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Climatic control on primary productivity changes during development of the Late Eocene Kiliran Jao lake, Central Sumatra Basin, Indonesia
Widayat A.H.a,b, van de Schootbrugge B.a,c, Oschmann W.a, Anggayana K.b, Puttmann W.a
a Institute of Atmospheric and Environmental Sciences, Department of Analytical Environmental Chemistry, Goethe University, Frankfurt am Main, D-60438, Germany
b Research Group of Earth Resources Exploration, Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, Bandung, 40132, Indonesia
c Department of Earth Sciences, Utrecht University, Utrecht, 3584 CS, Netherlands
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2016 Elsevier B.V.A 102 m long core section of the late Eocene Kiliran Jao oil shale has been studied by means of palynofacies and inorganic geochemistry to examine the role of climate change on the development of the Kiliran Jao paleo-lake. Climate changes during deposition of the studied oil shale are interpreted from the abundance variation of fungal remains. Higher abundance of fungal remains in the middle part of the oil shale profile indicates relatively warmer climate during deposition. The warmer climate is thought to have led to changes in lake productivity. Carbon isotopic compositions of organic matter (δ13C) range from − 27.0 to − 30.5‰. These are generally more depleted in the middle part of the profile indicating lower primary productivity of the lake during deposition. Botryococcus braunii varies from 3 to 16% and is generally more abundant in the middle part of the profile. This is consistent with the less trophic preference of this algal blooming. The warmer climate is thought to have induced stratification, limiting the introduction of recycled nutrients to the epilimnion, thereby reducing the lake productivity.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Botryococcus braunii,Carbon isotope composition,Carbon isotopic composition,Climatic controls,Inorganic geochemistries,Lake productivities,Paleoproductivity,Primary productivity[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Botryococcus braunii,Carbon isotope composition,Climate change,Kiliran Jao paleo-lake,Paleoproductivity[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]This study has been carried out in Biodiversity and Climate Research Center (BIK-F). Financial support provided by the German Academic Exchange Service (DAAD) to the first author (AHW) is gratefully acknowledged. We wish to thank the Indonesian Center for Geological Resources (PSDG) for providing the oil shale samples in this study.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1016/j.coal.2016.08.008[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]