Open AccessPetrologic and chronological characteristics and formation mechanism of peperite in the Sanjiang Orogenic Belt in western Yunnan, China
Author(s) -
Xianfeng Cheng,
Qionghua Zuo,
Ming-Xing Peng,
Liu De-li,
Xingtao Li,
Ma Wei,
NA Zheng-qing
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/362/1/012159
Subject(s) - geology , geochemistry , paleontology , lava , permian , china , period (music) , volcano , structural basin , archaeology , geography , physics , acoustics
Jamda-Weixi continent marginal arc belt is an important component to understand the evolution of Paleotethyan. For the first time, the occurrence of peperite is being reported at the bottom of Pantiange Formation in western Yunnan, China. Two types of peperites have been identified, namely fluidal peperite and blocky peperite. LA-ICP-MS U–Pb dating results (253.6±0.7Ma) of dacitic lava showed that the peperite was formed during the late Permian. The peperite was formed during the alternation of active period and quiet period of the volcano in an apparent shallow ocean margin.