Now showing 1 - 10 of 41
  • 2005Journal Article
    [["dc.bibliographiccitation.firstpage","28"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Geofluids"],["dc.bibliographiccitation.lastpage","41"],["dc.bibliographiccitation.volume","5"],["dc.contributor.author","Moller, P."],["dc.contributor.author","Woith, H."],["dc.contributor.author","Dulski, P."],["dc.contributor.author","Luders, V."],["dc.contributor.author","Erzinger, J."],["dc.contributor.author","Kampf, H."],["dc.contributor.author","Pekdeger, A."],["dc.contributor.author","Hansen, B."],["dc.contributor.author","Lodemann, M."],["dc.contributor.author","Banks, D."],["dc.date.accessioned","2018-11-07T08:28:01Z"],["dc.date.available","2018-11-07T08:28:01Z"],["dc.date.issued","2005"],["dc.description.abstract","The pilot hole (VB) of the German Continental Deep Drilling Program (KTB) was drilled to a depth of 4000 m, where large amounts of free fluids were met. The KTB-VB 4000 m fluid can be related to either Mesozoic sea-water or formation water from Permo-Carboniferous sedimentary rocks of the Weiden embayment. During the Upper Cretaceous uplift of the Bohemian Massif both fluids could have passed organic-rich Triassic to Carboniferous formations of the Weiden embayment before invading the uplifted and fractured basement rocks of Devonian amphibolites and metagabbros, where the chemical composition of the fluids was changed by albitization, adularization, and chloritization. Results of chemical mass balances for both sources are presented. In order to concentrate the formation water from the Weiden embayment significant amphibolitization has to be assumed. During a 1-year pumping test the chemical composition of the 4000 m fluids remained constant. The accuracy of chemical analyses is critically reviewed. An improved preconcentration method of rare earth elements and yttrium in high-Ca-bearing saline fluids is described."],["dc.identifier.doi","10.1111/j.1468-8123.2004.00104.x"],["dc.identifier.isi","000227363500004"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/16325"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Blackwell Publ Ltd"],["dc.relation.issn","1468-8115"],["dc.title","Main and trace elements in KTB-VB fluid: composition and hints to its origin"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]
    Details DOI WOS
  • 2015Conference Abstract
    [["dc.bibliographiccitation.journal","Meteoritics and Planetary Science"],["dc.bibliographiccitation.volume","50"],["dc.contributor.author","Wannek, D. L. M."],["dc.contributor.author","Reimold, W. U."],["dc.contributor.author","Thirlwall, M."],["dc.contributor.author","Hansen, Bent T."],["dc.contributor.author","Schulz, T."],["dc.contributor.author","Hoffmann, M."],["dc.contributor.author","Zaag, P. T."],["dc.contributor.author","Hauser, Natalie"],["dc.contributor.author","Siegert, S."],["dc.date.accessioned","2018-11-07T09:53:56Z"],["dc.date.available","2018-11-07T09:53:56Z"],["dc.date.issued","2015"],["dc.identifier.isi","000358591900350"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/36432"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell"],["dc.publisher.place","Hoboken"],["dc.relation.conference","78th Annual Meeting of the Meteoritical-Society"],["dc.relation.eventlocation","Berkeley, CA"],["dc.title","ARE THERE TWO TYPES OF VREDEFORT GRANOPHYRE?"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]
    Details WOS
  • 2001Journal Article
    [["dc.bibliographiccitation.firstpage","139"],["dc.bibliographiccitation.issue","2-3"],["dc.bibliographiccitation.journal","Acta Hydrochimica et Hydrobiologica"],["dc.bibliographiccitation.lastpage","152"],["dc.bibliographiccitation.volume","29"],["dc.contributor.author","Wiegand, Bettina"],["dc.contributor.author","Dietzel, Martin"],["dc.contributor.author","Bielert, Ulrich"],["dc.contributor.author","Groth, Peter"],["dc.contributor.author","Hansen, Bent T."],["dc.date.accessioned","2018-11-07T08:46:19Z"],["dc.date.available","2018-11-07T08:46:19Z"],["dc.date.issued","2001"],["dc.description.abstract","Groundwater of the Quaternary unconsolidated sediments in the catchment area of the waterworks of Liebenau II (NW-Germany) is characterized by heterogeneous distributions of dissolved constituents, In order to determine sources of solutes and to estimate flowpaths, Sr isotope analyses were carried out on groundwater, precipitation, and soil samples. Sr-87/Sr-86 ratios of the groundwater samples vary between 0.708 and 0.719 and allow to discriminate four groundwater levels. The near-surface groundwater level is characterized by low Sr-87/Sr-86 ratios in the range of 0.7099 and 0.7130. At greater depths Sr-87/Sr-86 ratios increase up to a value of 0.7187 in the intermediate groundwater level. Deep groundwaters which can be divided into two levels exhibit a remarkable decrease of Sr-87/Sr-86 ratios. Groundwater of deep level I shows Sr isotope ratios between 0.7118 and 0.7128, whereas deep level II shows Sr-87/Sr-86 ratios of 0.7082 to 0.7087. Differences in the Sr-87/Sr-86 ratios are the result of varying sources of dissolved strontium in the groundwater. These encompass mineral weathering, precipitation, and anthropogenic inputs. Low Sr-87/Sr-86 ratios of 0.710 to 0.713 indicate the influence of precipitation and probably fertilizers on the near-surface groundwaters. At greater depths, groundwater chemistry is dominated by weathering processes. Due to significant differences in the Sr-87/Sr-86 ratios the dissolution of silicate minerals can be distinguished from the dissolution of carbonate minerals. For the intermediate groundwater level a dominant influence of silicate weathering is confirmed by radiogenic Sr-87/Sr-86 ratios between 0.713 and 0.719 and saturation indices < -3.5 for calcite. In contrast, low Sr-87/Sr-86 ratios of 0.708 to 0.709 indicate dissolution of carbonate minerals in the deep groundwater, where saturation for calcite is observed. A schematic diagram of groundwater flowpaths basing on the analyzed Sr-87/Sr-86 ratios, and geochemical parameter is displayed. The main aquifer is represented by gravel-bearing sands which form the base of the Quaternary deposits. A good agreement in the chemical and isotopic composition of groundwater from wells EB9, EB7 and groundwater of the deep level I indicates the dominance of groundwater pumping from depths of 20 to 35 meters. Deep groundwater levels are partially separated from the near-surface groundwater by intercalations of silt and clay lenses in the intermediate aquifer. These intercalations are characterized by a reduced permeability and longer residence time of groundwater. Vertical transport of solutes is partially reduced. This is confirmed by the larger variation of Sr-87/Sr-86 ratios in vertical direction compared to the rather constant isotope ratios in horizontal flow direction."],["dc.description.abstract","Grundwässer aus den quartären Lockersedimenten im Einzugsgebiet des Wasserwerkes Liebenau II (NW‐Deutschland) sind durch heterogene Verteilungen der gelösten Inhaltsstoffe charakterisiert. Zur Bestimmung der Herkunft der Lösungskomponenten und zur Ermittlung von Grundwasserfließwegen wurden Sr‐Isotopenuntersuchungen an Grundwässern, Niederschlagswässern und Sedimentproben durchgeführt. Die 87Sr/86Sr‐Verhältnisse der Grundwässer liegen im Bereich von 0.708 bis 0.719 und ermöglichen eine Unterscheidung von vier Grundwasserhorizonten. Unterschiede in den 87Sr/86Sr‐Verhältnissen resultieren aus verschiedenen Quellen des gelösten Strontiums im Grundwasser. Diese sind geprägt durch die Mineralverwitterung, die Niederschläge und anthropogene Einträge. Für den oberflächennahen Grundwasserbereich sind Einflüsse aus den Niederschlägen und vermutlich aus der landwirtschaftlichen Düngung durch niedrige 87Sr/86Sr‐Verhältnisse zwischen 0.710 und 0.713 indiziert. Mit zunehmender Tiefe dominieren Verwitterungsprozesse die Grundwasserchemie. Über das 87Sr/86Sr‐Verhältnis kann zwischen Silikat‐ und Karbonatauflösung unterschieden werden. Im mittleren Grundwasserhorizont bestätigen hohe 87Sr/86Sr‐Verhältnisse zwischen 0.713 und 0.719 und Sättigungsindices < –3.5 für Calcit den Einfluss verwitternder Silikate. Niedrige 87Sr/86Sr‐Verhältnisse von 0.708 bis 0.709 bei gleichzeitig hohem Sättigungsgrad für Calcit sind auf die Auflösung von Karbonatmineralen in den tiefen Grundwässern zurückzuführen."],["dc.identifier.doi","10.1002/1521-401X(200109)29:2/3<139::AID-AHEH139>3.0.CO;2-Z"],["dc.identifier.isi","000171273000008"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/20663"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","Najko"],["dc.relation.issn","0323-4320"],["dc.title","Sr-87/Sr-86 ratios as a tracer for geochemical processes in an unconsolidated sediment aquifer (Liebenau, NW-Germany)"],["dc.title.alternative","87Sr/86Sr‐Verhältnisse als Tracer für geochemische Prozesse in einem Lockergesteinsaquifer (Liebenau, NW‐Deutschland)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]
    Details DOI WOS
  • 2007Conference Abstract
    [["dc.bibliographiccitation.issue","15"],["dc.bibliographiccitation.journal","Geochimica et Cosmochimica Acta"],["dc.bibliographiccitation.volume","71"],["dc.contributor.author","Kleinhanns, Ilka C."],["dc.contributor.author","Nolte, Nicole"],["dc.contributor.author","Baero, Wiebke"],["dc.contributor.author","Hansen, Bent Tauber"],["dc.date.accessioned","2018-11-07T11:00:00Z"],["dc.date.available","2018-11-07T11:00:00Z"],["dc.date.issued","2007"],["dc.identifier.isi","000248789901197"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/50829"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.publisher.place","Oxford"],["dc.relation.conference","17th Annual V M Goldschmidt Conference"],["dc.relation.eventlocation","Cologne, GERMANY"],["dc.title","Is dehydration melting responsible for the evolution of high-K granitic melts throughout the Precambrian?"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]
    Details WOS
  • 2017Journal Article
    [["dc.bibliographiccitation.firstpage","266"],["dc.bibliographiccitation.journal","Geochimica et Cosmochimica Acta"],["dc.bibliographiccitation.lastpage","281"],["dc.bibliographiccitation.volume","214"],["dc.contributor.author","Reimold, Wolf Uwe"],["dc.contributor.author","Hauser, Natalia"],["dc.contributor.author","Hansen, Bent T."],["dc.contributor.author","Thirlwall, Matthew"],["dc.contributor.author","Hoffmann, Marie"],["dc.date.accessioned","2019-07-22T14:33:34Z"],["dc.date.available","2019-07-22T14:33:34Z"],["dc.date.issued","2017"],["dc.description.abstract","Besides impact melt rock, several large terrestrial impact structures, notably the Sudbury (Canada) and Vredefort (South Africa) structures, exhibit considerable occurrences of a second type of impact-generated melt rock, so-called pseudotachylitic breccia (previously often termed “pseudotachylite” – the term today reserved in structural geology for friction melt in shear or fault zones). At the Vredefort Dome, the eroded central uplift of the largest and oldest known terrestrial impact structure, pseudotachylitic breccia is well-exposed, with many massive occurrences of tens of meters width and many hundreds of meters extent. Genesis of these breccias has been discussed variably in terms of melt formation due to friction melting, melting due to decompression after initial shock compression, decompression melting upon formation/collapse of a central uplift, or a combination of these processes. In addition, it was recently suggested that they could have formed by the infiltration of impact melt into the crater floor, coming off a coherent melt sheet and under assimilation of wall rock; even seismic shaking has been invoked. Field evidence for generation of such massive melt bodies by friction on large shear / fault zones is missing. Also, no evidence for the generation of massive pseudotachylitic breccias in rocks of low to moderate shock degree by melting upon pressure release after shock compression has been demonstrated. The efficacy of seismic shaking to achieve sufficient melting as a foundation for massive pseudotachylitic melt generation as typified by the breccias of the Sudbury and Vredefort structures has so far remained entirely speculative. The available petrographic and chemical evidence has, thus, been interpreted to favor either decompression melting (i.e., in situ generation of melt) upon central uplift collapse, or the impact melt infiltration hypothesis. Importantly, all the past clast population and chemical analyses have invariably supported an origin of these breccias from local lithologies only."],["dc.identifier.doi","10.1016/j.gca.2017.07.040"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/61831"],["dc.language.iso","en"],["dc.relation.issn","0016-7037"],["dc.title","The impact pseudotachylitic breccia controversy: Insights from first isotope analysis of Vredefort impact-generated melt rocks"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]
    Details DOI
  • 2018Journal Article
    [["dc.bibliographiccitation.firstpage","331"],["dc.bibliographiccitation.journal","Geochimica et Cosmochimica Acta"],["dc.bibliographiccitation.lastpage","332"],["dc.bibliographiccitation.volume","240"],["dc.contributor.author","Reimold, Wolf Uwe"],["dc.contributor.author","Hauser, Natalia"],["dc.contributor.author","Hansen, Bent T."],["dc.contributor.author","Thirlwall, Matthew"],["dc.contributor.author","Hoffmann, Marie"],["dc.date.accessioned","2019-07-22T14:31:55Z"],["dc.date.available","2019-07-22T14:31:55Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1016/j.gca.2018.08.016"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/61830"],["dc.language.iso","en"],["dc.relation.issn","0016-7037"],["dc.title","Reply to “Comments on “The impact pseudotachylitic breccia controversy: Insights from first isotope analysis of Vredefort impact-generated melt rocks” by Reimold et al. 2017 (GCA 214, 266–282)” by A.A. Garde and M.B. Klausen (GCA 233, 187–190)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]
    Details DOI
  • 2016Journal Article
    [["dc.bibliographiccitation.firstpage","875"],["dc.bibliographiccitation.issue","08"],["dc.bibliographiccitation.journal","Open Journal of Geology"],["dc.bibliographiccitation.lastpage","894"],["dc.bibliographiccitation.volume","06"],["dc.contributor.author","Hansen, Bent T."],["dc.contributor.author","Wemmer, Klaus"],["dc.contributor.author","Eckhardt, Monique"],["dc.contributor.author","Putthapiban, Prinya"],["dc.contributor.author","Assavapatchara, San"],["dc.date.accessioned","2019-07-09T11:43:02Z"],["dc.date.available","2019-07-09T11:43:02Z"],["dc.date.issued","2016"],["dc.description.abstract","Bamnet Narong is located in northeastern Thailand (Chaiyaphum Province). It is the largest salt mine in the country and has been mined for decades. The landscape in this part of Thailand is characterised by a low plateau, which is called the Khorat Plateau. The plateau is divided into two basins by the Phu Phan Range, the Sakhon Nakhon Basin in the north and the Khorat Basin in the south. The analysed potashes and rock salts are deposited in the Maha Sarakham Formation, which represents the salt-bearing strata of the Khorat Basin. The stratigraphic age of this deposit has been debated since the late 1960’s. The assigned ages range from Mid-Cretaceous to Late Cretaceous and up to the Eocene. In this study different isotopic dating systems (Rb-Sr, Sr-Sr, K-Ar and K-Ca) were applied. The stratigraphic age for the time of deposition was confirmed to be Mid Cretaceous (Cenomanian). Furthermore, the homogeneity of the carnallites was investigated in order to trace a possible redistribution of rubidium."],["dc.identifier.doi","10.4236/ojg.2016.68067"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14086"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/58808"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","2161-7589"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.title","Isotope Dating of the Potash and Rock Salt Deposit at Bamnet Narong, NE-Thailand"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]
    Details DOI
  • 2007Conference Abstract
    [["dc.bibliographiccitation.issue","15"],["dc.bibliographiccitation.journal","Geochimica et Cosmochimica Acta"],["dc.bibliographiccitation.volume","71"],["dc.contributor.author","Klaus, J. S."],["dc.contributor.author","Hansen, Bent T."],["dc.contributor.author","Beer, W. W."],["dc.date.accessioned","2018-11-07T11:00:00Z"],["dc.date.available","2018-11-07T11:00:00Z"],["dc.date.issued","2007"],["dc.identifier.isi","000248789901192"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/50827"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.publisher.place","Oxford"],["dc.relation.conference","17th Annual V M Goldschmidt Conference"],["dc.relation.eventlocation","Cologne, GERMANY"],["dc.title","Detecting the origin of saline solutions in salt deposits of the German Zechstein basin"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]
    Details WOS
  • 2011Journal Article
    [["dc.bibliographiccitation.firstpage","132"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Ore Geology Reviews"],["dc.bibliographiccitation.lastpage","148"],["dc.bibliographiccitation.volume","40"],["dc.contributor.author","Dill, Harald G."],["dc.contributor.author","Hansen, Bent T."],["dc.contributor.author","Weber, B."],["dc.date.accessioned","2018-11-07T08:52:10Z"],["dc.date.available","2018-11-07T08:52:10Z"],["dc.date.issued","2011"],["dc.description.abstract","Fluorite vein-type deposits occur along the western edge of the Bohemian Massif in SE Germany, from Bayerischer Wald to Frankenwald. They are emplaced in various host rock lithologies, as old as Late Variscan granites and low-grade metasediments of late Paleozoic age. The Nabburg-Wolsendorf mining district in NE Bavaria, Germany, used to be the largest in Germany and one of the most important in the world. A minor proportion of fluorite is also concentrated in the Permo-Mesozoic siliciclastic sediments resting unconformably upon the basement rocks near Pingarten. Fluorite is investigated in the present study for its REE variation, the REE minerals associated with it and its Sm/Nd isotope ratios. The primary blue-black fluorites precipitated from aqueous hydrothermal solutions during early stages without noticeable interaction with wall rocks and were poor in REE and Y. The secondary green, white and yellow fluorites formed from remobilization of older fluorite and through the interaction of more viscous fluids with the wall rocks and they are abundant in REE plus Y. Monazite-(Ce) is the major source for the REE re-deposited into fluorite. In a double cross plot, designed during this study and using the Ce-, Eu anomalies and the skewness (fractionation) of the REE pattern, the geological and hydrological evolution of fluorite vein mineralizations are related to the granite and the unconformity, which is the hydraulic reference plane for the fluorite mineralization. First, blue fluorite formed at considerable depth below the unconformity. Fetid fluorite is exclusive to the deep-seated vein mineralization with abundant uranium minerals. These uranium minerals caused some radiation damage to the lattice of the blue fluorite and turned into black Based upon the variation of REE in fluorite and the Sm/Nd dating (fluorite age: ca. 270 Ma) the Permian paleogeography can be reconstructed. It is suggested that in the Nabburg-Wolsendorf District a NW-SE oriented swell stood out from a vast peneplain. Second, fluorite vein mineralization composed of green, white and yellow fluorite along the western edge of the Bohemian Massif resulted from remobilization associated with an increase in REE and NI relative to the blue and black fluorites and a strong fractionation of LREE vs. HREE. The REE signature of the latter fluorites got increasingly more \"unconformity-related\" (Eh>0), notwithstanding the fluid source which the mineralizing fluids originated from. The REE patterns, Sr- and Sm/Nd isotopes suggest that mineralizing fluids mainly derived from a granitic source rock with little impact from metasedimentary rocks. Cerite-(Ce) formed during the initial stages of fluorite mineralization when little REE were accommodated in the lattice of blue fluorite. During precipitation of green, white and yellow fluorite, REE minerals failed to continue developing on their own, because REE were increasingly accommodated in the structure of fluorite changing its color from blue via green into white. REE minerals were again formed during supergene alteration of fluorite mineral assemblages, terminating the entire F-REE cycle. Rhabdophane is of supergene origin and indicative of meteoric conditions that are neutral to slightly alkaline. Subsequently, florencite evolved under a more acidic regime of chemical weathering. The distinct data arrays in the cross plots of the Sm-, Nd- and Sr isotopes, likewise, indicate this subdivision into fluorite originating from fluids that interacted with granitic and gneissic rocks at depth and those being formed proximal and distal to the unconformity. (C) 2011 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.oregeorev.2011.06.003"],["dc.identifier.isi","000295497300010"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/22106"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1872-7360"],["dc.relation.issn","0169-1368"],["dc.title","REE contents, REE minerals and Sm/Nd isotopes of granite- and unconformity-related fluorite mineralization at the western edge of the Bohemian Massif: With special reference to the Nabburg-Wolsendorf District, SE Germany"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]
    Details DOI WOS
  • 2013Journal Article
    [["dc.bibliographiccitation.firstpage","140"],["dc.bibliographiccitation.journal","Journal of Geodynamics"],["dc.bibliographiccitation.lastpage","147"],["dc.bibliographiccitation.volume","69"],["dc.contributor.author","Vuong, Nguyen V."],["dc.contributor.author","Hansen, Bent T."],["dc.contributor.author","Wemmer, Klaus"],["dc.contributor.author","Lepvrier, Claude"],["dc.contributor.author","Tich, Vu V."],["dc.contributor.author","Ta Trong Thang, Ta Trong Thang"],["dc.date.accessioned","2018-11-07T09:20:32Z"],["dc.date.available","2018-11-07T09:20:32Z"],["dc.date.issued","2013"],["dc.description.abstract","The Sm/Nd isochron mineral dating technique, applied on lenses of ophiolitic rocks of the Song Ma suture zone, reveals crystallization ages of 387-313 Ma for titanites extracted from the mafic components (metagabbros, metabasalts) of the ophiolite suite. These ages correspond to a large time interval within the Carboniferous period. Such results mean that these blocks are lithospheric relics of an eastern branch of the Paleotethys. They however do not exclude that an older early Paleozoic ocean has previously existed in the area. The overprinted metamorphism that affect these rocks and the metasedimentary host rocks, including locally HP granulite and eclogite facies conditions (Nakano et al., 2006, 2008, 2010), took place during the Triassic Indosinian orogeny after closure of the ocean, continental subduction and collision, leading to the suturing of the Indochina and South China blocks. U/Pb and Ar/Ar data reveal that peak metamorphic conditions were attained 266-265 Ma ago, being then followed by cooling at 250-245 Ma. (C)2012 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.jog.2012.04.003"],["dc.identifier.isi","000324356300010"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/28903"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0264-3707"],["dc.title","U/Pb and Sm/Nd dating on ophiolitic rocks of the Song Ma suture zone (northern Vietnam): Evidence for upper paleozoic paleotethyan lithospheric remnants"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]
    Details DOI WOS