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NARROW
Format
Article Type
Journal
Publisher
Section
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Africa
-
Central Africa
-
Congo Democratic Republic (1)
-
-
Limpopo Belt (2)
-
Southern Africa
-
Barberton greenstone belt (1)
-
Botswana (4)
-
Kaapvaal Craton (23)
-
Namaqualand metamorphic complex (1)
-
Orange River (1)
-
South Africa
-
Bushveld Complex (19)
-
Free State South Africa
-
Vredefort Dome (37)
-
-
Gauteng South Africa
-
Johannesburg South Africa (3)
-
-
Klerksdorp Field (1)
-
Limpopo South Africa (1)
-
Merensky Reef (1)
-
Mpumalanga South Africa
-
Barberton South Africa (1)
-
-
Murchison greenstone belt (1)
-
Northern Cape Province South Africa
-
Kimberley South Africa (1)
-
-
North-West Province South Africa (3)
-
Transvaal region (5)
-
Vaal River (1)
-
Witwatersrand (12)
-
-
-
Zimbabwe Craton (2)
-
-
Arctic region
-
Greenland (2)
-
-
Arran (1)
-
Asia
-
Arabian Peninsula
-
United Arab Emirates
-
Ras al-Khaimah (1)
-
-
-
Far East
-
China
-
North China Platform (1)
-
Qinling Mountains (1)
-
-
-
Indian Peninsula
-
India
-
Orissa India (1)
-
Singhbhum shear zone (1)
-
-
-
Krasnoyarsk Russian Federation
-
Taymyr Dolgan-Nenets Russian Federation
-
Norilsk region (1)
-
-
-
Tibetan Plateau (1)
-
-
Australasia
-
Australia
-
Western Australia
-
Pilbara Craton (1)
-
Yilgarn Craton (1)
-
-
-
-
Canada
-
Eastern Canada
-
Maritime Provinces
-
Nova Scotia
-
Cobequid Highlands (1)
-
-
-
Ontario
-
Strathcona Mine (1)
-
Sudbury Basin (2)
-
Sudbury District Ontario (3)
-
Sudbury igneous complex (12)
-
Sudbury Ontario (1)
-
Sudbury Structure (12)
-
-
-
Nunavut
-
Devon Island (1)
-
-
Queen Elizabeth Islands
-
Devon Island (1)
-
-
Western Canada
-
Northwest Territories (1)
-
-
-
Central America
-
Nicaragua (1)
-
-
Chicxulub Crater (1)
-
Commonwealth of Independent States
-
Russian Federation
-
Karelia Russian Federation (1)
-
Krasnoyarsk Russian Federation
-
Taymyr Dolgan-Nenets Russian Federation
-
Norilsk region (1)
-
-
-
-
Ukraine (1)
-
-
Eurasia (1)
-
Europe
-
Alps
-
Swiss Alps
-
Southern Swiss Alps (1)
-
-
-
Central Europe
-
Germany
-
Bavaria Germany
-
Ries Crater (1)
-
-
-
Switzerland
-
Swiss Alps
-
Southern Swiss Alps (1)
-
-
Ticino Switzerland (1)
-
-
-
Karelia Russian Federation (1)
-
Southern Europe
-
Italy
-
Ivrea-Verbano Zone (3)
-
Piemonte Italy (1)
-
-
-
Ukraine (1)
-
Western Europe
-
Iceland (1)
-
Scandinavia
-
Sweden
-
Dalarna Sweden
-
Siljan (1)
-
-
-
-
United Kingdom
-
Great Britain
-
Scotland
-
Hebrides
-
Inner Hebrides
-
Isle of Skye (1)
-
-
-
Highland region Scotland
-
Inverness-shire Scotland
-
Isle of Skye (1)
-
-
-
-
-
-
-
-
Jack Hills (1)
-
Mexico
-
Yucatan Mexico (1)
-
-
North America
-
Canadian Shield
-
Grenville Province (1)
-
Southern Province (1)
-
Superior Province (3)
-
-
Rocky Mountains
-
U. S. Rocky Mountains
-
Sangre de Cristo Mountains (1)
-
-
-
-
South America
-
Brazil (1)
-
Guyana (1)
-
-
United States
-
Arizona
-
Coconino County Arizona
-
Meteor Crater (1)
-
-
-
New Mexico
-
Santa Fe County New Mexico (1)
-
-
Oklahoma
-
Kiowa County Oklahoma (1)
-
Wichita Mountains (1)
-
-
Southern Oklahoma Aulacogen (1)
-
U. S. Rocky Mountains
-
Sangre de Cristo Mountains (1)
-
-
-
-
commodities
-
fluorspar deposits (1)
-
metal ores
-
arsenic ores (1)
-
base metals (1)
-
chromite ores (1)
-
cobalt ores (2)
-
copper ores (13)
-
gold ores (6)
-
lead ores (1)
-
lead-zinc deposits (1)
-
nickel ores (13)
-
platinum ores (10)
-
uranium ores (2)
-
vanadium ores (1)
-
zinc ores (1)
-
-
mineral deposits, genesis (7)
-
mineral exploration (6)
-
placers (1)
-
-
elements, isotopes
-
carbon
-
C-13/C-12 (2)
-
-
chemical ratios (3)
-
halogens
-
bromine (1)
-
chlorine (2)
-
-
hydrogen
-
D/H (1)
-
-
isotope ratios (20)
-
isotopes
-
radioactive isotopes
-
Be-10 (1)
-
Os-187/Os-186 (2)
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (2)
-
Pu-244 (1)
-
-
stable isotopes
-
C-13/C-12 (2)
-
Cr-53/Cr-52 (1)
-
D/H (1)
-
He-3 (1)
-
Hf-177/Hf-176 (3)
-
Li-7/Li-6 (2)
-
Nd-144/Nd-143 (2)
-
O-18/O-16 (3)
-
Os-187/Os-186 (2)
-
Os-188/Os-187 (4)
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (2)
-
Pb-207/Pb-206 (3)
-
Sr-87/Sr-86 (1)
-
W-182 (2)
-
-
-
metals
-
actinides
-
plutonium
-
Pu-244 (1)
-
-
-
alkali metals
-
lithium
-
Li-7/Li-6 (2)
-
-
potassium (1)
-
-
alkaline earth metals
-
beryllium
-
Be-10 (1)
-
-
strontium
-
Sr-87/Sr-86 (1)
-
-
-
chromium
-
Cr-53/Cr-52 (1)
-
-
cobalt (1)
-
gold (2)
-
hafnium
-
Hf-177/Hf-176 (3)
-
-
lead
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (2)
-
Pb-207/Pb-206 (3)
-
-
nickel (1)
-
platinum group
-
iridium (1)
-
osmium
-
Os-187/Os-186 (2)
-
Os-188/Os-187 (4)
-
-
palladium (1)
-
platinum (1)
-
platinum ores (10)
-
rhodium (1)
-
ruthenium (1)
-
-
precious metals (2)
-
rare earths
-
cerium (2)
-
europium (1)
-
neodymium
-
Nd-144/Nd-143 (2)
-
-
ytterbium (1)
-
yttrium (2)
-
-
titanium (1)
-
tungsten
-
W-182 (2)
-
-
vanadium (1)
-
zinc (1)
-
-
noble gases
-
helium
-
He-3 (1)
-
-
xenon (1)
-
-
oxygen
-
O-18/O-16 (3)
-
-
phosphorus (1)
-
trace metals (1)
-
-
geochronology methods
-
(U-Th)/He (1)
-
Ar/Ar (8)
-
K/Ar (2)
-
paleomagnetism (6)
-
Rb/Sr (2)
-
Re/Os (2)
-
Sm/Nd (3)
-
thermochronology (1)
-
U/Pb (24)
-
U/Th/Pb (2)
-
-
geologic age
-
Cenozoic
-
Quaternary
-
Pleistocene (1)
-
-
Stone Age
-
Paleolithic
-
Acheulian (1)
-
-
-
Tertiary
-
Paleogene
-
Paleocene
-
lower Paleocene
-
K-T boundary (2)
-
-
-
-
-
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous
-
K-T boundary (2)
-
-
-
Jurassic
-
Lower Jurassic
-
Hettangian (1)
-
Triassic-Jurassic boundary (1)
-
-
-
Triassic
-
Upper Triassic
-
Rhaetian (1)
-
Triassic-Jurassic boundary (1)
-
-
-
-
Paleozoic
-
Cambrian
-
Lower Cambrian (1)
-
-
Carboniferous (1)
-
Devonian
-
Upper Devonian (1)
-
-
Ordovician
-
Upper Ordovician (1)
-
-
-
Phanerozoic (5)
-
Precambrian
-
Archean
-
Mesoarchean (4)
-
Neoarchean (2)
-
Paleoarchean (2)
-
-
Central Rand Group (1)
-
Hadean (4)
-
Levack Gneiss (1)
-
Nipissing Diabase (1)
-
Transvaal Supergroup (3)
-
upper Precambrian
-
Proterozoic
-
Huronian
-
Onaping Formation (2)
-
-
Malmani Subgroup (2)
-
Mesoproterozoic (4)
-
Neoproterozoic
-
Torridonian (1)
-
-
Paleoproterozoic
-
Birimian (1)
-
Chelmsford Formation (2)
-
Rooiberg Group (2)
-
Rustenburg Layered Suite (3)
-
Whitewater Group (2)
-
-
Pretoria Group (1)
-
-
-
Ventersdorp Supergroup (3)
-
Waterberg System (3)
-
Witwatersrand Supergroup (4)
-
-
-
igneous rocks
-
igneous rocks
-
feldspathoid rocks (1)
-
granophyre (10)
-
kimberlite (1)
-
plutonic rocks
-
anorthosite (1)
-
diabase (2)
-
diorites
-
ferrodiorite (1)
-
quartz diorites (1)
-
tonalite (2)
-
trondhjemite (2)
-
-
gabbros
-
norite (2)
-
-
granites
-
adamellite (2)
-
aplite (2)
-
A-type granites (3)
-
granite porphyry (1)
-
monzogranite (1)
-
-
granodiorites (5)
-
pegmatite (3)
-
syenites
-
nepheline syenite
-
miaskite (1)
-
-
-
ultramafics
-
chromitite (1)
-
peridotites (1)
-
pyroxenite (1)
-
-
-
volcanic rocks
-
andesites (2)
-
basalts
-
alkali basalts (1)
-
flood basalts (1)
-
mid-ocean ridge basalts (1)
-
ocean-island basalts (1)
-
-
dacites (1)
-
glasses (1)
-
komatiite (2)
-
rhyolites
-
quartz porphyry (1)
-
-
-
-
-
metamorphic rocks
-
metamorphic rocks
-
amphibolites (1)
-
cataclasites (1)
-
gneisses (7)
-
granulites (2)
-
impactites
-
impact breccia
-
suevite (1)
-
-
-
metasedimentary rocks
-
metapelite (1)
-
-
migmatites (2)
-
mylonites
-
pseudotachylite (16)
-
-
quartzites (1)
-
schists
-
greenstone (2)
-
-
-
-
meteorites
-
meteorites
-
iron meteorites (1)
-
stony meteorites
-
achondrites (1)
-
chondrites
-
ordinary chondrites
-
L chondrites (2)
-
-
-
-
-
-
minerals
-
carbonates
-
aragonite (1)
-
bastnaesite (1)
-
calcite (1)
-
parisite (1)
-
synchysite (1)
-
-
halides
-
fluorides
-
bastnaesite (1)
-
fluorite (1)
-
parisite (1)
-
synchysite (1)
-
-
-
native elements
-
diamond (1)
-
graphite (1)
-
-
oxides
-
hydroxides
-
oxyhydroxides (1)
-
-
iron oxides (3)
-
rutile (1)
-
-
phosphates
-
apatite (2)
-
monazite (2)
-
-
silicates
-
chain silicates
-
amphibole group (2)
-
pyroxene group
-
clinopyroxene
-
spodumene (1)
-
-
-
-
framework silicates
-
feldspar group
-
alkali feldspar
-
anorthoclase (1)
-
K-feldspar (1)
-
-
plagioclase (2)
-
-
silica minerals
-
lechatelierite (1)
-
quartz (3)
-
-
-
orthosilicates
-
nesosilicates
-
olivine group
-
olivine (1)
-
-
titanite group
-
titanite (2)
-
-
zircon group
-
thorite (1)
-
zircon (32)
-
-
-
sorosilicates
-
epidote group
-
epidote (1)
-
-
-
-
sheet silicates
-
chlorite group
-
chlorite (1)
-
-
mica group
-
biotite (5)
-
muscovite (3)
-
-
-
-
sulfides
-
chalcopyrite (1)
-
copper sulfides (1)
-
cubanite (1)
-
nickel sulfides (1)
-
pentlandite (1)
-
pyrite (1)
-
pyrrhotite (1)
-
-
-
Primary terms
-
absolute age (40)
-
Africa
-
Central Africa
-
Congo Democratic Republic (1)
-
-
Limpopo Belt (2)
-
Southern Africa
-
Barberton greenstone belt (1)
-
Botswana (4)
-
Kaapvaal Craton (23)
-
Namaqualand metamorphic complex (1)
-
Orange River (1)
-
South Africa
-
Bushveld Complex (19)
-
Free State South Africa
-
Vredefort Dome (37)
-
-
Gauteng South Africa
-
Johannesburg South Africa (3)
-
-
Klerksdorp Field (1)
-
Limpopo South Africa (1)
-
Merensky Reef (1)
-
Mpumalanga South Africa
-
Barberton South Africa (1)
-
-
Murchison greenstone belt (1)
-
Northern Cape Province South Africa
-
Kimberley South Africa (1)
-
-
North-West Province South Africa (3)
-
Transvaal region (5)
-
Vaal River (1)
-
Witwatersrand (12)
-
-
-
Zimbabwe Craton (2)
-
-
Arctic region
-
Greenland (2)
-
-
Asia
-
Arabian Peninsula
-
United Arab Emirates
-
Ras al-Khaimah (1)
-
-
-
Far East
-
China
-
North China Platform (1)
-
Qinling Mountains (1)
-
-
-
Indian Peninsula
-
India
-
Orissa India (1)
-
Singhbhum shear zone (1)
-
-
-
Krasnoyarsk Russian Federation
-
Taymyr Dolgan-Nenets Russian Federation
-
Norilsk region (1)
-
-
-
Tibetan Plateau (1)
-
-
asteroids (2)
-
atmosphere (1)
-
Australasia
-
Australia
-
Western Australia
-
Pilbara Craton (1)
-
Yilgarn Craton (1)
-
-
-
-
Canada
-
Eastern Canada
-
Maritime Provinces
-
Nova Scotia
-
Cobequid Highlands (1)
-
-
-
Ontario
-
Strathcona Mine (1)
-
Sudbury Basin (2)
-
Sudbury District Ontario (3)
-
Sudbury igneous complex (12)
-
Sudbury Ontario (1)
-
Sudbury Structure (12)
-
-
-
Nunavut
-
Devon Island (1)
-
-
Queen Elizabeth Islands
-
Devon Island (1)
-
-
Western Canada
-
Northwest Territories (1)
-
-
-
carbon
-
C-13/C-12 (2)
-
-
Cenozoic
-
Quaternary
-
Pleistocene (1)
-
-
Stone Age
-
Paleolithic
-
Acheulian (1)
-
-
-
Tertiary
-
Paleogene
-
Paleocene
-
lower Paleocene
-
K-T boundary (2)
-
-
-
-
-
-
Central America
-
Nicaragua (1)
-
-
chemical analysis (1)
-
continental drift (1)
-
crust (12)
-
crystal chemistry (1)
-
crystal growth (3)
-
crystal structure (2)
-
data processing (1)
-
deformation (16)
-
diagenesis (1)
-
Earth (2)
-
earthquakes (2)
-
Eurasia (1)
-
Europe
-
Alps
-
Swiss Alps
-
Southern Swiss Alps (1)
-
-
-
Central Europe
-
Germany
-
Bavaria Germany
-
Ries Crater (1)
-
-
-
Switzerland
-
Swiss Alps
-
Southern Swiss Alps (1)
-
-
Ticino Switzerland (1)
-
-
-
Karelia Russian Federation (1)
-
Southern Europe
-
Italy
-
Ivrea-Verbano Zone (3)
-
Piemonte Italy (1)
-
-
-
Ukraine (1)
-
Western Europe
-
Iceland (1)
-
Scandinavia
-
Sweden
-
Dalarna Sweden
-
Siljan (1)
-
-
-
-
United Kingdom
-
Great Britain
-
Scotland
-
Hebrides
-
Inner Hebrides
-
Isle of Skye (1)
-
-
-
Highland region Scotland
-
Inverness-shire Scotland
-
Isle of Skye (1)
-
-
-
-
-
-
-
-
explosions (1)
-
faults (14)
-
fluorspar deposits (1)
-
folds (1)
-
foliation (3)
-
fractures (8)
-
geochemistry (14)
-
geochronology (4)
-
geomorphology (1)
-
geophysical methods (10)
-
ground water (1)
-
heat flow (2)
-
hydrogen
-
D/H (1)
-
-
igneous rocks
-
feldspathoid rocks (1)
-
granophyre (10)
-
kimberlite (1)
-
plutonic rocks
-
anorthosite (1)
-
diabase (2)
-
diorites
-
ferrodiorite (1)
-
quartz diorites (1)
-
tonalite (2)
-
trondhjemite (2)
-
-
gabbros
-
norite (2)
-
-
granites
-
adamellite (2)
-
aplite (2)
-
A-type granites (3)
-
granite porphyry (1)
-
monzogranite (1)
-
-
granodiorites (5)
-
pegmatite (3)
-
syenites
-
nepheline syenite
-
miaskite (1)
-
-
-
ultramafics
-
chromitite (1)
-
peridotites (1)
-
pyroxenite (1)
-
-
-
volcanic rocks
-
andesites (2)
-
basalts
-
alkali basalts (1)
-
flood basalts (1)
-
mid-ocean ridge basalts (1)
-
ocean-island basalts (1)
-
-
dacites (1)
-
glasses (1)
-
komatiite (2)
-
rhyolites
-
quartz porphyry (1)
-
-
-
-
inclusions
-
fluid inclusions (2)
-
-
intrusions (21)
-
isotopes
-
radioactive isotopes
-
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1-20 OF 137 RESULTS FOR
Vredefort Granophyre
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Journal Article
Petrography and geochemistry of coarse-crystalline veins within Vredefort Granophyre, Vredefort impact structure, South Africa
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 December 2018
South African Journal of Geology (2018) 121 (4): 383–402.
...E. Kovaleva; M.S. Huber; F. Zaccarini Abstract Vredefort Granophyre dykes are generally considered to be a part of impact melt, which intruded downward from the melt sheet of the Vredefort impact structure (South Africa). This work reports enigmatic textural inhomogeneities found within the Daskop...
Journal Article
Re-Os isotope and geochemical study of the Vredefort Granophyre: Clues to the origin of the Vredefort structure, South Africa
Journal: Geology
Publisher: Geological Society of America
Published: 01 October 1996
Geology (1996) 24 (10): 913–916.
...Christian Koeberl; Wolf Uwe Reimold; Steven B. Shirey Abstract The origin of granophyric rock dikes (the Vredefort Granophyre) at the 2 Ga Vredefort structure in South Africa has been controversial. They have been interpreted as either impact melt or igneous intrusions. Most Vredefort Granophyre...
Journal Article
Geochemistry and impact origin of the Vredefort Granophyre
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 June 1997
South African Journal of Geology (1997) 100 (2): 115–122.
...A. M. Therriault; W. U. Reimold; A. M. Reid Abstract The Vredefort impact structure contains a suite of granophyric dykes, referred to as the Vredefort Granophyre, occurring within and at the edge of the Archaean basement core. New whole-rock chemical analyses, together with previous data...
Journal Article
Granular zircon from Vredefort granophyre (South Africa) confirms the deep injection model for impact melt in large impact structures
Journal: Geology
Publisher: Geological Society of America
Published: 22 May 2019
Geology (2019) 47 (8): 691–694.
...Elizaveta Kovaleva; Dmitry A. Zamyatin; Gerlinde Habler Abstract The Vredefort impact structure, South Africa, is a 2.02 Ga deeply eroded meteorite scar that provides an opportunity to study large impact craters at their lower stratigraphic levels. A series of anomalous granophyre dikes in the core...
Journal Article
Comment on “Pseudotachylite vein hosted by a clast in the Vredefort Granophyre: characterization, origin and relevance” by E. Kovaleva et al., South African Journal of Geology, 2018, doi:10.25131/sajg.121.0002
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 March 2019
South African Journal of Geology (2019) 122 (1): 105–108.
.... and Praekelt , H. , 2018 . Pseudotachylite vein hosted by a clast in the Vredefort Granophyre: characterization, origin and relevance . South African Journal of Geology , doi:25131/sajg.121.0002 Lieger , D. and Riller , U. , 2012 . Emplacement history of Granophyre dikes in the Vredefort...
Journal Article
Reply to the comment made by W.U. Reimold on “Pseudotachylite vein hosted by a clast in the Vredefort Granophyre: characterization, origin and relevance” by E. Kovaleva et al., South African Journal of Geology, 2018, 121, 51-68. doi:10.25131/sajg.121.0002
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 March 2019
South African Journal of Geology (2019) 122 (1): 109–115.
... , P.C. and Reimold , W.U. , 2002 . Planar deformation features and impact glass in inclusions from the Vredefort Granophyre, South Africa . Meteoritics and Planetary Science 37 , 807 – 822 . Cavosie , A.J. , Erickson , T.M. , Timms , N.E. , Reddy , S.M. , Talavera...
Journal Article
Pseudotachylite vein hosted by a clast in the Vredefort Granophyre: characterization, origin and relevance
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 March 2018
South African Journal of Geology (2018) 121 (1): 51–68.
...E. Kovaleva; M.S. Huber; F. Roelofse; M. Tredoux; H. Praekelt Abstract A small, meta-granitic clast with a crosscutting microcrystalline vein was found enclosed within the Vredefort Granophyre. Semi-quantitative chemical analyses of the granophyre, granitic clast, and the vein were obtained in situ...
Journal Article
STABLE ISOTOPE EVIDENCE FOR IMPACT-RELATED PSEUDOTACHYLITE FORMATION AT VREDEFORT BY LOCAL MELTING OF DRY ROCKS
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 June 2013
South African Journal of Geology (2013) 116 (1): 101–118.
...C. HARRIS; D.S. FOURIE; A. FAGERENG Abstract We have determined the major element composition, δ 18 O and δD values, and water content of impact-related granophyre, and pseudotachylite, from various Vredefort Dome localities, aiming to constrain the mechanism of melt formation and the relationship...
Journal Article
A geochemical contribution to the discussion about the genesis of impact-related pseudotachylitic breccias: Studies of PTB in the Otavi and Kudu Quarries of the Vredefort Dome support the “In Situ Formation” hypothesis
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 September 2016
South African Journal of Geology (2016) 119 (3): 453–472.
... of locally occurring granitoids and amphibolite. Harmonic least-squares mixing (HMX) calculations also do not indicate that additional components, such as a Vredefort Granophyre-like impact melt intrusive phase, contributed to the formation of these PTB. Absence of evidence (such as significant displacements...
Journal Article
Process of granophyre crystallization in the Long Mountain Granite, southern Oklahoma
Journal: GSA Bulletin
Publisher: Geological Society of America
Published: 01 July 2012
GSA Bulletin (2012) 124 (7-8): 1251–1261.
... S.E. , 1986 , Quartz crystallization in igneous rocks : The American Mineralogist , v . 71 , p. 331 – 342 . Therriault A.M. Reimold W.U. Reid A.M. , 1997 , Geochemistry and impact origin of the Vredefort granophyre : South African Journal of Geology , v. 100 , p. 115...
Journal Article
Impact spherules from Karelia, Russia: Possible ejecta from the 2.02 Ga Vredefort impact event
Journal: Geology
Publisher: Geological Society of America
Published: 01 May 2014
Geology (2014) 42 (5): 375–378.
... , p. 416 – 430 , doi:10.1016/j.icarus.2011.11.020 . Kamo S. Reimold W.U. Krogh T.E. Colliston W.P. , 1996 , A 2.023 Ga age for the Vredefort impact event and a first report of shock metamorphosed zircons in pseudotachylitic breccias and granophyre : Earth and Planetary...
Journal Article
Metamorphism on the Moon: A terrestrial analogue in the Vredefort dome, South Africa?
Journal: Geology
Publisher: Geological Society of America
Published: 01 May 2002
Geology (2002) 30 (5): 475–478.
... to Paleoproterozoic supracrustal rocks and intrusions ( Fig. 1 ). The rocks display a variety of impact-related features, including shatter cones, coesite and stishovite, planar deformation features in quartz, dikes of impact melt breccia (Vredefort Granophyre, Fig. 1 ), and voluminous pseudotachylitic breccias...
Journal Article
Discovery of mafic impact melt in the center of the Vredefort dome: Archetype for continental residua of early Earth cratering?
Journal: Geology
Publisher: Geological Society of America
Published: 01 May 2014
Geology (2014) 42 (5): 403–406.
... and Gerdes, 2012 ) and Ventersdorp and Transvaal units ( Stevenson and Patchett, 1990 ) that would have melted to form the Vredefort melt sheet. Because a similar 3.2 Ga Sm-Nd model age is exhibited by the 2.02 Ga bronzite granophyre dikes that have crustal and meteoritic composition ( Koeberl et al., 1996...
Journal Article
Discussion of “New zircon shock phenomena and their use for dating and reconstruction of large impact structures revealed by electron nanobeam (EBSD, CL, EDS) and isotopic U–Pb and (U–Th)/He analysis of the Vredefort dome” 1 Appears in Canadian Journal of Earth Sciences, 2011, 48 (2): 117–139 [doi: 10.1139/E11-011 ].
Journal: Canadian Journal of Earth Sciences
Publisher: Canadian Science Publishing
Published: 04 June 2012
Canadian Journal of Earth Sciences (2012) 49 (7): 857–862.
... pegmatite from the Vredefort dome. South African Journal of Geology , 91 : 550 – 552 . Buchanan P.C. Reimold W.U. 2002 . Planar deformation features and impact glass in inclusions from the Vredefort Granophyre, South Africa. Meteoritics & Planetary Science , 37 ( 6 ): 807 – 822...
Journal Article
Shocked and thermally metamorphosed zircon from the Vredefort impact structure, South Africa : a transmission electron microscopic study
Journal: European Journal of Mineralogy
Published: 01 September 2002
European Journal of Mineralogy (2002) 14 (5): 859–868.
..., and planar deformation features in quartz, zircon and feldspar (see reviews in Reimold & Gibson, 1996 ; Gibson & Reimold, 2000 , 2001 ; Gibson et al. , 2001 ). In addition, the detection of a small meteoritic component in the Re-Os systematics of the Vredefort Granophyre ( Koeberl et al. , 1996...
Journal Article
Correlating planar microstructures in shocked zircon from the Vredefort Dome at multiple scales: Crystallographic modeling, external and internal imaging, and EBSD structural analysis
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 January 2013
American Mineralogist (2013) 98 (1): 53–65.
... of quartz in nature and experiment: I. Basic observation and theory . Meteoritics and Planetary Science , 29 , 155 – 181 . Therriault A.M. Reimold W.U. Reid A.M. ( 1996 ) Field relations and petrography of the Vredefort Granophyre . South African Journal of Science , 99 , 1 – 21...
Journal Article
Comparative study of pseudotachylite microstructures in felsic and mafic rocks from the Vredefort impact structure, South Africa. Implications for the experimental studies
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 December 2018
South African Journal of Geology (2018) 121 (4): 403–420.
... locally-derived composition of pseudotachylitic melt (e.g. Mohr-Westheide et al., 2009 ; Harris et al., 2013 ; Reimold et al., 2017 ). Additionally, recent work has demonstrated that at least one generation of PT was formed prior to the emplacement of Vredefort Granophyre, thereby limiting...
Journal Article
The Roodekraal Complex as a constraint on the size of the Vredefort impact crater, South Africa
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 September 2008
South African Journal of Geology (2008) 111 (2-3): 305–312.
... microdeformation, shatter cones, pseudotachylite veins and related breccias, as well as dykes of bronzite granophyre (referred to as the Vredefort Granophyre) deemed to be impact melt ( Gibson and Reimold, 2001 ; Reimold and Gibson, 2005 ; and references therein). The age of the impact event was dated by Kamo...
Journal Article
A record of ancient cataclysm in modern sand: Shock microstructures in detrital minerals from the Vaal River, Vredefort Dome, South Africa
Journal: GSA Bulletin
Publisher: Geological Society of America
Published: 01 November 2010
GSA Bulletin (2010) 122 (11-12): 1968–1980.
... at the Vredefort Dome, both of which have been interpreted to represent impact melts, including granophyre ( Kamo et al., 1996 ) and metanorite ( Moser, 1997 ; Cupelli and Moser, 2009 ). Given that granular texture zircon has only been reported from these two relatively minor rock types, it is remarkable...
Journal Article
Pseudotachylitic breccia and microfracture networks in Archean gneiss of the central uplift of the Vredefort Impact Structure, South Africa
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 March 2009
South African Journal of Geology (2009) 112 (1): 1–22.
... specific types of melt rock that are related to the impact event: pseudotachylitic breccia and the Vredefort impact melt rock known as “Vredefort Granophyre” ( Reimold and Gibson, 2006 ). The basement rocks and supracrustal strata were intruded by several phases of dioritic and alkali granitic magmas...