Download A Petrographic Atlas of Ophiolite: An example from the by Naresh Chandra Ghose, Nilanjan Chatterjee, Fareeduddin PDF

By Naresh Chandra Ghose, Nilanjan Chatterjee, Fareeduddin

ISBN-10: 8132215680

ISBN-13: 9788132215684

The ebook is a considerate dialogue with scientists learning convergent plate limitations resembling the well known, lively India-Eurasia collision region. It presents a finished selection of petrographic pictures of ophiolitic rocks exhumed from oceanic lithosphere and mantle on the India-Asia plate boundary. Ophiolite is uncovered within the northwestern Himalayas, japanese Indian plate margin and Andaman-Nicobar Islands. on the jap margin, it happens in a slim strip comprising mantle peridotite tectonite, cummulate peridotite-gabbro-plagiogranite-anorthosite, mafic dyke, volcanics and oceanic sediments. Low temperature/high strain rocks together with blueschists and eclogites have been greatly studied lately. Ophiolite derived sediments and podiform chromites can be mentioned to supply entire information. Supplemental maps, geological sections, box sketches and pictures will clarify the constitution, stratigraphy, ore mineralization, and metamorphic history.

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Extra resources for A Petrographic Atlas of Ophiolite: An example from the eastern India-Asia collision zone

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Himal Geol 7:479–482 Vohra CP, Haldar D, Ghosh Roy AK (1989) The Andaman-Nicobar ophiolite complex and associated mineral resources—current appraisal. In: Ghose NC (ed) Phanerozoic ophiolites of India. Sumna Publishers, Patna, pp 381–315 Wang R, Xia B, Zhou G, Zhang Y, Yang Z, Li W, Wei D, Zhong L, Xu L (2006) SHRIMP zircon U-Pb dating for gabbro from the Tiding ophiolite in Tibet. Chinese Science Bulletin 51:1776–1779 Warren CJ, Parrish RR, Waters DJ, Searle MP (2005) Dating the geologic history of Oman’s Semail Ophiolite: insights from U–Pb geochronology.

Indicate a Late Eocene-Oligocene age and a possible homotaxial relationship with the Barail Group deposited over the Disang Formation elsewhere in the Naga Hills (Chattopadhyay et al. 1983). About 5 km south of Phokphur, where the Jopi Formation is known as Phokphur Formation, seven closely spaced, gastropoddominated, fine tuffaceous breccia horizons with coaly and carbonaceous streaks and plant fossils have been identified (Vidyadharan et al. 1986). Presence of Assilina sp. in these horizons suggests an Eocene age (Ranga Rao 1983).

The weakly metamorphosed units in the lower part of the sequence show alternation of slate and phyllite with quartzite, whereas uppermost units are unmetamorphosed (Vidyadharan et al. 1986). A wide range of invertebrate and plant fossils and microfossils within the formation indicates a subtle change in climate with the advent of the Cenozoic Era. , whereas leaf impressions of plants include Graminea, Shorea, Psidium and Annona (Ghose and Singh 1981). , indicate a Late Eocene-Oligocene age and a possible homotaxial relationship with the Barail Group deposited over the Disang Formation elsewhere in the Naga Hills (Chattopadhyay et al.

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