| | 1. | Formation of a zoned magma chamber and its temporal evolution during the historic eruptive activity of Tarumai Volcano, Japan: Petrological implications for a long-term forecast of eruptive activity of an active volcano
Original Research Article
Journal of Volcanology and Geothermal Research, In Press, Accepted Manuscript, Available online 20 May 2011
Mitsuhiro Nakagawa, Naoto Hiraga, Ryuta Furukawa
Research highlights► Tarumai volcano is one of the most active volcanoes in Japan and has repeated explosive and dome-forming eruption since AD 1667. It is feared that a near future eruption would cause serious hazard around the volcano. ► In order to mitigate the hazard, we have to realize the present state of the magma system beneath the volcano on the basis of petrological analysis of juvenile materials during the historic activity. ► Our petrological and geological analysis reveals that major felsic magma of the historic activity has been nearly exhausted now. ► Based on eruptive history and temporal evolution of magma system, we try to forecast long-term future eruptive activity of the volcano.
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| | 2. | Detecting competition in the fossil record: Support for character displacement among Ordovician brachiopods
Original Research Article
Palaeogeography, Palaeoclimatology, Palaeoecology, In Press, Accepted Manuscript, Available online 20 May 2011
Carrie L. Tyler, Lindsey R. Leighton
Highlights► Examining character displacement in a Paleozoic brachiopod community ► Pre- and post-invasion incumbent morphologies were distinct ► Morphological disparity between invaders and incumbents was greatest post-invasion ► Landmarks driving disparity shift away from invader in morphospace ► Presence of character displacement suggests a discernable role for competition
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| | 3. | Stable isotope (δ13Ccarb & org, δ15Norg) and trace element anomalies during the Late Devonian ‘punctata Event’ in the Western Canada Sedimentary Basin
Original Research Article
Palaeogeography, Palaeoclimatology, Palaeoecology, In Press, Accepted Manuscript, Available online 20 May 2011
Maciej G. Śliwiński, Michael T. Whalen, Rainer J. Newberry, Joshua H. Payne, Jed E. Day
Highlights► Trace element proxies are applied in a carbonate depositional environment. ► Trace elements indicate short-term changes in bioproductivity of Late Devonian ocean. ► Carbon and nitrogen isotopes reveal short-term eutrophication during punctata Event.
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| | 4. | Reconstruction of Neogene zonal vegetation in South China using the Integrated Plant Record (IPR) analysis
Original Research Article
Palaeogeography, Palaeoclimatology, Palaeoecology, In Press, Accepted Manuscript, Available online 20 May 2011
Frédéric M.B. Jacques, Gongle Shi, Weiming Wang
Highlights► Neogene palaeovegetations of China are reconstructed using the IIPR analysis. ► The palaeovegetations reconstructed in China show a clear latitudinal gradient. ► There is an East-West aridity gradient that is less pronounced in the Late Miocene.
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| | 5. | Quantification of a greenhouse hydrologic cycle from equatorial to polar latitudes: The mid-Cretaceous water bearer revisited
Original Research Article
Palaeogeography, Palaeoclimatology, Palaeoecology, In Press, Accepted Manuscript, Available online 20 May 2011
Marina B. Suarez, Luis A. González, Gregory A. Ludvigson
Highlights► We update a mass balance model to quantify the mid-Cretaceous hydrologic cycle. ► The model includes both calcite and siderite data as proxies of precipitation δ18O. ► To balance the model, precipitation and evaporation fluxes must increase. ► Relative humidity decreased in the subtropics, and tropical seawater δ18O enriched. ► The model is sensitive to the origin, pathway and size of water vapor reservoir.
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| | 8. | Geochemical fingerprinting of the widespread Toba tephra using biotite compositions
Original Research Article
Quaternary International, In Press, Accepted Manuscript, Available online 20 May 2011
Victoria C. Smith, Nicholas J.G. Pearce, Naomi E. Matthews, John A. Westgate, Michael D. Petraglia, Michael Haslam, Christine S. Lane, Ravi Korisettar, J.N. Pal
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| | 10. | A Paleozoic subduction complex in Korea: SHRIMP zircon U-Pb ages and tectonic implications
Original Research Article
Gondwana Research, In Press, Accepted Manuscript, Available online 19 May 2011
Sung Won, Kim | Sanghoon, Kwon | M., Santosh | Ian S., Williams | Keewook, Yi
Graphical abstract
Research highlights► SHRIMP zircon U-Pb ages from the Paleozoic Wolhyeonri tectonic complex. ► Paleozoic arc magmatism generated through a subduction process. ► Paleozoic subduction and subsequent collision related to the evolution of Gondwana-derived blocks.
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| | 11. | Geotectonic framework of Permo-Triassic magmatism within the Korean Peninsula
Original Research Article
Gondwana Research, In Press, Accepted Manuscript, Available online 19 May 2011
Sung Won Kim, Sanghoon Kwon, Hee Jae Koh, Keewook Yi, Youn-Joong Jeong, M. Santosh
Research highlights► Triassic syenite-monzonite-gabbro suite in South Korea possess post-collisional high-K calcalkaline and shoshonitic affinity. ► Permo-Triassic high- to medium-K calc-alkaline granites to granodiorites in South Korea suggest formation in a subduction setting, with evidence for minor crustal thickening and subsequent lithospheric delamination during collision. ► The origin and geodynamic setting of the Permo-Triassic plutons provide important constraints on the tectonic history of the Sino-Korean region in East Asia.
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| | 12. | Influence of CO2 on New Albany Shale composition and pore structure
Original Research Article
International Journal of Coal Geology, In Press, Accepted Manuscript, Available online 19 May 2011
Richard Lahann, Maria Mastalerz, John A. Rupp, Agnieszka Drobniak
Research highlights► Low CO2-pressure studies indicate that heating CO2-saturated shales does not change the porosity structure relative to heating shales in distilled water or brine only (native state) environment. ► High CO2-pressure studies indicate that carbonate minerals enter solution when contacted by CO2-enriched fluids. Ca and Mg concentrations in filtrate fluids generally increase with the pressure of the CO2. The ion ratios suggest that the dissolving phases may be dolomite/ankerite along with variable amounts of calcite. ► The brine chemistry and SEM analysis indicate that one of the first responses to injection of CO2 into a New Albany Shale reservoir will be carbonate dissolution. ► The long-term effect of CO2 injection on the brine chemistry and pore system mineralogy of the New Albany Shale is highly uncertain. Buffering of the CO2−driven pH drop may involve reprecipitation of some of the dolomite/ankerite-sourced cations. The buffering process may release additional iron (from chlorite) to solution. The combination of aqueous iron and pH rise may lead to iron oxyhydroxide precipitation. Alternatively, the high TOC present in the shales such as the New Albany Shale may maintain all aqueous iron as ferrous (not ferric) species. The net effect of carbonate dissolution/buffering reactions on the pore system and permeability of the shale system also is not known. Theoretical modeling of such complex reaction pathways will require well-calibrated reaction kinetics for multiple mineral phases, including redox changes, as well as reaction kinetics for kerogen and aqueous species.
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| | 14. | How Do Flow Peaks and Durations Change in Suburbanizing Semi-Arid Watersheds? A Southern California Case Study
Original Research Article
Journal of Hydrology, In Press, Accepted Manuscript, Available online 19 May 2011
Robert J. Hawley, Brian P. Bledsoe
Highlights► At 20% watershed imperviousness, the 2-yr peak flow increased by a factor of 6 ► At 20% imperviousness, durations of mean daily flows of ∼30 m3/s increased 3-fold ► Duration density functions are a novel method to develop histogram flow durations ► Results are consistent with geomorphic instability associated with S.CA urbanization
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| | 16. | Geochemical characterization of secondary microbial gas occurrence in the Songliao Basin, NE China
Original Research Article
Organic Geochemistry, In Press, Accepted Manuscript, Available online 19 May 2011
Shuichang Zhang, Haiping Huang, Zihui Feng, Yanhua Shuai
Highlights► Molecular and isotopic compositions of natural gases from the Songliao Basin indicate that varying genetic gas types exist in the shallow reservoirs including thermogenic gas, low maturity gas, primary microbial gas and secondary microbial gas. ► Convincing evidence of gas biodegradation is present and various geochemical parameters can be used discriminate secondary microbial gas from primary microbial gas. ► Biodegradation and carbon dioxide conversion produced gases with widely varying chemical and isotopic compositions. ► Rayleigh kinetic models that describe closed systems are not applicable to the Songliao Basin.
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| | 18. | Geochemistry of natural chromium occurrence in a sandstone aquifer in Bauru Basin, São Paulo State, Brazil
Original Research Article
Applied Geochemistry, In Press, Accepted Manuscript, Available online 18 May 2011
Reginaldo Bertolo, Christine Bourotte, Ricardo Hirata, Leonardo Marcolan, Ondra Sracek
Highlights► Geochemical anomaly of chromium in quartzose sandstones (221 ppm); ► Groundwater with naturally concentrations of Cr(VI) of up to 0.13 mg.L-1, associated with aquifer levels with high redox and pH values (over 10). ► Chromium diopsides and iron hydroxides may be the sources of Cr(III); ► Manganese oxides may oxidize Cr(III) to Cr(VI); ► A small amount of adsorbed Cr(VI) may be released to groundwater due to pH conditions.
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| | 19. | Dissolved organic matter dynamic in the Amazon basin: Sorption by mineral surfaces
Original Research Article
Chemical Geology, In Press, Accepted Manuscript, Available online 18 May 2011
Marcela A.P. Pérez, Patricia Moreira-Turcq, Hervé Gallard, Thierry Allard, Marc F. Benedetti
Research highlights► Organic matter (OM) dynamic in one of the largest watershed in the world. ► High molecular weight and aromatic rich OM is sorbed preferential by minerals. ► Lower molecular weight OM migrates deeper in soils to reach the higher order rivers. ► Suspended minerals induce a second fractionation between dissolved and sorbed OM. ► The residual negative charge of the DOM will decide its fate in pedogenic processes
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| | 20. | Thermo-chemical evolution and global contraction of mercury
Earth and Planetary Science Letters, In Press, Corrected Proof, Available online 18 May 2011
M. Grott, D. Breuer, M. Laneuville
Research Highlights► Mercury's thermal and chemical evolution is modeled. ► An insulating crust and regolith layer slows planetary cooling. ► Volcanism persists up to 2.5 Gyr after core formation. ► Small radial contraction is found to be compatible with a volatile rich composition.
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| | 21. | A Neoarchean dismembered ophiolite complex from southern India: Geochemical and geochronological constrains on its suprasubduction origin
Original Research Article
Gondwana Research, In Press, Accepted Manuscript, Available online 18 May 2011
T., Yellappa | M., Santosh | T.R.K., Chetty | Sanghoon, Kwon | Chansoo, Park | P., Nagesh | D.P., Mohanty | V., Vekatasivappa
Graphical abstract
Research highlights► Discovery of a Neoarchean suprasubduction ophiolite from southern India. ► U-Pb dating of zircons from trondhjemites yield ~ 2.5 Ga. ► Neoarchean ocean closure along the southern margin of the Dharwar Craton.
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| | 22. | Using a Binary Logistic Regression Method and GIS for Evaluating and Mapping the Groundwater Spring Potential in the Sultan Mountains (Aksehir, Turkey)
Original Research Article
Journal of Hydrology, In Press, Accepted Manuscript, Available online 18 May 2011
Adnan Ozdemir
Highlights► The logistic regression approach has not yet been used to delineate groundwater potential zones. ► In this study we attempted to identify groundwater potential zones using logistic regression method. ► The logistic regression method was used to locate potential zones for groundwater in the Sultan Mountains. ► The evolved model was found to be in strong agreement with available groundwater spring test data. ► Hence, this method can be used routinely in groundwater exploration in favourable geological conditions.
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| | 24. | Rapid locking of tectonic magnetic fabrics in weakly deformed mudrocks
Original Research Article
Tectonophysics, In Press, Accepted Manuscript, Available online 18 May 2011
Juan C. Larrasoaña, Miriam Gómez-Paccard, Santiago Giralt, Andrew P. Roberts
Research highlights► Sediments from Lake Issyk-Kul (Tien Shan) display typical tectonic AMS fabrics. ► Sediments as young as 25 yr record these clear tectonic fabrics. ► Such tectonic fabrics are locked within sediments older than ca 1 kyr cal BP. ► This indicates a very rapid locking of tectonic fabrics after sediment deposition. ► This validates the use of magnetic fabrics of mudrocks for tectonic studies.
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| | 25. | Stable isotopic and geochemical data for inferring sources of recharge and groundwater flow on the volcanic island of Rishiri, Japan
Original Research Article
Applied Geochemistry, In Press, Accepted Manuscript, Available online 17 May 2011
Ajit K. Mandal, Jing Zhang, Kazuyoshi Asai
Highlights► To constrain the recharge areas and flow paths of SGD in Rishiri Island. ► To determine the local meteoric water lines of Rishiri Island. ► An altitude effect of -0.12 ‰ per 100 m for δ18O was found. ► In temperate zone, the importance of winter precipitation in groundwater recharge. ► The submarine groundwater discharge (SGD) had a deeper flow system and longer flow paths than did spring water.
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