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            "Department of Geology, Faculty of Science, University of Peradeniya, 20400, Peradeniya, Sri Lanka", 
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    "description": "Recent studies on zircons at high resolution separated from metamorphosed rocks of igneous origin of the four tectonic domains of Sri Lanka by Lu\u2013Hf and U\u2013Pb isotope systematics have shed light upon its tectono-magmatic history. While providing better insights, the new dataset is not contradictory with Nd-model ages and U\u2013Pb zircon dates discovered from Sri Lanka in early 90s. These new data suggest that both Wanni (WC) and Vijayan (VC) Complexes were magmatic arcs with the former being relatively older than the latter, and the Kadugannawa Complex (KC) is a marginal arc magmatic suite in the vicinity of WC. The oldest Highland Complex (HC) has been derived of Mesoproterozoic to Archean crustal and subducted sedimentary components. The Lu\u2013Hf systematics of rocks from the HC record the oldest Hf-crustal model age of\u2009~\u20093.5\u00a0Ga and highly negative \u03b5Hf(t)(t) values (up to \u2212\u00a030) inferring contribution of older subducted sediments and/or crustal components. In the WC and KC tectonic units, variable \u03b5Hf(t) of zircon from negative to positive values from gneisses indicate the involvement of both juvenile mantle components and older continental materials in the generation of the arc-related magma with Hf-model ages from\u2009~\u2009700 to 2800\u00a0Ma. On the other hand, the meta igneous rocks of the VC have distinct positive \u03b5Hf(t) data with Hf-modal ages in the range of\u2009~\u2009700\u20131600\u00a0Ma supporting entirely a juvenile origin. During the Neoproterozoic to Cambrian (ca. 700\u2013500\u00a0Ma), the HC has predominantly served as a suture zone for the collision of the WC and VC arcs. This suggests that the Sri Lankan terrains were juxtaposed at an active continental margin setting associated with two-staged subduction during the Gondwana amalgamation. The metamorphism took place during the Neoproterozoic in the entire basement up to the granulite facies conditions reaching intermittently ultrahigh temperature (UHT) conditions.", 
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    "name": "Review on Age of Magmatism and Crust Formation in Sri Lanka: U\u2013Pb and Lu\u2013Hf Isotopic Perspectives", 
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