Synsedimentary ash rains and paleoenvironmental conditions during the deposition of the Chachil Formation (Pliensbachian) at its type locality, Neuquén Basin, Argentina
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- 作者：Claudia Armellaa ; armella@ingeis.uba.ar" class="auth_mail" title="E-mail the corresponding author ; Hé ; ctor A. Leanzab ; hleanza@macn.gov.ar" class="auth_mail" title="E-mail the corresponding author ; Fernando Corfuc ; fernando.corfu@geo.uio.no" class="auth_mail" title="E-mail the corresponding author
- 关键词：Chachil Formation ; Volcaniclastic-carbonate platform ; Facies/microfacies analysis ; Ash fall ; Geochronology ; Lower Jurassic ; Neuqué ; n Basin ; Argentina
- 刊名：Journal of South American Earth Sciences
- 出版年：2016
- 出版时间：November 2016
- 年：2016
- 卷：71
- 期：Complete
- 页码：82-95
- 全文大小：8105 K
文摘
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Sedimentological analyses validate Chachil Fm instead of Chachil Limestones.
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Deposition occurred in a shallow mixed volcaniclastic-carbonate platform.
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The carbonate platform sedimentation was affected by ash fall supply.
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Primary pyroclastic and resedimented tuffolitic facies were recognized.
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Zircon U-Pb ages reveal a Pliensbachian tephra input affecting the platform.