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Liu, Xiao-Lei; Lipp, Julius S; Simpson, Jeffrey H; Lin, Yu-Shih; Summons, Roger E; Hinrichs, Kai-Uwe (2012): (Table 1) Ratio of hydroxy-GDGT vs. the total core GDGT was calculated based on the detection of hydroxy-GDGT [dataset]. PANGAEA,, Supplement to: Liu, X-L et al. (2012): Mono- and dihydroxyl glycerol dibiphytanyl glycerol tetraethers in marine sediments: Identification of both core and intact polar lipid forms. Geochimica et Cosmochimica Acta, 89, 102-115,

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Hydroxylated glycerol dialkyl glycerol tetraethers (hydroxy-GDGTs) were detected in marine sediments of diverse depositional regimes and ages. Mass spectrometric evidence, complemented by information gleaned from two-dimensional (2D) 1H–13C nuclear magnetic resonance (NMR) spectroscopy on minute quantities of target analyte isolated from marine sediment, allowed us to identify one major compound as a monohydroxy-GDGT with acyclic biphytanyl moieties (OH-GDGT-0). NMR spectroscopic and mass spectrometric data indicate the presence of a tertiary hydroxyl group suggesting the compounds are the tetraether analogues of the widespread hydroxylated archaeol derivatives that have received great attention in geochemical studies of the last two decades. Three other related compounds were assigned as acyclic dihydroxy-GDGT (2OH-GDGT-0) and monohydroxy-GDGT with one (OH-GDGT-1) and two cyclopentane rings (OH-GDGT-2). Based on the identification of hydroxy-GDGT core lipids, a group of previously reported unknown intact polar lipids (IPLs), including the ubiquitously distributed H341-GDGT (Lipp J. S. and Hinrichs K. -U. (2009) Structural diversity and fate of intact polar lipids in marine sediments. Geochim. Cosmochim. Acta 73, 6816–6833), and its analogues were tentatively identified as glycosidic hydroxy-GDGTs. In addition to marine sediments, we also detected hydroxy-GDGTs in a culture of Methanothermococcus thermolithotrophicus. Given the previous finding of the putative polar precursor H341-GDGT in the planktonic marine crenarchaeon Nitrosopumilus maritimus, these compounds are synthesized by representatives of both cren- and euryarchaeota. The ubiquitous distribution and apparent substantial abundance of hydroxy-GDGT core lipids in marine sediments (up to 8% of total isoprenoid core GDGTs) point to their potential as proxies.
Related to:
Liu, Xiao-Lei; Lipp, Julius S; Hinrichs, Kai-Uwe (2011): Distribution of intact and core GDGTs in marine sediments. Organic Geochemistry, 42(4), 368-375,
Seventh Framework Programme (FP7), grant/award no. 247153: Deep subsurface Archaea: carbon cycle, life strategies, and role in sedimentary ecosystems
Median Latitude: 5.397441 * Median Longitude: -58.744601 * South-bound Latitude: -25.344500 * West-bound Longitude: -126.865233 * North-bound Latitude: 48.698150 * East-bound Longitude: 32.701400
Date/Time Start: 1995-03-28T13:12:00 * Date/Time End: 2008-04-27T10:32:00
Minimum DEPTH, sediment/rock: 0.1 m * Maximum DEPTH, sediment/rock: 320.0 m
160-966C * Latitude: 33.796400 * Longitude: 32.701400 * Date/Time Start: 1995-03-28T13:12:00 * Date/Time End: 1995-03-29T03:20:00 * Elevation: -926.0 m * Penetration: 127 m * Recovery: 101.6 m * Location: Eastern Basin * Campaign: Leg160 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 17 cores; 127 m cored; 0 m drilled; 80 % recovery
201-1226B * Latitude: -3.094480 * Longitude: -90.817980 * Date/Time Start: 2002-02-19T19:55:00 * Date/Time End: 2002-02-23T10:45:00 * Elevation: -3297.0 m * Penetration: 421.4 m * Recovery: 413.69 m * Location: South Pacific Ocean * Campaign: Leg201 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 47 cores; 418.9 m cored; 2.5 m drilled; 98.8 % recovery
201-1226E * Latitude: -3.094050 * Longitude: -90.817980 * Date/Time: 2002-02-23T13:35:00 * Elevation: -3296.4 m * Penetration: 418.4 m * Recovery: 226.96 m * Location: South Pacific Ocean * Campaign: Leg201 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 25 cores; 227.5 m cored; 190.9 m drilled; 99.8 % recovery
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEvent
2Latitude of eventLatitude
3Longitude of eventLongitude
4Elevation of eventElevationm
5DEPTH, sediment/rockDepth sedmGeocode
6Sample code/labelSample labelLiu, Xiao-Lei
7Area/localityAreaLiu, Xiao-Lei
8Monohydroxy-glycerol dialkyl glycerol tetraethers/total core GDGTOH-GDGT/total core GDGT%Liu, Xiao-LeiMass spectrometer, APCI-MSD single quadrupole
9Dihydroxy-glycerol dialkyl glycerol tetraethers/total core GDGT2OH-GDGT/total core GDGT%Liu, Xiao-LeiMass spectrometer, APCI-MSD single quadrupole
10Identified intact polar glycerol dialkyl glycerol tetraethersIdentified intact polar GDGTsLiu, Xiao-LeiMass spectrometer, APCI-MSD single quadrupole
59 data points

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