Delineating and characterizing the boundary of the Cathaysia Block and the Jiangnan orogenic belt in South China

Jinlong Yao, Liangshu Shu, Peter A. Cawood, Jinyi Li

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The Jiangshan-Shaoxing fault zone lies along the SE margin of the Jiangnan belt, and delineates the northeastern margin of the Cathaysia Block of the South China Craton. At Shijiao in NE Zhejiang, the fault zone consists of hornblende schist intruded by migmatized quartz diorite. It constitutes a shear zone delineating the welded boundary between the Neoproterozoic Shuangxiwu Group of Jiangnan belt to the north and the Chencai Complex of Cathaysia Block to the south. The Shuangxiwu Group is composed mainly of basalt, andesite and flysch, whereas the Chencai Complex contains magmatic and sedimentary rocks that experienced amphibolite facies metamorphism. Zircons from quartz diorite and gabbro from the fault zone at Shijiao yield ages of 854 ± 6 Ma, 857 ± 5 Ma and 860 ± 5 Ma, with positive eHf(t) values of 7.81-11.8 and 4.57-10.39. The quartz diorite and mafic-ultramafic rock samples display minor LREE enriched pattern with obvious depletion of Nb, Ta, Rb, Ba and Ti, compared to their neighboring elements and plot in the volcanic arc field on geochemical diagrams, similar to that of volcanic rocks from Shuangxiwu Group. Overall relationships within the Jiangshan-Shaoxing fault zone at Shijiao suggest the ca. 860-850 Ma rock suites were generated in a convergent plate margin and are part of the Jiangnan belt, and not the Cathaysia Block, thus constraining the location of the suture between the two lithotectonic units in NE Zhejiang area during Neoproterozoic.

Original languageEnglish
Pages (from-to)265-277
Number of pages13
JournalPrecambrian Research
Volume275
DOIs
Publication statusPublished - 1 Apr 2016
Externally publishedYes

Keywords

  • Geochronology
  • Jiangshan-Shaoxing fault zone
  • Neoproterozoic arc suites
  • Quartz diorite
  • South China
  • Tectonic affinity

Cite this

@article{120fa0d883a94a4d9796608536c04bf4,
title = "Delineating and characterizing the boundary of the Cathaysia Block and the Jiangnan orogenic belt in South China",
abstract = "The Jiangshan-Shaoxing fault zone lies along the SE margin of the Jiangnan belt, and delineates the northeastern margin of the Cathaysia Block of the South China Craton. At Shijiao in NE Zhejiang, the fault zone consists of hornblende schist intruded by migmatized quartz diorite. It constitutes a shear zone delineating the welded boundary between the Neoproterozoic Shuangxiwu Group of Jiangnan belt to the north and the Chencai Complex of Cathaysia Block to the south. The Shuangxiwu Group is composed mainly of basalt, andesite and flysch, whereas the Chencai Complex contains magmatic and sedimentary rocks that experienced amphibolite facies metamorphism. Zircons from quartz diorite and gabbro from the fault zone at Shijiao yield ages of 854 ± 6 Ma, 857 ± 5 Ma and 860 ± 5 Ma, with positive eHf(t) values of 7.81-11.8 and 4.57-10.39. The quartz diorite and mafic-ultramafic rock samples display minor LREE enriched pattern with obvious depletion of Nb, Ta, Rb, Ba and Ti, compared to their neighboring elements and plot in the volcanic arc field on geochemical diagrams, similar to that of volcanic rocks from Shuangxiwu Group. Overall relationships within the Jiangshan-Shaoxing fault zone at Shijiao suggest the ca. 860-850 Ma rock suites were generated in a convergent plate margin and are part of the Jiangnan belt, and not the Cathaysia Block, thus constraining the location of the suture between the two lithotectonic units in NE Zhejiang area during Neoproterozoic.",
keywords = "Geochronology, Jiangshan-Shaoxing fault zone, Neoproterozoic arc suites, Quartz diorite, South China, Tectonic affinity",
author = "Jinlong Yao and Liangshu Shu and Cawood, {Peter A.} and Jinyi Li",
year = "2016",
month = "4",
day = "1",
doi = "10.1016/j.precamres.2016.01.023",
language = "English",
volume = "275",
pages = "265--277",
journal = "Precambrian Research",
issn = "0301-9268",
publisher = "Elsevier",

}

Delineating and characterizing the boundary of the Cathaysia Block and the Jiangnan orogenic belt in South China. / Yao, Jinlong; Shu, Liangshu; Cawood, Peter A.; Li, Jinyi.

In: Precambrian Research, Vol. 275, 01.04.2016, p. 265-277.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Delineating and characterizing the boundary of the Cathaysia Block and the Jiangnan orogenic belt in South China

AU - Yao, Jinlong

AU - Shu, Liangshu

AU - Cawood, Peter A.

AU - Li, Jinyi

PY - 2016/4/1

Y1 - 2016/4/1

N2 - The Jiangshan-Shaoxing fault zone lies along the SE margin of the Jiangnan belt, and delineates the northeastern margin of the Cathaysia Block of the South China Craton. At Shijiao in NE Zhejiang, the fault zone consists of hornblende schist intruded by migmatized quartz diorite. It constitutes a shear zone delineating the welded boundary between the Neoproterozoic Shuangxiwu Group of Jiangnan belt to the north and the Chencai Complex of Cathaysia Block to the south. The Shuangxiwu Group is composed mainly of basalt, andesite and flysch, whereas the Chencai Complex contains magmatic and sedimentary rocks that experienced amphibolite facies metamorphism. Zircons from quartz diorite and gabbro from the fault zone at Shijiao yield ages of 854 ± 6 Ma, 857 ± 5 Ma and 860 ± 5 Ma, with positive eHf(t) values of 7.81-11.8 and 4.57-10.39. The quartz diorite and mafic-ultramafic rock samples display minor LREE enriched pattern with obvious depletion of Nb, Ta, Rb, Ba and Ti, compared to their neighboring elements and plot in the volcanic arc field on geochemical diagrams, similar to that of volcanic rocks from Shuangxiwu Group. Overall relationships within the Jiangshan-Shaoxing fault zone at Shijiao suggest the ca. 860-850 Ma rock suites were generated in a convergent plate margin and are part of the Jiangnan belt, and not the Cathaysia Block, thus constraining the location of the suture between the two lithotectonic units in NE Zhejiang area during Neoproterozoic.

AB - The Jiangshan-Shaoxing fault zone lies along the SE margin of the Jiangnan belt, and delineates the northeastern margin of the Cathaysia Block of the South China Craton. At Shijiao in NE Zhejiang, the fault zone consists of hornblende schist intruded by migmatized quartz diorite. It constitutes a shear zone delineating the welded boundary between the Neoproterozoic Shuangxiwu Group of Jiangnan belt to the north and the Chencai Complex of Cathaysia Block to the south. The Shuangxiwu Group is composed mainly of basalt, andesite and flysch, whereas the Chencai Complex contains magmatic and sedimentary rocks that experienced amphibolite facies metamorphism. Zircons from quartz diorite and gabbro from the fault zone at Shijiao yield ages of 854 ± 6 Ma, 857 ± 5 Ma and 860 ± 5 Ma, with positive eHf(t) values of 7.81-11.8 and 4.57-10.39. The quartz diorite and mafic-ultramafic rock samples display minor LREE enriched pattern with obvious depletion of Nb, Ta, Rb, Ba and Ti, compared to their neighboring elements and plot in the volcanic arc field on geochemical diagrams, similar to that of volcanic rocks from Shuangxiwu Group. Overall relationships within the Jiangshan-Shaoxing fault zone at Shijiao suggest the ca. 860-850 Ma rock suites were generated in a convergent plate margin and are part of the Jiangnan belt, and not the Cathaysia Block, thus constraining the location of the suture between the two lithotectonic units in NE Zhejiang area during Neoproterozoic.

KW - Geochronology

KW - Jiangshan-Shaoxing fault zone

KW - Neoproterozoic arc suites

KW - Quartz diorite

KW - South China

KW - Tectonic affinity

UR - http://www.scopus.com/inward/record.url?scp=84956682254&partnerID=8YFLogxK

U2 - 10.1016/j.precamres.2016.01.023

DO - 10.1016/j.precamres.2016.01.023

M3 - Article

VL - 275

SP - 265

EP - 277

JO - Precambrian Research

JF - Precambrian Research

SN - 0301-9268

ER -