ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Publication Date: 2019
    Description: Abstract Martian magmas were likely enriched in S and Cl with respect to H2O. Exsolution of a vapor phase from these magmas and ascent of the gas bubbles through the magma plumbing system would have given rise to shallow magmas that were gas‐charged. Release and cooling of this gas from lava flows during eruption may have resulted in the addition of a significant amount of vapor‐deposited phases to the fines of the surface. Experiments were conducted to simulate degassing of gas‐charged lava flows and shallow intrusions in order to determine the nature of vapor‐deposited phases that may form through this process. The results indicate that magmatic gas may have contributed a large amount of Fe, S, and Cl to the Martian surface through the deposition of iron oxides (magnetite, maghemite, and hematite), chlorides (molysite, halite, and sylvite), sulfur, and sulfides (pyrrhotite and pyrite). Primary magmatic vapor‐deposited minerals may react during cooling to form a variety of secondary products, including iron oxychloride (FeOCl), akaganéite (Fe3+O (OH,Cl)), and jarosite (KFe3+3(OH)6(SO4)2). Vapor‐deposition does not transport significant amounts of Ca, Al, or Mg from the magma and hence, this process does not directly deposit Ca‐ or Mg‐sulfates.
    Print ISSN: 2169-9097
    Electronic ISSN: 2169-9100
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Publication Date: 2013-04-26
    Description: [1]  Spectral and imaging data sets from Mars Reconnaissance Orbiter and Mars Odyssey, as well as spectral and topographic data from Mars Global Surveyor, are used to understand the origin of in-place rock units found in the intercrater plains and Hellas-circumferential graben floors of Noachis Terra, Mars. The rocky units are interpreted as effusive volcanic plains, on the basis of broad areal extent, structural competence, association with topographic lows, distinct mineralogy from regolith, and lack of sedimentary textures or minerals associated with aqueous processes. Some rocky expanses contain at least two compositionally distinct units. The relatively light-toned unit exhibits a higher plagioclase/pyroxene ratio than the lower, dark-toned unit. Both units exhibit ~10% olivine enrichment compared to surrounding regolith. These units are heavily degraded and exhibit crater model ages between ~3.80–4.0 Ga, making these some of the oldest preserved volcanic plains accessible by remote sensing. They are found in association with Hellas ring structures, where the westward extent of these rocky units is limited to the outermost ring structure. Fracturing associated with the Hellas impact may have enabled magmas to ascend from the base of the crust in the circum-Hellas region. Identification of these units as volcanic materials extends previous estimates for volume of outgassed volatiles. Though the estimated volcanic volume increase is minor, the local effects could have been significant. The role of multi-ring impact basins in providing a spatial control on Martian highlands volcanism and subsurface mineralization may have been underestimated in the past.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Publication Date: 2014-10-31
    Description: The evidence for sulfate-bearing strata, across Late-Noachian to Amazonian eons, suggests a central role for sulfates in acidity and salinity of martian paleo-fluids and the planet's habitability. However, details remain unclear owing to shallow sampling and the limited ability of visible/near-infrared spectroscopy to distinguish among some sulfates. Using chemical data from the Mars Odyssey GRS, including the sulfur map of Mars, we confirm the possibility of hydrous sulfates acting as key hydrates throughout the Southern mid-latitudinal soil at decimeter depths. An H 2 O : S molar ratio between 2.4 and 4.0 for 80% of the midlatitudes is also consistent with hydrous sulfate phases, including the many Fe-sulfates hydrated in this range, or mixtures of Ca- and Mg- sulfates. Nevertheless, hydrous Fe-sulfates could explain our observations in a simpler manner relative to Ca-/Mg- mixtures. Furthermore, phyllosilicates, zeolites, amorphous phases, and H 2 O(s) do not seem strong candidates to explain the H-S variations. Consequently, we speculate that sulfates, as the primary contributor of H 2 O in bulk soil, may influence modern aqueous processes including warm-season slope lineae in the Southern hemisphere.
    Print ISSN: 0094-8276
    Electronic ISSN: 1944-8007
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Publication Date: 2015-03-26
    Description: Current or past brine hydrologic activity on Mars may provide suitable conditions for the formation of amorphous ferric sulfates. Once formed, these phases would likely be stable under current Martian conditions, particularly at low- to mid-latitudes. Therefore, we consider amorphous iron sulfates (AIS) as possible components of Martian surface materials. Laboratory AIS were created through multiple synthesis routes, and characterized with total x-ray scattering, thermogravimetric analysis, scanning electron microscopy, visible/near-infrared (VNIR), thermal infrared (TIR), and Mössbauer techniques. We synthesized amorphous ferric sulfates (Fe(III) 2 (SO 4 ) 3 •~6-8H 2 O) from sulfate-saturated fluids via vacuum dehydration or exposure to low relative humidity (〈11%). Amorphous ferrous sulfate (Fe(II)SO 4 •~1H 2 O) was synthesized via vacuum dehydration of melanterite. All AIS lack structural order beyond 11 Å. The short-range (〈5 Å) structural characteristics of amorphous ferric sulfates resemble all crystalline reference compounds; structural characteristics for the amorphous ferrous sulfate are similar to but distinct from both rozenite and szomolnokite. VNIR and TIR spectral data for all AIS display broad, muted features consistent with structural disorder and are spectrally distinct from all crystalline sulfates considered for comparison. Mössbauer spectra are also distinct from crystalline phase spectra available for comparison. AIS should be distinguishable from crystalline sulfates based on the position of their Fe-related absorptions in the visible range and their spectral characteristics in the TIR. In the NIR, bands associated with hydration at ~1.4 and 1.9 µm are significantly broadened, which greatly reduces their detectability in soil mixtures. AIS may contribute to the amorphous fraction of soils measured by the Curiosity rover.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Publication Date: 2004-08-07
    Description: The Miniature Thermal Emission Spectrometer (Mini-TES) on Spirit has studied the mineralogy and thermophysical properties at Gusev crater. Undisturbed soil spectra show evidence for minor carbonates and bound water. Rocks are olivinerich basalts with varying degrees of dust and other coatings. Dark-toned soils observed on disturbed surfaces may be derived from rocks and have derived mineralogy (+/-5 to 10%) of 45% pyroxene (20% Ca-rich pyroxene and 25% pigeonite), 40% sodic to intermediate plagioclase, and 15% olivine (forsterite 45% +/-5 to 10). Two spectrally distinct coatings are observed on rocks, a possible indicator of the interaction of water, rock, and airfall dust. Diurnal temperature data indicate particle sizes from 40 to 80 microm in hollows to approximately 0.5 to 3 mm in soils.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Christensen, P R -- Ruff, S W -- Fergason, R L -- Knudson, A T -- Anwar, S -- Arvidson, R E -- Bandfield, J L -- Blaney, D L -- Budney, C -- Calvin, W M -- Glotch, T D -- Golombek, M P -- Gorelick, N -- Graff, T G -- Hamilton, V E -- Hayes, A -- Johnson, J R -- McSween, H Y Jr -- Mehall, G L -- Mehall, L K -- Moersch, J E -- Morris, R V -- Rogers, A D -- Smith, M D -- Squyres, S W -- Wolff, M J -- Wyatt, M B -- New York, N.Y. -- Science. 2004 Aug 6;305(5685):837-42.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Geological Sciences, Arizona State University, Tempe, AZ 85287, USA. phil.christensen@asu.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15297667" target="_blank"〉PubMed〈/a〉
    Keywords: Carbonates ; Geologic Sediments ; Interferometry ; Iron Compounds ; Magnesium Compounds ; *Mars ; *Minerals ; Oxides ; Silicates ; Spectrum Analysis ; Temperature ; Water
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Publication Date: 2004-12-04
    Description: The Miniature Thermal Emission Spectrometer (Mini-TES) on Opportunity investigated the mineral abundances and compositions of outcrops, rocks, and soils at Meridiani Planum. Coarse crystalline hematite and olivine-rich basaltic sands were observed as predicted from orbital TES spectroscopy. Outcrops of aqueous origin are composed of 15 to 35% by volume magnesium and calcium sulfates [a high-silica component modeled as a combination of glass, feldspar, and sheet silicates (approximately 20 to 30%)], and hematite; only minor jarosite is identified in Mini-TES spectra. Mini-TES spectra show only a hematite signature in the millimeter-sized spherules. Basaltic materials have more plagioclase than pyroxene, contain olivine, and are similar in inferred mineral composition to basalt mapped from orbit. Bounce rock is dominated by clinopyroxene and is close in inferred mineral composition to the basaltic martian meteorites. Bright wind streak material matches global dust. Waterlain rocks covered by unaltered basaltic sands suggest a change from an aqueous environment to one dominated by physical weathering.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Christensen, P R -- Wyatt, M B -- Glotch, T D -- Rogers, A D -- Anwar, S -- Arvidson, R E -- Bandfield, J L -- Blaney, D L -- Budney, C -- Calvin, W M -- Fallacaro, A -- Fergason, R L -- Gorelick, N -- Graff, T G -- Hamilton, V E -- Hayes, A G -- Johnson, J R -- Knudson, A T -- McSween, H Y Jr -- Mehall, G L -- Mehall, L K -- Moersch, J E -- Morris, R V -- Smith, M D -- Squyres, S W -- Ruff, S W -- Wolff, M J -- New York, N.Y. -- Science. 2004 Dec 3;306(5702):1733-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Geological Sciences, Arizona State University, Tempe, AZ 85287, USA. phil.christensen@asu.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15576609" target="_blank"〉PubMed〈/a〉
    Keywords: Calcium Sulfate ; Extraterrestrial Environment ; Ferric Compounds ; Geologic Sediments ; Iron Compounds ; Magnesium Compounds ; Magnesium Sulfate ; *Mars ; *Minerals ; Silicates ; Spacecraft ; Sulfates ; Water
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Publication Date: 2014-01-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barbier, Edward B -- Moreno-Mateos, David -- Rogers, Alex D -- Aronson, James -- Pendleton, Linwood -- Danovaro, Roberto -- Henry, Lea-Anne -- Morato, Telmo -- Ardron, Jeff -- Van Dover, Cindy L -- England -- Nature. 2014 Jan 23;505(7484):475-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24459714" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anthozoa ; Aquatic Organisms ; Atlantic Ocean ; Biodiversity ; *Conservation of Natural Resources/economics/methods/trends ; *Ecology/economics/methods/trends ; *Ecosystem ; Fisheries/economics ; *Oceans and Seas
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Publication Date: 2008-07-26
    Description: The conservation status of 845 zooxanthellate reef-building coral species was assessed by using International Union for Conservation of Nature Red List Criteria. Of the 704 species that could be assigned conservation status, 32.8% are in categories with elevated risk of extinction. Declines in abundance are associated with bleaching and diseases driven by elevated sea surface temperatures, with extinction risk further exacerbated by local-scale anthropogenic disturbances. The proportion of corals threatened with extinction has increased dramatically in recent decades and exceeds that of most terrestrial groups. The Caribbean has the largest proportion of corals in high extinction risk categories, whereas the Coral Triangle (western Pacific) has the highest proportion of species in all categories of elevated extinction risk. Our results emphasize the widespread plight of coral reefs and the urgent need to enact conservation measures.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Carpenter, Kent E -- Abrar, Muhammad -- Aeby, Greta -- Aronson, Richard B -- Banks, Stuart -- Bruckner, Andrew -- Chiriboga, Angel -- Cortes, Jorge -- Delbeek, J Charles -- Devantier, Lyndon -- Edgar, Graham J -- Edwards, Alasdair J -- Fenner, Douglas -- Guzman, Hector M -- Hoeksema, Bert W -- Hodgson, Gregor -- Johan, Ofri -- Licuanan, Wilfredo Y -- Livingstone, Suzanne R -- Lovell, Edward R -- Moore, Jennifer A -- Obura, David O -- Ochavillo, Domingo -- Polidoro, Beth A -- Precht, William F -- Quibilan, Miledel C -- Reboton, Clarissa -- Richards, Zoe T -- Rogers, Alex D -- Sanciangco, Jonnell -- Sheppard, Anne -- Sheppard, Charles -- Smith, Jennifer -- Stuart, Simon -- Turak, Emre -- Veron, John E N -- Wallace, Carden -- Weil, Ernesto -- Wood, Elizabeth -- New York, N.Y. -- Science. 2008 Jul 25;321(5888):560-3. doi: 10.1126/science.1159196. Epub 2008 Jul 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉IUCN (International Union for Conservation of Nature) Species Programme Species Survival Commission (SSC), Biological Sciences, Old Dominion University, Norfolk, VA 23529, USA. kcarpent@odu.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18653892" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Anthozoa/classification/growth & development ; Caribbean Region ; *Climate ; Conservation of Natural Resources ; *Ecosystem ; *Extinction, Biological ; Greenhouse Effect ; Indian Ocean ; Pacific Ocean ; Risk Assessment ; *Seawater ; Species Specificity ; Temperature
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Publication Date: 2012-06-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Veitch, Liane -- Dulvy, Nicholas K -- Koldewey, Heather -- Lieberman, Susan -- Pauly, Daniel -- Roberts, Callum M -- Rogers, Alex D -- Baillie, Jonathan E M -- New York, N.Y. -- Science. 2012 Jun 15;336(6087):1383-5. doi: 10.1126/science.1223009.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Zoological Society of London, London NW1 4RY, UK. liane.veitch@zsl.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22700905" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Aquatic Organisms ; Biodiversity ; *Conservation of Natural Resources ; *Ecosystem ; *Fisheries ; Fishes ; *International Cooperation ; Oceans and Seas ; Public Policy ; *Seawater ; United Nations
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Publication Date: 2015-07-04
    Description: The ocean moderates anthropogenic climate change at the cost of profound alterations of its physics, chemistry, ecology, and services. Here, we evaluate and compare the risks of impacts on marine and coastal ecosystems-and the goods and services they provide-for growing cumulative carbon emissions under two contrasting emissions scenarios. The current emissions trajectory would rapidly and significantly alter many ecosystems and the associated services on which humans heavily depend. A reduced emissions scenario-consistent with the Copenhagen Accord's goal of a global temperature increase of less than 2 degrees C-is much more favorable to the ocean but still substantially alters important marine ecosystems and associated goods and services. The management options to address ocean impacts narrow as the ocean warms and acidifies. Consequently, any new climate regime that fails to minimize ocean impacts would be incomplete and inadequate.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gattuso, J-P -- Magnan, A -- Bille, R -- Cheung, W W L -- Howes, E L -- Joos, F -- Allemand, D -- Bopp, L -- Cooley, S R -- Eakin, C M -- Hoegh-Guldberg, O -- Kelly, R P -- Portner, H-O -- Rogers, A D -- Baxter, J M -- Laffoley, D -- Osborn, D -- Rankovic, A -- Rochette, J -- Sumaila, U R -- Treyer, S -- Turley, C -- New York, N.Y. -- Science. 2015 Jul 3;349(6243):aac4722. doi: 10.1126/science.aac4722.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire d'Oceanographie de Villefranche, CNRS-Institut National des Sciences de l'Univers, F-06230 Villefranche-sur-mer, France. Sorbonne Universites, Universite Pierre et Marie Curie, Univ Paris 06, Observatoire Oceanologique, F-06230 Villefranche-sur-mer, France. Institute for Sustainable Development and International Relations, Sciences Po, 27 rue Saint Guillaume, F-75007 Paris, France. gattuso@obs-vlfr.fr. ; Institute for Sustainable Development and International Relations, Sciences Po, 27 rue Saint Guillaume, F-75007 Paris, France. ; Secretariat of the Pacific Community, B.P. D5, 98848 Noumea Cedex, New Caledonia. ; Nippon Foundation-UBC Nereus Program, University of British Columbia (UBC), Vancouver, BC V6T 1Z4, Canada. ; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, D-27570, Bremenrhaven, Germany. ; Climate and Environmental Physics, Physics Institute and Oeschger Centre for Climate Change Research, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland. ; Centre Scientifique de Monaco, 8 Quai Antoine Ier, MC-98000 Monaco, Principality of Monaco. Institut Pierre Simon Laplace/Laboratoire des Science du Climat et de l'Environnement, UMR8212, CNRS-Commissariat a l'Energie Atomique et aux Energies Alternatives-Universite de Versailles Saint-Quentin-en-Yvelines, Gif sur Yvette, France. ; Ocean Conservancy, 1300 19th Street NW, 8th Floor, Washington, DC 20036, USA. ; Coral Reef Watch, National Oceanic and Atmospheric Administration, College Park, MD 20740, USA. ; Global Change Institute and Australian Research Council Centre for Excellence in Coral Reef Studies, University of Queensland, Building 20, St Lucia, 4072 Queensland, Australia. ; School of Marine and Environmental Affairs, University of Washington, 3707 Brooklyn Avenue NE, Seattle, WA 98105, USA. ; Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK. ; Scottish Natural Heritage, 231 Corstorphine Road, Edinburgh EH12 7AT, Scotland. ; IUCN, Rue Mauverney 28, CH-1196 Gland, Switzerland. ; Environment Laboratories, International Atomic Energy Agency, 4a Quai Antoine 1er, MC-98000 Monaco, Principality of Monaco. ; Program on Science, Technology, and Society, John F. Kennedy School of Government, Harvard University, 79 John F. Kennedy Street, Cambridge, MA 02138, USA. ; Institute for Sustainable Development and International Relations, Sciences Po, 27 rue Saint Guillaume, F-75007 Paris, France. Fisheries Economics Research Unit, University of British Columbia, Vancouver, BC V6T 1Z4, Canada. ; Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth PL1 3DH, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26138982" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aquaculture ; *Aquatic Organisms ; *Carbon Dioxide ; *Ecosystem ; *Global Warming ; *Greenhouse Effect ; Health ; Humans ; Oceans and Seas ; Risk ; Travel
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...