Phreatomagmatic explosions in subaqueous volcanism

2003 ◽  
pp. 51-60 ◽  
Author(s):  
Bernd Zimanowski ◽  
Ralf Büttner
Keyword(s):  
Subaqueous Volcanism

Highly vesicular pumice generated by buoyant detachment of magma in subaqueous volcanism

2013 ◽  
Vol 6 (2) ◽  
pp. 129-132 ◽  
Author(s):  
Melissa D. Rotella ◽  
Colin J. N. Wilson ◽  
Simon J. Barker ◽  
Ian C. Wright
Keyword(s):  
Subaqueous Volcanism

scholarly journals Subaqueous volcanism and rock failures in the Oshoro and Shakotan peninsula, Hokkaido

2007 ◽  
Vol 113 (Supplement) ◽  
pp. S93-S102
Author(s):  
Satoshi Okamura ◽  
Hidehisa Nagata
Keyword(s):  
Subaqueous Volcanism

Geochronology and facies analysis of subaqueous volcanism of lower ordovician, Famatinian arc, Argentina

2018 ◽  
Vol 84 ◽  
pp. 255-265 ◽  
Author(s):  
Paula Armas ◽  
Eber A. Cristofolini ◽  
Juan E. Otamendi ◽  
Alina M. Tibaldi ◽  
Matías G. Barzola ◽  
...  
Keyword(s):  
Facies Analysis ◽  
Lower Ordovician ◽  
Subaqueous Volcanism

scholarly journals Setouchi volcanic rocks on Shodo-Shima Island: subaqueous volcanism and sanukitoid

2009 ◽  
Vol 115 (Supplement) ◽  
pp. S15-S20
Author(s):  
Yoshiyuki Tatsumi ◽  
Ken-ichiro Tani ◽  
Hiroshi Kawabata
Keyword(s):  
Volcanic Rocks ◽  
Subaqueous Volcanism

scholarly journals The Pennsylvanian Composite Volcanism in the Bogda Mountains, NW China: Evidence for Postcollisional Rift Basins

Lithosphere ◽  
2020 ◽  
Vol 2020 (1) ◽  
pp. 1-22
Author(s):  
Jialin Wang ◽  
Chaodong Wu ◽  
Zhuang Li ◽  
Tianqi Zhou ◽  
Yanxi Zhou ◽  
...  
Keyword(s):  
Mantle Source ◽  
Volcanic Rocks ◽  
Calc Alkaline ◽  
Rift Basins ◽  
Basaltic Rocks ◽  
High K ◽  
Depleted Mantle ◽  
Subaqueous Volcanism ◽  
Felsic Volcanic ◽  
Felsic Volcanic Rocks

Abstract In this paper, we present new petrological, zircon U–Pb–Hf isotopic, bulk-rock geochemical, and Sr–Nd isotopic data for the rocks from the Pennsylvanian Liushugou and Qijiagou Formations, Bogda Mountains (BMs), northwest China. The new data help in understanding the petrogenesis and geodynamic background of the two formations, further constraining the evolution of BMs during the Pennsylvanian. The eastern Liushugou Formation is composed mainly of bimodal volcanic rocks, while the western Liushugou Formation is dominated by pillow basalts with interstitial limestones, peperites, and pyroclastic rocks. The Qijiagou Formation consists principally of bioclastic limestones, peperites, and volcanic and volcaniclastic rocks with turbidites. Depositional environment analyses of the Liushugou and Qijiagou Formations reveal subaqueous volcanism and a progressively deepening shallow marine environment with times. Zircon LA-ICP-MS U–Pb dating of felsic volcanic rocks from the Liushugou Formation indicates that the subaqueous volcanism occurred at ca. 310–302 Ma, viz., the Pennsylvanian era. The basaltic rocks from the Liushugou and Qijiagou Formations are high-K calc-alkaline, enriched in light rare earth elements and large-ion lithophile elements, and depleted in high-field-strength elements (Nb, Ta, and Ti). The above characteristics, together with their depleted isotopic signature (εNdt=3.0-8.1, εHft=8.0-15.6, and ISr=0.703-0.707), suggest the derivation from a depleted mantle source metasomatized by slab-derived fluids and sediment-derived melts. Most felsic volcanic rocks of the high-K calc-alkaline to shoshonite series from the Liushugou and Qijiagou Formations show features of the A2-type granites and have similar trace and isotopic composition to the basaltic rocks, which were probably generated from the partial melting of juvenile continental crust. Combining the newly acquired data with the regional geology, we propose that the Pennsylvanian volcanic and sedimentary rocks in the BMs were formed in a series of postcollisional rift basins which were related to local strike-slip faulting. Moreover, the volcanic rocks in the east were derived from a relatively deeper mantle source (thick lithosphere) due to their smaller rifting.

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