Tectonic Relationships Between E-Type Cratonic and Ultra-High-Pressure (UHP) Diamond: Implications for Craton Formation and Stabilization

Helmstaedt, Herwart

doi:10.1007/978-81-322-1170-9_4

Cited by 4 publications

(3 citation statements)

References 75 publications

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“…The geochemical and isotopic signatures of the eclogite xenoliths from kimberlites are compatible with those of oceanic crustal rocks. The progressively metamorphosed coesite-and diamond-bearing eclogitic assemblages and coesite inclusions in eclogitic diamonds may be viewed as an expression of Archaean and Proterozoic ultrahigh-pressure (UHP) metamorphic events [Helmstaedt, 2013]. The earliest age for these processes, according to dating of diamondiferous eclogite xenoliths, is ~2.9 Ga [Gurney et al, 2010, and references therein].…”

Section: Subduction-related Modification Of the Subcontinental Lithosmentioning

confidence: 99%

“…The earliest age for these processes, according to dating of diamondiferous eclogite xenoliths, is ~2.9 Ga [Gurney et al, 2010, and references therein]. The appearance of eclogitic UHP metamorphic assemblages at ~2.9 Ga implies that the microcontinental nuclei were coupled with lithospheric roots, which were sufficiently thick and cool to reach the diamond stability field [Helmstaedt, 2013]. The closeness of these dates to the ~2.9 Ga age of the Salma eclogites raises a question whether this is coincidence with or evidence for the onset of plate-tectonically driven regime of crustal evolution?…”

Section: Subduction-related Modification Of the Subcontinental Lithosmentioning

confidence: 99%

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Secular Changes in Relationships Between Plate-Tectonic and Mantle-Plume Engendered Processes During Precambrian Time

Mints¹,

Eriksson²

2016

Geodin. tektonofiz.

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Paradoxically, the lists of "proxies" of both plate-and plume-related settings are devoid of even a mention of the high-grade metamorphic rocks (granulite, amphibolite and high-temperature eclogite facies). However, the granulite-gneiss belts and areas which contain these rocks, have a regional distribution in both the Precambrian and the Phanerozoic records. The origin and evolution of the granulite-gneiss belts correspond to the activity of plumes expressed in vigorous heating of the continental crust; intraplate magmatism; formation of rift depressions filled with sediments, juvenile lavas, and pyroclastic flow deposits; and metamorphism of lower and middle crustal complexes under conditions of granulite and high-temperature amphibolite facies that spreads over the fill of rift depressions also. Granulite-gneiss complexes of the East European Craton form one of the main components of the large oval intracontinental tectonic terranes of regional or continental rank. Inclusion of the granulite-gneiss complexes from Eastern Europe, North and South America, Africa, India, China and Australia in discussion of the problem indicated in the title to this paper, suggests consideration of a significant change in existing views on the relations between the plate-and plume-tectonic processes in geological history, as well as in supercontinent assembly and decay. The East European and North American cratons are fragments of the long-lived supercontinent Lauroscandia. After its appearance at ~2.8 Ga, the crust of this supercontinent evolved under the influence of the sequence of powerful mantle plumes (superplumes) up to ~0.85 Ga. During this time Lauroscandia was subjected to rifting, partial breakup and the following reconstruction of the continent. The processes of plate-tectonic type (rifting with the transition to spreading and closing of the short-lived ocean with subduction) within Lauroscandia were controlled by the superplumes. Revision of the nature of the granulite-gneiss complexes has led to a fundamental new understanding of: a more important role than envisaged previously for mantle-plume processes in the juvenile additions to the continental crust, especially during the Neoarchaean-Proterozoic; the existence of the supercontinent Lauroscandia from ~2.80 to 0.85 Ga; the leading role of mantle plumes in the interaction of plate-and plume-tectonics in the Neoarchaean-Proterozoic history of Lauroscandia and perhaps of the continental crust as a whole. We propose that the evolution of the geodynamic settings of the Earth's crust origin can be represented as a spiral sequence: the interaction of mantle-plume processes and embryonic microplate tectonics during the Palaeo-Mezoarchaean (~3.8-2.8 Ga) → plume-tectonics and local plume-driven plate-tectonics (~2.80-0.55 Ga) → Phanerozoic plate tectonics along with a reduced role of mantle plumes. Recommended by E.V. SklyarovFor citation: Mints M.V., Eriksson P.G. 2016. Secular changes in relationships between plate-tectonic and mantle-plume engendered processes during Pr...

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Section: Subduction-related Modification Of the Subcontinental Lithosmentioning

confidence: 99%

Section: Subduction-related Modification Of the Subcontinental Lithosmentioning

confidence: 99%

Secular Changes in Relationships Between Plate-Tectonic and Mantle-Plume Engendered Processes During Precambrian Time

Mints¹,

Eriksson²

2016

Geodin. tektonofiz.

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show abstract

“…Результаты оригинальных независимых исследований [8, 9 и др.] и сопоставление эклогитов Салмы и других регионов [10,11] подтверждают наши выводы об их природе и условиях формирования, но расходятся относительно времени субдукции -то есть времени UHP-метаморфизма.…”

Section: Introductionunclassified

Study of eclogites from the Belomorian province by using of modern analytical methods

Konilov¹,

Pozhilenko²,

Ван³

et al. 2018

ChemTS

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Origin of V. Grib pipe eclogites (Arkhangelsk region, NW Russia): geochemistry, Sm-Nd and Rb-Sr isotopes and relation to regional Precambrian tectonics

et al. 2019

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Tectonic Relationships Between E-Type Cratonic and Ultra-High-Pressure (UHP) Diamond: Implications for Craton Formation and Stabilization

Cited by 4 publications

References 75 publications

Secular Changes in Relationships Between Plate-Tectonic and Mantle-Plume Engendered Processes During Precambrian Time

Secular Changes in Relationships Between Plate-Tectonic and Mantle-Plume Engendered Processes During Precambrian Time

Study of eclogites from the Belomorian province by using of modern analytical methods

Origin of V. Grib pipe eclogites (Arkhangelsk region, NW Russia): geochemistry, Sm-Nd and Rb-Sr isotopes and relation to regional Precambrian tectonics

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