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

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.

Rb–Sr age and geochemical distinctions between the Carboniferous tin-bearing Davis Lake complex and the Devonian South Mountain batholith, Meguma Terrane, Nova Scotia

1989 ◽  
Vol 26 (10) ◽  
pp. 2044-2061 ◽  
Author(s):  
Jean M. Richardson ◽  
Keith Bell ◽  
John Blenkinsop ◽  
David H. Watkinson
Keyword(s):  
Nova Scotia ◽  
Trace Element ◽  
Biotite Granite ◽  
Granitic Magma ◽  
Trace Element Geochemistry ◽  
Magmatic Differentiation ◽  
Element Geochemistry ◽  
South Mountain Batholith ◽  
Granitoid Rocks ◽  
Meguma Terrane

The Davis Lake complex (DLC), composed of biotite monzogranite, leucomonzogranite, and cassiterite–topaz greisen, hosts the East Kemptville tin mine in southwestern Nova Scotia. The DLC monzogranite contains glomeroporphyritic biotite with ilmenite and many rare-earth-element (REE) bearing accessory minerals, zircon-bearing quartz phenocrysts, and xenoliths of biotite granite. Primary muscovite is rare. Major- and trace-element geochemical trends indicate well-defined, but limited, magmatic differentiation trends. REE patterns of the least-evolved granites are flat and show a Ce/Yb ratio of 10.The DLC was previously considered cogenetic with the Devonian South Mountain batholith (SMB) on the basis of its location, lithologies, and similarities in major- and trace-element geochemistry. However, new Rb–Sr whole-rock isotopic data indicate an Rb–Sr date of 330 ± 7 Ma (mean square of weighted deviates (MSWD) = 2.8) for the DLC, implying that it is at least 35 Ma younger than the SMB. The initial 87Sr/86Sr ratio of 0.727 ± 0.004 is significantly higher than those for other Meguma Terrane granites and is the highest yet reported from Appalachian granitoid rocks. Rb–Sr data from biotite indicate open-system behaviour between 260 and 240 Ma and provide more evidence for previously documented tectonothermal events after 300 Ma in the Meguma Terrane.The peraluminous nature of the DLC, its high Rb/Sr and high 87Sr/86Sr ratios, high P, F, and Sn contents, low Ca and B contents, and high differentiation indices indicate that the complex was derived from a highly evolved felsic source. Geochemical distinctions indicate that the DLC is neither derived from nor cogenetic with the SMB. A more probable source for the DLC magma is a dehydrated felsic granulite from which a previous H2O-, B-, Cl-, and Zn-rich granitic magma (perhaps the SMB) had been extracted. Such a source is analogous to that postulated for A-type granites and topaz rhyolites.The DLC shows more similarities to the "stitching" Carboniferous Appalachian volatile- and metal-rich granites than to Devonian Meguma granites. Unlike most of these Appalachian plutons, which occur marginal to terrane boundaries and were probably crystallized from locally generated, anatectic magmas, the DLC was emplaced in the centre of the most-outboard Meguma Terrane, adjacent to the Tobiatic shear zone.

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

Petrogenesis of a calc-alkaline lamprophyre (minette) from Thanewasna, western Bastar craton, Central India: Insights from mineral, bulk rock and in situ trace element geochemistry

2021 ◽  
pp. SP513-2020-258
Author(s):  
Muduru Lachhana Dora ◽  
Kirtikumar Randive ◽  
Rajkumar Meshram ◽  
Tushar Meshram ◽  
Srinivas Rao Baswani ◽  
...  
Keyword(s):  
Trace Element ◽  
Crustal Contamination ◽  
Central India ◽  
Primitive Mantle ◽  
Trace Element Geochemistry ◽  
Calc Alkaline ◽  
Element Geochemistry ◽  
Bastar Craton ◽  
Supplementary Material

AbstractThe lamproites and kimberlites are well known from the eastern Bastar craton, Central India. However, a Proterozoic lamprophyre dyke is discussed here, from the Western Bastar Craton (WBC). The field geology, petrographic, mineralogical, and whole-rock, and in situ trace element geochemistry of biotite were described for understanding its petrogenesis and lithospheric evolution in the WBC. The Thanewasna lamprophyre (TL) is undeformed and unmetamorphosed, intruded into ca.2.5 Ga charnockite and metagabbro but closely associated with ca. 1.62 Ga undeformed Mul granite. The TL has a characteristic porphyritic texture, dominated by phenocrysts of biotite, microphenocryst of amphibole, clinopyroxene, and a groundmass controlled by feldspar. Mineral chemistry of biotite and amphibole suggest a calc-alkaline (CAL) type, and pyroxene chemistry reveals an orogenic setting. The TL is characterized by high SiO2 and low TiO2, MgO, Ni, and Cr, consistent with its subcontinental lithospheric origin. The presence of crustal xenolith and ocelli texture followed by observed variations in Th/Yb, Hf/Sm, La/Nb, Ta/La, Nb/Yb, Ba/Nb indicate substantial crustal contamination. Whole-rock and in situ biotite analysis by LA-ICPMS show low concentrations of Ni (30-50 ppm) and Cr (70-150 ppm), point to the parental magma evolved nature. Enrichment in H2O, reflected in magmatic mica dominance, combined with high LILE, Th/Yb ratios, and striking negative Nb-Ta anomalies in trace element patterns, is consistent with a source that was metasomatized by hydrous fluids corresponding to those generated by subduction-related processes. Significant Zr-Hf and Ti anomalies in the primitive mantle normalized multi-element plots and the REE pattern of the TL, similar to the global calc-alkaline average trend, including eastern Dharwar craton lamprophyres. Our findings provide substantial petrological and geochemical constraints on petrogenesis and geodynamics. However, the geodynamic trigger that generated CAL magmatism and its role in Cu-Au metallogeny in the WBC, central India, is presently indistinct in the absence of isotopic studies. Nevertheless, the lamprophyre dyke is emplaced close to the Cu-(Au) deposit at Thanewasna.Supplementary material at https://doi.org/10.6084/m9.figshare.c.5361958

scholarly journals Sr-Nd-Pb isotope and trace element geochemistry of calc -alkaline andesites from Volcán Colima, Mexico

1993 ◽  
Vol 32 (4) ◽  
pp. 617-631
Author(s):  
Surendra P. Verma ◽  
James F. Luhr
Keyword(s):  
Trace Element ◽  
Trace Element Geochemistry ◽  
Calc Alkaline ◽  
Pb Isotope ◽  
Element Geochemistry

Se reportan los datos de elementos traza y las composiciones isotópicas de Sr, Nd y Pb en andesitas calco-alcalinas del Volcán Colima y se comparan con otros centros volcánicos del Cinturón Volcánico Mexicano. Los patrones de elementos de Tierras Raras normalizados con respecto a condritas demuestran un enriquecimiento en Tierras Raras ligeras y anomalías despreciables de Eu. Otros diagramas multi-elementos normalizados con respecto a MORB y manto "primitivo" demuestran anomalías negativas de Ta y Ti en las andesitas de Colima. Las relaciones isotópicas varían de 0.70355-0.70358 para 87Sr/86Sr, 0.51295-0.51298 para 143Nd/144Nd, y 18.57-18.59, 15.56-15.58 y 38.27-38.31 para 206Pb/204Pb, 207Pb/204Pb y 208Pb/204Pb respectivamente. Las relaciones isotópicas de Sr y Pb son significativamente menores y 143Nd/144Nd mayor que para la mayoría de las andesitas del Cinturón Volcánico Mexicano.

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