The Open University's repository of research publications and other research outputs Late Cretaceous (81Ma) high-temperature metamorphism in the southeastern Lhasa terrane: implication for the Neo-Tethys ocean ridge subduction. (2013). Late Cretaceous (81Ma) high-temperature metamorphism in the southeastern Lhasa terrane: implication for the Neo-Tethys ocean ridge subduction. Tectonophysics, 60...

The Sundaland core of SE Asia is a heterogeneous assemblage of Tethyan sutures and Gondwana fragments. Its complex basement structure was one major influence on Cenozoic tectonics; the rifting history of the north Australian margin was another. Fragments that rifted from Australia in the Jurassic collided with Sundaland in the Cretaceous and terminated subduction. From 90 to 45 Ma Sundaland was...

Regional metamorphism occurs in plate boundary zones. Accretionary orogenic systems form at subduction boundaries in the absence of continent collision, whereas collisional orogenic systems form where ocean basins close and subduction steps back and flips (arc collisions), simply steps back and continues with the same polarity (block and terrane collisions) or ultimately ceases (continental col...

Competing hypotheses have been proposed to explain the subduction polarity of Bangong-Nujiang Tethyan Ocean and formation high-conductivity anomaly beneath Qiangtang terrane. However, lithospheric architecture northern Tibetan Plateau is still poorly understood due inhospitable environments topography. Therefore, in winter 2021, a 440 km long, SN-trending broadband magnetotelluric (MT) profile ...

The Capitanian (Late Guadalupian) Maokou Formation at Chaotian in northern Sichuan, South China, is composed mainly of shallow marine shelf carbonates deposited on the Tethyan side of South China. By detailed field mapping and scientific drilling, we newly found out unique fossil assemblages and a sharp lithologic change in the upper part of the Maokou Formation. The main part of the Maokou For...

In the Tethyan realm, leucocratic rocks were recognized as dikes and layers outcropping in ophiolitic of Western Alps, Corsica, Northern Apennines. Several authors have suggested that origin is associated with partial melting cumulate gabbro. Major trace elements composition paragenesis provided information about genetic processes. This research aims at disclosing, for first time, petrographica...

[1] The association between local maxima in the geoid and subduction zones is examined. While it is well known that subduction zones are associated with broad local maxima in the geoid at spherical harmonic degrees 4–9, there is an impressive correlation between back arc geoid maxima at the 5000 km length scale (i.e., spherical harmonic degrees >9) and subduction zones with the exception of the...