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Ferrar Traps

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Journal Article
Journal: Geology
Published: 01 August 2000
Geology (2000) 28 (8): 747-750.
... and Toarcian increase of the Sr isotope ratio is suggested to record the onset of Karoo-Ferrar volcanism. A similar inflection occurs in the Late Permian, although it appears to predate slightly the Siberian Traps ( Martin and Macdougall, 1995 ). The formation of the Central Atlantic Magmatic Province around...
FIGURES
Series: Geological Society, London, Special Publications
Published: 01 January 2018
DOI: 10.1144/SP463.1
EISBN: 9781786203441
... Fig. 7. ( a ) Schematic column to show the distribution of Ferrar Dolerite sills in basement rocks and the Victoria Group of the Beacon Supergroup in the Shackleton Glacier region, and a stratigraphic column for Kirkpatrick Basalt lavas at Mt Bumstead (see Fig. 8 for the locations). ( b...
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Journal Article
Published: 01 October 2009
Bulletin of the Seismological Society of America (2009) 99 (5): 2681-2703.
...). The trenched fault strand forms an uphill-facing scarp and associated sediment trap below a small catchment area. The trench exposed a narrow fault zone that has juxtaposed a sequence of weakly defined paleosols interbedded with colluvium against highly fractured bedrock. We mapped magnetic susceptibility...
FIGURES | View All (11)
Journal Article
Journal: GSA Bulletin
Published: 01 September 2015
GSA Bulletin (2015) 127 (9-10): 1437-1452.
... Traps mafic volcaniclastic rocks, similar rocks in the Transantarctic Mountains associated with the Jurassic Ferrar large igneous province have been interpreted as the products of an extraordinarily large phreatomagmatic vent complex in the Coombs Hills ( McClintock and White, 2006 ; White...
FIGURES | View All (9)
Series: GSA Special Papers
Published: 01 January 2007
DOI: 10.1130/2007.2430(31)
... on the scale of the whole Siberian Traps FBP. In addition, it offers no solution for coeval basaltic effusive and acidic intrusive volcanism. Almost thirty years ago, Cox (1978) noted that the Parana, Karoo, and Beacon (Ferrar and Kirkpatrick) traps erupted within the southern part of Gondwana in back-arc...
Journal Article
Journal: Geology
Published: 16 November 2017
Geology (2018) 46 (1): 35-38.
... in the lower crust within the gap. This body has acted as a seal to trap fluids and over-pressurize the plate interface, thereby generating a transient slip region allowing for SSEs to invade the seismogenic zone. This suggests that transient slip can occur in typically seismogenic regions, but requires...
FIGURES
Journal Article
Journal: GSA Bulletin
Published: 01 January 2013
GSA Bulletin (2013) 125 (7-8): 1053-1078.
..., as well as magmatism impacting on the hydrocarbon potential of volcanic basins and rifted margins through enhancing source-rock maturation, providing fluid migration pathways, and initiating trap formation. (4) Biospheric, hydrospheric, and atmospheric impacts of large igneous provinces are now widely...
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Journal Article
Published: 01 January 2005
Italian Journal of Geosciences (2005) 124 (2): 475-491.
... is usually present in many rock-formations (pelites, sandstones and also carbonates) which in places underwent very low- to low-grade metamorphism. The waters become chlorine sodic when they mix with Cl-rich waters (e.g.: Porretta, Bologna province; Bobbio, Piacenza province), which were trapped during...
Journal Article
Published: 01 November 2004
European Journal of Mineralogy (2004) 16 (6): 899-908.
... crystallization of both phases from a trapped partial melt. Four samples for transmission electron microscopy investigations were prepared by ion milling discs 3 mm in diameter, taken from petrographic thin sections already used for EMPA. The carbon-coated samples were analysed with a Philips CM30ST...
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Journal Article
Published: 01 September 1999
Journal of the Geological Society (1999) 156 (5): 901-916.
...;0.704) are suggestive of predominantly asthenospheric mantle derivation. N–S dykes, which are the most numerous, resemble the Ferrar magma type of Antarctica and the rare Hangnest and Kraai River magma types of the Karoo. The N–S dykes evolved by assimilation and fractional crystallization (AFC), most...
Journal Article
Journal: GSA Bulletin
Published: 01 November 2010
GSA Bulletin (2010) 122 (11-12): 1830-1845.
.... To determine the timing of paleoearthquakes at Elmacik, we describe a link between cyclic sedimentation in a sediment trap formed by an upslope-facing fault scarp and large ground-rupturing earthquakes, and we use radiocarbon dating to constrain their age. The trench revealed a sequence of interbedded fine...
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Journal Article
Journal: Geology
Published: 01 November 2008
Geology (2008) 36 (11): 843-846.
... are so well constrained. Water outflow occurs through penstocks (i.e., pipes) embedded in the Glen Canyon Dam >80 m above the adjacent reservoir floor ( Fig. 2A ), so essentially all sediments that enter the reservoir are trapped within it. This trapping began when the dam was completed 11 April 1963...
FIGURES
Series: AAPG Studies in Geology
Published: 01 January 2005
DOI: 10.1306/St531003C15
EISBN: 9781629810447
... merging channel networks that are continuous across the wind gaps ( Figures 3 , 4 ). This implied reorganization of drainage networks is an effect of decreasing stream power caused by decreasing stream gradients associated with fold growth. As a result, sediment is preferentially trapped north and south...
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Journal Article
Journal: Economic Geology
Published: 01 August 2003
Economic Geology (2003) 98 (5): 1029-1037.
... level of the La Guitarra mine. The results of the 40 Ar/ 39 Ar step heating experiments are given in Figure 4 (orthoclase from host monzogranite), Figure 5 (mineralization stage IIA adularia), and Figure 6 (mineralization stage IIB adularia). All ages and trapped 40 Ar/ 36 Ar ratios...
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Series: European Mineralogical Union Notes in Mineralogy 14
Published: 01 January 2013
DOI: 10.1180/EMU-notes.14.1
EISBN: 9780903056380
... sulfosalts that replace one another are likely to act as traps for nano-particulate gold. This is shown by the fact that they appear enriched in Au by several orders of magnitude. HAADF-STEM analyses of (1) symplectites formed during retrograde replacement of both heyrovskýite (Pb 6 Bi 2 S 9 ) and Ag...
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Journal Article
Published: 01 October 2012
Italian Journal of Geosciences (2012) 131 (3): 330-347.
FIGURES | View All (7)
Journal Article
Published: 01 April 2014
Mineralogical Magazine (2014) 78 (2): 325-345.
FIGURES | View All (8)
Series: European Mineralogical Union Notes in Mineralogy
Published: 01 January 2003
DOI: 10.1180/EMU-notes.5.7
EISBN: 9780903056540
.... However, the detection of “heterogeneity” within a matrix is just a first step. In fact, discrimination between true exsolutions, zone growing, trapped phases and similar phenomena is often not straightforward and requires a skilled capability of interpretation based on several aspects, like stability...
FIGURES | View All (16)
Series: GSA Special Papers
Published: 01 January 2007
DOI: 10.1130/2007.2422(05)
... and Wallace, 2003a , 2003b ). These inclusions (tiny samples of basaltic magma that were trapped in the olivines during crystallization) have water contents that vary between 1.3% and 5.2%, incorporate large quantities of other fluid mobile elements, and have the high LILE/HFSE ratios that are typical of arc...
Series: GSA Special Papers
Published: 01 September 2014
DOI: 10.1130/2014.2505(15)
... for the following flood basalt provinces: Columbia, Brito-Arctic, Deccan, Karoo-Ferrar, Central Atlantic magmatic province, and Siberian Traps. Large igneous province volcanism occurs in a highly discontinuous way, on embedded time scales, on the order of 10 m.y., 1 m.y., 100 k.y., and 10 yr. This provides...