Depositional processes of plant fragment-concentrated sandstones in turbiditic sequences recorded by plant biomarkers (Miocene Kawabata Formation, Japan)
Depositional processes of plant fragment-concentrated sandstones in turbiditic sequences recorded by plant biomarkers (Miocene Kawabata Formation, Japan)
复制标题
植物生物标志物记录的浊积层序中植物碎片集中砂岩的沉积过程(日本中新世川端组)
DOI:
10.1016/j.coal.2020.103643
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发表时间:
2021
影响因子:
5.6
通讯作者:
Kawakami Gentaro
中科院分区:
文献类型:
--
作者:
Furota Satoshi;Sawada Ken;Kawakami Gentaro
Occasionally, distinctive plant fragment (PF)-concentrated sandstone beds are found in the turbiditic sequence of the Miocene Kawabata Formation (Yubari, central Hokkaido, Japan) deposited in a foredeep basin. Sedimentological and organic geochemical analyses were carried out on the PF-concentrated sandstone bed to investigate the transport and depositional processes of the abundant PFs in the basin. The PF-concentrated sandstone bed was subdivided into lower and upper PF-concentrated layers based on their sedimentary structures. The lower layer contains chaotically dispersed PFs, and the upper layer is characterized by PF laminae. The dispersed PFs in the lower layer were likely deposited by rapid depositional processes such as freezing or rapid fall-out of suspended particles. The huge amount of PF deposition was confirmed by biomarker data such as sterane distributions and pristane/phytane ratios. The compositions ofn-alkanes and diterpenoids in the PF-concentrated sandstone bed are distinct from those in the other sandstone and mudstone beds. These results imply that the terrigenous particles originated from specific terrestrial higher plants that were effectively transported and deposited, resulting in formation of the PF-concentrated sandstone bed. The distinctive sedimentary structures observed in the sequences could be attributed to a large flood discharge and the huge volume of PFs might have been transported directly from an upper reach of river and then reached the deep-sea basin by density flows, such as relatively concentrated hyperpycnal flows.
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DOI:
10.5772/56748
发表时间:
2013
期刊:
--
影响因子:
--
作者:
Gentaro Kawakami
通讯作者:
Gentaro Kawakami
DOI:
10.5575/geosoc.108.186
发表时间:
2002
期刊:
Journal of the Geological Society of Japan
影响因子:
--
作者:
Gentaro Kawakami;M. Shiono;M. Kawamura;A. Urabe;I. Koizumi
通讯作者:
I. Koizumi
DOI:
--
发表时间:
1996
期刊:
影响因子:
--
作者:
P. Meyers;J. Silliman;T. Shaw
通讯作者:
T. Shaw
DOI:
--
发表时间:
2004
期刊:
Island Arc 13
影响因子:
--
作者:
Kawakami;G.
通讯作者:
G.
DOI:
10.20612/rog.30.1_9
发表时间:
2014
期刊:
Researches in organic geochemistry
影响因子:
--
作者:
S. Furota;K. Sawada;Gentaro Kawakami
通讯作者:
Gentaro Kawakami