Implications of mantle plume structure for the evolution of flood basalts

Campbell, Ian H.; Griffiths, Ross W.

doi:10.1016/0012-821x(90)90072-6

Cited by 1,125 publications

(473 citation statements)

References 33 publications

Supporting

Mentioning

451

Contrasting

Unclassified

Order By: Relevance

“…These processes may account for the geochemical diversity of CFBs that makes them elementally and isotopically distinct from OIBs 4 . In this model, mantle upwelling is driven by deep-Earth water cycling rather than excess temperature, such as in a classical thermal plume model, which can cause about 0.8-1 km of broad surface uplift per 100°C of plume excess temperature 62 . Because the wet upwelling of mantle requires no excess temperature in this model, there will be no thermal anomaly to result in pre-volcanic eruption surface uplift 62 .…”

Section: Discussionmentioning

confidence: 99%

“…In this model, mantle upwelling is driven by deep-Earth water cycling rather than excess temperature, such as in a classical thermal plume model, which can cause about 0.8-1 km of broad surface uplift per 100°C of plume excess temperature 62 . Because the wet upwelling of mantle requires no excess temperature in this model, there will be no thermal anomaly to result in pre-volcanic eruption surface uplift 62 . Also, some parts of the subducted slab may undergo dehydration melting and release water when it penetrates the 660-km discontinuity into the lower mantle 19 , whereas other subducted slab fragments may be entrapped in wet upwellings and returned to the upper mantle 10,51 .…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Continental flood basalts derived from the hydrous mantle transition zone

et al. 2015

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Continental flood basalts derived from the hydrous mantle transition zone

et al. 2015

View full text Add to dashboard Cite

“…Up to now, the origin of flood basalts, which are represented mainly by tholeiitic basalts, is highly disputable and a variety of models have been developed to explain their origin, but their genesis and sources are very complex. Generally, the following sources can be considered: 1) crustal contamination of MORB-like melts (Piccirillo et al 1989;Campbell & Griffiths 1990;Arndt et al 1993;Peate & Hawkesworth 1996;Campbell 2005);…”

Section: Discussionmentioning

confidence: 99%

Geochemistry and Sr, Nd isotopic composition of the Hronic Upper Paleozoic basic rocks (Western Carpathians, Slovakia)

Vozár¹,

Spišiak²,

Vozárová³

et al. 2015

Geologica Carpathica

View full text Add to dashboard Cite

The paper presents new major and trace element and first Sr-Nd isotope data from selected lavas among the Permian basaltic andesite and basalts of the Hronicum Unit and the dolerite dykes cutting mainly the Pennsylvanian strata. The basic rocks are characterized by small to moderate mg # numbers (30 to 54) and high SiO 2 contents (51-57 wt. %). Low values of TiO 2 (1.07-1.76 wt. %) span the low-Ti basalts. Ti/Y ratios in the dolerite dykes as well as the basaltic andesite and basalt of the 1 st eruption phase are close to the recommended boundary 500 between high-Ti and low-Ti basalts. Ti/Y value from the 2 nd eruption phase basalt is higher and inclined to the high-Ti basalts. In spite of this fact, in all studied Hronicum basic rocks Fe 2 O 3 * is lower than 12 wt. % and Nb/La ratios (0.3-0.6) are low, which is more characteristic of low-Ti basalts. The basic rocks are characterized by Nb/La ratios (0.56 to 0.33), and negative correlations between Nb/La and SiO 2 , which point to crustal assimilation and fraction crystallization. The intercept for Sr evolution lines of the 1 st intrusive phase basalt is closest to the expected extrusions age (about 290 Ma) with an initial 87 Sr/ 86 Sr ratio of about 0.7054. Small differences in calculated values I Sr document a partial Sr isotopic heterogeneity source (0.70435-0.70566), or possible contamination of the original magma by crustal material. For Nd analyses of the three samples, the calculated values εCHUR (285 Ma) are positive (from 1.75 to 3.97) for all samples with only subtle variation. Chemical and isotopic data permit us to assume that the parental magma for the Hronicum basic rocks was generated from an enriched heterogeneous source in the subcontinental lithospheric mantle.

show abstract

“…As the top/head of a mantle plume can partially melt when it reaches shallow depths and pressure is reduced, they are thought to be the cause of volcanic centers and flood basalts (Campbell and Griffiths, 1990;Coffin and Eldholm, 1994;Morgan, 1971;White and McKenzie, 1989;Zhao, 2001). The plume hypothesis has been widely adopted to explain the formation of ageprogressive volcanic chain hotspots such as Hawaii and Large Igneous Provinces (LIPs) in both oceanic and continental settings (Campbell and Griffiths, 1990;Coffin and Eldholm, 1994;Morgan, 1971;White and McKenzie, 1989;Xu et al, 2004Zhao, 2001Zhao, , 2007Zhong and Watts, 2002).…”

Section: Introductionmentioning

confidence: 99%