Results 41 to 50 of about 294,419 (331)

Detrital zircon and apatite (U‐Th)/He geochronology of intercalated baked sediments: a new approach to dating young basalt flows [PDF]

, 2011
Simple numerical models suggest that many basaltic lava flows should sufficiently heat the sediments beneath them to reset (U‐Th)/He systematics in detrital zircon and apatite.
Aciego, Aciego, Aciego, Blackburn, Blondes, Bristow, Dungan, Dungan, Farley, Farley, Flowers, Frances J. Cooper, Gardés, Gautheron, Hon, Hourigan, Jaeger, Kelley, Kip V. Hodges, Lipman, Lipman, Matthijs C. van Soest, McDougall, Min, Nasdala, Reiners, Schildgen, Schildgen, Self, Shuster, Vermeesch, Vermeesch, Wendt   +32 more
core   +2 more sources

Whitings in the Red Sea

The Depositional Record, EarlyView.
We present the first documentation of whitings in the Red Sea, observed in a lagoonal environment. These events are linked to cascading offshore dense waters that liberate trapped sea floor nutrients, triggering algal blooms and elevating alkalinity, which is buffered by direct CaCO3 precipitation—contributing to the accumulation of aragonite mud in ...
Manuel Ariza‐Fuentes, Akbar Wicaksono, Elisa Garuglieri, Vincent Saderne, Indah Putri, Francesca Giovenzana, Regina Iakusheva, Ibrahim Hoteit, Volker Vahrenkamp   +8 more
wiley   +1 more source

Organic Matter Accumulation Mechanism in the Lower Cambrian Strata from Well Luntan 1 in the Tarim Basin, NW China

Geofluids, 2021
A large amount of light crude oils have been found within 4000 to 7000 m deep strata of Cambrian, Ordovician, and Silurian reservoirs in the Tarim Basin, NW China.
Qian Deng, Haizu Zhang, Haozhe Wang, Zhiwei Wei, Bin Cheng, Shida Li, Yunpeng Wang, Oluwabamise Lekan Faboya, Zewen Liao   +8 more
doaj   +1 more source

Anomalous negative excursion of carbon isotope in organic carbon after the last Paleoproterozoic glaciation in North America [PDF]

, 2010
Early Paleoproterozoic time (2.5–2.0 Ga) spanned a critical phase in Earth's history, characterized by repeated glaciations and an increase in atmospheric oxygen (the Great Oxidation Event (GOE)).
Bekker, Bekker, Bekker, Bekker, Clayton, Dutkiewicz, Eigenbrode, Eiichi Tajika, Evans, Gair, Hayes, Hayes, Hayes, Holland, Joseph L. Kirschvink, Karhu, Kazuhisa Goto, Kirschvink, Kohonen, Long, Marmo, McLennan, Nanako O. Ogawa, Naohiko Ohkouchi, Ogawa, Ohkouchi, Ojakangas, Ojakangas, Ojakangas, Papineau, Pavlov, Rainbird, Rasmussen, Ryuji Tada, Schoell, Shinji Yamamoto, Vallini, Yasuhito Sekine, Young, Young, Young, Young   +41 more
core   +1 more source

Polygonal tepee structures of Arabia

The Depositional Record, EarlyView.
Tepee structures on Sheybarah Island form polygonal microbial cemented crusts in the intertidal. Radiocarbon dating suggests they formed in the Holocene and reflect minor sea‐level changes, highlighting their value as palaeoenvironmental indicators. Satellite surveys identified 126 polygonal features, including coral reefs that may have developed on ...
Pauline Falkenberg, Sarima Vahrenkamp, Elisa Garugleri, Alexander Petrovic, Kai Hachmann, Viswasanthi Chandra, Volker C. Vahrenkamp   +6 more
wiley   +1 more source

Interseismic strain accumulation: Spin-up, cycle invariance, and irregular rupture sequences [PDF]

, 2006
Using models of infinite length strike-slip faults in an elastic layer above linear viscoelastic regions, we investigate interseismic deformation. In the models we investigate, interseismic strain accumulation on mature faults is the result of the ...
Hager, B. H., Hetland, E. A.
core   +1 more source

Taking machine learning with a grain of sand: Sediment Analysis Neural‐network Data‐engine (SAND‐e) reveals sedimentological differences between turbid and clear‐water reefs

The Depositional Record, EarlyView.
Using machine learning, researchers can count and crudely identify sand grains from coral reefs automatically. This will allow us to generate larger datasets to answer sedimentological questions. Abstract Sediment is an important facet of sand cay reefs as it is responsible for reef accretion and island formation, with shifts in the proportions of ...
G. William M. Harrison, Teigan G. Collins, Allia Rosedy, Nadia Santodomingo, Willem Renema, Kenneth G. Johnson   +5 more
wiley   +1 more source

Characteristics of stable carbon isotopic composition of shale gas

Journal of Natural Gas Geoscience, 2016
A type Ⅱ kerogen with low thermal maturity was adopted to perform hydrocarbon generation pyrolysis experiments in a vacuum (Micro-Scale Sealed Vessel) system at the heating rates of 2 °C/h and 20 °C/h.
Zhenya Qu, Jianan Sun, Jianting Shi, Zhaowen Zhan, Yanrong Zou, Ping'an Peng   +5 more
doaj   +1 more source

High-temporal resolution fluvial sediment source fingerprinting with uncertainty: a Bayesian approach [PDF]

, 2014
This contribution addresses two developing areas of sediment fingerprinting research. Specifically, how to improve the temporal resolution of source apportionment estimates whilst minimizing analytical costs and, secondly, how to consistently quantify ...
Acornley, Agency, Bilotta, Blake, Boardman, Buchanan, Collins, Collins, Collins, Collins, Cooper, D'Haen, Dutton, Egozcue, Evans, Evrard, Evrard, Fox, Gellis, Gruszowski, Hancock, Hilton, Hiscock, Hiscock, Hopkins, Horowitz, House, Huisman, Jobbágy, Kim, Krueger, Lefrançois, Legout, Lewis, Martínez-Carreras, Martínez-Carreras, Massoudieh, Matsumoto, Meteorological Office, Motha, Navratil, Olley, Owens, Palmer, Parnell, Parnell, Phillips, Plummer, Poulenard, Poulenard, Pretty, R Development Core Team, Rawlins, Rawlins, Rowan, Russell, Schindler Wildhaber, Sear, Semmens, Slimane, Small, Smith, Smith, Smith, Theuring, Thompson, Thompson, Tremblay, Walling, Walling, Wilkinson, Williams   +71 more
core   +1 more source

Laguna Fuente de Piedra: An example of a dolomite factory recording ~50,000 years of depositional and paleoclimatic evolution

The Depositional Record, EarlyView.
This study characterises carbonate mineral precipitation mechanisms and their paleoenvironmental implications in a semi‐arid, saline playa lake system. SEM image with EDS spectra shows microcrystalline, spherical shaped dolomite crystals from Laguna Fuente de Piedra composed of nanocrystals with bacterial voids and EPS.
Zeina Naim, Guolai Li, Luis Gibert, Jan‐Berend Stuut, Gonzalo Jiménez‐Moreno, Mónica Sánchez‐Román   +5 more
wiley   +1 more source