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  • 1980-1984  (9)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Tectonic implications of the mare-ridge pattern of the central parts of Oceanus Procellarum on the Moon (1980)
    Springer
    Earth, moon and planets 23 (1980), S. 307-321 
    Details
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract A structural analysis is presented of the mare ridge pattern in an area of about 1 000 000 km2 in the central parts of Oceanus Procellarum. The penetration of magmas through the crust at the Marius Hills and Aristarchus Plateau/Harbinger Mountains volcanic complexes may have happened along pre-existing deep zone of weakness. Associated with these zones are present mare ridge ranges, some of which can be regarded as having formed radial or subradial ridge swarms to the complexes as they were strengthened by stress field changes caused by upward doming and penetrating magmas. The present moonquake epicentres within this area seem to be connected with mare ridge ranges. Focal depths from about 800 to 1000 km indicate a decreasing trend of tectonic activity. One shallow moonquake epicentre also lies within the mare ridge sets.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00902046
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Tectonic pattern of the crater Grimaldi region of the Moon (1981)
    Springer
    Earth, moon and planets 24 (1981), S. 327-338 
    Details
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The tectonics of the Grimaldi area are described and analyzed in detail from high-resolution Lunar Orbiter photographs. Rille grabens are long and narrow fault zone structures of lunar terra. The polygonal rille graben pattern indicates the importance of lunar internal activity with an adjoining thin lithosphere in the areal tectonics at the time of rille grabening. The graben subsidence developed during tensional bending of this thin terra lithosphere. The en échelon graben offsets indicate the existence of strikeslip movements along the main fault under tensional lithosphere conditions. In some places mare ridge ranges continue in the direction of the rille graben indicating the connection of these structures to each other as part of the lunar tectonic evolution. The very thin mare lithosphere was affected more easily and over a longer period of time by lunar internal forces. The effect of older structural units is thus less conspicuous within mare areas. Proposed Riedel-shear-like structures indicate a slight shortening and compression of the mare basin lithosphere during movements along lava-covered zones of weakness.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00897105
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Mapping previously unmapped planetary surface: A supervised multispectral terrestrial/aquatic approach in northeastern Finland (1984)
    Springer
    Earth, moon and planets 30 (1984), S. 295-311 
    Details
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Although large numbers of imageries over planetary surfaces have been aquired by notable space missions over the past twenty years, the versatile technical remote sensing achievements, which have found their long-term and successful applications within the fields of different geosciences, have not been employed in planetology. High resolution imageries allow small-scale surface features to be observed, various filters allow different wavelength bands and surface units of different colour or spectral reflectance to be recorded. Also long-term missions transmit information about multitemporal changes, but such diversified multitemporal surface mapping, as possible by Landsat MSS data, to say nothing of the potential of the Landsat TM and SPOT equipment, are mostly unexecuted. This paper contains an example of the aquatic environment research by computer-assited remote sensing using Landsat MSS data. The western parts of Lake Yli-Kitka, northeastern Finland were studied and mapped according to spectrally identified classes which were improved after field work by associated reclassification. The Landsat classification of open water areas depends on the water quality and depth, or shore distance relations. The recognition of aquatic vegetation complexes is based on the main life-form (helophytic, nymphaeid, isoetid etc.) and the amount of recorded radiation reflected from the chlorophyll (or from other shallow bottom coverage) in respect to the open water surface radiation absorbance within near infrared wavelengths. Aquatic areas are quite featureless in respect to their reflectance, especially in northeastern Finland area studied. The use of wide-channel multispectral satellite data has demonstrated to be valid under quite difficult circumstances. Similar or preferably more up-to-date planetary imagery data could be of high utility value in mapping various surface units of the terrestrial planets and large moons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00056206
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Developments in the evaluation of small lake water quality from digital Landsat MSS data, Kuusamo, Northeast Finland (1984)
    Springer
    Earth, moon and planets 31 (1984), S. 249-264 
    Details
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The water quality data collected on the ground by the Water District Office in Oulu was subjected to statistical analyses together with Landsat data to display a few interactions and the possibilities of exploiting remote sensing methods in water area surveying. Correlations between the Landsat data statistics and some water quality measurements were identified. The small size of the studied lakes does not allow any clear calibration to be made but there could be possibilities to develop remote sensing methods for the evaluation of environmental variables and the detection of productivity and the eutrophication stage. The remote sensing procedure could also be useful in portraying temporal variations within lakes as well as relative variations between lakes by classifying each lake on a pixel-by-pixel basis. Although the remote sensing method is not able to supersede ground truth information for lake studies, it has value in regions where many lakes are to be found within a restricted small area. Under these circumstances the collection of information on the ground for a small number of test lakes and the generalization of this data, with the aid of machine-pressing remote sensing, would result in considerably less field work and cost savings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00058904
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    A simple method for planetary surface ruggedness estimation (1983)
    Springer
    Earth, moon and planets 29 (1983), S. 7-13 
    Details
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The method for mapping the pixel-scale and larger ruggednesses of the Martian ridged plains within Solis Planum is described by assuming the Lommel-Seeliger's reflection law. This method allows surface tilt angles towards and away from the Sun to be estimated and topographic elevations to be displayed by the aid of monoscopic digital image data. The restrictions of this method are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00928372
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Terra scarps indicating youngest terra faults on the moon (1984)
    Springer
    Earth, moon and planets 31 (1984), S. 63-74 
    Details
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Lunar crustal shortening does not seem to be restricted to the lava-filled basins alone; but there are some young scarp-like terra ridges in places around mare areas where they often continue other tectonic structures. This crustal shortening has not reached the same intensity as in the case of the lobate scarp overthrusts on Mercury. Young lunar terra ridges indicate that crustal shortening with an areal extent also took place slightly around mare basins. Thus they link tensional rille tectonics with compressional mare ridge tectonics and indicate that areal heating/bending/extension — cooling/ shortening/compression may describe an important explaining factor in lunar mare- and near-mare tectonics in addition to the volcanic extrusions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00058112
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    A Landsat-assisted study of the aquatic areas of the Lake Kemijärvi region, Northern Finland (1984)
    Springer
    Earth, moon and planets 31 (1984), S. 183-216 
    Details
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Landsat MSS imagery is employed to assess the aquatic complexes of the regulated Lake Kemijärvi and the adjoining small natural lakes in Northern Finland. Ground data were collected from within the hydrolittoral areas to allow the evaluation and revision of the computer-aided Landsat MSS classification. The major developments reported here are: (1) the utilization of the computer-aided technique for surveying natural and regulated aquatic areas, (2) the recognition of different aquatic units and complexes defined by depth relations, bottom quality, vegetation coverage or flooding stage, and (3) the presentation of the lower limit of satellite data applicability for mapping small-sized and complicated areas. Although the low spectral and ground resolution levels place restrictions on the use of computeraided Landsat MSS data remote sensing for the parametric mapping of all aquatic phenomena, such data are still of value under circumstances in which ground data collected from a small number of reference areas can be extrapolated to apply to the surrounding lakes and aquatic areas within a single MSS frame. Studies of this kind also facilitate the multitemporal inspection of changing regulated lake environments, due to the long-term nature of the Landsat project.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00055529
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Lunar ‘en echelon within en echelon’ structures (1981)
    Springer
    Earth, moon and planets 25 (1981), S. 105-112 
    Details
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Some en echelon structures, tension gashes and compressional ridges may form similar patterns. The N-S compression activates diagonal conjugate zones of weakness with tension gashes in the vicinity of the compressional direction. In the case of E-W compression similar arrangements of en echelon compression ridges are generated. The global N-S compression existing at the time of fracturing of the lava-flooded Oceanus Procellarum basin is arguable. It is possible to interpret some different scale mare ridge arrangements as ‘en echelon within en echelon’ structures. Major ridge ranges evidently have Riedel and opposite Riedel orientations and they consist of minor en echelon structures which may in places be intruded tension gashes but are evidently mostly sheared and compressed Riedel fractures. The ‘en echelon withinen echelon’ structures of mare ridges manifest the significance of different scale strike-slip movements along the lithosphere zones of weakness indicated by present mare ridge zones. The orientation of these Riedel-fracture-like en echelon structures also points to the existence of an areal compression during shearings along the zones of weakness. The Oceanus Procellarum basin sinking caused by lava loadings and lunar internal cooling led to the lithosphere shortening and to compressional circumstances. The angle between proposed Riedel structures and the mare ridge zones varies within this area, possibly indicating differences in compression and shearing in distinct parts of the shortened basin lithosphere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00911811
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    A note on computer-aided planetary remote sensing (1984)
    Springer
    Earth, moon and planets 30 (1984), S. 205-207 
    Details
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract An example is presented to assist remote sensing scientists in their orientation towards the digital analysis of planetary image data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00114313
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    Paper (German National Licenses)
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