Translator Disclaimer
1 January 2018 Paleocene Radiolarian Faunas in the Deep-Marine Sediments Near Zhongba County, southern Tibet
Xin Li, Yalin Li, Chengshan Wang, Atsushi Matsuoka
Author Affiliations +
Abstract

An upper Paleocene radiolarian-bearing succession (ZN1) located in the southern part of the north subzone of the Tethyan Himalaya is composed of siliceous siltstones and claystones. In this paper, 23 species belonging to 13 genera are reported. Three new species, Lychnocanium? pyramis Li and Matsuoka sp. nov., Lychnocanium? stypticum Li and Matsuoka sp. nov., and Pterocyrtidium sinense Li and Matsuoka sp. nov., are described. Radiolarian assemblages from this succession can be compared with the Bekoma campechensis Zone (RP6), indicating a time interval of 61.5–58.23 Ma, i.e., late Paleocene. The radiolarian assemblages from the Yamdrok mélange, the Zheba section, and the Jiazhu section indicate that they are of the same age as those from the Zhinadibu 1 section. The lack of calcareous and coarse-grained terrestrial materials in the ZN1 section proves that the strata of this section were deposited in a relatively deep marine environment below the calcium carbonate compensation depth (CCD) and more distal to the continents during the late Paleocene. Coeval deepwater sediments near Saga were accumulated near the CCD.

© by the Palaeontological Society of Japan
Xin Li, Yalin Li, Chengshan Wang, and Atsushi Matsuoka "Paleocene Radiolarian Faunas in the Deep-Marine Sediments Near Zhongba County, southern Tibet," Paleontological Research 22(1), 37-56, (1 January 2018). https://doi.org/10.2517/2017PR009
Received: 24 October 2016; Accepted: 1 April 2017; Published: 1 January 2018
JOURNAL ARTICLE
20 PAGES


Share
SHARE
KEYWORDS
Indian passive margin
late Paleocene
new species
radiolarian assemblages
southern Tibet
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top