Late Aptian long‐lived glacio‐eustatic lowstand recorded on the Arabian Plate     

Florian Maurer  Frans S.P. van Buchem  Gregor P. Eberli  Bernard J. Pierson  Madeleine J. Raven  Poul‐Henrik Larsen  Moujahed I. Al‐Husseini  Benoit Vincent 《地学学报》2013,25(2):87-94

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Biomotoring groundwater contamination: Application to a karst area in Southern France   总被引：1，自引：0，他引：1  

Florian Malard  Jacques Mathieu  Jean-Louis Reygrobellet  Michel Lafont 《Aquatic Sciences - Research Across Boundaries》1996,58(2):158-187

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Fortresses of desire: Melrose Arch and the emergence of urban tourist spectacles     

Teresa Dirsuweit  Florian Schattauer 《GeoJournal》2004,60(3):239-247

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Solar particle events seen by the MOPITT instrument     

Florian Nichitiu  James R. Drummond  Jiansheng Zou  Robert Deschambault 《Journal of Atmospheric and Solar》2004,66(18):40

This paper reports on Device Single Events (DSEs) occurring in the Measurements Of Pollution In The Troposphere (MOPITT) space instrument piezoelectric accelerometers. It is found that DSEs correlate with the radiation environment, solar activity and high intensity Solar Proton Events.  相似文献   

Defining biominerals and organominerals: Direct and indirect indicators of life. Perry et al., Sedimentary Geology, 201, 157–179     

Wladyslaw Altermann  Christine Böhmer  Frank Gitter  Florian Heimann  Inga Heller  Benjamin Läuchli  Constanze Putz 《Sedimentary Geology》2009,213(3-4):150-151

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Distribution patterns and stable carbon isotopic composition of alkanes and alkan-1-ols from plant waxes of African rain forest and savanna C3 species     

Angela Vogts  Heiko Moossen  Florian Rommerskirchen  Jürgen Rullkötter 《Organic Geochemistry》2009,40(10):1037-1054

Leaf wax components of terrestrial plants are an important source of biomass in the geological records of soils, lakes and marine sediments. Relevant to the emerging use of plant wax derived biomarkers as proxies for past vegetation composition this study provides key data for C₃ plants of tropical and subtropical Africa. We present analytical results for 45 savanna species and 24 rain forest plants sampled in their natural habitats. Contents and distribution patterns of long chain n-alkanes (n-C₂₅ to n-C₃₅) and n-alkan-1-ols (n-C₂₄ to n-C₃₄) as well as bulk and molecular carbon isotopic data are presented. The variations of the analysed parameters among different growth forms (herb, shrub, liana and tree) are small within the vegetation zones, whereas characteristic differences occur between the signatures of rain forest and savanna plants. Therefore, we provide averaged histogram representations for rain forest and savanna C₃ plants.The findings were compared to previously published data of typical C₄ grass waxes of tropical and subtropical Africa. Generally, trends to longer n-alkane chains and less negative carbon isotopic values are evident from rain forest over C₃ savanna to C₄ vegetation. For n-alkanols of rain forest plants the maximum of the averaged distribution pattern is between those of C₃ savanna plants and C₄ grasses. The averaged presentations for tropical and subtropical vegetation and their characteristics may constitute useful biomarker proxies for studies analysing the expansion and contraction of African vegetation zones.  相似文献   

Assessing the Perth Basin geothermal opportunity: Preliminary results from simulations of heat transfer and fluid flow     

Heather A. Sheldon  Thomas Poulet  J. Florian Wellmann  Klaus Regenauer-Lieb  Mike Trefry  Franklin G. Horowitz  Klaus Gessner 《Journal of Geochemical Exploration》2009

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Contrasting fluid evolution of granulite-facies marbles: implications for a high-T intermediate-P terrain in the Famatinian Range, San-Juan, Argentina     

Florian Gallien  Aberra Mogessie  Ernesto Bjerg  Sergio Delpino  Brigida Castro de Machuca 《Mineralogy and Petrology》2009,95(1-2):135-157

High-temperature, intermediate-pressure calc-silicate marbles occur in the granulite-facies terrain of the La Huerta Range in the Province of San Juan, NW-Argentina, in three bulk-compositional varieties: Type (1) dolomite-absent scapolite-wollastonite-grandite-clinopyroxene-quartz—calcite marbles; Type (2) diopside-forsterite-spinel-corundum—calcite marbles with dolomite exolution lamellae in calcite; Type (3) serpentinized forsterite-spinel-dolomite marbles. An isobaric cooling path from peak-metamorphic conditions of 860°C to 750°C at 6.5 kbar is inferred from scapolite-wollastonite-grandite reaction textures in Type (1) and is consistent with cooling after an advective heat input from related gabbroic and tonalitic intrusive bodies. Stable carbon and oxygen isotope geochemistry was used to decipher the fluid/rock evolution of the three marble types. An interpreted four-stage temperature-time-fluid flow path comprises: (1) infiltration of pre-peak-metamorphic fluids, depleted in δ¹⁸O, that caused a shift of primary sedimentary δ¹⁸O ratios to lower values (19.6–20.0); (2) syn-metamorphic fluid liberation from Type (1) marbles with evidence for processes close to batch devolatilization that caused a weak coupled ¹³C and ¹⁸O depletion during prograde metamorphism. A different devolatilization behaviour, close to Rayleigh fractionation, texturally associated with fold settings indicates that granulite-facies fluid flow was focused rather than pervasive; (3) H₂O-absent conditions were dominant when coronal grandite formed during incipient high-temperature isobaric cooling at the expense of scapolite and wollastonite in the Type (1) marbles; (4) intense post-peak- hydration of Type (2) and Type (3) marbles is the last recognizable metasomatic event. In combination, the three marble types record fluid infiltration both before and after the metamorphic peak.  相似文献   

Textural, chemical, and isotopic effects of late-magmatic carbonatitic fluids in the carbonatite–syenite Tamazeght complex, High Atlas Mountains, Morocco     

Michael A. W. Marks  Florian Neukirchen  Torsten Vennemann  Gregor Markl 《Mineralogy and Petrology》2009,97(1-2):23-42

Carbonatites of the Eocene Tamazeght complex, High Atlas Mountains, Morocco, consist of calciocarbonatites (alvikite and sövite dykes) and magnesiocarbonatites (diatreme breccias and dykes rocks). These are associated with ultramafic, shonkinitic, gabbroic to monzonitic and various foid syenitic silicate units. Stable and radiogenic isotope compositions for carbonatites and silicate rocks indicate that they share a common source in the mantle, although for some carbonatitic samples contamination with sedimentary rocks seems important. The observed isotopic heterogeneity is mainly attributed to source characteristics, fractional crystallization (accompanied by various degrees of assimilation), and late- to post-magmatic fluid–rock interaction. During the late fluid–rock interaction, Sr, Mn, and possibly also Fe were mobilized and redistributed to form secondary carbonate minerals in carbonatites. These fluids also penetrated into the adjacent syenitic rocks, causing enrichment in the same elements.  相似文献   

Landslides, Ice Quakes, Earthquakes: A Thermodynamic Approach to Surface Instabilities     

Klaus Regenauer-Lieb  David A. Yuen  Florian Fusseis 《Pure and Applied Geophysics》2009,166(10-11):1885-1908

The total rate of rock deformation results from competing deformation processes, including ductile and brittle mechanisms. Particular deformation styles arise from the dominance of certain mechanisms over others at different ambient conditions. Surprisingly, rates of deformation in naturally deformed rocks are found to cluster around two extremes, representing coseismic slip rates or viscous creep rates. Classical rock mechanics is traditionally used to interpret these instabilities. These approaches consider the principle of conservation of energy. We propose to go one step further and introduce a nonlinear far-from-equilibrium thermodynamic approach in which the central and explicit role of entropy controls instabilities. We also show how this quantity might be calculated for complex crustal systems. This approach provides strain-rate partitioning for natural deformation processes occurring at rates in the order of 10^-3 to 10^-9 s^-1. We discuss these processes using examples of landslides and ice quakes or glacial surges. We will then illustrate how the mechanical mechanisms derived from these near-surface processes can be applied to deformation near the base of the seismogenic crust, especially to the phenomenon of slow earthquakes.  相似文献