Marine hazards from 2000 to 2016 in Zhejiang province of the subtropical region, South China

AbstractThe latest Ordovician to earliest Silurian graptolite Avitograptus avitus is important in the biostratigraphy of the Ordovician–Silurian boundary interval. Two additional species of Avitograptus are described from the sponge-dominated Anji Biota of the Upper Ordovician Wenchang Formation (Metabolograptus persculptus Biozone) of Zhejiang Province, South China. One species, Avitograptus akidomorphus new species, is new; the other, Avitograptus acanthocystus new combination, which was previously placed in Climacograptus, is herein assigned to Avitograptus. The former species may represent the ancestral akidograptid because it is identical in thecal form to Akidograptus, but differs in the development of the proximal end. The evolutionary changes from Avitograptus avitus to Akidograptus and Parakidograptus involved distal movement of the origins of th11 and th12, thecal elongation, and greater outward inclination of the thecal walls.UUID: http://zoobank.org/81c433a0-9069-48d2-ae72-1267400cbf77.

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Early Triassic conodont–palynological biostratigraphy of the Meishan D Section in Changxing, Zhejiang Province, South China

Palaeogeography Palaeoclimatology Palaeoecology ◽

10.1016/j.palaeo.2006.11.031 ◽

2007 ◽

Vol 252 (1-2) ◽

pp. 4-23 ◽

Cited By ~ 58

Author(s):

Kexin Zhang ◽

Jinnan Tong ◽

G.R. Shi ◽

Xulong Lai ◽

Jianxin Yu ◽

...

Keyword(s):

South China ◽

Zhejiang Province ◽

Early Triassic

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Ostracods (Crustacea) through the Permian-Triassic boundary in South China: the Meishan stratotype (Zhejiang Province)

Journal of Systematic Palaeontology ◽

10.1080/14772011003784992 ◽

2010 ◽

Vol 8 (3) ◽

pp. 331-370 ◽

Cited By ~ 28

Author(s):

Sylvie Crasquin ◽

Marie-Béatrice Forel ◽

Feng Qinglai ◽

Yuan Aihua ◽

François Baudin ◽

...

Keyword(s):

South China ◽

Zhejiang Province ◽

Triassic Boundary ◽

Permian Triassic Boundary

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Geochemical and geochronological constraints on the Jiangshan-Shaoxing Fault Zone in Zhejiang Province, Eastern South China

10.5353/th_b4598386 ◽

2011 ◽

Author(s):

Ping-mei, Jean Wong

Keyword(s):

Fault Zone ◽

South China ◽

Zhejiang Province ◽

Geochronological Constraints

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The Neoproterozoic continental rift magmatism of the eastern Jiangnan orogen: new evidence from the mafic sheets in northern Zhejiang Province, South China

International Geology Review ◽

10.1080/00206814.2016.1232180 ◽

2016 ◽

Vol 59 (7) ◽

pp. 829-844 ◽

Cited By ~ 1

Author(s):

Xiao-Xiong Ma ◽

Chuan-Wan Dong ◽

Chao Zhou ◽

Qing Lv ◽

Hong-Yan Gu ◽

...

Keyword(s):

South China ◽

Zhejiang Province ◽

Continental Rift ◽

New Evidence

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

Geological Magazine ◽

10.1017/s0016756817000292 ◽

2017 ◽

Vol 155 (6) ◽

pp. 1377-1393 ◽

Cited By ~ 6

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.

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