HYBRID ACCRETIONARY/COLLISIONAL
MECHANISM OF PALEOZOIC ASIAN
CONTINENTAL GROWTH: NEW PLATE
TECTONIC PERSPECTIVE

Karel Schulmann, Min Sun, Ondrej Lexa, Alexandra Guy, Vojtech Janoušek, Yingde Jiang, Pavla Štípská

► To cite this version:

Karel Schulmann, Min Sun, Ondrej Lexa, Alexandra Guy, Vojtech Janoušek, et al. HYBRID ACCRETIONARY/COLLISIONAL MECHANISM OF PALEOZOIC ASIAN CONTINENTAL GROWTH: NEW PLATE TECTONIC PERSPECTIVE. Geodynamics & Tectonophysics, 2017, 8 (3), pp.551 - 552. 10.5800/GT-2017-8-3-0288. hal-01896716

HAL Id: hal-01896716

https://hal.science/hal-01896716v1

Submitted on 22 Jul 2025

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HYBRID ACCRETIONARY/COLLISIONAL MECHANISM OF PALEOZOIC ASIAN CONTINENTAL GROWTH: NEW PLATE TECTONIC PERSPECTIVE

Karel Schulmann<fnref n="1" />, <fnref n="2" />, Min Sun<fnref n="3" />, Ondrej Lexa<fnref n="4" />, Alexandra Guy<fnref n="1" />, Vojtech Janoušek<fnref n="1" />, Yingde Jiang<fnref n="5" />, Pavla Štípská<fnref n="1" />, <fnref n="2" />

**For citation:** Schulmann K., Sun M., Lexa O., Guy A., Janousek V., Jiang Y., Štípská P., 2017. Hybrid accretionary/collisional mechanism of Paleozoic Asian continental Growth: new plate tectonic perspective. *Geodynamics & Tectonophysics* 8 (3), 551–552. doi:10.5800/GT-2017-8-3-0288.

Continental crust is formed above subduction zones by well-known process of “juvenile crust growth”. This new crust is in modern Earth assembled into continents by two ways: (i) short-lived collisions of continental blocks with the Laurussian or later Eurasian continent along the “Alpine Himalayan collisional/interior orogens” in the heart of the Pangean continental plates realm; and (ii) long lived lateral accretion of ocean-floor fragments along “circum-Pacific accretionary/peripheral orogens” at the border of the Pale-Pacific and modern Pacific oceanic plate. This configu-

ration has existed since the late Proterozoic, when the giant accretionary Terra Australis orogen developed at periphery of an old Palaeo-Pacific ocean together with collisional Caledonian and Variscan orogens in the interior of Pangean realm. At the same time, the large (ca. 9 millions km<fnref n="2" />) Central Asian Orogenic Belt (CAOB) developed in the NE part of the Pangea. This orogen reveals features of both peripheral and interior orogens, which implies that the generally accepted “peripheral–accretionary” and “interior– collisional” paradigm is not applicable here. To solve this conundrum a

<footnote n="1">¹Center of Lithospheric Research, Czech Geological Survey, 11821 Praha 1, Czech Republic</footnote>

<footnote n="2">²Institut de Physique du Globe de Strasbourg UMR7516, École et observatoire des sciences de la terre, Université de Strasbourg, Strasbourg, France</footnote>

<footnote n="3">³Department of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong</footnote>

<footnote n="4">⁴Institute of Petrology and Structural Geology, Charles University, 12843 Praha 2, Czech Republic</footnote>

<footnote n="5">⁵State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China</footnote>
new model of unprecedented Phanerozoic continental
growth is proposed involving concept of the CAOB
precursor represented by the interface of old exterior
and young interior oceans. New lithospheric domain
orginates along this interface show hybrid features be-
tween continental and oceanic plates and specific heat
and rheology structure. We present new data from
Mongolian collage to provide a new model of long

lasting Pacific type accretion characterized by several
advancing and retreat subduction events related to
formation and outboard migration of magmatic arc and
giant sedimentary wedge over period of 300 Ma. This
event is supported by continuous evolution of Hf and
Nd isotopic trends as well as recurrent melting of both
juvenile and old continental crust.