Mathematical modeling of overthrusting fault as a cause of andalusite-kyanite metamorphic zoning in the Yenisei Ridge

Korobeinikov, S. N.; Polyansky, O. P.; Лиханов, И. И.; Sverdlova, V. G.; Ревердатто, В. В.

doi:10.1134/s1028334x06040325

Cited by 30 publications

(2 citation statements)

References 3 publications

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“…This is a typical feature of collision metamorphism associated with the overthrusting of continental crustal blocks lacking a relationship to subduction . The occurrence of this process was justified within the framework of the crustal tectonic thickening model via rapid overthrusting and subsequent rapid uplifting and erosion (Likhanov et al, 2008;Korobeinikov et al, 2006). The analysis of our results with regard to the northeastern dips of the overthrusts allowed us to consider the medium-pressure kyanite-bearing metapelites as products of collision metamorphism, which were formed by the unidirectional obduction of the Yenisey Ridge by ancient rock blocks of the Siberian craton.…”

Section: Mineral Chemistry and P-t Conditions Of Metamorphismmentioning

confidence: 93%

Precambrian Fe- and Al-Rich Pelites from the Yenisey Ridge, Siberia: Geochemical Signatures for Protolith Origin and Evolution during Metamorphism

Лиханов

Ревердатто

2008

International Geology Review

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In the Trans-Angarian region of the Yenisey Ridge in eastern Siberia (Russia), Fe-and Al-rich low-pressure, andalusite-bearing pelitic schists of the Teya Sequence were subjected to prograde pressure increase in the vicinity of the thrust and were overprinted by medium-pressure, kyaniteand sillimanite-bearing assemblages and microtextures of collisional metamorphism. Major, trace, and rare-earth element contents of rock samples from the different metamorphic zones were determined in order to examine the composition, nature, and evolution of their protolith during metamorphism. Results indicate that these rocks are the redeposited and metamorphosed products of Precambrian kaolinitic weathering crusts. The protolith of the Teya Sequence metapelites was produced by erosion of post-Archean granitoid rocks, which accumulated under humid conditions in shallow-water basins along the continental margin. These results agree with lithofacies data and with the geodynamic reconstruction of the Precambrian evolution of the Yenisey Ridge. Geochemical and petrological data coupled with a mass balance analysis show that the coherent mobility of REEs during collisional metamorphism may be attributed both to mineral reactions responsible for modal changes and to local chemical heterogeneity inherited from the initial protolith, with the prevalence of one or another process at different stages of rock evolution.

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Section: Mineral Chemistry and P-t Conditions Of Metamorphismmentioning

confidence: 93%

Precambrian Fe- and Al-Rich Pelites from the Yenisey Ridge, Siberia: Geochemical Signatures for Protolith Origin and Evolution during Metamorphism

Лиханов

Ревердатто

2008

International Geology Review

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“…In addition, P-T path calculations for rocks from Zone III indicate that these highest-grade rocks underwent an equally steep burial P-T path towards their peak conditions. The occurrence of this event was justified within the framework of the crustal tectonic thickening model via rapid overthrusting and subsequent rapid uplifting and erosion (Korobeinikov et al 2006;Likhanov et al 2008a). Compared to rocks from other regions of the Transangarian part of the Yenisey Ridge, metapelites of the Chapa area yield higher P-T parameters (in the sillimanite stability field).…”

Section: Brief Description Of the Angara Mayakon And Chapa Areasmentioning

confidence: 99%

Neoproterozoic collisional metamorphism in overthrust terranes of the Trans-Angarian Yenisey Ridge, Siberia

Лиханов¹,

Ревердатто

2009

International Geology Review

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Four polymetamorphic complexes in the vicinity of regional faults in the Trans-Angarian region of the Yenisey Ridge were studied to determine their metamorphic evolution and to elucidate distinctive features of the regional geodynamic processes. Based on our geological and petrological studies using geothermobarometry and P-T path calculations, we show that a Neoproterozoic medium-pressure metamorphism of the kyanite-sillimanite type at c. 850 Ma overprinted regionally metamorphosed lowpressure andalusite-bearing rocks. A positive correlation between rock ages and P-T estimates for the kyanite-sillimanite metamorphism provides evidence for regional structural and tectonic heterogeneity. The medium-pressure recrystallization was characterized by (1) localized distribution of metamorphic zones in the area directly underlying thrust faults with a measured thickness of 2.5-8 km;(2) syntectonic formation of kyanite-bearing mineral assemblages related to thrusting; (3) gradual increase in metamorphic pressure towards the thrust faults associated with a low metamorphic field gradient (from 1-7 to 12°C/km); and (4) equally steep burial P-T paths recorded for the highest grade rocks. These specific features are typical of collisional metamorphism during overthrusting of continental blocks and are evidence of near-isothermal loading in accordance with the transient emplacement of thrust sheets. The proposed model for tectono-metamorphic evolution of the study areas due to crustal thickening at high thrusting rates and subsequent rapid exhumation explains these tectonic features. Data analysis allowed us to consider the medium-pressure kyanite-bearing metapelites as a product of collisional metamorphism, reflecting unidirectional thrusting of Siberian cratonal blocks onto Yenisey Ridge along regional deep faults (Angara, Mayakon, and Chapa areas) and by opposite movements in the zone of secondary splay faults (Garevka area).

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Causes, Geodynamic Factors and Models of Metamorphism

Ревердатто

Лиханов

Polyansky

et al. 2018

The Nature and Models of Metamorphism

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Mathematical modeling of overthrusting fault as a cause of andalusite-kyanite metamorphic zoning in the Yenisei Ridge

Cited by 30 publications

References 3 publications

Precambrian Fe- and Al-Rich Pelites from the Yenisey Ridge, Siberia: Geochemical Signatures for Protolith Origin and Evolution during Metamorphism

Precambrian Fe- and Al-Rich Pelites from the Yenisey Ridge, Siberia: Geochemical Signatures for Protolith Origin and Evolution during Metamorphism

Neoproterozoic collisional metamorphism in overthrust terranes of the Trans-Angarian Yenisey Ridge, Siberia

Causes, Geodynamic Factors and Models of Metamorphism

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