Early Cretaceous radiolarians from the Indus suture zone, Ladakh, northern India

Kojima, Satoru ; Ahmad, Talat ; Tanaka, Tsuyoshi ; Bagati, Triloki Nath ; Mishra, Miwnal ; Kumar, Rohtash ; Islam, Rafiqul ; Khanna, Prampal (2001) Early Cretaceous radiolarians from the Indus suture zone, Ladakh, northern India News of Osaka Micropaleontologists (NOM), 12 . pp. 257-270.

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The Nidar ophiolitic complex in estern Ladakh, northem India, consists of u1tramafic rocks, gabbro and sedimentary-volcanic member, in ascending order. The sedimentary-volcanic member in thee Nidar area is about 370 m in thickness, and is composed of altemating chert, japerite, volcanic rocks, red shale, volcanic conglomerate, sandstone and shale. Among these rocks, chert and shale yields well-preserved radiolarian fossils, which range in age, at least, from Hauterivian to Aptian (Early Cretaceous). These ages are consistent with the Sm-Nd mineral-whole rock isochron age of the underlying gabbro. The lithology, ages and geochemical characteristics of the Nidar ophiolitic complex indicate that the complex formed in an intra-oceanic volcanic arc setting. A chert block from the Shergol ophiolitic melange in westem Ladakh yields Albian radiolarians.

Item Type:Article
Source:Copyright of this article belongs to Terra Scientific Publishing Company, Tokyo.
Keywords:Cretaceous; Radiolarians; Shergol Ophiolitic Melange; Nidar Ophiolitic Complex; Indus Suture Zone; Ladakh; India
ID Code:306
Deposited On:20 Sep 2010 08:41
Last Modified:05 Jan 2011 05:54

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