Pack, Andreas

[["dc.bibliographiccitation.firstpage","5337"],["dc.bibliographiccitation.issue","17"],["dc.bibliographiccitation.journal","PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA"],["dc.bibliographiccitation.lastpage","5341"],["dc.bibliographiccitation.volume","112"],["dc.contributor.author","Herwartz, Daniel"],["dc.contributor.author","Pack, Andreas"],["dc.contributor.author","Krylov, Dmitri"],["dc.contributor.author","Xiao, Yilin"],["dc.contributor.author","Muehlenbachs, Karlis"],["dc.contributor.author","Sengupta, Sukanya"],["dc.contributor.author","Di Rocco, Tommaso"],["dc.date.accessioned","2018-11-07T09:58:18Z"],["dc.date.available","2018-11-07T09:58:18Z"],["dc.date.issued","2015"],["dc.description.abstract","The oxygen isotopic composition of hydrothermally altered rocks partly originates from the interacting fluid. We use the triple oxygen isotope composition (O-17/O-16, O-18/O-16) of Proterozoic rocks to reconstruct the O-18/O-16 ratio of ancient meteoric waters. Some of these waters have originated from snowball Earth glaciers and thus give insight into the climate and hydrology of these critical intervals in Earth history. For a Paleoproterozoic [similar to 2.3-2.4 gigayears ago (Ga)] snowball Earth, delta O-18 = -43 +/- 3 parts per thousand is estimated for pristine meteoric waters that precipitated at low paleo-latitudes (<= 35 degrees N). Today, such low O-18/O-16 values are only observed in central Antarctica, where long distillation trajectories in combination with low condensation temperatures promote extreme O-18 depletion. For a Neoproterozoic (similar to 0.6-0.7 Ga) snowball Earth, higher meltwater delta O-18 estimates of -21 +/- 3% imply less extreme climate conditions at similar paleolatitudes (<= 35 degrees N). Both estimates are single snapshots of ancient water samples and may not represent peak snowball Earth conditions. We demonstrate how O-17/O-16 measurements provide information beyond traditional O-18/O-16 measurements, even though all fractionation processes are purely mass dependent."],["dc.identifier.doi","10.1073/pnas.1422887112"],["dc.identifier.isi","000353554000040"],["dc.identifier.pmid","25870269"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/37341"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0027-8424"],["dc.title","Revealing the climate of snowball Earth from Delta O-17 systematics of hydrothermal rocks"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","199"],["dc.bibliographiccitation.journal","Lithos"],["dc.bibliographiccitation.lastpage","211"],["dc.bibliographiccitation.volume","316-317"],["dc.contributor.author","Iovine, Raffaella Silvia"],["dc.contributor.author","Mazzeo, Fabio Carmine"],["dc.contributor.author","Wörner, Gerhard"],["dc.contributor.author","Pelullo, Carlo"],["dc.contributor.author","Cirillo, Gianluca"],["dc.contributor.author","Arienzo, Ilenia"],["dc.contributor.author","Pack, Andreas"],["dc.contributor.author","D'Antonio, Massimo"],["dc.date.accessioned","2020-11-05T15:10:55Z"],["dc.date.available","2020-11-05T15:10:55Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1016/j.lithos.2018.07.009"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/68490"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-352.8"],["dc.relation.issn","0024-4937"],["dc.title","Coupled δ18O-δ17O and 87Sr/86Sr isotope compositions suggest a radiogenic and 18O-enriched magma source for Neapolitan volcanoes (Southern Italy)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Paleoceanography and Paleoclimatology"],["dc.bibliographiccitation.volume","36"],["dc.contributor.author","Fischer, Meike B."],["dc.contributor.author","Oeser, Martin"],["dc.contributor.author","Weyer, Stefan"],["dc.contributor.author","Folco, Luigi"],["dc.contributor.author","Peters, Stefan T. M."],["dc.contributor.author","Zahnow, Fabian"],["dc.contributor.author","Pack, Andreas"],["dc.date.accessioned","2021-06-01T09:41:37Z"],["dc.date.available","2021-06-01T09:41:37Z"],["dc.date.issued","2021"],["dc.identifier.doi","10.1029/2020PA004159"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/84980"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-425"],["dc.relation.eissn","2572-4525"],["dc.relation.issn","2572-4517"],["dc.title","I‐Type Cosmic Spherules as Proxy for the Δ′ 17 O of the Atmosphere—A Calibration With Quaternary Air"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","282"],["dc.bibliographiccitation.journal","Geochimica et Cosmochimica Acta"],["dc.bibliographiccitation.lastpage","298"],["dc.bibliographiccitation.volume","175"],["dc.contributor.author","Bermingham, K. R."],["dc.contributor.author","Mezger, Klaus"],["dc.contributor.author","Scherer, Erik E."],["dc.contributor.author","Horan, M. F."],["dc.contributor.author","Carlson, R. W."],["dc.contributor.author","Upadhyay, D."],["dc.contributor.author","Magna, T."],["dc.contributor.author","Pack, Andreas"],["dc.date.accessioned","2018-11-07T10:18:13Z"],["dc.date.available","2018-11-07T10:18:13Z"],["dc.date.issued","2016"],["dc.description.abstract","Several nucleosynthetic processes contributed material to the Solar System, but the relative contributions of each process, the timing of their input into the solar nebula, and how well these components were homogenized in the solar nebula remain only partially constrained. The Ba isotope system is particularly useful in addressing these issues because Ba isotopes are synthesized via three nucleosynthetic processes (s-, r-, p-process). In this study, high precision Ba isotope analyses of 22 different whole rock chondrites and achondrites (carbonaceous chondrites, ordinary chondrites, enstatite chondrites, Martian meteorites, and eucrites) were performed to constrain the distribution of Ba isotopes on the regional scale in the Solar System. A melting method using aerodynamic levitation and CO2-laser heating was used to oxidize SiC, a primary carrier of Ba among presolar grains in carbonaceous chondrites. Destruction of these grains during the fusion process enabled the complete digestion of these samples. The Ba isotope data presented here are thus the first for which complete dissolution of the bulk meteorite samples was certain. Enstatite chondrites, ordinary chondrites, and all achondrites measured here possess Ba isotope compositions that are not resolved from the terrestrial composition. Barium isotope anomalies are evident in most of the carbonaceous chondrites analyzed, but the Ba-135 anomalies are generally smaller than previously reported for similarly sized splits of CM2 meteorites. Variation in the size of the Ba-135 anomaly is also apparent in fused samples from the same parent body (e.g., CM2 meteorites) and in different pieces from the same meteorite (e.g., Orgueil, CI). Here, we investigate the potential causes of variability in Ba-135, including the contribution of radiogenic Ba-135 from the decay of Cs-135 and incomplete homogenization of the presolar components on the <0.8 g sample scale. (C) 2015 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.gca.2015.11.006"],["dc.identifier.isi","000369070000019"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/41393"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","1872-9533"],["dc.relation.issn","0016-7037"],["dc.title","Barium isotope abundances in meteorites and their implications for early Solar System evolution"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1649"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Geochimica et Cosmochimica Acta"],["dc.bibliographiccitation.lastpage","1650"],["dc.bibliographiccitation.volume","69"],["dc.contributor.author","Pack, A."],["dc.date.accessioned","2020-11-05T15:10:55Z"],["dc.date.available","2020-11-05T15:10:55Z"],["dc.date.issued","2005"],["dc.identifier.doi","10.1016/j.gca.2004.06.003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/68487"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-352.8"],["dc.relation.iserratumof","/handle/2/68486"],["dc.relation.issn","0016-7037"],["dc.title","Erratum to A. Pack, H. Yurimoto and H. Palme (2004) “Petrographic and oxygen-isotopic study of refractory forsterites from R-chondrite Dar al Gani 013 (R3.5–6), unequilibrated ordinary and carbonaceous chondrites”"],["dc.type","journal_article"],["dc.type.internalPublication","no"],["dc.type.subtype","erratum_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","184"],["dc.bibliographiccitation.journal","Earth and Planetary Science Letters"],["dc.bibliographiccitation.lastpage","186"],["dc.bibliographiccitation.volume","418"],["dc.contributor.author","Pack, Andreas"],["dc.contributor.author","Herwartz, Daniel"],["dc.date.accessioned","2018-11-07T09:57:13Z"],["dc.date.available","2018-11-07T09:57:13Z"],["dc.date.issued","2015"],["dc.identifier.doi","10.1016/j.epsl.2015.02.044"],["dc.identifier.isi","000352665200017"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/37115"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1385-013X"],["dc.relation.issn","0012-821X"],["dc.title","Observation and interpretation of Delta O-17 variations in terrestrial rocks - Response to the comment by Miller et al. on the paper by Pack & Herwartz (2014)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","138"],["dc.bibliographiccitation.journal","Earth and Planetary Science Letters"],["dc.bibliographiccitation.lastpage","145"],["dc.bibliographiccitation.volume","390"],["dc.contributor.author","Pack, Andreas"],["dc.contributor.author","Herwartz, Daniel"],["dc.date.accessioned","2018-11-07T09:42:32Z"],["dc.date.available","2018-11-07T09:42:32Z"],["dc.date.issued","2014"],["dc.description.abstract","It has been shown in numerous studies that terrestrial rocks and minerals fall on a line with slope similar to 0.52 in a delta O-17 vs. delta O-18 diagram. In this study, we present new data on the triple isotope composition of the Earth mantle, crustal materials and low-T aqueous precipitates. Crustal materials show distinct variations in Delta O-17 suggesting that the concept of a single terrestrial mass fractionation is invalid on small-scale. Observable variations in individual fractionation slopes theta are interpreted as temperature effects. We show that the Earth mantle is isotopically homogeneous and confirm the recent finding that the Earth mantle has a negative Delta O-17. The difference in delta O-18 and Delta O-17 between seawater and oceanic crust is discussed with respect to the effects of low- and high-temperature water-rock interaction. (C) 2014 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.epsl.2014.01.017"],["dc.identifier.isi","000333998400014"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33974"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1385-013X"],["dc.relation.issn","0012-821X"],["dc.title","The triple oxygen isotope composition of the Earth mantle and understanding Delta O-17 variations in terrestrial rocks and minerals"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","142"],["dc.bibliographiccitation.journal","Applied Geochemistry"],["dc.bibliographiccitation.lastpage","149"],["dc.bibliographiccitation.volume","90"],["dc.contributor.author","Bau, Michael"],["dc.contributor.author","Schmidt, Katja"],["dc.contributor.author","Pack, Andreas"],["dc.contributor.author","Bendel, Verena"],["dc.contributor.author","Kraemer, Dennis"],["dc.date.accessioned","2020-11-05T15:10:58Z"],["dc.date.available","2020-11-05T15:10:58Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1016/j.apgeochem.2018.01.008"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/68506"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-352.8"],["dc.relation.issn","0883-2927"],["dc.title","The European Shale: An improved data set for normalisation of rare earth element and yttrium concentrations in environmental and biological samples from Europe"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","306"],["dc.bibliographiccitation.journal","Geochimica et Cosmochimica Acta"],["dc.bibliographiccitation.lastpage","317"],["dc.bibliographiccitation.volume","102"],["dc.contributor.author","Pack, Andreas"],["dc.contributor.author","Gehler, Alexander"],["dc.contributor.author","Suessenberger, Annette"],["dc.date.accessioned","2018-11-07T09:28:51Z"],["dc.date.available","2018-11-07T09:28:51Z"],["dc.date.issued","2013"],["dc.description.abstract","Fluctuations in atmospheric p(CO2) may have played the key role in global climate throughout Earth's history. For the quantification of past variations in atmospheric p(CO2), several geological proxy approaches and geochemical models have been developed. Here, we evaluate a new CO2 proxy approach that is based on the triple oxygen isotope composition (O-16, O-17, O-18) of skeletal apatite of terrestrial mammals. Our approach utilizes the relation between an anomaly in O-17 of tropospheric air O-2 and atmospheric p(CO2). The anomaly is transferred from inhaled air O-2 to skeletal apatite of mammals. Hence, triple oxygen isotope data of mammalian bioapatite provide information regarding p(CO2) during the animal's lifetime. The approach was calibrated with a detailed mass balance model that was verified by analyses on a set of recent mammals. We evaluate the potential of this new independent terrestrial paleo-CO2 proxy in a case study including Eocene to Miocene samples. The present investigation provides promising results that are in good agreement with existing proxy- and model data. The uncertainty intrinsic to the proxy is mainly due to uncertainties in physiological parameters. (C) 2012 Elsevier Ltd. All rights reserved."],["dc.description.sponsorship","German National Science Foundation DFG [PA909/5-1]"],["dc.identifier.doi","10.1016/j.gca.2012.10.017"],["dc.identifier.isi","000313202300018"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/30881"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0016-7037"],["dc.title","Exploring the usability of isotopically anomalous oxygen in bones and teeth as paleo-CO2-barometer"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","Meteoritics and Planetary Science"],["dc.bibliographiccitation.volume","51"],["dc.contributor.author","Metzler, Knut"],["dc.contributor.author","Pack, Andreas"],["dc.contributor.author","Hezel, Dominik C."],["dc.date.accessioned","2018-11-07T10:10:35Z"],["dc.date.available","2018-11-07T10:10:35Z"],["dc.date.issued","2016"],["dc.format.extent","A459"],["dc.identifier.isi","000388662400317"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/39885"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell"],["dc.publisher.place","Hoboken"],["dc.relation.conference","79th Annual Meeting of the Meteoritical-Society"],["dc.relation.eventlocation","Berlin, GERMANY"],["dc.relation.issn","1945-5100"],["dc.relation.issn","1086-9379"],["dc.title","SEARCH FOR CORRELATIONS BETWEEN SIZE AND OXGEN ISOTOPY OF OC CHONDRULES"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]