Noun1.plutonic rock- large mass of intrusive igneous rock believed to have solidified deep within the earth batholite,batholith,pluton granite- plutonic igneous rock having visibly crystalline texture; generally composed of feldspar and mica and quartz ...
The Tynong pluton, its mafic synplutonic sheets and igneous microgranular enclaves:the nature of the mantle connection in I-type granitic magmas. Clemens, J.D,Regmi, K,Nicholls, I.A,Weinberg, R,Maas, R. Contributions to Mineralogy and Petrology . 2016...
Nothing gets subducted there, but the granite rock is pushed both down and up by the force of the collision, as is happening right now where India, which used to be an island, meets Asia. Silicacious magmas are more viscous than mafic ones. The vents, pipes, and dikes (cracks in ...
mafic magmasvolcano-plutonic complexVariscan igneous activitymagma pulseswhole rock geochemistryphosphoruspetrogenesisKrušné hory/ErzgebirgeGranites of the eastern part of the Kru n茅 hory/Erzgebirge (Czech Republic/Germany) outcrop in separate minor stocks formed by Late Palaeozoic CaO-rich biotite ...
The following are treated: granitoids and related rocks, ultramafic and gabbroic rocks, charnockitic rocks, feldspathoidal rocks. A color index is used to distinguish the leuco- and mela-types of each rock group in comparison with normal types. 展开 ...
olivine or orthopyroxene yield two trends: one is deflned by Mg-rich bulk compositions and is interpreted to represent fractional crystallization in the magma ocean; the other (constant An in plagioclase for a range of 0.25 in Mgl(Mg+Fe) of coexisting mafic mineralsl is defined by ...
For this study, we selected representative samples of mafic and felsic igneous rocks, and metasedimentary rocks. Nine amphibolite facies metadacites from the Rio Capim belt and eight felsic dykes intrusive into the Uauá block were dated by the whole-rock Pb–Pb isochron technique, whereas one...
Basaltic to basaltic andesitic volcaniclastic rocks and their contemporaneous mafic-ultramafic intrusive complexes delineate a Middle Jurassic arc terrane ... JAMES,E.,WRIGHT$MARK,... - 《Gsa Bulletin》 被引量: 81发表: 1988年 Geochronology of igneous and metamorphic rocks in the New Guinea Highlan...
Some potassic igneous rocks may be explained by low-degree partial melting of an enriched mafic source, a mechanism that may be especially appli- cable where Nd and Hf isotopes suggest a relatively juvenile source. However, this mechanism does not seem able to explain production of large amount...
Ultramafic bodies in the Kotaki area of the Hida Marginal Belt are composed of Paleozoic ophiolites and Paleozoic-Mesozoic sediments. The ultramafic rocks ... R Ottosen - 《Journal of the Geological Society of Japan》 被引量: 0发表: 2009年 加载更多来源...