Climatic control on primary productivity changes during development of the Late Eocene Kiliran Jao lake, Central Sumatra Basin, Indonesia

作者: Agus Haris Widayat , Bas van de Schootbrugge , Wolfgang Oschmann , Komang Anggayana , Wilhelm Püttmann

DOI: 10.1016/J.COAL.2016.08.008

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摘要: Abstract A 102 m long core section of the late Eocene Kiliran Jao oil shale has been studied by means palynofacies and inorganic geochemistry to examine role climate change on development paleo-lake. Climate changes during deposition are interpreted from abundance variation fungal remains. Higher remains in middle part profile indicates relatively warmer deposition. The is thought have led lake productivity. Carbon isotopic compositions organic matter (δ 13 C) range − 27.0 − 30.5‰. These generally more depleted indicating lower primary productivity Botryococcus braunii varies 3 16% abundant profile. This consistent with less trophic preference this algal blooming. induced stratification, limiting introduction recycled nutrients epilimnion, thereby reducing

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