TY - JOUR
T1 - Petrochemistry of peridotites from North China
T2 - Significance for lithospheric mantle evolution
AU - Zheng, Jianping
AU - Yu, Chunmei
AU - Yuan, Xiaoping
AU - Yin, Li
AU - Jiao, Shujuan
AU - Tang, Huayun
AU - Zhang, Zhihai
AU - Lu, Fengxiang
PY - 2007/2
Y1 - 2007/2
N2 - A petrochemical analysis was undertaken of peridotitic xenoliths in volcanic rocks that erupted from the Paleozoic to the Cenozoic within the eastern part of the North China craton, and the peridotites as tectonic intrusion in the Early Mesozoic from the Sulu orogen. The results show that the cratonic mantle, which was refractory and existed when the kimberlites intruded in the Paleozoic, had almost been replaced by the newly accreted fertile lithospheric mantle during the Mesozoic-Cenozoic. The erosion, metasomatism, and intermingling caused by the accreted asthenospheric material acting on the craton mantle along the weak zone and deep fault (such as the Tanlu fault) in the existing lithosphere resulted in the lithospheric thinning at a larger scale 100 Ma ago (but later than 178 Ma). The largest thinning would be in the Eogene. The upwelling asthenospheric material transformed into accreted lithospheric mantle due to the asthenospheric temperature falling in the Neogene (leading to relatively slight lithospheric incrassation), and finally accomplished mantle replacement. The peridotitic body in the Sulu orogen represents the products spreading from the modified cratonic lithospheric mantle.
AB - A petrochemical analysis was undertaken of peridotitic xenoliths in volcanic rocks that erupted from the Paleozoic to the Cenozoic within the eastern part of the North China craton, and the peridotites as tectonic intrusion in the Early Mesozoic from the Sulu orogen. The results show that the cratonic mantle, which was refractory and existed when the kimberlites intruded in the Paleozoic, had almost been replaced by the newly accreted fertile lithospheric mantle during the Mesozoic-Cenozoic. The erosion, metasomatism, and intermingling caused by the accreted asthenospheric material acting on the craton mantle along the weak zone and deep fault (such as the Tanlu fault) in the existing lithosphere resulted in the lithospheric thinning at a larger scale 100 Ma ago (but later than 178 Ma). The largest thinning would be in the Eogene. The upwelling asthenospheric material transformed into accreted lithospheric mantle due to the asthenospheric temperature falling in the Neogene (leading to relatively slight lithospheric incrassation), and finally accomplished mantle replacement. The peridotitic body in the Sulu orogen represents the products spreading from the modified cratonic lithospheric mantle.
KW - Eastern North China block
KW - Mantle replacement
KW - Peridotite
KW - Petrochemistry
UR - http://www.scopus.com/inward/record.url?scp=34250707388&partnerID=8YFLogxK
U2 - 10.1007/s11707-007-0006-5
DO - 10.1007/s11707-007-0006-5
M3 - Article
AN - SCOPUS:34250707388
SN - 1673-7385
VL - 1
SP - 37
EP - 43
JO - Frontiers of Earth Science in China
JF - Frontiers of Earth Science in China
IS - 1
ER -