👁 Image
| French, Bevan M., Koeberl, Christian, Gilmour, Iain, Shirey, Steven B., Dons, Johannes A., Naterstad, Johan (1997) The Gardnos impact structure, Norway: Petrology and geochemistry of target rocks and impactites. Geochimica et Cosmochimica Acta, 61 (4) 873-904 doi:10.1016/s0016-7037(96)00382-1 | Journal (article/letter/editorial) | | OO
PI1 SOO16-7037(96)00382-l
The Gardnos
impact structure, Norway: Petrology and geochemistry
of target...Museum, University of Oslo, Sarsgt. 1, N-0562 Oslo, Norway
(Received July 11, 1996; accepted in revised fom...fom
November 5, 1996)
Abstract-The
Gardnos structure, Norway is an approximately
circular area of anomalously...The original recognition of Gardnos as a deeply
eroded impact structure between 900 and 400 Ma old has...shocked rocks
(impactites).
Deep erosion of the structure has erased the original rim, removed much of the | 👁 Image
| | Journal (article/letter/editorial) | | zircon and titanite from the Gardnos
impact structure, Norway: Evidence for impact at 546 Ma?
E. Kalleson a...University of Oslo, Norway
Department of Geosciences, University of Oslo, Norway
Received 20 October...titanite were investigated in impactites of the Gardnos structure, a crater formed in Sveconorwegian (ca. 1...likely the incorporation of organic carbon during impact causing black staining of
the zircon grains. The...mass spectrometry (ID-TIMS). Zircon grains without impact related features
have U–Pb data showing moderate | 👁 Image
| Goderis, Steven, Kalleson, Elin, Tagle, Roald, Dypvik, Henning, Schmitt, Ralf-Thomas, Erzinger, Jörg, Claeys, Philippe (2009) A non-magmatic iron projectile for the Gardnos impact event. Chemical Geology, 258 (3) 145-156 doi:10.1016/j.chemgeo.2008.09.025 | Journal (article/letter/editorial) | | e o
A non-magmatic iron projectile for the Gardnos impact event
Steven Goderis a,b, Elin Kalleson c,...N-0316 Oslo, Norway
d
Department of Geosciences, University of Oslo, N-0316 Oslo, Norway
e
Department...September 2008
Editor: B. Bourdon
Keywords:
Gardnos
Impact structure
Platinum group elements
Projectile identification...Precambrian
Gardnos impact structure in Norway. Fifteen impactite samples, predominantly impact breccias...from the central and northeastern part of the structure, were analyzed for platinum group elements (PGE) | 👁 Image
| | Journal (article/letter/editorial) | | impactites (suevite and impact melt rock) within the
Gardnos structure, Norway
Elin KALLESON1,2*, Henning...Oslo, Norway
2
Natural History Museum, University of Oslo, P.O. 1172 Blindern, NO-0318 Oslo, Norway
*
Corresponding...of clastrich impact melt rock, are found within the central part of the Gardnos structure. They are
preserved...eroded remnants in the relatively small complex impact structure with a
present diameter of 5 km. These rocks...subjected to during the impact event and
deposition processes. This study discusses the impact-related deposits | 👁 Image
| Gilmour, I, French, B.M, Franchi, I.A, Abbott, J.I, Hough, R.M, Newton, J, Koeberl, C (2003) Geochemistry of carbonaceous impactites from the Gardnos impact structure, Norway. Geochimica et Cosmochimica Acta, 67 (20) 3889-3903 doi:10.1016/s0016-7037(03)00213-8 | Journal (article/letter/editorial) | | of carbonaceous impactites from the Gardnos impact structure, Norway
I. GILMOUR,1,* B. M. FRENCH,2 I. A...Abstract—The Gardnos impact structure in southern Norway is one of only two known impact structures
(among...investigation of the geochemistry and petrology of Gardnos impactites (French et al., 1997) with additional...components have been identified in Gardnos impactites: (1) impact-produced
diamonds, 0.5 to 1 m in size...size, with a cubic crystal structure, predominantly hexagonal morphologies with
platey layers and an | 👁 Image
| | Journal (article/letter/editorial) | | Minerals of Norway - the (almost) complete
inventory
Gunnar Raade
Preamble
A monographic survey of the...the minerals of Norway (Norges Mineraler) was published by
Neumann (1985), covering all minerals recorded...and synonyms. A large number of
minerals new to Norway have been recorded since the book appeared. The...attempt to list all accepted mineral species from Norway, including those from
Neumann (1985) and later...& Nickel
2001). Names of minerals discovered in Norway after the edition of Neumann's monograph
are in | 👁 Image
| RIIS, F., KALLESON, E., DYPVIK, H., KRØGLI, S. O., NILSEN, O. (2011) The Ritland impact structure, southwestern Norway. Meteoritics & Planetary Science, 46 (5) 748-761 doi:10.1111/j.1945-5100.2011.01188.x | Journal (article/letter/editorial) | | 1945-5100.2011.01188.x
The Ritland impact structure, southwestern Norway
F. RIIS1, E. KALLESON2*, H. DYPVIK2...Petroleum Directorate, P.O. Box 600, NO-4003 Stavanger, Norway
Department of Geosciences, University of Oslo,...Oslo, Norway
3
The Norwegian Forest and Landscape Institute, P.O. Box 115, NO-1431 Ås, Norway
*
Corresponding...Ritland structure is a newly discovered impact structure, which is located in
southwestern Norway. The structure...structure is the remnant of a simple crater 2.5 km in diameter and
350 m deep, which was excavated in | 👁 Image
| | Journal (article/letter/editorial) | | Frontiers
An appraisal of the ages of terrestrial impact structures
F. Jourdan a,⁎, P.R. Renne b,c, W.U...online 30 July 2009
Editor: A.W. Hofmann
Keywords:
impact
crater
absolute chronology
isotopic dating
40
Ar/39Ar...database
a b s t r a c t
There are 174 confirmed impact structures known on Earth (e.g., http://www.unb...ca/passc/ImpactDatabase/;
late 2008) but a far smaller number of impact structures has yielded a well-constrained age....through geological time and evaluation of
potential impact periodicity, (3) calibrating the absolute chronostratigraphic | 👁 Image
| Schmieder, Martin, Shaulis, Barry J., Lapen, Thomas J., Buchner, Elmar, Kring, David A. (2019) In situ U–Pb analysis of shocked zircon from the Charlevoix impact structure, Québec, Canada. Meteoritics & Planetary Science, 54 (8) 1808-1827 doi:10.1111/maps.13315 | Journal (article/letter/editorial) | | analysis of shocked zircon from the Charlevoix impact structure,
Quebec, Canada
Martin SCHMIEDER
1,2*
...a vesicular-fluidal impact melt rock from
the ≥54 km Charlevoix impact structure, Quebec, Canada, suggests...Ordovician to
Silurian age of 450 20 Ma for the impact. This age is anchored by concordant U–Pb
results...seemingly chronometrically reset by the Charlevoix impact, but withstood later
tectonometamorphic events...Ma and corroborates
earlier suggestions that the impact occurred most likely in the Ordovician, and not | 👁 Image
| Li, Shan-Shan, Keerthy, S., Santosh, M., Singh, S.P., Deering, C.D., Satyanarayanan, M., Praveen, M.N., Aneeshkumar, V., Indu, G.K., Anilkumar, Y., Sajinkumar, K.S. (2018) Reply to the ‘Comment on Anatomy of impactites and shocked zircon grains from Dhala reveals Paleoproterozoic meteorite impact in the Archean basement rocks of Central India’ by Pati et al., 2018, Gondwana Research. Gondwana Research, 60. 218-221 doi:10.1016/j.gr.2018.03.018 | Journal (article/letter/editorial) | | grains from Dhala reveals Paleoproterozoic meteorite
impact in the Archean basement rocks of Central India’...grains
from Dhala reveals Paleoproterozoic meteorite impact in the Archean basement rocks of
Central India’...grains from
Dhala reveals Paleoproterozoic meteorite impact in the Archean basement rocks
of Central India’...grains from Dhala reveals Paleoproterozoic meteorite
impact in the Archean basement rocks of Central India’...their REE redistribution.
US
(2018) including impact-related K2O metasomatism and impacted zircon grains | 👁 Image
| | Journal (article/letter/editorial) | | Chemical compositions of impact melt breccias and target rocks
from the Tenoumer impact crater, Mauritania...revision accepted 05 August 2005)
Abstract–The impact melt breccias from the Tenoumer crater (consisting...target rock clasts.
Analyses of major elements in impact melt rocks show lower contents of SiO2, Al2O3,...basement. In comparison with the bulk analyses of the impact melt, the glass is strongly enriched in
Si-Al,...it is depleted both in Mg and Fe; moreover, the impact melt rocks are variably
enriched or depleted in | 👁 Image
| | Journal (article/letter/editorial) | | The search for fullerenes in rocks from the Ries impact crater
Ota FRANK1*, Jan JEHLI»KA1, VÏra HAMPLOV¡2...Sudbury crater and the K-T
and P-T boundaries. Impact rocks of the Ries crater, Germany, including samples...One involves the
formation of fullerenes during impact, the other proposes
their extraterrestrial origin...origin. We searched for fullerenes in the
Ries impact structure, where the target rocks are carbon-rich
and...carbon of fullerenes,
had they formed during the impact. Impact diamonds were
first reported from this crater | 👁 Image
| | Journal (article/letter/editorial) | | http://meteoritics.org
Impact melt rocks from the Paasselkä impact structure (SE Finland):
Petrography...rocks from the ∼10 km and ≤1.9 Ga Paasselkä
impact structure, SE Finland, were obtained. In this study...geochemical description of clast-rich Paasselkä impact melt rocks. Shock metamorphic features
comprise...altered. The geochemical
composition of the Paasselkä impact melt rocks is roughly consistent with the compositions...compositions of melt
rocks from a number of impact structures located within the crystalline basement of | 👁 Image
| Schmieder, M., Tohver, E., Jourdan, F., Denyszyn, S.W., Haines, P.W. (2015) Zircons from the Acraman impact melt rock (South Australia): Shock metamorphism, U–Pb and 40 Ar/ 39 Ar systematics, and implications for the isotopic dating of impact events. Geochimica et Cosmochimica Acta, 161. 71-100 doi:10.1016/j.gca.2015.04.021 | Journal (article/letter/editorial) | | elsevier.com/locate/gca
Zircons from the Acraman impact melt rock (South Australia):
Shock metamorphism...systematics,
and implications for the isotopic dating of impact events
M. Schmieder a,b,⇑, E. Tohver a, F. Jourdan...grains separated from the most likely autochthonous impact melt rock in the central domain of the large, 40–...40–
90 km eroded Ediacaran Acraman impact structure in South Australia. Microtextural characteristics...ZrO2 (probably baddeleyite) that pseudomorph pre-impact zircon. The granular zircons correspond to the | 👁 Image
| PUURA, V., HUBER, H., KIRS, J., KÄRKI, A., SUUROJA, K., KIRSIMÄE, K., KIVISILLA, J., KLEESMENT, A., KONSA, M., PREEDEN, U., SUUROJA, S., KOEBERL, C. (2004) Geology, petrography, shock petrography, and geochemistry of impactites and target rocks from the Kärdla crater, Estonia. Meteoritics & Planetary Science, 39 (3) 425-451 doi:10.1111/j.1945-5100.2004.tb00103.x | Journal (article/letter/editorial) | | Abstract–The Kärdla crater is a 4 km-wide impact structure of Late Ordovician age located on
Hiiumaa...to be the result of early stage alteration in an
impact-induced hydrothermal system. The chemical composition...INTRODUCTION
In the Baltic Sea region, 15 meteorite impact structures of
Paleozoic age have been identified...depending on high or low sea levels. Among
these 15 impact craters (see Fig. 1), six structures of Middle...bestpreserved crater among the Paleozoic marine impact
structures in this region. The Kärdla crater formed | 👁 Image
| | Journal (article/letter/editorial) | | Crustal contaminants in the Permian Oslo Rift, South Norway:
constraints from Precambrian geochemistry
Tom... UniÕersity of Oslo, Sars Gate 1, N-0562 Oslo, Norway
Abstract
During the late Paleozoic Oslo rifting...et al., 1997a,b..
The Precambrian crust of South Norway may be
divided into several sectors separated by...belt extending from southernmost Sweden to central Norway ŽTransscandinavian Igenous Belt, TIB.. The
southwestern...and by rift-related
Fig. 1. Simplified map of SE Norway, showing the position of the
Oslo Rift with respect | 👁 Image
| | Journal (article/letter/editorial) | | November 2012)
Abstract–Lockne is a concentric impact structure due to a layered target where weak
sediments...breccia is significantly different from the direct impact breccia and the
resurge deposit, we propose a separate...sedimentology of the Tramsta Breccia. The obliquity of
impact combined with the layered target caused an asymmetric...surrounding the
direct area of impact (e.g., Chesapeake Bay impact
structure), or by a shallow excavation...well-preserved and
well-documented marine-target impact structure in
central Sweden (e.g., Lindstr€
om et al | 👁 Image
| Tillberg, Mikael, Ivarsson, Magnus, Drake, Henrik, Whitehouse, Martin J., Kooijman, Ellen, Schmitt, Melanie (2019) Re-Evaluating the Age of Deep Biosphere Fossils in the Lockne Impact Structure. Geosciences, 9 (5) 202 doi:10.3390/geosciences9050202 | Journal (article/letter/editorial) | | Age of Deep Biosphere Fossils in
the Lockne Impact Structure
Mikael Tillberg 1,2, *, Magnus Ivarsson 3...Published: 7 May 2019
Abstract: Impact-generated hydrothermal systems have been suggested...possibly beyond. Fossil evidence from a handful
of impact craters worldwide have been used to support this...place
at least 100 Myr after the impact event, thus long after the impact-induced hydrothermal activity...are not, as previously
thought, related to the impact event, but nevertheless have colonized fractures | 👁 Image
| | Journal (article/letter/editorial) | | augite-plagioclase wedges in basement dolerites of Lockne impact
structure, Sweden: A new shock wave-induced deformation...augite-plagioclase wedges in basement
dolerites of Lockne impact structure, Sweden. The combined microscopic and spectroscopic...out of 18 studied, are distributed in the impact structure
within a radius of up to 10 km from the crater...doleritic in situ
basement rocks of the Lockne impact structure,
Sweden. The study uses microscopic and spectroscopic...wedges.
METHODOLOGY
Fig. 1. Map of the Lockne impact structure showing lithology
and location of samples | 👁 Image
| | Journal (article/letter/editorial) | | Whitehouse
J. Vestin
Detrital zircon ages from southern Norway ±
implications for the Proterozoic evolution
of...metasediments
from the high-grade Bamble Sector, southern Norway,
gives the ®rst information on the timing of discrete...no record of rocks older than 1.6 Ga in southern
Norway. The analysed metasediments are from a sequence...Mineralogical-Geological Museum, Sars Gate 1,
N-0562 Oslo, Norway
Fax: +47 22 85 18 00 e-mail: t.l.knudsen@toyen...high-grade
metasediments of the Bamble Sector, southern Norway. a, b
Oscillatory zoned, magmatic zircons which | 👁 Image
| | Report (article/chapter) | | verification of an extraterrestrial component in impact-derived melt rocks or
breccias can be of diagnostic...provide confirming evidence for an impact origin of a
geological structure. Geochemical methods are used to...not be used as evidence against an impact origin of a crater
structure. The determination of such an extraterrestrial...presence of a meteoritic component in a number of impact melt rocks and
breccias. This method avoids the...meteoritic component has been established for about 41 impact structures (out
of about 150 known on Earth), which | 👁 Image
| | Journal (article/letter/editorial) | | feldspar recording low-barometry impact processes,
Tenoumer impact structure, Mauritania
Steven J. JARET1...accepted 16 April 2014)
Abstract–The Tenoumer impact structure is a small, well-preserved crater within Archean...amphibolite, gneiss, and granite of the Reguibat Shield, north-central
Mauritania. The structure is surrounded by...crystalline blocks
(granitic gneiss, granite, and amphibolite) and impact-melt rocks. Evidence of shock
metamorphism...within small bodies of polymict, glass-rich breccia.
Impact-related deformation features in oligoclase and | 👁 Image
| PATI, Jayanta K., REIMOLD, Wolf Uwe, KOEBERL, Christian, PATI, Puniti (2008) The Dhala structure, Bundelkhand craton, Central India-Eroded remnant of a large Paleoproterozoic impact structure. Meteoritics & Planetary Science, 43 (8) 1383-1398 doi:10.1111/j.1945-5100.2008.tb00704.x | Journal (article/letter/editorial) | | Dhala structure, Bundelkhand craton, Central India—Eroded remnant
of a large Paleoproterozoic impact structure...discovered Dhala structure, Madhya Pradesh State, India, is the eroded remnant
of an impact structure with an...part of the Archean Bundelkhand craton. The pre-impact country rocks are
predominantly granitoids of ∼2...post-impact sediments of the presumably >1.7 Ga Vindhyan Supergroup. Thus, the age
for this impact event...currently bracketed by these two sequences. The Dhala structure is
asymmetrically disposed with respect to a central | 👁 Image
| Kenkmann, T., Kiebach, F., Rosenau, M., Raschke, U., Pigowske, A., Mittelhaus, K., Eue, D. (2007) Coupled effects of impact and orogeny: Is the marine Lockne crater, Sweden, pristine?. Meteoritics & Planetary Science, 42 (11) 1995-2012 doi:10.1111/j.1945-5100.2007.tb00556.x | Journal (article/letter/editorial) | | online at http://meteoritics.org
Coupled effects of impact and orogeny:
Is the marine Lockne crater, Sweden...understanding of marine-impact cratering processes is partly inferred from the
geological structure of the Lockne...the western part of the crater, pre-impact, impact, and
post-impact rocks are incorporated in Caledonian...were better preserved.
The presence of the impact structure influenced orogenesis due to morphological...meteorite impact craters discovered on
Earth so far is relatively small (175; Earth Impact Database
2007) | 👁 Image
| | Book | | Atlas
of Terrestrial
Impact Craters
Encyclopedic Atlas of Terrestrial Impact Craters
Enrico Flamini...Coletta
Editors
Encyclopedic Atlas
of Terrestrial Impact Craters
123
Editors
Enrico Flamini
Italian Space...Cover illustration: Radar image of the Gosses Bluff impact crater central peak (Australia) acquired in spotlight...shape depends on the impactor kinetic energy, the structure of the
ground, and other parameters. They then... Contents
Part I
Chapters
Impacting Bodies and Post-impact Modification Processes on Earth . . . . . . . . |
|
