Volcanic vs Plutonic Hornblende: Tools for Discerning Crystal Accumulation and Melt Loss K. WERTS, C.G. BARNES, V. MEMETI, S. PATERSON, B. RATSCHBACHER, D. WILLIAMS Texas Tech University, Lubbock, TX, 79409, USA (*correspondence: kevin.werts@ttu.edu, cal.barnes@ttu.edu) Cal State Full...
In the Kyrgyz part of the MTS, volcanic and plutonic rocks extend in a north–south direction from the contact with the North Tianshan (NTS) to the South Tianshan blocks (STS) and overlie and intrude Precambrian igneous and metamorphic units of the MTS, including the telescoped units in the...
Igneous petrogenesis and tectonic setting of plutonic and volcanic rocks of the Cordillera de...Presents a petrologic description and petrogenetic interpretation of the plutonic and volcanic rocks of the Cordillera de Talamanca in Costa Rica and Panama. Exposure of the Late Miocene Talamanca Intrusive ...
Box Table 1 | Overview of igneous rock classifications Classification of volcanic rocks based on silica content. The solidus and liquidus temperatures are reported values for the Earth’s surface at 1 bar Classification Common Solidified Extrusive Rock Solidified Plutonic (Intrusive) Rock Volcanic Feat...
The Rio Capim volcanic–plutonic–sedimentary belt lies in sharp tectonic contact with Archaean rocks of the Uauá block in the northern part of the São Francisco craton. Field relationships and high-precision geochronology indicated that the Rio Capim basalts, gabbros, diorites, and dacites ...
Coleman, D. S., Bartley, J. M., Glazner, A. F. & Pardue, M. J. Is chemical zonation in plutonic rocks driven by changes in source magma composition or shallow-crustal differentiation?Geosphere8, 1568 (2012). ArticleGoogle Scholar ...
Additionally, plagioclase comb layering and orbicular rocks showing similar growth conditions as plagioclase glomerocrysts, imply that certain types of vertical, plutonic layering might form on volcanic timescales. CRediT authorship contribution statement A.Mc. and J.B. designed the research. P.V. ...
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...
The crest of this Syntaxis is exposed further north in southern Tibet where the Indus Tsangpo Suture Zone and the Trans Himalaya plutonic belt wrap around Namche- Barwa peak area (Burg et al., 1997). Intensity of metamorphism increases gradually from low grade of greenschist facies in the ...
rocks deposited in a post-tectonic extensional setting proximal to the St. Lawrence granite (SLG), a Devonian pluton associated with a prominent vein-type fluorite mineralization. The volcanic rocks are alkali rhyolites, which are weakly peraluminous and exhibit geochemical characteristics of A-type ...