Originally, some people thought that all rocks were neptunian. When it was demonstrated that volcanic rocks came from volcanoes, there was at first a struggle over whether rocks like granite were neptunian or volcanic. It turned out that they were neither. Granite is plutonic. This leaves ...
Overall, the analysis shows little evidence for a complementary relationship between typical volcanic and plutonic rocks in which plutons represent unerupted cumulate residues from differentiating magma systems; rather, pluton compositions are dominantly equivalent to those of volcanic rocks. However, subtle...
Volcanic and plutonic rocks often show textural and petrological evidence on mixing of magmas with different chemical composition and temperature. Several experimental studies have been performed to reproduce textures found in natural ro... C Komamiya,S Okumura,M Nakamura - 《Japan Geoscience Union》 ...
1998 . U-Pb ages of plutonic and volcanic rocks in the Svecofennian Bothnian Basin, central Sweden, and their implications for the Palaeoproterozoic evolution of the basin, GFF , 120, (4), 357–363. [Taylor & Francis Online]Lundqvist, T., M. Vaasjoki, and P.-O. Persson, 1998, U-...
Plutonic rocks of intermediate composition on Gran Canaria: the missing link of the bimodal volcanic rock suite 来自 掌桥科研 喜欢 0 阅读量: 32 作者: B Freundtmalecha 摘要: Analysis of abundant plutonic fragments in the voluminous Miocene rhyolitic–basaltic composite ignimbrite P1, the initial ...
1966. K-Ar dating of plutonic and volcanic rocks in orogenic belts. In Potassium-Argon Dating, ed. OA Schaeffer, J Za¨hringer, pp. 117-33. Berlin: Springer-VerlagArmstrong RL (1966) K-Ar dating of plutonic and volcanic rocks in orogenic belts. In: Schaeffer OA, Zahringer J (eds) ...
Freundt-Malecha B, Schmincke H-U, Freundt A (2001) Plutonic rocks of intermediate composition on Gran Canaria: the missing link of the bimodal volcanic rock suite. Contrib Mineral Petrol 141:430-445Freundt-Malecha, B., Schmincke, H.U. & Freundt, A. (2001). Plutonic rocks of intermediate ...
, et al. ( 1995 ), Igneous petrogenesis and tectonic setting of Plutonic and volcanic rocks of the Cordillera de Talamanca, Costa Rica—Panama, Central American Arc , Am. J. Sci. , 295 , 875 – 919 .Drummond, M. S. , M. Bordelon , J. Z. de Boer , M. J. Defant , H. ...
This belt (Fig. 3) is a relatively small, 4-km wide on its southern and northern tips, and about 10-km wide on the larger central region, 20-km long, N-, to NW-trending belt of deformed and metamorphosed mafic to felsic volcanic rocks and associated sedimentary rocks, intruded by seve...
These rocks imply the presence of an already differentiated felsic crust at >3.5 Ga, which has Nd and Hf model ages indicating mantle extraction ages extending back to the Eoarchaean. The combined record of plutonic and volcanic rocks of the Kaapvaal craton provides a more complex scenario than...