to 71.0 and 7.6 to 87.1, respectively. When ignoring four outlier compositions with extremely high Nb/Ta in Shuanghe, a distinct clustering of Nb/Ta ratios in rutiles is shown: metapelitic detrital rutiles have Nb/Ta of 7-40 vs. metamafic detrital rutiles with Nb/Ta = 11-25. The Nb/ Ta characteristics in detrital rutiles from both areas may reflect the degree of fluid-rock interaction during metamorphism and/or different source lithologies. Therefore, the trace element compositions in detrital rutiles can accurately trace the lithology, proportion and fluid-rock interaction of different source rocks. (C) 2014 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.jseaes.2014.04.003"],["dc.identifier.isi","000337207200011"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/32848"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","1878-5786"],["dc.relation.issn","1367-9120"],["dc.title","Detrital rutile geochemistry and thermometry from the Dabie orogen: Implications for source-sediment links in a UHPM terrane"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["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"]]

[["dc.bibliographiccitation.firstpage","797"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Contributions to Mineralogy and Petrology"],["dc.bibliographiccitation.lastpage","819"],["dc.bibliographiccitation.volume","162"],["dc.contributor.author","Xiao, Yilin"],["dc.contributor.author","Hoefs, Jochen"],["dc.contributor.author","Hou, Zhenhui"],["dc.contributor.author","Simon, Klaus"],["dc.contributor.author","Zhang, Z."],["dc.date.accessioned","2018-11-07T08:51:32Z"],["dc.date.available","2018-11-07T08:51:32Z"],["dc.date.issued","2011"],["dc.description.abstract","In order to better understand the role of fluids during subduction and subsequent exhumation, we have investigated whole-rock and mineral chemistry (major and trace elements) and Li, B as well as O, Sr, Nd, Pb isotopes on selected continuous drill-core profiles through contrasting lithological boundaries from the Chinese Continental Scientific Drilling Program (CCSD) in Sulu, China. Four carefully selected sample sets have been chosen to investigate geochemical changes as a result of fluid mobilization during dehydration, peak metamorphism, and exhumation of deeply subducted continental crust. Our data reveal that while O and Sr-Nd-Pb isotopic compositions remain more or less unchanged, significant Li and/or B isotope fractionations occur between different lithologies that are in close contact during various metamorphic stages. Samples that are supposed to represent prograde dehydration as indicated by veins formed at high pressures (HP) are characterized by element patterns of highly fluid-mobile elements in the veins that are complementary to those of the host eclogite. A second sample set represents a UHP metamorphic crustal eclogite that is separated from a garnet peridotite by a thin transitional interface. Garnet peridotite and eclogite are characterized by a > 10% difference in MgO, which, together with the presence of abundant hydroxyl-bearing minerals and compositionally different clinopyroxene grains demonstrate that both rocks have been derived from different sources that have been tectonically juxtaposed during subduction, and that hydrous silicate-rich fluids have been added from the subducting slab to the mantle. Two additional sample sets, comprising retrograde amphibolite and relatively fresh eclogite, demonstrate that besides external fluids, internal fluids can be responsible for the formation of amphibolite. Li and B concentrations and isotopic compositions point to losses and isotopic fractionation during progressive dehydration. On the other hand, fluids with isotopically heavier Li and B are added during retrogression. On a small scale, mantle-derived rocks may be significantly metasomatized by fluids derived from the subducted slab. Our study indicates that during high-grade metamorphism, Li and B may show different patterns of enrichment and of isotopic fractionation."],["dc.identifier.doi","10.1007/s00410-011-0625-4"],["dc.identifier.isi","000294704900008"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/7320"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/21955"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0010-7999"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Fluid/rock interaction and mass transfer in continental subduction zones: constraints from trace elements and isotopes (Li, B, O, Sr, Nd, Pb) in UHP rocks from the Chinese Continental Scientific Drilling Program, Sulu, East China"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","4770"],["dc.bibliographiccitation.issue","18"],["dc.bibliographiccitation.journal","Geochimica et Cosmochimica Acta"],["dc.bibliographiccitation.lastpage","4782"],["dc.bibliographiccitation.volume","70"],["dc.contributor.author","Xiao, Yilin"],["dc.contributor.author","Sun, Weidong"],["dc.contributor.author","Hoefs, Jochen"],["dc.contributor.author","Simon, Klaus"],["dc.contributor.author","Zhang, Z."],["dc.contributor.author","Li, Shuguang"],["dc.contributor.author","Hofmann, Albrecht W."],["dc.date.accessioned","2018-11-07T09:15:17Z"],["dc.date.available","2018-11-07T09:15:17Z"],["dc.date.issued","2006"],["dc.description.abstract","The formation of the continental crust (CC) is one of the most important processes in the evolution of the silicate Earth. Exactly how the CC formed is the subject of ongoing debate that focuses on its subchondritic Nb/Ta ratio. Nb and Ta are \"geochemical identical twins,\" so they usually do not fractionate from each other. Here, we show that rutile grains from hydrous rutile-bearing eclogitic layers recovered from drillcores in the Dabie-Sulu ultrahigh pressure terrain have highly variable Nb/Ta values (ranging from 5.4 to 29.1, with an average of 9.8 +/- 0.6), indicating major fractionation of Nb and Ta most likely occurred during blueschist to amphibole-eclogite transformation in the absence of rutile. It is suggested that the released fluids with subchondritic Nb/Ta were transported to, and retained by, hydrous rutile-bearing eclogite in colder regions, resulting in suprachondritic Nb/Ta ratios for drier eclogite in hotter regions. Further dehydration of hydrous rutile-bearing eclogites cannot transfer the fractionated Nb/Ta values to the CC due to the low solubility of Nb and Ta in fluids in the presence of rutile, while dehydration-melting results in a major component of the CC, the tonalite-trondhjemite-granodiorite (TTG) component, which is responsible for the low Nb/Ta of the CC. Consequently, residual eclogites have variable but overall suprachondritic Nb/Ta. (c) 2006 Elsevier Inc. All rights reserved."],["dc.identifier.doi","10.1016/j.gca.2006.07.010"],["dc.identifier.isi","000241001400012"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/27647"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0016-7037"],["dc.title","Making continental crust through slab melting: Constraints from niobium-tantalum fractionation in UHP metamorphic rutile"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]