Search Results - "Biosignature"

Life on the edge: Microbial biomineralization in an arsenic- and lead-rich deep-sea hydrothermal vent by Hu, S.Y., Barnes, S.J., Pagès, A., Parr, J., Binns, R., Verrall, M., Quadir, Z., Rickard, William, Liu, W., Fougerouse, Denis, Grice, Kliti, Schoneveld, L., Ryan, C., Paterson, D.

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Environmental conditions and microbial community structure during the Great Ordovician Biodiversification Event; a multi-disciplinary study from the Canning Basin, Western Australi... by Spaak, G., Edwards, D., Foster, C., Pagès, A., Summons, R., Sherwood, N., Grice, Kliti

“…The correlation of a strong G. prisca biosignature with high 3-methylhopane indices and 13 C depleted G. prisca–derived chemical fossils (biomarkers) is interpreted to suggest an ecological relationship between methanotrophs and G. prisca. …”
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Biogeochemical cycles (C, N, S, P and Fe) of modern and ancient microbialites (Western Australia) by Pagès, Anais

“…In addition, the preservation pathways of biosignatures in microbialites through time were explored, providing a better insight into the evolution of early-life.…”
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Palaeobiology of red and white blood cell-like structures, collagen and cholesterol in an ichthyosaur bone by Plet, C., Grice, Kliti, Pagès, A., Verrall, M., Coolen, M., Ruebsam, W., Rickard, W., Schwark, L.

“…Recently, biomolecules (e.g. cholesterol) and molecular fossils (biomarkers) were also discovered in a 380 million-year-old concretion, revealing their importance in exceptional preservation of biosignatures. Here, we used a range of microanalytical techniques, biomarkers and compound specific isotope analyses to report the presence of red and white blood cell-like structures as well as platelet-like structures, collagen and cholesterol in an ichthyosaur bone encapsulated in a carbonate concretion from the Early Jurassic (~182.7 Ma). …”
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Organic molecules in the Sheepbed Mudstone, Gale Crater, Mars by Freissinet, C., Glavin, D., Mahaffy, P., Miller, K., Eigenbrode, J., Summons, Roger, Brunner, A., Buch, A., Szopa, C., Archer, P., Franz, H., Atreya, S., Brinckerhoff, W., Cabane, M., Coll, P., Conrad, P., Des Marais, D., Dworkin, J., Fairén, A., François, P., Grotzinger, J., Kashyap, S., Ten Kate, I., Leshin, L., Malespin, C., Martin, M., Martin-Torres, F., Mcadam, A., Ming, D., Navarro-González, R., Pavlov, A., Prats, B., Squyres, S., Steele, A., Stern, J., Sumner, D., Sutter, B., Zorzano, M.

“…This will guide the future search for biosignatures. Here we report the definitive identification of chlorobenzene (150–300 parts per billion by weight (ppbw)) and C2 to C4 dichloroalkanes (up to 70 ppbw) with the SAM gas chromatograph mass spectrometer (GCMS) and detection of chlorobenzene in the direct evolved gas analysis (EGA) mode, in multiple portions of the fines from the Cumberland drill hole in the Sheepbed mudstone at Yellowknife Bay. …”
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Mudstones and embedded concretions show differences in lithology-related, but not source-related biomarker distributions by Lengger, S., Melendez, I., Summons, R., Grice, Kliti

“…Biomarker data showed that mudstone and concretions had very similar distributions and presented marine biosignatures including indicators of anoxic depositional conditions, a stratified water column, and photic zone euxinia. …”
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