Out of rock: A new look at the morphological and geochemical preservation of microfossils from the 3.46 Gyr-old Strelley Pool Formation
Out of rock: A new look at the morphological and geochemical preservation of microfossils from the 3.46 Gyr-old Strelley Pool Formation
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脱离岩石:对 3.46 吉里斯特雷池地层微化石形态和地球化学保存的新认识
DOI:
10.1016/j.precamres.2019.105472
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发表时间:
2020
影响因子:
3.8
通讯作者:
Delarue F
中科院分区:
文献类型:
--
作者:
Delarue F
The biogenicity of most of the putative Archean organic-walled microfossils discussed in the literature remains debated. Here, we report morphological and geochemical characterizations of an assemblage of microfossils isolated from the 3.46 Gyr-old Strelley Pool Formation (Western Australia), thereby providing a new set of data on the oldest authentic microfossils on Earth. Isolated microstructures/microfossils were studied by combining scanning electron microscopy imaging and elemental analyses, Raman spectroscopy and nanoscale secondary ion mass spectrometry (NanoSIMS). We identified four morphological types, namely filaments, films, spheroids and lenses. A minority of spheroids, films and lenses exhibits a continuous wall cell surface and high N concentrations and substantial P contents (as suggested by31P−/12C2−ionic ratios), i.e. exceptionally high morphological and geochemical preservation levels. In addition to the detection of P within microfossil walls, P was also found within micrometric patches in lenses exhibiting a fusiform shape. These patches may be remains of polyphosphate granules possibly formed during sporulation, suggesting, in turn, that cellular organization appeared as soon as 3.46 Gyr ago.
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影响因子:
5
作者:
Lepot;K.;Williford;K.H.;Ushikubo;T.;Sugitani;K.;Mimura;K.;Spicuzza;M.J.;Valley;J.W.
通讯作者:
J.W.
DOI:
10.1073/pnas.1718063115
发表时间:
2018-01-02
影响因子:
11.1
作者:
Schopf, J. William;Kitajima, Kouki;Valley, John W.
通讯作者:
Valley, John W.
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
D. Oehler;F. Robert;Malcolm R. Walter;K. Sugitani;A. Allwood;A. Meibom;S. Mostefaoui;M. Sélo;A. Thomen;E. Gibson
通讯作者:
E. Gibson
影响因子:
4.2
作者:
K. Sugitani;Takashi Kohama;K. Mimura;M. Takeuchi;R. Senda;Hiroshi Morimoto
通讯作者:
Hiroshi Morimoto
影响因子:
2.6
作者:
Y. Ueno;Y. Isozaki;H. Yurimoto;S. Maruyama
通讯作者:
S. Maruyama