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New Discovery of Radiolarians in the Pomulong Mélange, Middle part of the Yarlung Zangbo Suture Zone, Tibet
Author(s) -
SUN Qian,
JI Zhansheng,
WU Guichun,
WAN Xiaoqiao
Publication year - 2019
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.14317
Subject(s) - beijing , chinese academy of sciences , china , library science , geology , geography , archaeology , computer science
The Pomulong mélange was established in the regional geological survey of Lhaze County at the scale of 1:250000 by the Geological Survey Institute of Hubei Province, and regarded as the Jurassic-Cretaceous representative strata in this area. It is distributed eastwestward along the southern belt of Yarlung Zangbo Suture Zone in Lhaze area. Its matrix is composed of purplish red and variegated silicon argillaceous slate, clayey siltstone, siliceous rock, etc. The rock blocks are mainly limestone, basalt, greywacke and so on (Zhu et al., 2003). Five genera of radiolarian fossils were recovered by previous researchers from the matrix with a roughly defined age of Late Jurassic-Early Cretaceous. However, the fossils reported by previous researchers were relatively scarce with only genus-level taxonomic identification, and the biostratigraphy study was also very weak. A more detailed biostratigraphic study of the Pomulong mélange is significant to deepen the understanding of the sedimentary environment in the middle part of Yarlung Zangbo Suture Zone in the Late Jurassic-Early Cretaceous Period. In this paper, we report additional radiolarian fossils from the Kongkongma section (starting point N29°07'32.0", E87° 58'10.3") in the Resa Town of the Lhaze County.