High potassic volcanism and northern Tibetan uplift constrained by west collision

1998 ◽  
Vol 43 (S1) ◽  
pp. 80-80
Author(s):  
J. Q. Liu ◽  
ZH. F. Guo
Keyword(s):  
Potassic Volcanism

Quaternary sodic and potassic intraplate volcanism in northeast China controlled by the underlying heterogeneous lithospheric structures

Geology ◽  
2021 ◽  
Author(s):  
Xingli Fan ◽  
Qi-Fu Chen ◽  
Yinshuang Ai ◽  
Ling Chen ◽  
Mingming Jiang ◽  
...  
Keyword(s):  
Upper Mantle ◽  
Lithospheric Mantle ◽  
Northeast China ◽  
Velocity Structure ◽  
Seismic Velocity ◽  
Subcontinental Lithospheric Mantle ◽  
Seismic Velocities ◽  
S Wave ◽  
Crust And Upper Mantle ◽  
Potassic Volcanism

The origin and mantle dynamics of the Quaternary intraplate sodic and potassic volcanism in northeast China have long been intensely debated. We present a high-resolution, three-dimensional (3-D) crust and upper-mantle S-wave velocity (Vs) model of northeast China by combining ambient noise and earthquake two-plane wave tomography based on unprecedented regional dense seismic arrays. Our seismic images highlight a strong correlation between the basalt geochemistry and upper-mantle seismic velocity structure: Sodic volcanoes are all characterized by prominent low seismic velocities in the uppermost mantle, while potassic volcanoes still possess a normal but thin upper-mantle “lid” depicted by high seismic velocities. Combined with previous petrological and geochemical research findings, we propose that the rarely erupted Quaternary potassic volcanism in northeast China results from the interaction between asthenospheric low-degree melts and the overlying subcontinental lithospheric mantle. In contrast, the more widespread Quaternary sodic volcanism in this region is predominantly sourced from the upwelling asthenosphere without significant overprinting from the subcontinental lithospheric mantle.

Potassic volcanism in Central Java and South Sulawesi, Indonesia

1990 ◽  
Vol 4 (3) ◽  
pp. 171-187 ◽  
Author(s):  
J. Leterrier ◽  
Y.S. Yuwono ◽  
R. Soeria-Atmadja ◽  
R.C. Maury
Keyword(s):  
Central Java ◽  
South Sulawesi ◽  
Potassic Volcanism

Early Triassic potassic volcanism in the Afyon Zone of the Anatolides/Turkey: implications for the rifting of the Neo-Tethys

2011 ◽  
Vol 101 (1) ◽  
pp. 177-194 ◽  
Author(s):  
Cüneyt Akal ◽  
Osman Candan ◽  
O. Ersin Koralay ◽  
Roland Oberhänsli ◽  
Fukun Chen ◽  
...  
Keyword(s):  
Early Triassic ◽  
Potassic Volcanism

scholarly journals A short, sharp pulse of potassium-rich volcanism during continental collision and subduction

Geology ◽  
2019 ◽  
Vol 47 (11) ◽  
pp. 1079-1082 ◽  
Author(s):  
M.R. Palmer ◽  
E.Y. Ersoy ◽  
C. Akal ◽  
İ. Uysal ◽  
Ş.C. Genç ◽  
...  
Keyword(s):  
High Pressure ◽  
Isotope Composition ◽  
Volcanic Rocks ◽  
Continental Collision ◽  
Western Anatolia ◽  
Slab Rollback ◽  
Tectonic Zones ◽  
Geochemical Indices ◽  
Partial Melts ◽  
Potassic Volcanism

Abstract Potassic volcanic rocks are characteristic of collisional tectonic zones, with recycling of continental crust playing an important role in their generation. Potassium-rich partial melts and/or fluids derived from subducted continental material initiate and/or mix with mantle-derived melts and then erupt at the surface with varying degrees of interaction with the overlying lithosphere. The details of how continental material incorporates into mantle melts are, however, uncertain. In particular, the depths from which the potassium-rich fluids and/or melts are released from the continental material and then react with the mantle-derived melts remain a subject of debate. We have measured the boron isotope composition of volcanic rocks from Western Anatolia (Turkey) that erupted between 52 and 0.1 Ma, and span the lifetime of collisional events from initial arc-type eruptions to post-collisional volcanism. These data and other geochemical indices show that ultrapotassic volcanism was mainly confined to a narrow window between ca. 20 and 15 Ma, consistent with recycling of high-pressure phengite, with the timing of the potassic volcanism coincident with slab rollback and breakoff.

scholarly journals Late Miocene to Pleistocene potassic volcanism in the Republic of Macedonia

2008 ◽  
Vol 94 (1-2) ◽  
pp. 45-60 ◽  
Author(s):  
Yotzo Yanev ◽  
Blazo Boev ◽  
Carlo Doglioni ◽  
Fabrizio Innocenti ◽  
Piero Manetti ◽  
...  
Keyword(s):  
Late Miocene ◽  
Republic Of Macedonia ◽  
The Republic ◽  
Potassic Volcanism

Age and extent of potassic volcanism on the Colorado Plateau

1979 ◽  
Vol 43 (2) ◽  
pp. 279-284 ◽  
Author(s):  
Michael F. Roden ◽  
Douglas Smith ◽  
Fred W. McDowell
Keyword(s):  
Colorado Plateau ◽  
Potassic Volcanism

scholarly journals Lithospheric foundering and underthrusting imaged beneath Tibet

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Min Chen ◽  
Fenglin Niu ◽  
Jeroen Tromp ◽  
Adrian Lenardic ◽  
Cin-Ty A. Lee ◽  
...  
Keyword(s):  
Upper Mantle ◽  
Wave Speed ◽  
The Tibetan Plateau ◽  
Uppermost Mantle ◽  
Southern Tibet ◽  
Surface Uplift ◽  
South Central ◽  
Plateau Uplift ◽  
Central Tibet ◽  
Potassic Volcanism

Abstract Long-standing debates exist over the timing and mechanism of uplift of the Tibetan Plateau and, more specifically, over the connection between lithospheric evolution and surface expressions of plateau uplift and volcanism. Here we show a T-shaped high wave speed structure in our new tomographic model beneath South-Central Tibet, interpreted as an upper-mantle remnant from earlier lithospheric foundering. Its spatial correlation with ultrapotassic and adakitic magmatism supports the hypothesis of convective removal of thickened Tibetan lithosphere causing major uplift of Southern Tibet during the Oligocene. Lithospheric foundering induces an asthenospheric drag force, which drives continued underthrusting of the Indian continental lithosphere and shortening and thickening of the Northern Tibetan lithosphere. Surface uplift of Northern Tibet is subject to more recent asthenospheric upwelling and thermal erosion of thickened lithosphere, which is spatially consistent with recent potassic volcanism and an imaged narrow low wave speed zone in the uppermost mantle.

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