@article{oai:ir.kagoshima-u.ac.jp:00014956, author = {NAKABAYASHI, Marimo and REHMAN, Hafiz Ur}, journal = {鹿児島大学理学部紀要, Reports of the Faculty of Science, Kagoshima University}, month = {Dec}, note = {Granitic rocks are widely distributed on earth that are formed by the solidification/crystallization of magma. Most granites contain zircons, an accessory mineral, that preserve records of the magmatic crystallization. In this study, zircons from the Neoproterozoic (750 Ma) Nagar Parkar Igneous Complex were studied for crystal morphology to constrain the temperatures of crystallization. In total, 255 zircon crystals from two granitic varieties (gray and pink granites) were investigated. Majority of the crystals exhibit well-developed {100} and {110} prisms and short {101}, {211} and {121} pyramidal faces. Temperatures estimated from the zircon typology from gray granites ranged from 633?831 °C (n: 24) for sample NGP62a, 650?850 °C (n: 78) for sample NGP62b, 600?850 °C (n: 37) for sample NP01, 675?800 °C (n: 31) for sample NP12, and 613?850 °C (n:56) for sample NP62, and one pink granite sample showed a range from 675?800 °C (n: 7). Average temperatures from the above samples, when compared with the Titanium-in-zircon thermometry and the results were better than or within ± 50 °C for four samples, and within ± 100 °C for other two samples. The data from zircon typology show granodiorites to monzogranites fields, and a few crystals point towards alkaline granites. The zircon morphology suggest that the magma was possibly derived from a crustal origin with minor hybridization of the mantle component.}, pages = {32--49}, title = {Crystallization temperatures and petrogenetic source of the Neoproterozoic Nagar Parkar granites : deduced from zircon crystal shapes}, volume = {52}, year = {2019} }