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  • Data  (4)
  • 51-417A; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg51; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; North Atlantic/CONT RISE  (2)
  • acceleration  (2)
  • 1980-1984  (4)
Collection
  • Data  (4)
Source
Keywords
Publisher
Years
  • 1980-1984  (4)
Year
  • 1
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    Unknown
    Analysis of Mn-rich basalt from Leg 51 (1980)
    PANGAEA
    In:  Supplement to: Humphris, Susan E; Thompson, Robert N; Marriner, Giselle F (1980): The mineralogy and geochemistry of basalt weathering, holes 417A and 418A. In: Donnelly, T.; Francheteau, J.; Bryan, W.; Robinson, P.; Flower, M.; Salisbury, M.; et al., Initial Reports of the Deep Sea Drilling Project, U.S. Government Printing Office, LI, LII, LIII, 1201-1217, https://doi.org/10.2973/dsdp.proc.515253.147.1980
    Details
    Publication Date: 2023-08-28
    Description: The successful drilling on Legs 51, 52, and 53 created a rare opportunity to investigate the long-term effects of seawater-rock interactions on the mineralogy and chemistry of basalts erupted on the sea floor. The purpose of this paper is to describe the weathering of the basalts in terms of the changes in their mineralogy and chemistry, and to compare the weathering observed in Hole 418A with that in the upper parts of Hole 417A.
    Keywords: 51-417A; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg51; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; North Atlantic/CONT RISE
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
    facet.materialart.
    Unknown
    Analysis of Mn-nodules from Leg 51 (1980)
    PANGAEA
    In:  Supplement to: Borella, Peter E; Adelseck, C (1980): Manganese Micronodules in Sediments: A Subsurface In-Situ Origin, Leg 51, Deep Sea Drilling Project. In: Donnelly, T.; Francheteau, J.; Bryan, W.; Robinson, P.; Flower, M.; Salisbury, M.; et al., Initial Reports of the Deep Sea Drilling Project, U.S. Government Printing Office, LI, LII, LIII, 771-787, https://doi.org/10.2973/dsdp.proc.515253.113.1980
    Details
    Publication Date: 2023-08-28
    Description: Rhodochrosite crystals and manganese oxide micronodules which have formed in situ are found in abundance at depth (76.5 to 106.5 m) in Hole 417A. A gradual transformation of the rhodochrosite to manganese oxide micronodules is observed in many grains throughout the interval. The transformation process initially attacks the edge of the rhodochrosite crystal and proceeds inward, first forming a pseudomorph of the crystal. Some grains exhibit varying degrees of departure from the crystal shape of a true pseudomorph, suggesting either an overgrowth of manganese oxide or late-stage destruction of the pseudomorph. No significant differences were observed in the relative per cent of minor and trace metals when comparing the pure rhodochrosite with the manganese oxide pseudomorphs. This suggests that the manganese and other trace elements were not transported into the system but were incorporated directly from the rhodochrosite as the manganese oxide formed. Grains which did not exhibit pseudomorphic form showed enrichment in some trace elements. We postulate that the diagenetic environment changed from reducing to oxidizing. How and when this change occurred in the sedimentary column remains an enigma.
    Keywords: 51-417A; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg51; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; North Atlantic/CONT RISE
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 3
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    Unknown
    Northern Finland Seismological Network (1980)
    GFZ Data Services
    Details
    Publication Date: 2023-05-12
    Description: Abstract
    Description: Sodankylä geophysical observatory (SGO) has operated in Sodankylä in northern Finland since 1913. SGO was originally founded by the Finnish Academy of Science and Letters. Now it takes care of national and international duties studying the space and geoenvironment as an independent research organisation in the University of Oulu. SGO performs long-term measurements, builds instruments, innovates and maintains domestic and international measurements, and performs research from these measurements. The seismic observations at SGO started in Sodankylä 1956. In 2005-2006 SGO seismic stations were updated to broadband instrumentation and connected to GEOFON data center. Today, the number of seismic stations has increased to 9. The stations have Streckeisen STS-2 or Nanometrics Trillium PA/PH broadband sensors. 3 of the stations are so called Posthole stations located in borehole 7-20 m below surface. The rest of the stations are located on the surface or in a more traditional type of vault. Data acquisition systems are either Earth Data PS6-24 digitisers and PC with Seiscomp or Nanometrics Centaurs. The continuous wave form data is collected at 100 Hz sampling frequency. The VH, LH and BH channel data is available from GEOFON data center and the 100Hz HH data from SGO by request. Further information about instrumentation can be found at the Institute’s web site (https://www.sgo.fi/). Waveform data are available from the GEOFON data centre, under network code FN, and arefully open.
    Keywords: geophysics ; seismology ; seismic noise ; earthquakes ; induced ; seismic hazard ; broad band ; velocity ; acceleration ; displacement ; Broadband seismic waveforms ; Seismic monitoring ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 EARTHQUAKES ; In Situ/Laboratory Instruments 〉 Magnetic/Motion Sensors 〉 Seismometers ; In Situ Land-based Platforms 〉 GEOPHYSICAL STATIONS/NETWORKS ; In Situ Land-based Platforms 〉 GEOPHYSICAL STATIONS/NETWORKS 〉 SEISMOLOGICAL STATIONS
    Type: Dataset , Seismic Network
    Format: ~300G
    Format: .mseed
    Format: XML
    Location Call Number Expected Availability
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    DATA GFZ
  • 4
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    Unknown
    The Finnish National Seismic Network (1980)
    GFZ Data Services
    Details
    Publication Date: 2023-02-08
    Description: Abstract
    Description: The Institute of Seismology, University of Helsinki (ISUH) was founded in 1961 as a response to the growing public concern for environmental hazards caused by nuclear weapon testing. Since then ISUH has been responsible for seismic monitoring in Finland. The current mandate covers government regulator duties in seismic hazard mitigation and nuclear test ban treaty verification, observatory activities and operation of the Finnish National Seismic Network (FNSN) as well as research and teaching of seismology at the University of Helsinki.The first seismograph station of Finland was installed at the premises of the Department of Physics, University of Helsinki in 1924. However, the mechanical Mainka seismographs had low magnification and thus the recordings were of little practical value for the study of local seismicity. The first short-period seismographs were set up between 1956 and 1963. The next significant upgrade of FNSN occurred during the late 1970’s when digital tripartite arrays in southern and central Finland became fully operational, allowing for systematic use of instrumental detection, location and magnitude determination methods. By the end of the 1990’s, the entire network was operating using digital telemetric or dial-up methods. The FNSN has expanded significantly during the 21st Century. It comprises now 36 permanent stations. Most of the stations have Streckeisen STS-2, Nanometrics Trillium (Compact/P/PA/QA) or Guralp CMG-3T broad band sensors. Some Teledyne-Geotech S13/GS13 short period sensors are also in use. Data acquisition systems are a combination of Earth Data PS6-24 digitizers and PC with Seiscomp/Seedlink software or Nanometrics Centaurs. The stations are connected to the ISUH with Seedlink via Internet and provide continuous waveform data at 40 Hz (array) or 100-250 Hz sampling frequency. Further information about instrumentation can be found at the Institute’s web site (www.seismo.helsinki.fi). Waveform data are available from the GEOFON data centre, under network code HE, and arefully open.
    Keywords: geophysics ; seismology ; seismic noise ; earthquakes ; induced ; seismic hazard ; broad band ; velocity ; acceleration ; displacement ; Monitoring system ; Seismological stations ; In Situ/Laboratory Instruments 〉 Magnetic/Motion Sensors 〉 Seismometers ; In Situ Land-based Platforms 〉 GEOPHYSICAL STATIONS/NETWORKS
    Type: Dataset , Seismic Network
    Format: ~300G
    Format: .mseed
    Format: XML
    Location Call Number Expected Availability
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    DATA GFZ
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