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The Cambrian collision of the Yangtze Block with Gondwana: Evidence from provenance analyses.

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Title: The Cambrian collision of the Yangtze Block with Gondwana: Evidence from provenance analyses.
Authors: Yuyue Han1,2,3, Bo Ran1 ranbo08@cdut.edu.cn, Santosh, M.4,5, Shugen Liu1,6, Zhiwu Li1, Yuehao Ye1, Fan Lv1, Han Wang1, Chao Li1,2,3
Source: Geological Society of America Bulletin. Jan2025, Vol. 137 Issue 1/2, p594-612. 19p.
Subject Terms: *Zircon, *Trace elements, *Paleozoic Era, *Paleogeography, *Ocean, *Density, *Orogenic belts
Abstract: The Neoproterozoic to Paleozoic Proto-Tethys Ocean has preserved critical records of Earth's evolutionary history. The Lower Cambrian detrital strata along the northern margin of the Yangtze Block provide valuable information for gaining insight into the evolution of the Proto-Tethys Ocean, which is important in understanding the collision between the Yangtze Block and the Gondwana assembly. Here, we present comprehensive U-Pb ages and trace elements of zircons from Lower Cambrian detrital strata in the Yangtze Block. Our results revealed prominent age peaks at 600-500 Ma and 1100-800 Ma for detrital zircons in the Cambrian strata. The trace element characteristics of the detrital zircon indicate that the source rocks were mainly intermediate-felsic magmatic suites with minor input from mafic sources. These results suggest that the detrital materials were not only supplied from the interior of the Yangtze Block but also from magmatic sources in the internal orogenic belt of Gondwana. Furthermore, the kernel density estimate plots of detrital zircon U-Pb ages indicate a stable source-sink system in the Yangtze Block during the Early Cambrian. However, our data indicate that the crustal thickness of the Yangtze Block increased significantly since ca. 526 Ma, and the cumulative characteristics of the detrital zircons indicate that the rocks were deposited in a compressional tectonic environment after ca. 526 Ma, in contrast to those during the late Neoproterozoic, which were generally deposited in an extensional tectonic environment. This transition indicates that the initial collision between the Yangtze Block and the Gondwana supercontinent might have occurred at ca. 526 Ma, marking the rapid aggregation of the northern domain of the Gondwana assembly and potentially serving as an important indicator of the closure of the Yangtze-associated Proto-Tethys Ocean. Our findings provide key insights into late Neoproterozoic-early Paleozoic ocean-land evolution. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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An: 182387948
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  Label: Title
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  Data: The Cambrian collision of the Yangtze Block with Gondwana: Evidence from provenance analyses.
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  Data: <searchLink fieldCode="AR" term="%22Yuyue+Han%22">Yuyue Han</searchLink><relatesTo>1,2,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Bo+Ran%22">Bo Ran</searchLink><relatesTo>1</relatesTo><i> ranbo08@cdut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Santosh%2C+M%2E%22">Santosh, M.</searchLink><relatesTo>4,5</relatesTo><br /><searchLink fieldCode="AR" term="%22Shugen+Liu%22">Shugen Liu</searchLink><relatesTo>1,6</relatesTo><br /><searchLink fieldCode="AR" term="%22Zhiwu+Li%22">Zhiwu Li</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Yuehao+Ye%22">Yuehao Ye</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Fan+Lv%22">Fan Lv</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Han+Wang%22">Han Wang</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Chao+Li%22">Chao Li</searchLink><relatesTo>1,2,3</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Geological+Society+of+America+Bulletin%22">Geological Society of America Bulletin</searchLink>. Jan2025, Vol. 137 Issue 1/2, p594-612. 19p.
– Name: Subject
  Label: Subject Terms
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  Data: *<searchLink fieldCode="DE" term="%22Zircon%22">Zircon</searchLink><br />*<searchLink fieldCode="DE" term="%22Trace+elements%22">Trace elements</searchLink><br />*<searchLink fieldCode="DE" term="%22Paleozoic+Era%22">Paleozoic Era</searchLink><br />*<searchLink fieldCode="DE" term="%22Paleogeography%22">Paleogeography</searchLink><br />*<searchLink fieldCode="DE" term="%22Ocean%22">Ocean</searchLink><br />*<searchLink fieldCode="DE" term="%22Density%22">Density</searchLink><br />*<searchLink fieldCode="DE" term="%22Orogenic+belts%22">Orogenic belts</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The Neoproterozoic to Paleozoic Proto-Tethys Ocean has preserved critical records of Earth's evolutionary history. The Lower Cambrian detrital strata along the northern margin of the Yangtze Block provide valuable information for gaining insight into the evolution of the Proto-Tethys Ocean, which is important in understanding the collision between the Yangtze Block and the Gondwana assembly. Here, we present comprehensive U-Pb ages and trace elements of zircons from Lower Cambrian detrital strata in the Yangtze Block. Our results revealed prominent age peaks at 600-500 Ma and 1100-800 Ma for detrital zircons in the Cambrian strata. The trace element characteristics of the detrital zircon indicate that the source rocks were mainly intermediate-felsic magmatic suites with minor input from mafic sources. These results suggest that the detrital materials were not only supplied from the interior of the Yangtze Block but also from magmatic sources in the internal orogenic belt of Gondwana. Furthermore, the kernel density estimate plots of detrital zircon U-Pb ages indicate a stable source-sink system in the Yangtze Block during the Early Cambrian. However, our data indicate that the crustal thickness of the Yangtze Block increased significantly since ca. 526 Ma, and the cumulative characteristics of the detrital zircons indicate that the rocks were deposited in a compressional tectonic environment after ca. 526 Ma, in contrast to those during the late Neoproterozoic, which were generally deposited in an extensional tectonic environment. This transition indicates that the initial collision between the Yangtze Block and the Gondwana supercontinent might have occurred at ca. 526 Ma, marking the rapid aggregation of the northern domain of the Gondwana assembly and potentially serving as an important indicator of the closure of the Yangtze-associated Proto-Tethys Ocean. Our findings provide key insights into late Neoproterozoic-early Paleozoic ocean-land evolution. [ABSTRACT FROM AUTHOR]
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      – Type: doi
        Value: 10.1130/B37470.1
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 19
        StartPage: 594
    Subjects:
      – SubjectFull: Zircon
        Type: general
      – SubjectFull: Trace elements
        Type: general
      – SubjectFull: Paleozoic Era
        Type: general
      – SubjectFull: Paleogeography
        Type: general
      – SubjectFull: Ocean
        Type: general
      – SubjectFull: Density
        Type: general
      – SubjectFull: Orogenic belts
        Type: general
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      – TitleFull: The Cambrian collision of the Yangtze Block with Gondwana: Evidence from provenance analyses.
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            NameFull: Bo Ran
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            – D: 01
              M: 01
              Text: Jan2025
              Type: published
              Y: 2025
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              Value: 137
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