Long-distance transport of magmas in the Jurassic Ferrar Large Igneous Province, Antarctica

Elliot, David H.; Fleming, Thomas H.; Kyle, Philip R.; Foland, K. A.

doi:10.1016/s0012-821x(99)00023-0

Cited by 141 publications

(88 citation statements)

References 33 publications

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“…[23] Long-distance magma transport (>3000 km) for the lavas of the Ferrar Large Igneous Province (FLIP) has been suggested by Elliot et al [1999]. Given scale comparisons with the Mackenzie dike swarm, we propose that the Forrestal dike swarm extends to the southwest, and may have acted as a long-distance transportation and feeder system for the FLIP.…”

Section: Comparison With the Mackenzie Dyke Swarmmentioning

confidence: 96%

The Dufek and Forrestal intrusions, Antarctica: A centre for Ferrar Large Igneous Province dike emplacement?

Ferris

Storey

Vaughan

et al. 2003

Geophysical Research Letters

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Newly acquired aeromagnetic data indicate the presence of a dike swarm that may have acted as a magma transport and feeder system from the plume impact site up to 3,500 km to the Ferrar Large Igneous Province (FLIP). The Dufek and Forrestal intrusions, cover approximately 6,600 km2, and may form a ponding station between a mantle superplume responsible for Gondwana breakup and the FLIP sills and lavas along the Transantarctic Mountains into Tasmania and New Zealand. Prior to this survey, no feeder dike swarms or sills connecting with the Ferrar have been found in the Pensacola Mountains. Similarities with the Mackenzie dikes and intrusions of Northwest Canada imply that Jurassic dikes may have been emplaced into the pre‐existing Ross orogeny trend during doming above a mantle plume. However, our survey area is too small to show the dikes convincingly radiating from a focal point that would indicate the plume position.

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Section: Comparison With the Mackenzie Dyke Swarmmentioning

confidence: 96%

The Dufek and Forrestal intrusions, Antarctica: A centre for Ferrar Large Igneous Province dike emplacement?

Ferris

Storey

Vaughan

et al. 2003

Geophysical Research Letters

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“…Tholeiitic Ferrar magmatism (Elliot et al, 1999;Elliot and Fleming, 2004) and modest extension to transtension initiated in the WARS at this time (Storey, 1991(Storey, , 1992Wilson, 1993). The Cretaceous WARS has been inferred to be an asymmetrical extensional system with the TAM forming the structural upper plate and the WARS, the lower plate (e.g., Fitzgerald et al, 1986;Stern and ten Brink, 1989;Fitzgerald and Baldwin, 1997;compare Lister et al, 1991).…”

Section: Extent Of the West Antarctic Rift System (Wars) And Charactementioning

confidence: 99%

Tectonics of the West Antarctic rift system: new light on the history and dynamics of distributed intracontinental extension

Siddoway¹

2007

Open-File Report

109

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“…Storey & Kyle (1997) suggested that the Ferrar magmas flowed laterally away from magma chambers, like that represented by the Dufek intrusion, emplaced in crust up-domed by an underlying 'megaplume' in the mantle of the South Atlantic region. Elliot et al (1999) and Elliot & Fleming (2000, 2004 put the source in a similar position, within the Antarctic-Africa rifted margin, close to the Explora anomaly, and within the region of the Weddell triple junction. The rifted margin between Antarctica and Africa was strongly magmatic during Early Jurassic times.…”

Section: Evidence For Lateral Flowmentioning

confidence: 82%

“…εSr 183 values for both are in the range 61-109, and εNd 183 values range from -3.2 to -5.8 (Hergt et al 1989b;Fleming et al 1995: Molzahn et al 1996Elliot et al 1999). As outlined above, the sills belong to the MFCT group, whereas both SPCT overlies MFCT chemical groups occur in the lavas -with SPCT always overlying MFCT in the lava succession (Fleming et al 1992(Fleming et al , 1995Elliot et al 1999;Elliot & Fleming 2004).…”

Section: Victoria Landmentioning

confidence: 98%

“…Because of the unsatisfactory nature of models involving vertical rise of Ferrar magmas, several authors have, in recent years, suggested that they were emplaced by a lateral flow mechanism of magma though continental crust (Storey & Kyle, 1997;Elliot et al 1999;Elliot & Fleming 2000, 2004Ferris et al 2003;Riley et al 2005;Leat et al 2006). Lateral flow models can maintain the lithosphere-derived geochemical models, but explain the homogeneity of the LIP by origin of all the magmas from one point source.…”

mentioning

confidence: 99%

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Jurassic magmatism in Dronning Maud Land: synthesis of results of the MAMOG project

Leat¹,

Curtis²,

Riley³

et al. 2007

Open-File Report

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Abstract:The distribution and geochemical relationships of the Early Jurassic Ferrar large igneous province (LIP) are examined and it is concluded that they support the lateral flow model for the emplacement of the province, with a source along the strongly magmatic Early Jurassic Antarctica-Africa rifted margin. Published data and new analyses from the Pensacola Range are used to show that the dominant magma type in the Ferrar, the Mount Fazio chemical type (MFCT) occurs in the Theron Mountains, Shackleton Range, Whichaway Nunataks, Pensacola Mountains (all Antarctica), and South Africa, as well as well-known outcrops in Victoria Land, Antarctica, southeast Australia and New Zealand. Chemical compositions are shown to be somewhat varied, but similar enough for them to be considered as representing closely related magmas. Examination of geochemical trends with distance from the interpreted magma source indicates that Mg# and MgO abundances decline with distance travelled, and it is argued that this is consistent with the lateral flow model. The Scarab Peak chemical type (SPCT) occurs as sills in the Theron Mountains and Whichaway Nunataks, and as lavas in Victoria Land, is geochemically very homogeneous. Despite this, Mg#, MgO, Ti/Y and Ti/Zr all fall with distance from the interpreted source, consistent with fractional crystallisation occurring during the lateral flow of the magmas. Flow took place in dykes or (more likely) sills. No feeder dyke swarm has been identified. The distances flowed, at least 4 100 km for MFCT and 3 700 km for SPCT are the longest interpreted lateral magma flows on Earth.End of abstract

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Long-distance transport of magmas in the Jurassic Ferrar Large Igneous Province, Antarctica

Cited by 141 publications

References 33 publications

The Dufek and Forrestal intrusions, Antarctica: A centre for Ferrar Large Igneous Province dike emplacement?

The Dufek and Forrestal intrusions, Antarctica: A centre for Ferrar Large Igneous Province dike emplacement?

Tectonics of the West Antarctic rift system: new light on the history and dynamics of distributed intracontinental extension

Jurassic magmatism in Dronning Maud Land: synthesis of results of the MAMOG project

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