| | 1. | The geochemical signature caused by earthquake propagation in carbonate-hosted faults
Earth and Planetary Science Letters, Volume 310, Issues 3-4, 15 October 2011, Pages 225-232
Nicola De Paola, Giovanni Chiodini, Takehiro Hirose, Carlo Cardellini, Stefano Caliro, Toshihiko Shimamoto
Highlights► Faults are lubricated during earthquake propagation. ► Earthquake propagation in carbonates produces fault zone isotopic fractionation. ► Co-seismic isotopic fractionation can produce measurable geochemical anomalies. ► Results apply to geochemical monitoring of groundwater in seismically active areas. ► Results provide insights into seismic fault zone processes.
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| | 3. | Environmental effects of Deccan volcanism across the Cretaceous–Tertiary transition in Meghalaya, India
Earth and Planetary Science Letters, Volume 310, Issues 3-4, 15 October 2011, Pages 272-285
B. Gertsch, G. Keller, T. Adatte, R. Garg, V. Prasad, Z. Berner, D. Fleitmann
Highlights► Um Sohryngkew section of Meghalaya has the most complete KTB transition in India. ► Ir and other PGEs and TEs in KTB clay reveal impact source plus redox conditions. ► Humid conditions contrast with aridity induced by Deccan volcanism in central India. ► Super-stressed environment prior to KTB correlates with main Deccan pulse in C29r.
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| | 4. | Chlorine isotope evidence for multicomponent mantle metasomatism in the Ivrea Zone
Earth and Planetary Science Letters, Volume 310, Issues 3-4, 15 October 2011, Pages 429-440
Jane Selverstone, Zachary D. Sharp
Highlights► We document δ37Cl values of −2 to >+2‰ in metasomatized mantle peridotites. ► Three-component mixing occurred between harzburgite and slab-derived fluids/melts. ► High δ37Cl, δD, Cr, LILE, HFSE fluid came from serpentinites±altered oceanic crust. ► Low-δ37Cl hydrous clinopyroxenite component reflects sediment-modified mantle melt. ► Fluid/melt infiltration was both pervasive and channelized.
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| | 5. | Implications ofin situcalcification for photosynthesis in a ~ 3.3 Ga-old microbial biofilm from the Barberton greenstone belt, South Africa
Earth and Planetary Science Letters, Volume 310, Issues 3-4, 15 October 2011, Pages 468-479
Frances Westall, Barbara Cavalazzi, Laurence Lemelle, Yves Marrocchi, Jean-Noël Rouzaud, Alexandre Simionovici, Murielle Salomé, Smail Mostefaoui, Caroline Andreazza, Frédéric Foucher, Jan Toporski, Andrea Jauss, Volker Thiel, Gordon Southam, Lachlan MacLean, Susan Wirick, Axel Hofmann, Anders Meibom, François Robert, Christian Défarge
Highlights► In situcalcification (aragonite) of a 3.3Ga photosynthetic microbial biofilm. ► Calcification related to sulphur reducing bacteria activity. ► Oldest known occurrence of aragonite.
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| | 7. | Top-/bottom-soil ratios and Enrichment Factors: What do they really show?
Original Research Article
Applied Geochemistry, Available online 29 September 2011
Julie Sucharovà, Ivan Suchara, Marie Hola, Sarka Marikova, Clemens Reimann, Rognvald Boyd, Peter Filzmoser, Peter Englmaier
Highlights► Element concentrations are compared for soil O- and B-horizon samples collected at the scale of the Czech Republic. ► Top-/bottom soil ratios do not provide a valid tool to differentiate between anthropogenic and geogenic element sources. ► Enrichment factors do not provide a valid tool to differentiate between anthropogenic and geogenic element sources.
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| | 8. | Metallogeny and environmental impact of Hg in Zn deposits in China
Original Research Article
Applied Geochemistry, Available online 29 September 2011
Runsheng Yin, Xinbin Feng, Zhonggen Li, Qian Zhang, Xianwu Bi, Guanghui Li, Jinling Liu, Jingjing Zhu, Jianxu Wang
Highlights► We investigated mercury distribution in 100 Zn ore deposits with four typical ore types in China. ► We found that Hg concentrations in Zn concentrates vary largely depending on the ore types and geneses. ► We explained the variation of Hg concentrations in Zn ores among different types. ► Based on Hg distribution data, we estimated annual Hg emission from Zn smelting in China.
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| | 9. | Microbial diversity of the 180 million-year-old Toarcian argillite from Tournemire, France
Original Research Article
Applied Geochemistry, Available online 29 September 2011
Laurent Urios, François Marsal, Delphine Pellegrini, Michel Magot
Highlights► The cultivable microbial diversity of the argillite of Tournemire was characterized. ► The biodiversity of the undisturbed argillite is limited to three Gram-positive genera. ► That of EDZ differed, depending mainly on oxygen availability and moisture content. ► The overall metabolic diversity is limited to a few trophic groups. ► All attempts of DNA extraction for molecular approaches failed.
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| | 11. | Modeling the effect of stratification on cemented layer formation in sulfide-bearing mine tailings
Original Research Article
Applied Geochemistry, Available online 29 September 2011
Jeannet A. Meima, Torsten Graupner, Dieter Rammlmair
Highlights► Stratification was found to play a crucial role in cemented layer formation. ► Mica-rich layer below iron-sulfide rich layer results in jarosite-rich cemented layer. ► Arsenopyrite-rich layer results in amorphous FeAsO4-rich cemented layer. ► Pore area becomes disconnected if porosity decreases below 15%=>reduced O2diffusion.
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| | 14. | The volcanic evolution of Martinique Island: insights from K-Ar dating into the Lesser Antilles arc migration since the Oligocene
Original Research Article
Journal of Volcanology and Geothermal Research, Available online 29 September 2011
Aurélie Germa, Xavier Quidelleur, Shasa Labanieh, Catherine Chauvel, Pierre Lahitte
Highlights► In Martinique, the old Lesser Antilles arc was active from 24.8±0.4 to 20.8±0.4Ma. ► The intermediate arc was active in Martinique from 16.1±0.2 to 7.1±0.1Ma. ► Recent Lesser Antilles arc lavas have been erupted from ~5.5Ma to the present time. ► The front migrated westward at ~1.6km/Myr due to flattening of the northern slab. ► Aseismic ridges have flattened the slab and influenced spacing of magmatic diapirs.
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| | 16. | Phytoplankton dynamics across the Ordovician/Silurian boundary at low palaeolatitudes: correlations with carbon isotopic and glacial events
Original Research Article
Palaeogeography, Palaeoclimatology, Palaeoecology, Available online 29 September 2011
A. Delabroye, A. Munnecke, M. Vecoli, P. Copper, N. Tribovillard, M.M. Joachimski, A. Desrochers, T. Servais
Highlights► Phytoplankton dynamics and carbon geochemistry across the O/S boundary on Anticosti are compared ► Acritarchs display a turn-over during the early Hirnantian when D13C begins to rise ► They display a crisis during the late Hirnantian when D13C are maximal ► The phytoplanktonic events correlate with the development of ice-sheets on Gondwana>Similar phytoplankton events are recorded on Gondwana
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| | 17. | The Toba Caldera Complex
Original Research Article
Quaternary International, Available online 29 September 2011
Craig A. Chesner
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| | 18. | Geochemical influence of waste trench no. 22T at Chernobyl Pilot Site at the aquifer: Long-term trends, governing processes, and implications for radionuclide migration
Original Research Article
Applied Geochemistry, Available online 28 September 2011
D. Bugai, E. Tkachenko, N. Van Meir, C. Simonucci, A. Martin-Garin, C. Roux, C. Le Gal La Salle, Yu. Kubko
Highlights► Groundwater geochemistry data set for a waste trench in Chernobyl zone is analyzed. ► Leaching losses from the trench are governed by degradation of buried organic matter. ► Geochemical impacts decrease in time due to humification of the organic matter. ► Additional factor controlling leaching losses is nutrient element uptake by vegetation. ► Evolution of geochemical regime favors attenuation of groundwater migration of90Sr.
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| | 22. | The Energetics of Nanophase Calcite
Original Research Article
Geochimica et Cosmochimica Acta, Available online 26 September 2011
Tori Z. Forbes, A.V. Radha, Alexandra Navrotsky
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| | 24. | The separate production of H2S from the thermal reaction of hydrocarbons with magnesium sulfate and sulfur: Implications for thermal sulfate reduction
Original Research Article
Applied Geochemistry, Available online 24 September 2011
Hong Lu, Paul Greenwood, Tengshui Chen, Jinzhong Liu, Ping’an Peng
Highlights► We contribute the compared results of TSR simulation experiments of hydrocarbon with metal sulfates and sulphur in gold-tube confined system. ► The product yields of TSR including organic and inorganic gaseous and their stable carbon, hydrogen isotopes were reported. H2S was largely produced at very low temperature (250oC) in Sulfur treated rather than at high temperature (above 450oC) in the MgSO4treated. ► MgSO4-TSR led to higher concentrations of CO2with depleted δ13C values which possibly derived from depleted gaseous hydrocarbon oxidation.
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