Estimation of the primary magma compositions of an igneous rock series petrogenetically associated with fractional crystallization with special reference to element abundance relationships

1994 ◽  
Vol 13 (3) ◽  
pp. 212-222
Author(s):  
Wang Yunliang ◽  
Zhang Wanlin ◽  
He Wentong ◽  
Zhang Nai
Keyword(s):  
Special Reference ◽  
Fractional Crystallization ◽  
Igneous Rock ◽  
Primary Magma ◽  
Element Abundance ◽  
Rock Series ◽  
Magma Compositions

Igneous Rock-Series and Mixed Igneous Rocks

1900 ◽  
Vol 8 (5) ◽  
pp. 389-399 ◽  
Author(s):  
Alfred Harker
Keyword(s):  
Igneous Rock ◽  
Igneous Rocks ◽  
Rock Series

1986 Values for Fifteen GSJ Rock Reference Samples, “Igneous Rock Series”

1987 ◽  
Vol 11 (2) ◽  
pp. 159-166 ◽  
Author(s):  
Atsushi ANDO ◽  
Naoki MITA ◽  
Shigeru TERASHIMA
Keyword(s):  
Igneous Rock ◽  
Rock Series ◽  
Reference Samples

Classification of Igneous Rock Series

1931 ◽  
Vol 39 (1) ◽  
pp. 54-67 ◽  
Author(s):  
M. A. Peacock
Keyword(s):  
Igneous Rock ◽  
Rock Series

The Petrogenesis of a Spilitic Rock Series from New Zealand

1956 ◽  
Vol 93 (2) ◽  
pp. 89-110 ◽  
Author(s):  
M. H. Battey
Keyword(s):  
New Zealand ◽  
Large Scale ◽  
Primary Magma ◽  
Rock Series ◽  
Tholeiitic Magma ◽  
Influence Of Water ◽  
Differentiation Trend

AbstractWell-preserved examples of spilites show marked affinities with certain tholeiites in texture, chemistry, differentiation trend, and in some aspects of their mineralogy. The presence in them of albite and apparently primary chlorite, in association with unaltered augite, is ascribed to the influence of water as a component of the magma, and the high content of alkali in the basic members to retention of volatile oxides present in tholeiitic magma. Evidence is lacking of large-scale metasomatism by external agencies and the postulate of a special primary magma seems unwarranted. A series may be traced, in rocks of different environments, from “dry tholeiite” to “wet tholeiite” to spilite.Four new rock analyses and one of chlorite are given.

Mugearites and Their Place in Alkali Igneous Rock Series

1961 ◽  
Vol 69 (2) ◽  
pp. 186-203 ◽  
Author(s):  
I. D. Muir ◽  
C. E. Tilley
Keyword(s):  
Igneous Rock ◽  
Rock Series

Permian volcanism in the Mongolian orogenic zone, northeast China: geochemistry, magma sources and petrogenesis

2001 ◽  
Vol 138 (2) ◽  
pp. 101-115 ◽  
Author(s):  
YONGFENG ZHU ◽  
SHIHUA SUN ◽  
LIBING GU ◽  
YOSHIHIDE OGASAWARA ◽  
NENG JIANG ◽  
...  
Keyword(s):  
Fractional Crystallization ◽  
Volcanic Rocks ◽  
Major Elements ◽  
Mantle Metasomatism ◽  
Primary Magma ◽  
Lower Permian ◽  
Depleted Mantle ◽  
Incompatible Trace Elements ◽  
Basic Rocks ◽  
Orogenic Zone

Lower Permian volcanism was the first magmatic activity to occur after the collision events in the Mongolian orogenic zone, east China. The Permian volcanic rocks are therefore a key to understanding the dynamics of the unified continental lithosphere. The volcanic rocks consist of basic and intermediate rocks. The intermediate rocks with high initial 87Sr/86Sr ratios (0.7051 to 0.7052) and low εNd values (−0.73 to −3.57) generally overlie the basic rocks in the field. The basic rocks have relatively low initial 87Sr/86Sr ratios (0.7034 to 0.7051) and high εNd values (2.72 to −0.10). Two parallel Rb–Sr isochrons give almost the same age, about 270 Ma. One consists of the basic rocks giving an initial isochron 87Sr/86Sr ratio of 0.7035. The other consists of the intermediate rocks and one sample of basalt, which give an initial isochron 87Sr/86Sr value of 0.7051. The strong correlations between SiO2 and other major elements suggest that fractional crystallization played an important role in the magmatic processes. However, fractional crystallization cannot explain the geochemistry of most incompatible trace elements and Sr–Nd isotope characteristics. The positive correlation between Th/Nb and (La/Sm)N ratios demonstrates the direct relation between the enrichment of the light rare earth elements and the contamination of continental sediments. The high contents of large ion lithosphere elements (LILE) in the Permian volcanic rocks may suggest an additional ‘crust + fluid’ component, especially in the intermediate rocks, which are highly enriched in Ba (> 400 ppm) relative to the basic rocks (> 200 ppm). We propose that the subduction slab dropped into depleted mantle and released fluid, which induced the mantle metasomatism and LILE enrichment. The metasomatized mantle partially melted and formed the ‘primary’ magma. This primary magma assimilated with the Proterozoic biotite–quartz schist during its rise, and finally formed the Permian volcanic rocks. Magma assimilated with the Proterozoic biotite–quartz schist in small amounts could have produced the basic rocks, while assimilation of larger amounts of magma (because of longer assimilation time) would generate intermediate rocks.

The geochemistry of some igneous rock series

1953 ◽  
Vol 4 (3) ◽  
pp. 105-142 ◽  
Author(s):  
S.R Nockolds ◽  
R Allen
Keyword(s):  
Igneous Rock ◽  
Rock Series
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