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First steps in reconstructing Early Jurassic sea water temperatures in the Andean Basin of northern Chile based on stable isotope analyses of oyster and brachiopod shells

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Journal of Palaeogeography 2020年第1期9卷 71-87页

作者： matthias alberti Franz T.Fürsich Nils Andersen Institut für Geowissenschaften Christian-Albrechts-Universitat zu KielLudewig-Meyn-Straβe 1024118 KielGermany GeoZentrum Nordbayern Fachgruppe PalaoUmweltFriedrich-Alexander-Universitat Erlangen-NürnbergLoewenichstraβe 2891054 ErlangenGermany Leibniz Laboratory for Radiometric Dating and Stable Isotope Research Christian-Albrechts-Universitat zu KielMax-Eyth-Straβe 1124118 KielGermany

The stable isotope(δ13 C,δ18 O)composition of a collection of Lower Jurassic brachiopods and oysters from the Andean Basin of northern Chile was *** results allow the first reconstruction of absolute water temperatures for several ammonite zones in the Lower Jurassic of South *** temperature record starts with comparatively high values in the Late Sinemurian(average:27.0℃;Raricostatum Zone).Just before the Sinemurian–Pliensbachian transition,temperatures dropped to an average of 24.3℃.The lowest temperature value in the dataset was recorded for a brachiopod shell of the latest Pliensbachian Spinatum Zone(19.6℃).No data are available for the Early Toarcian,but results for the late Toarcian show again comparatively warm conditions(average:24.4℃;Thouarsense–Levesquei zones).Even though more material and analyses are necessary to corroborate the recorded temperatures,the present dataset seems to indicate the global nature of the Late Pliensbachian Cooling *** contrast,the global warming during the Toarcian Oceanic Anoxic Event has not been recorded due to a lack of Early Toarcian ***δ13 C record of brachiopods and oysters documents a gradual increase in values representing background *** shells were used for high-resolution stable isotope analyses and show seasonal temperature fluctuations over a period of around 3 years in the life time of the *** explained only by temperatures,theδ18 O values point to a minimum estimate for the seasonality in the late Toarcian of slightly more than 3℃.

关键词： Early Jurassic Chile Stable isotopes Palaeoclimate Water temperatures Seasonality

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Trace fossils of an amalgamated storm-bed succession from the Jurassic of the Kachchh Basin,India:The significance of time-averaging in ichnology

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Journal of Palaeogeography 2018年第1期7卷 14-31页

作者： Franz To Fürsich Alfred Uchman matthias alberti Dhirendra K.Pandey GeoZentrum Nordbayern Fachgruppe PalaoUmweltFriedrich-Alexander-Universitat Erlangen-Numberg Loewenichstra■e 2891054 ErlangenGermany Institute of Geological Sciences Jagiellonian UniversityGronostajowa 3a30-387KrakowPoland Institut fur Geowissenschaften Christian-Albrechts-Universitat zu KielLudewig-Meyn-Stral3e 1024118Kiel Germany Earth and Planetary Sciences GrouplPalaeontology Manipal Center for Natural SciencesManipal University Manipal 576104KarnatakaIndia

The uppermost part of the Upper Bathonian Sponge Limestone member, Patcham Formation, of the Jhura Dome of Kachchh Mainland is a thickening-and shallowing-upward succession topped by medium-to thick-bedded hummocky cross-stratified grainstones deposited by storm waves. Occasionally, thin, commonly lenticular, intraclastic-bioclastic silty marl intercalations between the grainstones are highly bioturbated, in contrast to the grainstones, in which, for the most part, trace fossils occur scattered. Large exposures of bedding planes of the grainstones allow the detailed investigation of ichnological features, whereas the high density of traces in the soft marls precludes the identification of any ichnotaxa. Eighteen ichnotaxa have been recorded including Ophiomorpha, Thalassinoides, Taenidium, Gyrophyllites, Chondrites, Dactyloidites, Teichichnus, Bolonia, and Ancorichnus. Except for Ophiomorpha nodosa and Thalassinoides, which generally indicate moderate to high energy conditions and are the dwelling burrows of suspension-feeding to omnivorous crustaceans, the ichnotaxa represent a deposit-feeding behaviour of their producers and thus are characteristic of low-energy environments. The trace fossils form three ichnoassemblages characterized by(1) Ophiomorpha nodosa and Thalassinoides suevicus,(2)?Thalassinoides isp. A, Taenidium, and Bolonia lata,and(3) Ancorichnus. The dominance of traces of deposit-feeders in rocks indicative of high-energy events is counterintuitive and points to their non-contemporaneity. The sediments were deposited during brief highenergy events, whereas the trace fossils were produced when, after waning of storms low-energy conditions prevailed. This time-averaging is particularly pronounced in trace fossils that extend vertically downwards and may reach strata deposited under distinctly different conditions. Thus, environmental interpretations based on trace fossils should refer to colonisation surfaces rather than to the sediment surrounding th

关键词： Trace fossils Middle Jurassic Kachchh Basin Taxonomy Time averaging Ichnology

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Facies analysis and palaeoecology of the Jurassic Spiti Shale Formation in the Spiti area,Northern India

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Journal of Palaeogeography 2021年第4期10卷 438-462页

作者： Franz T.Fürsich matthias alberti Dhirendra K.Pandey Ketan Chaskar Suraj Bhosale FG Palaoumwelt GeoZentrum Nordbayern der Friedrich-Alexander-Universitat Erlangen-NürnbergLoewenichstrasse 2891054ErlangenGermany State Key Laboratory for Mineral Deposits Research School of Earth Sciences and EngineeringCentre for Research and Education on Biological Evolution and Environment and Frontiers Science Center for Critical Earth Material CyclingNanjing210023China Department of Geology Under the School of EarthBiological and Environmental ScienceCentral University of South BiharSH 7Gaya-Panchanpur RoadVillage KarharaPost FatehpurGaya824236BiharIndia Department of Earth and Environmental Science K.S.K.V.Kachchh UniversityBhuj370001India

The Spiti Shale Formation is a widely distributed stratigraphic unit of the passive northern margin of the Indian craton,deposited between the Callovian and earliest *** siliciclastic strata are dominated by dark-grey to black argillaceous *** the formation has undergone intense tectonic stress involving folding and faulting,it is very difficult to document a complete *** the type area,the Spiti Valley,six sections have been measured that document parts of the three informal members of the formation,the Lower,Middle,and Upper *** its uniform appearance,eight facies/biofacies types could be distinguished,ranging from the anoxic shale facies,with ammonites and belemnites as the only faunal elements,to the dysoxic Malayomaorica and Bositra biofacies,and the oxic to anoxic offshore shelf facies,which are characterized by low-diversity macrobenthos *** facies are the condensed glauconiticphosphoritic mudrock facies and the Fe-oolitic siltstone facies(both characterized by sediment starvation),the aerated argillaceous silt-sandstone facies,and the tide-influenced nearshore shelf *** benthic macrofauna represents four bivalve-dominated associations all characterized by a very low to low species *** are the Bositra buchii,the Australobuchia spitiensis,the Palaeonucula cuneiformis-Pruvostiella hermanni-Indogrammatodon egertonianus,and the Malayomaorica sp.-Australobuchia spitiensis-Retroceramus haasti *** and macrobenthic associations indicate that the Spiti Shale Formation represents outer to inner shelf environments,which for much of the time were subjected to upwelling and anoxic to dysoxic *** shallowing at the top characterizes the transition to the overlying Lower Cretaceous Giumal Formation.

关键词： Jurassic palaeoenvironments Biofacies Macrobenthic communities Black shales Deoxygenation Upwelling Himalayan mountains

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Slumping in the Upper Jurassic Baisakhi Formation of the Jaisalmer Basin, western India: Sign of synsedimentary tectonics?

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Journal of Palaeogeography 2017年第4期6卷 321-332页

作者： matthias alberti Dhirendra K.Pandey Jitendra K.Sharma Narendra K.Swami Alfred Uchman Institut für Geowissenschaften Christian-Albrechts-Universitt zu Kiel Department of Geology University of Rajasthan Earth & Planetary Sciences Group/Palaeontology Manipal Center for Natural Sciences Manipal University Institute of Geological Sciences Jagiellonian University

A spectacularly exposed slump is described from a 120-m-long road cut between the villages of Kanod and Deva in the northeastern Jaisalmer Basin of Rajasthan,*** Upper Jurassic part of the sediments at the outcrop was formed in a near-shore setting and belongs to the Ludharwa Member of the Baisakhi *** 3-m-thick unit shows a number of asymmetric folds and thrust faults leading to an imbrication of partly lithified sandstone *** deformation structures allow the reconstruction of a movement towards the *** agrees well with the basin configuration that shows a deepening into this *** the determination of a specific trigger mechanism is difficult for soft-sediment deformation structures,an earthquake caused by synsedimentary tectonics in the basin seems to be the most likely explanation.

关键词： Sedimentology Mass movements Slumping Soft-sediment deformation structures Jaisalmer Basin Jurassic

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Recurrent hardgrounds and their significance for intra-basinal correlations:a case study of upper Bathonian rocks from the western margin of the Indian craton

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Journal of Palaeogeography 2019年第1期8卷 19-30页

作者： Dhirendra K.Pandey Franz T.Fürsich matthias alberti Jitendra K.Sharma Narendra Swami Earth and Planetary Sciences Group Manipal Center for Natural SciencesCentre of Excellence Dr. TMA Pai Planetarium Building Manipal Academy of Higher Education FG Pal?oumwelt GeoZentrum Nordbayern Friedrich-Alexander Universit?t Erlangen-Nürnberg Institut für Geowissenschaften Christian-Albrechts-Universit?t zu Kiel Department of Geology University of Rajasthan Himalayan Geology Division Geological Survey of India Northern Region

A set of two to three prominent hardgrounds can be traced for more than 40 km from east to west within the Jurassic succession of the Jaisalmer Basin at the western margin of the Indian Craton. The hardgrounds started to form under subtidal conditions in a mixed carbonate–siliciclastic setting during the last phase of a transgressive systems tract, i.e. the maximum flooding zone. The age difference between the hardgrounds is very small, but they differ lithologically. Typically, the stratigraphically oldest hardground occurs at the top of a 1-m-thick calcareous sandstone. It is characterized by a spectacular megaripple surface encrusted with oysters and subsequently occasionally bored by bivalves. The hardground is overlain by 10–25 cm of biowackestone to biopackstone, at the top of which another hardground is developed. This second hardground is characterized by abundant bivalve(Gastrochaenolites isp.) and "worm" borings(Trypanites and Meandropolydora isp.) and occasional oyster encrustations. The third hardground can be found within the overlying 60-cm-thick, bioturbated, fossiliferous silty marly packstone. It shows common to abundant oyster encrustations and occasional borings together with reworked concretions. The individual hardground can be well recognized throughout the basin based on lithology and biotic components. The second hardground(biowackestone to biopackstone) with abundant bivalve and worm borings is most prominent and widespread. Lithostratigraphically, these three hardground surfaces belong to the uppermost part of the Bada Bag Member of the Jaisalmer Formation. Based on ammonites, such as Perisphinctes congener(Waagen), brachiopods, and corals, this interval of the Bada Bag Member has been assigned a late Bathonian age. The entire succession above the first hardground is bioturbated up to the overlying marly silt of the Kuldhar Member of the Jaisalmer Formation, which is already Callovian in age. The characteristic hardground lithologies, toget

关键词： Hardgrounds Stratigraphy Palaeoenvironment Jurassic Jaisalmer Basin

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First record of stable isotopes(δ^(13)C, δ^(18)O) and element ratios(Mg/Ca, Sr/Ca) of Middle to Late Jurassic belemnites from the Indian Himalayas and their potential for palaeoenvironmental reconstructions

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Journal of Palaeogeography 2021年第3期10卷 416-437页

作者： matthias alberti Franz T.Fursich Dhirendra K.Pandey Nils Andersen Dieter Garbe-Schonberg Suraj Bhosale Ketan Chaskar Jorg M.Habermann State Key Laboratory for Mineral Deposits Research School of Earth Sciences and EngineeringCenter for Research and Education on Biological Evolution and Environment and Frontiers Science Center for Critical Earth Material CyclingNanjing UniversityNanjing 210023Jiangsu ProvinceChina GeoZentrum Nordbayern Friedrich-Alexander-Universität Erlangen-NürnbergLoewenichstraße 2891054 ErlangenGermany Department of Geology School of EarthBiological and Environmental ScienceCentral University of South Bihar SH 7Gaya-Panchanpur RoadVillage KarharaPost FatehpurGaya 824236(Bihar)India Department of Earth and Environmental Science KSKV Kachchh UniversityBhujIndia Leibniz Laboratory for Radiometric Dating and Stable Isotope Research Christian-Albrechts-Universität zu KielMax-Eyth-Straße 1124118 KielGermany Institut für Geowissenschaften Christian-Albrechts-Universität zu KielLudewig-Meyn-Straße 1024118 KielGermany

Middle to Late Jurassic belemnites from the Spiti and Zanskar valleys in the Indian Himalayas were used for stable isotope(δ^(13)C, δ^(18)O) and element(Mg/Ca, Sr/Ca) analyses. Although the Himalayan orogeny deformed and altered a large portion of the collected fossils, cathodoluminescence and scanning electron microscopy in combination with analyses of iron and manganese contents allowed the identification of belemnites believed to still retain their original chemical composition. Results indicate a long-term temperature decrease from the Middle Callovian–Oxfordian to the Tithonian, which is proposed to have been caused by a concomitant drift of eastern Gondwana into higher palaeolatitudes. Reconstructed absolute temperatures depend on the used equation and assumed δ^(18)O value of seawater, but most likely varied between 17.6 ℃ to 27.6℃ in the Kimmeridgian and Tithonian with average values between 22 ℃ to 24 ℃. This way, temperatures were similar to slightly warmer than today at comparable latitudes. The reconstruction of absolute temperatures for the Middle Callovian–Oxfordian was hindered by a larger number of poorly preserved belemnites representing this time interval.

关键词： Jurassic Palaeoclimate Water temperature Spiti Zanskar India Tethyan Himalaya Eastern Gondwana

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Small extrachromosomal circular DNA in amyotrophic lateral sclerosis matter

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Neural Regeneration Research 2025年第5期20卷 1411-1413页

作者： Marcos J.Arauzo-Bravo Daniela Gerovska matthias Schwab Alexandra Kretz Computational Biology and Systems Biomedicine Biodonostia Health Research InstituteSan SebastianSpain Basque Foundation for Science IKERBASQUEBilbaoSpainMax Planck Institute for Molecular BiomedicineComputational Biology and Bioinformatics GroupMünsterNorth Rhine-WestphaliaGermany Department of Cell Biology and Histology Faculty of Medicine and NursingUniversity of Basque Country(UPV/EHU)LeioaSpain Department of Neurology Jena University HospitalJenaThuringiaGermany

Comprehensive studies identify motor neuron spectrum disorders including amyotrophic lateral sclerosis(ALS)as globally rising fatal disorders with the highest prevalence in aging populations,influenced by ethnicity and ancestry(GBD 2016 Motor Neuron Disease Colla borators,2018).While~10% of diagnoses involve a family history(fALS),most cases are considered sporadic(sALS).However,population-based studies suggest that even cases without a common index mutation impart heritability(Ryan et al.,2019),indicating a crucial role of rare and as yet unknown genetic denominators.

关键词： amyotrophic sclerosis

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Search for 2D Ferromagnets:Molecular Beam Epitaxy is a Critical Tool

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Chinese Physics Letters 2020年第8期37卷 1-2页

作者： matthias Batzill Affiliations Department of Physics University of South FloridaTampaFL 33620USA

Van der Waals materials with ferromagnetic properties have attracted recent interest because of their promise to enable combination of materials with atomically sharp interfaces,facilitating spin transport and spin in... 详细信息

关键词： Epitaxy enable Tool

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The Glacial(MIS 3-2)Outlet Glacier of the Marsyandi Nadi-icestream-network with its Ngadi Khola Tributary Glacier(Manaslu-and Lamjung Himalaya):The Reconstructed Lowering of the Marsyandi Nadi Ice Stream Tongue down in to the Southern Himalaya Foreland

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Journal of Mountain Science 2014年第1期11卷 236-287页

作者： matthias KUHLE Department of Geography and High Mountain Geomorphology University of Gottingen

For the reconstruction of past climate variations,investigations on the history of glaciers are *** the Himalaya,investigations like these have a rather short tradition in comparison with other mountains on *** the same time,this area on the southern margin of Tibet is of special interest because of the question as to the monsoon-influence that is connected with the ***,the climate of High Asia is of global *** for the further and regionally intensifying answer to this question,a glacial glacier reconstruction is submitted from the CentralHimalaya,more exactly from the *** on down-valley from the glacial-historical investigations of 1977 in the upper Marsyandi Khola(Nadi) and the partly already published results of field campaigns in the middle Marsyandi Khola and the Damodar- and Manaslu Himal in the years 1995,2000,2004 and 2007,new geomorphological and geological field- and laboratory data are introduced here from the Ngadi(Nadi) Khola and the lower Marsyandi Nadi from the inflow of the Ngadi(Nadi) Khola down to the southern mountain *** has existed a connected ice-stream-network drained down to the south by a 2,100-2,200 m thick and 120 km long Marsyandi Nadi main valley *** a height of the valley bottom of c.1,000 m *** Ngadi Khola glacier joined the still c.1,300 m thick Marsyandi parent glacier from the Himalchuli-massif(Nadi(Ngadi) Chuli) – the south spur of the Manaslu *** here the united glacier tongue flowed down about a further 44 km to the south up to c.400 m a.s.l.(27°57'38 "N/84°24'56" E) into the Himalaya fore-chains and thus reached one of or the lowest past ice margin position of the *** glacial(LGP(Last glacial period),LGM(Last glacial maximum) Würm,Stage 0,MIS 3-2) climatic snowline(ELA = equilibrium line altitude) has run at 3,900 to 4,000 m *** thus c.1,500 altitude meters below the current ELA(Stage XII) at 5,400-5,500 m *** r

关键词： Ice Age Glaciation Himalaya Manaslu Ngadi Khola Icestream network Last Glacial period

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A Certifiable Framework for Health Monitoring and Management

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Transactions of Nanjing University of Aeronautics and Astronautics 2017年第3期34卷 229-246页

作者： matthias Buderath Airbus Defence and Space Willy-Messerschmitt-Strasse

The scope of this paper is to provide an E2 Eperspective of health monitoring and management(HMM)and structural health mornitoring(SHM)as an integrated system element of an integrated system health monitoring and management(ISHM)*** paper will address two main topics:(1)The importance of a diagnostics and prognostic requirements specification to develop an innovative health monitoring and management system;(2)The certification of a health monitoring and management system aiming at a maintenance credit as an integral part of the maintenance *** development of a maintenance program which is based on combinations of different types of strategies(preventive,condition-based maintenance(CBM)and corrective maintenance…)for different subsystems or components and structures of complex systems like an aircraft to achieve the most optimized solution in terms of availability,cost and safety/certification is a real *** maintenance strategy must satisfy the technical-risk and cost feasibility of the maintenance program.

关键词： maintenance certification aircraft innovative diagnostics specification satisfy aiming prognostic challenge

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