Magmatic and Tectonic Setting of Archean Granitoids in the Southeastern Singhbhum Craton, India: Developing constraints with major and trace element geochemistry and geochronology

2020 ◽  
Vol 22 ◽  
Author(s):  
Claudia Banks
Keyword(s):  
Trace Element ◽  
Genetic Relationships ◽  
Tectonic Setting ◽  
Trace Element Geochemistry ◽  
Element Geochemistry ◽  
Peninsular India ◽  
Singhbhum Craton ◽  
Rock Types ◽  
Granite Emplacement ◽  
Singhbhum Granite

The Singhbhum craton is one of five Archean nuclei comprising Peninsular India. It is a composite Archean block that includes the Older Metamorphic Group, the Older Metamorphic Tonalite Gneisses, the Singhbhum Granite, and the Iron Ore Group as its major units. The ages of these components range from ~3.5 to ~3.1 Ga, although overlapping ages and similar rock types confound their genetic relationships. Plutonic felsic rocks from the southeastern Singhbhum craton (BK1: a foliated tonalite, KP1: a non-foliated granite, and SG14: a non-foliated granite) yield U-Pb (zircon) ages of 3321 ± 2 Ma (BK1), 3301 ± 1 Ma (KP1), and  3261 ± 1 Ma (SG14) that coincide with a pulse of Singhbhum Granite emplacement at 3.27 to 3.33 Ga. REE patterns and tectonic discrimination diagrams based on major and trace element ratios suggest a subduction zone setting for these rocks. We report major and trace element data for and compare them to previous works in order to characterize the Archean felsic plutonic history of the craton.

Tectonic setting of the plutonic belts of Yakutia, northeast Russia, based on 40Ar/39Ar geochronology and trace element geochemistry

Geology ◽  
2001 ◽  
Vol 29 (2) ◽  
pp. 167 ◽  
Author(s):  
Paul W. Layer ◽  
Rainer Newberry ◽  
Kazuya Fujita ◽  
Leonid Parfenov ◽  
Vera Trunilina ◽  
...  
Keyword(s):  
Trace Element ◽  
Tectonic Setting ◽  
Trace Element Geochemistry ◽  
Element Geochemistry ◽  
Northeast Russia

Trace element geochemistry of the Sokoman Iron Formation

1977 ◽  
Vol 14 (7) ◽  
pp. 1598-1610 ◽  
Author(s):  
B. J. Fryer
Keyword(s):  
Trace Element ◽  
Sea Water ◽  
Iron Formation ◽  
Trace Element Geochemistry ◽  
Element Geochemistry ◽  
Element Abundances ◽  
Rock Types ◽  
Show Evidence ◽  
Trace Element Contents ◽  
Element Contents

Rare earth and other trace element data are presented for samples of the Sokoman Iron Formation, Labrador, and its associated sediments. The results show that the slates associated with the iron formation are typical in trace element contents compared to other argillaceous sediments except for the large Eu depletion characteristic of slates of their age. The iron formation, however, is fundamentally different in its trace element concentrations and patterns from those of the associated rocks. It is relatively enriched in the heavy REE and Eu and both the REE and Co, Cr, Sc, and Th concentrations bear no relationship to those of the slates and the dolomite.Trace element analyses of the various textural and mineralogic rock types in all cases substantiate the genetic conclusions of earlier workers based on field and petrographic observations. Silicate–carbonate facies samples show constant REE, Co, Sc, and Th distributions which are compatible with an origin as crystalline precipitates in equilibrium with sea water. Riebeckite-bearing iron formation is distinctive in that it reflects contamination by ordinary clastic material and (or) metamorphic solutions. Oxide facies rocks exhibit widely variable trace element abundances as is to be expected for rocks whose original trace element contents were controlled by adsorption processes. A group of iron-enriched oxide facies rocks show evidence of important heavy REE complexing associated with the migration of iron during diagenesis. Minor Ce anomalies in all facies of Sokoman Iron Formation indicate that oxidation of Ce to the +4 state was taking place at the time of iron deposition but probably not in close proximity to it.

scholarly journals Petrogenetic interpretation of granitoid rocks using multicationic parameters in the Sanggau Area, Kalimantan Island, Indonesia

2015 ◽  
Vol 3 (1) ◽  
Author(s):  
Kyaw Linn Zaw ◽  
Lucas Donny Setijadji ◽  
I Wayan Warmada ◽  
Koichiro Watanabe
Keyword(s):  
Trace Element ◽  
Tectonic Setting ◽  
Island Arc ◽  
Trace Element Geochemistry ◽  
Granitoid Rock ◽  
Calc Alkaline ◽  
Element Geochemistry ◽  
Alkaline Magma ◽  
Crystallization Differentiation ◽  
Granitoid Rocks

Granitoid rock compositions from a range of tectonic environments are plotted on a multicationic diagram, based on major and trace element geochemistry and K-Ar dating. This shows that there is a different tectonic nature, rock affinity and suites. The basement granitoid rocks are ranging from diorite to granite composition. They appear to the products of crystallization differentiation of a calc-alkaline magma of island affinity and range to metaluminous granites, granodiorite and tonalite. The tectonic setting has two kinds which are subduction and post-subduction. The geochemical interpretation, origin and melting of mechanism and tectonic setting shows the types of granitoid are M and I-M type. The basement of granite and granodiorite are a segment of island arc that were happened the Sintang Intrusion as post subduction or syn-collision tectonic setting. Keywords: Petrogenetic, tectonic, affinity, Sintang Intrusion, Kalimantan

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