The Pre-Mesozoic crustal evolution of the Cathaysia Block, South China: Insights from geological investigation, zircon U–Pb geochronology, Hf isotope and REE geochemistry from the Wugongshan complex

2015 ◽  
Vol 28 (1) ◽  
pp. 225-245 ◽  
Author(s):  
J.Q. Wang ◽  
L.S. Shu ◽  
M. Santosh ◽  
Z.Q. Xu
Keyword(s):  
South China ◽  
Hf Isotope ◽  
Crustal Evolution ◽  
Geological Investigation ◽  
Ree Geochemistry ◽  
Cathaysia Block

Zircon U–Pb ages and Hf isotope compositions of the Chencai migmatite, central Zhejiang Province, South China: constraints on the early Palaeozoic orogeny

2017 ◽  
Vol 155 (6) ◽  
pp. 1377-1393 ◽  
Author(s):  
LONGMING LI ◽  
SHOUFA LIN ◽  
JIANHUA LI ◽  
JIAN HE ◽  
YANPENG GE
Keyword(s):  
South China ◽  
Tectonic Evolution ◽  
Main Part ◽  
Zhejiang Province ◽  
Hf Isotope ◽  
Crustal Thickening ◽  
Weighted Mean ◽  
Thermal Event ◽  
Cathaysia Block ◽  
Early Palaeozoic

AbstractU–Pb ages and Hf isotope compositions of zircons from the Chencai complex in Zhejiang Province have been determined to provide constraints on mechanisms of migmatization and tectonic evolution related to the early Palaeozoic orogeny in the Cathaysia Block, South China. Zircons from leucosome samples of migmatites are characterized by nebulous overgrowths enclosing inherited cores or occur as newly formed grains with weak zoning. Five samples gave weighted mean ages ranging from 438±3 Ma to 432±4 Ma, which are interpreted as recording the time of anatexis of a regional tectono-thermal event. TheirεHf(t) values range from −21.4 to −4.8 (with peak at −11), with correspondingTDM2ages of 1.73–2.77 Ga (with peak atc.1.9–2.3 Ga), suggesting that the protoliths formed by reworking of ancient crust evolved from Late Palaeoproterozoic – early Archaean crust–mantle differentiation. The migmatization was spatially and temporally associated with reported 460–435 Ma metamorphism with a clockwise pressure–temperature (P–T) path and was most likely controlled by crustal thickening driven by the early Palaeozoic orogenesis. TheTDM2ages of the Chencai complex are consistent with those of the Wuyi–Yunkai structural belt in the Cathaysia Block, but distinct from those (with peak at 2.7–3.0 Ga) of the Badu complex which lacks early Palaeozoic tectono-thermal records. The data support the suggestion that a postulated geological entity, instead of the east domain (the Badu complex being its main part) of the Cathaysia Block, was probably involved in the early Palaeozoic orogeny.

Thermal gradient and geochronology of a Paleozoic high-grade terrane in the northeastern Cathaysia block, South China

2016 ◽  
Vol 691 ◽  
pp. 311-327 ◽  
Author(s):  
Lei Zhao ◽  
Mingguo Zhai ◽  
Xiwen Zhou ◽  
M. Santosh ◽  
Xudong Ma
Keyword(s):  
South China ◽  
Thermal Gradient ◽  
High Grade ◽  
Cathaysia Block
Sign in / Sign up

Export Citation Format

Share Document