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Petrology and geochemistry dataset of the Precambrian granitoids from the part of Gadwal schist belt, Eastern Dharwar Craton India.

ABSTRACT: The data presented in this article related to the research article entitled "Petrology and Geochemistry of the Precambrian granitoids from the part of Gadwal schist belt, Eastern Dharwar craton India". The granitoids from the Gadwal schist belt area of the Telangana State are confined to Precambrian gneissic complex part of Eastern Dharwar Craton. The article described the petrology and whole rock geochemistry in the Precambrian gneissic complex part of gadwall schist belt. The whole rock geochemistry is made publicity available to enable significant analyzes.

SUBMITTER: Ramakrishna P

PROVIDER: S-EPMC6488742 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature

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Petrology and geochemistry dataset of the Precambrian granitoids from the part of Gadwal schist belt, Eastern Dharwar Craton India.

Ramakrishna P P Anjaneyulu M M Praveen K K

Data in brief 20190307

The data presented in this article related to the research article entitled "Petrology and Geochemistry of the Precambrian granitoids from the part of Gadwal schist belt, Eastern Dharwar craton India". The granitoids from the Gadwal schist belt area of the Telangana State are confined to Precambrian gneissic complex part of Eastern Dharwar Craton. The article described the petrology and whole rock geochemistry in the Precambrian gneissic complex part of gadwall schist belt. The whole rock geoche ...[more]

PMID: 31061852

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Project description:The Longwangzhuang pluton is a typical example of Paleoproterozoic A-type granite intrusions at the southern margin of the North China Craton. This pluton is composed of arfvedsonite granite and minor aegirine-augite granites. Samples from both granite types display similar zircon U-Pb ages with 207U-206Pb ages of 1612?±?19?Ma [mean square weighted deviation (MSWD)?=?0.66] and 1609?±?24?Ma (MSWD?=?0.5), respectively. The granites exhibit similar high silica (SiO2?=?71.1-73.4 wt.%), high alkaline (Na2O?+?K2O?=?8.10-9.26 wt.%, K2O/Na2O?>?1), and low Al2O3 (11.8-12.8 wt. %) contents and metaluminous to weakly peraluminous bulk chemistry. The chemical variations of the Longwangzhuang pluton suggest the effects of mineral fractionation. In addition, all samples show typical characteristics of A-type granites, such as high 10000Ga/Al ratios (4.10-7.28), high FeOtot/(FeOtot?+?MgO) ratios (0.88-0.99), and high Zr (484-1082 ppm), Ce (201-560 ppm), and Y (78-156 ppm) contents. The ?Nd(t) values and the (206Pb/204Pb)t, (207Pb/204Pb)t, and (208Pb/204Pb)t ratios of the arfvedsonite granite samples vary from -4.6 to -5.3, 15.021 to 17.349, 15.241 to 15.472, and 33.206 to 36.905, respectively, and those for the aegirine-augite granite sample amount at -0.2, 14.421, 15.175, and 33.706. The distinct and variable Nd and Pb isotope values indicate the presence of heterogeneous protoliths. Based on its geochemistry, its low initial Pb isotope ratios, and its enrichment in Nd isotopes, we infer that the Longwangzhuang A-type granite is the partial melting product of basement rocks such as the Taihua Group gneisses accompanied by some involvement of juvenile material from the mantle. Together with published data from other Paleoproterozoic A-type granite plutons exposed at the southern margin of the craton, our findings suggest that these granites had a similar origin. Furthermore, geochemically, they can be divided into two groups: A2-type, which formed earlier (~1.8-1.6 Ga), and A1-type, which formed later (~1.6-1.5 Ga). Combining this information with the variations in whole-rock Nd and zircon Hf isotopic composition at ca. 1.6 Ga, we propose that tectonic transformation from post-orogenic to anorogenic magmatism occurred at the southern margin of the North China Craton at that time.

Dataset Information

Petrology and geochemistry dataset of the Precambrian granitoids from the part of Gadwal schist belt, Eastern Dharwar Craton India.

Publications

Petrology and geochemistry dataset of the Precambrian granitoids from the part of Gadwal schist belt, Eastern Dharwar Craton India.

Similar Datasets

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