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Occurrence of blueschist facies in the ophiolite belt of Naga Hills, East of Kiphire, N.E. India

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Zusammenfassung

Im Laufe einer systematischen geologischen Kartierung in einigen Teilen Tuensangs im Nagaland wurde Blauschiefermetamorphose in einem ophiolitischen Gürtel festgestellt. Die tektonischen Bedingungen, die eine solche Entstehung von Blauschiefern erlauben, können in bezug auf Raum und Zeit mit der Naga-Nahtlinie korreliert werden. Die Naga-Nahtlinie entstand während der Unterkreide und des Eozäns. Sie bildet die Kollisionsgrenze zwischen der indischen und der chinesischen Platte.

Résumé

Au cours d'un levé géologique systématique dans les régions du Tuensang, Nagaland, on a pu relever un léger métamorphisme à facies schiste bleu, associé à la ceinture ophiolitique. Les conditions tectoniques permettant la formation des schistes bleus peuvent être mises en liaison, dans l'espace et le temps, avec la «Naga suture», développée pendant le Crétacé supérieur et l'Eocène, et représentant la ligne de collision entre les plaques de l'Inde et de la Chine.

Abstract

In course of systematic geological mapping in parts of Tuensang district of Nagaland, imprints of blueschist metamorphism associated with the ophiolite belt have been located. The tectonic conditions that allow the formation of blueschists can be related in space and time in the “Naga suture” developed during the upper Cretaceous and Eocene age, representing the collision boundary between the Indian and Chinese plates.

Краткое содержание

При систематическом геологическом карти ровании отдельных районов Tuensangs в Nagaland, установили фаций гл аукофановых сланцев в офиолитовом поясе. Те ктонические условия, вызывающие п оявление такого слан ца, можно коррелировать со шво м Нага, как в пространстве, так и в о времени. Этот шов обр азовался за период от нижнего м ела до эоцена. Он возник на гр анице стыка индийско й и китайской платформы.

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  1. N. C. Ghose &  R. N. Singh

    Present address: Department of Geology, Patna University, Patna - 5, India

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    1. N. C. Ghose
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    2. R. N. Singh
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    Ghose, N.C., Singh, R.N. Occurrence of blueschist facies in the ophiolite belt of Naga Hills, East of Kiphire, N.E. India. Geol Rundsch 69, 41–48 (1980). https://doi.org/10.1007/BF01869022

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