Results 21 to 30 of about 829 (171)

AGE AND PROVENANCE OF THE ARGUN SERIES SEDIMENTARY ROCKS OF THE ARGUN CONTINENTAL MASSIF: LA-ICP-MS U-Pb AGES OF DETRITAL ZIRCONS

Геодинамика и тектонофизика, 2022
For the first time there were obtained LA-ICP-MS U-Pb age data on detrital zircons from sediments of the Bystraya and Ernichnaya formations of the Argun series of the northwestern Argun continental massif.
Yu. N. Smirnova, V. B. Khubanov
doaj   +1 more source

Nd Isotope Mapping of Crustal Terranes in the Parent-Clova Area, Quebec: Implications for the Evolution of the Laurentian Margin in the Central Grenville Province

Geosciences, 2013
Over 100 new Nd isotope analyses for the central Grenville Province in the Parent-Clova region of Quebec help fill a major gap in understanding the crustal accretion history of the province.
Alan Dickin, Mark Zelek
doaj   +1 more source

The Mesoproterozoic in the Nordic countries

Episodes, 2008
During the Mesoproterozoic, central Fennoscandia and Laurentia (Greenland) were characterized by a weakly extensional stress regime, as evident from episodic rapakivi granites, dolerite dykes, continental rift intrusives, sandstone basins and continental flood basalts. Along the southwestern active margin of Fennoscandia, the 1.64-1.52 Ga Gothian and 1.
Bernard Bingen, Jenny Andersson, Ulf Söderlund, Charlotte Möller   +3 more
openaire   +2 more sources

Phylotranscriptomic insights into a Mesoproterozoic–Neoproterozoic origin and early radiation of green seaweeds (Ulvophyceae)

Nature Communications, 2022
“Ulvophyceae is a remarkably morphologically and ecologically diverse clade of green algae. Here, the authors reconstruct the Ulvophyceae phylogeny, showing that these algae originated earlier than expected and may have influenced biogeochemical cycles ...
Zheng Hou, Xiaoya Ma, Xuan Shi, Xi Li, Lingxiao Yang, Shuhai Xiao, Olivier De Clerck, Frederik Leliaert, Bojian Zhong   +8 more
doaj   +1 more source

Petroleum geological conditions and exploration importance of Proterozoic to Cambrian in China

Petroleum Exploration and Development, 2018
The discovery of the giant Anyue gas field in Sichuan Basin gives petroleum explorers confidence to find oil and gas in Proterozoic to Cambrian.
Wenzhi ZHAO, Suyun HU, Zecheng WANG, Shuichang ZHANG, Tongshan WANG   +4 more
doaj   +1 more source

The origin of Telemarkites from the Mesoproterozoic of Telemark, Norway [PDF]

Norwegian Journal of Geology, 2018
The possible macrofossil Telemarkites enigmaticus from the Mesoproterozoic Gjuve Formation, Telemark supracrustals, southern Norway, was described by Dons in 1959. We here present finds of similar, but larger structures from the somewhat older Åmot Formation (c. 1150–1250 Ma).
Gyøry, Emil, Hammer, Øyvind, Jorde, Knut, Nakrem, Hans Arne, Swajda, Michael, Domeier, Mathew   +5 more
openaire   +3 more sources

Stromatolites and calcitized evaporite in a hypersaline playa lake: Rossport Formation (Mesoproterozoic, Ontario)

The Depositional Record, 2022
The Mesoproterozoic Rossport Formation of Ontario, Canada is generally interpreted as having been deposited in an intracratonic basin, most probably a rift‐related lake. While the Rossport, overall, is dominated by sandstone and shale, the Middlebrun Bay
Julie K. Bartley, Sydney M. Firmin, John T. Berger   +2 more
doaj   +1 more source

Mesoproterozoic post-orogenic magmatism on the southwestern North China Craton: onset of Columbia breakup

Frontiers in Earth Science
IntroductionThe North China Craton experienced multiple episodes of Mesoproterozoic anorogenic magmatism, which provides critical insights into the breakup process of the Columbia supercontinent.
Junping Cui, Junping Cui, Wei Guo, Junfeng Ren, Zhanli Ren, Zhanli Ren, Haoyu Song, Guoqing Liu   +7 more
doaj   +1 more source

TWO PULSES OF MAGMATIC ACTIVITY DURING THE EARLY RIPHEAN KUONAMKA IGNEOUS PROVINCE FORMATION: PALEOMAGNETIC SUBSTANTIATION OF THE HYPOTHESIS

Геодинамика и тектонофизика
By the beginning of the 20th century, at least ten different generations of intrusive mafic bodies 1800–900 Ma were distinguished on the territory of the Anabar massif.
A. M. Pasenko, I. V. Fedyukin, V. E. Pavlov   +2 more
doaj   +1 more source

Anoxia in the terrestrial environment during the late Mesoproterozoic [PDF]

Geology, 2013
A significant body of evidence suggests that the marine environment remained largely anoxic throughout most of the Precambrian. In contrast, the oxygenation history of terrestrial aquatic environments has received little attention, despite the significance of such settings for early eukaryote evolution.
Cumming, V.M., Poulton, S.W., Rooney, A.D., Selby, D.   +3 more
openaire   +4 more sources