... Anderen Theilen Des Silurischen Gebietes Nördlich Vom See Siljan Bekannt Sind, Erklärung Der Tafel.
1882 - Gale Group | NCCO-STM 1of2
W. U. Reimold, S. P. Kelley, Sarah C. Sherlock, Herbert Henkel, Christian Koeberl,
... In earlier studies, the 65-75 km diameter Siljan impact structure in Sweden has been linked to the Late Devonian mass extinction event. The Siljan impact event has previously been dated by K- ... which is within error limits of this earlier Siljan age. Here we report new Ar-Ar ages ... heating techniques for several melt breccia samples from Siljan (interpreted to be impact melt breccia). The analytical ... s̀). Our conservative estimate for the age of Siljan is 377 ± 2 Ma (95% confidence limits), which ... F) boundary and the previously quoted age of Siljan. However, the age of the F/F boundary ...
Tópico(s): Geology and Paleoclimatology Research
2005 - Wiley | Meteoritics and Planetary Science
Leif-Erik Pedersen, Larry M. Heaman, Paul Martin Holm,
... zircon and baddeleyite in plutonic rocks from the Siljan-Skrim area in the Vestfold Graben Segment in ... late magmatic volatile phase in fluid inclusions. The Siljan-Skrim area comprises two intrusive complexes. The northern ... Skrim larvikite and the Mykle ekerite. The southern Siljan-Hvarnes complex consists of a series of monzonitic ... three samples from the northern part of the Siljan-Skrim area and from 278.5 ± 0.8 ... in the northern and southern parts of the Siljan-Skrim area and suggests that emplacement of magmas ...
Tópico(s): Geochemistry and Geologic Mapping
1995 - Elsevier BV | Lithos
Sanna Holm, C. Alwmark, Walter Álvarez, Birger Schmitz,
Abstract– The Siljan impact structure in Sweden is the largest confirmed impact structure in Western Europe. Despite this, the structure has ... in quartz grains from 73 sampled localities at Siljan. At 21 localities from an area approximately 20 ... on the distribution pattern of shocked quartz at Siljan, the original transient cavity can be estimated at ... the original rim to rim diameter of the Siljan crater was somewhere in the size range 50– ...
Tópico(s): High-pressure geophysics and materials
2011 - Wiley | Meteoritics and Planetary Science
Sanna Holm‐Alwmark, Auriol S. P. Rae, L. Ferrière, C. Alwmark, G. S. Collins,
Abstract Siljan, central Sweden, is the largest known impact structure in Europe. It was formed at about 380 Ma, ... questions about the original size and morphology of Siljan remain unanswered. Here we present the results of ... 65 km. According to our simulations, the original Siljan impact structure would have been a peak‐ring crater. Siljan was formed in a mixed target of Paleozoic ...
Tópico(s): Methane Hydrates and Related Phenomena
2017 - Wiley | Meteoritics and Planetary Science
The Siljan Ring impact structure in Sweden is the scene of current deep-drilling exploration for methane trapped in ... well and eight natural gas seeps from the Siljan Ring and other localities in Sweden have also ... of helium and the “crustal” isotope ratio for Siljan granite fluids. Isotope ratios in the gas seeps ...
Tópico(s): Geology and Paleoclimatology Research
1989 - Elsevier BV | Geochimica et Cosmochimica Acta
Stephen C. Komor, John W. Valley, Philip E. Brown,
... Fluid-inclusion evidence for impact heating at the Siljan Ring, Sweden Stephen C. Komor; Stephen C. Komor ... Fluid-inclusion evidence for impact heating at the Siljan Ring, Sweden. Geology 1988;; 16 (8): 711–715. ... All ContentBy SocietyGeology Search Advanced Search Abstract The Siljan Ring in central Sweden is a Devonian impact ...
Tópico(s): Landslides and related hazards
1988 - Geological Society of America | Geology
Based on biostratigraphic investigations in the eastern Siljan district, central Sweden, and combined with earlier studies at Hunneberg, south-central Sweden, it is shown that the early post-Tremadoc-age Paroistodus ... the reference section at Sjurberg in the eastern Siljan district. Correlations between these two areas, as well ... overlying the P. proteus Zone in the eastern Siljan district, the Prioniodus elegans Zone and the Oepikodus ...
Tópico(s): Geological Studies and Exploration
1994 - Cambridge University Press | Journal of Paleontology
Anette Högström, Erik Sturkell, Jan Ove R. Ebbestad, Maurits Lindström, Jens Ormö,
Abstract The Ordovician age Lockne and Devonian Siljan craters are two of the largest impact structures in northern Europe. Both formed in targets with a thick, low-strength upper layer. This ... resistant substrate. The concentric craters of Lockne and Siljan are excellent models for studies of similar concentric ... shear zones that cut the basement. In the Siljan area the development of mega block associations comprising ...
Tópico(s): Methane Hydrates and Related Phenomena
2010 - Taylor & Francis | GFF
Oliver Lehnert, Guido Meinhold, Stig M. Bergström, Mikael Calner, Jan Ove R. Ebbestad, Sven Egenhoff, Åsa M. Frisk, Judith L. Hannah, Anette Högström, Warren D. Huff, Christopher Juhlin, Jörg Maletz, Holly J. Stein, Erik Sturkell, Thijs R.A. Vandenbroucke,
... impact structure in Europe, the relict of the Siljan meteorite crater, provide new possibilities to reconstruct Early ... other significantly different facies are preserved in the Siljan district. An erosional unconformity representing a substantial hiatus ... shale succession in the western part of the Siljan structure and suggests an extended period of uplift ...
Tópico(s): Astro and Planetary Science
2012 - Taylor & Francis | GFF
Manzur Ahmed, Oliver Lehnert, David Fuentes, Guido Meinhold,
... the Middle Ordovician (Darriwilian) limestone formations in the Siljan Crater, Sweden indicates their generation primarily from peak ... rich source rocks. It is inferred that the Siljan Crater seep oil and solid bitumens were generated ... units are consistent with the biogenic origin of Siljan Crater petroleum. Although these seep oil and solid ...
Tópico(s): Atmospheric and Environmental Gas Dynamics
2014 - Elsevier BV | Organic Geochemistry
Arzu Arslan, Guido Meinhold, Oliver Lehnert,
... in 2011 in the southern part of the Siljan Ring, represents a structurally complex section and provides ... impact-induced local structure in central Sweden. The Siljan Ring was formed around the central uplift of ... natural gas and geothermal energy reservoirs in the Siljan impact structure.
Tópico(s): Geology and Paleoclimatology Research
2013 - Taylor & Francis | GFF
W. U. Reimold, Luise Fischer, Jan Müller, T. Kenkmann, Ralf‐Thomas Schmitt, Uwe Altenberger, A. Kowitz,
... the exposed central uplift of the 380 Ma Siljan impact structure. The host rock to the PTBs ... core from Hättberg, near the centre of the Siljan central uplift, contains numerous veins and pods of ...
Tópico(s): Geological and Geochemical Analysis
2015 - Taylor & Francis | GFF
Valdar Jaanusson, Harry Mutvei,
... the summer of 1947 at Vikarbyn in the Siljan area. The Estonian-Ingrian stratigraphic division of the ... öland, may largely be distinguished also in the Siljan area. The Lepidurus beds, however, seem to be ...
Tópico(s): Geological Studies and Exploration
1951 - Taylor & Francis | Geologiska Foereningan i Stockholm Foerhandlingar
... richer waters within each district, except in the Siljan area of limestone, where the lowest median occurs. ... shallower lakes. (8) P is lowest in the Siljan limestone lakes, and highest in the Dalarna seepage ... richer waters within each district (except in the Siljan area). (10) Sr, which like the major constituents ...
Tópico(s): Renal function and acid-base balance
1955 - Elsevier BV | Geochimica et Cosmochimica Acta
... Jonstorp Formation and the Dalmanitina beds of the Siljan district, Östergötland, and Kinnekulle are termed Nittsjö Formation, ... is summarized which indicates that south of the Siljan district and of Gotska Sandön beds corresponding to ... and marls and can be followed from the Siljan district via Östergötland to the bottom of Baltic ...
Tópico(s): Geological and Geophysical Studies
1963 - Taylor & Francis | Geologiska Foereningan i Stockholm Foerhandlingar
... km north of the topographical center of the Siljan structure. Its coordinates are 61°5′ and 14° ... suitable localities for shatter cone measurements within the Siljan structure are discussed. It is suggested that excavations ...
Tópico(s): Seismology and Earthquake Studies
1980 - Taylor & Francis | Geologiska Foereningan i Stockholm Foerhandlingar
... is located in the eastern part of the Siljan impact structure in central Sweden. It consists of ... Devonian meteorite impact considered to have created the Siljan Ring structure. A geochemical profile through the ore- ...
Tópico(s): Geology and Paleoclimatology Research
1984 - Taylor & Francis | Geologiska Foereningan i Stockholm Foerhandlingar
... described from the pre-Ashgill successions of the Siljan district, Dalarna, central Sweden. Eight species representing three ... Micragnostus toernquisti. The occurrence of Micragnostus in the Siljan district indicates that its early Ordovician geographical distribution ...
Tópico(s): Paleontology and Stratigraphy of Fossils
1990 - Taylor & Francis | Geologiska Foereningan i Stockholm Foerhandlingar
Göran Åberg, B. Collini, Birger Schmitz,
... analyses of pseudotachylite melt samples from within the Siljan structure yield an average age of 345 Ma, ... dolerite dikes outside the impact area. Key Words: Siljan Ring. Gravbergdeep wellradiometric ageK-Armeteorite impact
Tópico(s): Isotope Analysis in Ecology
1989 - Taylor & Francis | Geologiska Foereningan i Stockholm Foerhandlingar
Ping Zhang, Thorkild M. Rasmussen, Laust B. Pedersen,
... section of the electric conductivity structure in the Siljan impact area, located in the central part of ... results and support an impact origin of the Siljan area. Fluid migration through the fractures generated by ...
Tópico(s): Geophysical Methods and Applications
1988 - American Geophysical Union | Journal of Geophysical Research Atmospheres
Christopher Juhlin, Laust B. Pedersen,
Abstract Recently acquired seismic reflection data over the Siljan Ring structure support previous estimates of the dimensions ... data strongly support an impact origin for the Siljan Ring structure and indicate that the crust below ...
Tópico(s): Geological and Geochemical Analysis
1993 - Taylor & Francis | Geologiska Foereningan i Stockholm Foerhandlingar
Jan Ove R. Ebbestad, Anette Högström, Åsa M. Frisk, Tõnu Martma, Dimitri Kaljo, Björn Kröger, Helje Pärnaste,
... terminal Ordovician (Pirgu and Porkuni stages) of the Siljan district, Sweden, allows a more precise correlation of ... late Katian (Pirgu) age of Holorhynchus in the Siljan district is clear and its co-occurrence with ...
Tópico(s): Marine Biology and Ecology Research
2014 - Taylor & Francis | GFF
M. Calner, Michael M. Joachimski, Oliver Lehnert, Guido Meinhold, R Wu,
... C data from two drillcores recovered from the Siljan district, we present a first continuous carbon isotope ... 001 core from the western part of the Siljan impact structure ranges through the Lower-Middle Ordovician, ...
Tópico(s): Geological and Geochemical Analysis
2014 - Estonian Academy Publishers | Proceedings of the Estonian Academy of Sciences Geology
Harbe Muhamad, Christopher Juhlin, Oliver Lehnert, Guido Meinhold, M. Andersson, María de los Ángeles García Juanatey, Alireza Malehmir,
The Siljan impact structure is the largest known impact structure in Europe, the result of a Late Devonian meteorite ... were acquired in the western part of the Siljan impact structure to determine some of the physical ...
Tópico(s): earthquake and tectonic studies
2015 - Elsevier BV | Journal of Applied Geophysics
... out in the two deep boreholes in the Siljan Ring area of the Baltic Shield. The Gravberg- ... 6779 m true vertical depth (TVD) in the Siljan region, central Sweden, and the Stenberg-1 borehole, ... indicate a strike-slip faulting regime in the Siljan area and that the state of stress is ...
Tópico(s): Rock Mechanics and Modeling
1999 - Elsevier BV | International Journal of Rock Mechanics and Mining Sciences
... the Svecofennian Domain. Three types of granitoids (Järna, Siljan and Garberg) can be distinguished within the Dala ... 79 Ga. The 1.70–1.68 Ga Siljan and Garberg granites are more evolved and were ... the 1.70–1.68 Ga high-level Siljan and Garberg granites and their closely associated volcanic ...
Tópico(s): Geochemistry and Geologic Mapping
1999 - Elsevier BV | Precambrian Research
... old, small mines situated outside, but near the Siljan Ring structure and possibly both are influenced by ... may be explained as a result of the Siljan impact about 360 Ma ago. Wickman, F.E., 1994: The Siljan Ring impact structure: possible connections with minor ores ...
Tópico(s): Geology and Paleoclimatology Research
1994 - Taylor & Francis | GFF
Harbe Muhamad, Christopher Juhlin, Alireza Malehmir, Daniel Sopher,
The Siljan Ring impact structure is the largest known impact structure in Europe and is Late Devonian in age. ... is surrounded by a ring-shaped depression. The Siljan area is one of the few areas in ... we focus on the northwestern part of the Siljan Ring, close to the town of Orsa, with ... magnitude and style from other parts of the Siljan Ring.
Tópico(s): Planetary Science and Exploration
2017 - Elsevier BV | Journal of Applied Geophysics
(1967). Vacation House Settlement in the Siljan Region. Geografiska Annaler: Series B, Human Geography: Vol. 49, No. 2, pp. 69-95.
Tópico(s): Regional Development and Management Studies
1967 - Taylor & Francis | Geografiska Annaler Series B Human Geography