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Middle Triassic radiolarians from cherts/siliceous shales in an extensional basin in the Sukhothai fold belt, Northern Thailand.

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Title: Middle Triassic radiolarians from cherts/siliceous shales in an extensional basin in the Sukhothai fold belt, Northern Thailand.
Authors: Thassanapak, Hathaithip1, Udchachon, Mongkol1 mongkol.c@msu.ac.th, Feng, Qinglai2, Burrett, Clive
Source: Journal of Earth Science. Feb2017, Vol. 28 Issue 1, p9-28. 20p.
Subject Terms: *Orogenic belts, *Structural geology, *Geological basins, *Thrust belts (Geology), *Animal diversity
Abstract: More than thirty species of radiolarians are described from maroon chert and siliceous shales from the Den Chai and Santisuk sections in the east of the Sukhothai fold belt. The fauna obtained from Den Chai comprises Muelleritortis cochleata cochleata, M. cochleata tumidospina, M. expansa, Triassocampe deweveri, T. coronata, T. scalaris, Annulotriassocampe companilis, A. multisegmantatus, A. sulovensis, Pseudostylosphaera coccostyla coccostyla, P. imperspicua, Canoptum inornatus, C. levis, Corum kraineri, Spongoserrula rarauana, Orbiculiforma karnica and others. The assemblage may be correlated with those reported in the Fang-Chiang Dao and Lumphun areas in the north of Thailand and in the Changning-Menglian belt of western Yunnan, South China and suggests a late Ladinian (Middle Triassic) age. The radiolarian fauna from the Santisuk Section comprises Muelleritortis cochleata cochleata, M. sp., Striatotrissocampe nodosoannulata, Triassocampe. deweveri, T. sp., Pseudogodia? sp., Pseudostylosphaera coccostyla coccostyla, Archaeocenosphera sp., Annulotriassocampe multisegmantis, Pseudostylosphaera sp., and others which indicates a late Ladinian age. Middle Triassic radiolarian chert and siliceous shale from Den Chai and Santisuk are interpreted as having been deposited in an extensional continental margin within the Sukhothai fold belt and not in the Devonian-Permian back-arc basin of the Nan suture. These deep marine sequences were deposited in a subsiding continental margin in the Lampang-Phrae Basin. We consider these sequences to be part of the Hong Hoi Formation (Anisian-Ladinian) of the Lampang Group which, in turn, may be compared to the Choushui Formation and other associated Middle Triassic formations in the Simao Basin of South China. [ABSTRACT FROM AUTHOR]
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  Label: Title
  Group: Ti
  Data: Middle Triassic radiolarians from cherts/siliceous shales in an extensional basin in the Sukhothai fold belt, Northern Thailand.
– Name: Author
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  Data: <searchLink fieldCode="AR" term="%22Thassanapak%2C+Hathaithip%22">Thassanapak, Hathaithip</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Udchachon%2C+Mongkol%22">Udchachon, Mongkol</searchLink><relatesTo>1</relatesTo><i> mongkol.c@msu.ac.th</i><br /><searchLink fieldCode="AR" term="%22Feng%2C+Qinglai%22">Feng, Qinglai</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Burrett%2C+Clive%22">Burrett, Clive</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Earth+Science%22">Journal of Earth Science</searchLink>. Feb2017, Vol. 28 Issue 1, p9-28. 20p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Orogenic+belts%22">Orogenic belts</searchLink><br />*<searchLink fieldCode="DE" term="%22Structural+geology%22">Structural geology</searchLink><br />*<searchLink fieldCode="DE" term="%22Geological+basins%22">Geological basins</searchLink><br />*<searchLink fieldCode="DE" term="%22Thrust+belts+%28Geology%29%22">Thrust belts (Geology)</searchLink><br />*<searchLink fieldCode="DE" term="%22Animal+diversity%22">Animal diversity</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: More than thirty species of radiolarians are described from maroon chert and siliceous shales from the Den Chai and Santisuk sections in the east of the Sukhothai fold belt. The fauna obtained from Den Chai comprises Muelleritortis cochleata cochleata, M. cochleata tumidospina, M. expansa, Triassocampe deweveri, T. coronata, T. scalaris, Annulotriassocampe companilis, A. multisegmantatus, A. sulovensis, Pseudostylosphaera coccostyla coccostyla, P. imperspicua, Canoptum inornatus, C. levis, Corum kraineri, Spongoserrula rarauana, Orbiculiforma karnica and others. The assemblage may be correlated with those reported in the Fang-Chiang Dao and Lumphun areas in the north of Thailand and in the Changning-Menglian belt of western Yunnan, South China and suggests a late Ladinian (Middle Triassic) age. The radiolarian fauna from the Santisuk Section comprises Muelleritortis cochleata cochleata, M. sp., Striatotrissocampe nodosoannulata, Triassocampe. deweveri, T. sp., Pseudogodia? sp., Pseudostylosphaera coccostyla coccostyla, Archaeocenosphera sp., Annulotriassocampe multisegmantis, Pseudostylosphaera sp., and others which indicates a late Ladinian age. Middle Triassic radiolarian chert and siliceous shale from Den Chai and Santisuk are interpreted as having been deposited in an extensional continental margin within the Sukhothai fold belt and not in the Devonian-Permian back-arc basin of the Nan suture. These deep marine sequences were deposited in a subsiding continental margin in the Lampang-Phrae Basin. We consider these sequences to be part of the Hong Hoi Formation (Anisian-Ladinian) of the Lampang Group which, in turn, may be compared to the Choushui Formation and other associated Middle Triassic formations in the Simao Basin of South China. [ABSTRACT FROM AUTHOR]
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        Value: 10.1007/s12583-017-0740-x
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        Text: English
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      – SubjectFull: Orogenic belts
        Type: general
      – SubjectFull: Structural geology
        Type: general
      – SubjectFull: Geological basins
        Type: general
      – SubjectFull: Thrust belts (Geology)
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      – SubjectFull: Animal diversity
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      – TitleFull: Middle Triassic radiolarians from cherts/siliceous shales in an extensional basin in the Sukhothai fold belt, Northern Thailand.
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            NameFull: Thassanapak, Hathaithip
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            NameFull: Udchachon, Mongkol
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            NameFull: Feng, Qinglai
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            NameFull: Burrett, Clive
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            – D: 01
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              Text: Feb2017
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              Y: 2017
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