Results 41 to 50 of about 32,483 (245)

Seismological structure of the 1.8 Ga Trans-Hudson Orogen of North America [PDF]

, 2016
Precambrian tectonic processes are debated: what was the nature and scale of orogenic events on the younger, hotter, and more ductile Earth? Northern Hudson Bay records the Paleoproterozoic collision between the Western Churchill and Superior plates—the ∼
Abbott, Acton, Agius, Ammon, Amy Gilligan, Baird, Bao, Bastow, Bastow, Berman, Berman, Breemen, Bédard, Caldwell, Christensen, Corrigan, Corrigan, Darbyshire, Darbyshire, Darbyshire, Eaton, Eaton, Ekström, Fiona A. Darbyshire, Flament, Garth, Gibb, Gilligan, Hartlaub, Hartlaub, Herrmann, Hoffman, Ian D. Bastow, Jones, Kennett, Kgaswane, Kind, Leech, Ligorría, Nelson, Nunn, Nábělek, Pawlak, Pawlak, Porritt, Rai, Rapine, Rey, Schneider, Schulte-Pelkum, Snyder, Snyder, St-Onge, St-Onge, St-Onge, Thompson, Thompson, Tugume, Wessel, Zegers, Zhang, Zhu, Özalaybey   +62 more
core   +1 more source

Organosulfur Aerosols Likely Carried Sulfur MIF Signatures in the Early Earth’s Atmosphere

Geochemistry, Geophysics, Geosystems, 2023
Signatures of mass‐independent fractionation (MIF) of sulfur in Archean sulfide and sulfate minerals are widely thought to record an anoxic early Earth’s atmosphere.
Harry Oduro, Shuhei Ono, Faisal Alrasheed, Daniel L. Eldridge   +3 more
doaj   +1 more source

The formation of Laurentia : Evidence from shear wave splitting [PDF]

, 2017
The authors would like to thank A. Walker for invaluable help understanding the MSAT forward modelling code, as well as A. Boyce, L. Petrescu, and C.
Bastow, Ian, Darbyshire, Fiona, Gilligan, Amy, Liddell, Mitch V, Pugh, Steven   +4 more
core   +2 more sources

The Role of N2 as a Geo-Biosignature for the Detection and Characterization of Earth-like Habitats [PDF]

, 2019
Since the Archean, N2 has been a major atmospheric constituent in Earth's atmosphere. Nitrogen is an essential element in the building blocks of life, therefore the geobiological nitrogen cycle is a fundamental factor in the long term evolution of both ...
Cubillos, Patricio E., Fossati, Luca, Grenfell, John Lee, Lammer, Helmut, Lendl, Monika, Scherf, Manuel, Sproß, Laurenz   +6 more
core   +2 more sources

Metasomatized lithospheric mantle for Mesozoic giant gold deposits in the North China craton [PDF]

, 2020
The origin of giant lode gold deposits of Mesozoic age in the North China craton (NCC) is enigmatic because high-grade metamorphic ancient crust would be highly depleted in gold.
Becker, Harry, Cheng, Huai, Foley, Stephen, Geng, Xianlei, Liu, Yongsheng, Wang, Christina Yan, Wang, Zaicong, Wu, Fuyuan, Yang, Jinhui, Zong, Keqing   +9 more
core   +1 more source

Is the Pale Blue Dot unique? Optimized photometric bands for identifying Earth-like exoplanets

, 2016
The next generation of ground and space-based telescopes will image habitable planets around nearby stars. A growing literature describes how to characterize such planets with spectroscopy, but less consideration has been given to the usefulness of ...
Arney, Giada, Catling, David C., Charnay, Benjamin, Krissansen-Totton, Joshua, Meadows, Victoria, Robinson, Tyler D., Schwieterman, Edward W.   +6 more
core   +1 more source

Tubular microfossils from ∼2.8 to 2.7Ga-old lacustrine deposits of South Africa: A sign for early origin of eukaryotes? [PDF]

, 2016
Unequivocal evidence for Archean eukaryotic life has been long sought for and is a matter of lively debate. In the absence of unambiguous fossils this debate has focused on biogeochemical signatures and molecular phylogenies.
Altermann, Wladyslaw, Franchi, Ian, Kaźmierczak, Józef, Kremer, Barbara   +3 more
core   +2 more sources

Machine Learning‐Driven Classification and Production Capacity Prediction of Tight Sandstone Reservoirs: A Case Study of the Taiyuan Formation, Ordos Basin

Energy Science &Engineering, EarlyView.
On the basis of core and log data, a Bayesian‐Optimized Random Forest model achieved 92.76% accuracy in classifying tight sandstone reservoirs. A gray relational analysis‐derived evaluation index shows > 80% consistency with actual gas zones. ABSTRACT Tight sandstone gas (TSG), an unconventional oil–gas resource, has heterogeneous reservoirs ...
Yin Yuan, Haijiao Fu, Detian Yan, Gang Wang, Shuguang Yang, Mengmeng Liu, Qingling Jiang, Xiaoming Wang, Wei Wang   +8 more
wiley   +1 more source

Habitable Climate Scenarios for Proxima Centauri b With a Dynamic Ocean

, 2017
The nearby exoplanet Proxima Centauri b will be a prime future target for characterization, despite questions about its retention of water. Climate models with static oceans suggest that an Earth-like Proxima b could harbor a small dayside region of ...
Aleinov, Igor, Amundsen, David S., Clune, Thomas L., Del Genio, Anthony D., Kelley, Maxwell, Kiang, Nancy Y., Way, Michael J.   +6 more
core   +1 more source

Spatial Variations in Methane Content and Their Main Controlling Factors of the Deep‐Buried Coalbed in the Nalinhe–Hengshan Area, Ordos Basin

Energy Science &Engineering, EarlyView.
Ash yield is the primary geological factor controlling the spatial variations in the total gas content of the deep‐buried coalbed methane in the Nalinhe‐Hengshan area, Ordos Basin. However, porosity dominates the differential enrichment of the free gas content of the deep‐buried coalbed methane in the Nalinhe‐Hengshan area, Ordos Basin.
Shi Yunhe, Wang Kangle, Wang Huaichang, Wang Yufei, Zhang Hui, Cao Jingjing, Yin Liangliang, Hu Xinyou, Liang Chao, Liu Mina   +9 more
wiley   +1 more source