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Petrogenic Indicator of Zedang Mantle Peridotite, Tibet: Insights from the Unusual Minerals
Author(s) -
GUO Guolin,
YANG Jingsui,
LIU Xiaodong,
XU Xiangzhen,
ZHANG Zhongming,
TIAN Yazhou,
XIONG Fahui,
WU Yong
Publication year - 2015
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 - 10.1111/1755-6724.12308_15
Subject(s) - peridotite , geology , mantle (geology) , geochemistry
These unusual mineral species and continental crustderived materials exist in mantle peridotite suggesting a genetic information relationship with mantle peridotite. Ancient crust may have experienced continental deep subduction or lithosphere delamination into the mantle, even into the mantle transition zone (410~660km), in an early stage of the process. Subsequently, these crustal materials were modified under high pressure and superreduced conditions within the deep mantle, and then upwelled to shallow levels as a result of mantle plume or mantle convection processes (Liou et al., 2014; Yang et al., 2015; Zhou et al., 2014). A large number of unusual mineral assemblages have been trapped within the mantle peridotite by such a recycling process. Comprehensive research on the mineralogy of unusual mineral assemblages in mantle peridotite is thus of great significance for understanding crust-mantle exchange and deep mantle dynamics.