Results 121 to 130 of about 29,296 (274)

Neoproterozoic backarc basin: Sensitive high-resolution ion microprobe U-Pb and Sm-Nd isotopic evidence from the Eastern Pampean Ranges, Argentina [PDF]

, 2007
The Eastern Pampean Ranges comprise high-grade supracrustal sequences with linear belts of mafic-ultramafic bodies representing ophiolite remnants. New U-Pb and Nd isotopic data suggest that the tectonic evolution of the Pampean Ranges started ca. 640 Ma
Escayola, Monica Patricia, Armstrong, Richard, Pimentel, Márcio M.   +2 more
core   +1 more source

Peixe Zircon as a Quality Control Reference Material in U‐Pb Geochronology by LA‐ICP‐MS

Geostandards and Geoanalytical Research, Volume 50, Issue 2, Page 369-389, June 2026.
Key Points Peixe#0 zircon was characterised for U‐Pb geochronology using CA‐ID‐TIMS, SIMS and a long‐term LA‐ICP‐MS data set. The consistent results establish Peixe#0 as a reference material for U‐Pb quality control. Trace element heterogeneity requires careful, CL‐guided spot selection.
Margareth Sugano Navarro, Erica Martini Tonetto, Elson P. Oliveira, Mauricio Ibañez‐Mejia, Cristina Talavera, Neal J. McNaughton, Jacinta Enzweiler, Michael Wiedenbeck   +7 more
wiley   +1 more source

Data and supplementary files for: Rare earth element geochemistry of Australian Neoproterozoic carbonate: Constraints on the Neoproterozoic oxygenation events

, 2019
Data and supplementary files for "Rare earth element geochemistry of Australian Neoproterozoic carbonate: Constraints on the Neoproterozoic oxygenation ...
Ai Nguyen (7514582), Nicole Leonard (7514579), Jack Ward (521635), Charles Verdel (4027718), Matthew Campbell (1432708)   +4 more
core   +1 more source

Disentangling palaeoecological and outcrop controls on MISS occurrence in c. 1 Ga fluvio‐lacustrine facies of the Diabaig Formation, Scotland

Sedimentology, Volume 73, Issue 4, Page 883-913, June 2026.
ABSTRACT The c. 1 Ga Diabaig Formation of north‐west Scotland preserves diverse lacustrine and fluvial facies and abundant microbial and non‐microbial surficial sedimentary features. 172.6 m of section was logged across seven localities to assess the distribution of microbially induced sedimentary structures (MISS) relative to lithofacies, substrate ...
Seán T. Herron, Neil S. Davies, William J. McMahon   +2 more
wiley   +1 more source

A tale of two microbialites: Stromatolites and microbially induced sedimentary structures

Sedimentology, Volume 73, Issue 4, Page 849-863, June 2026.
ABSTRACT Microbialites are biosedimentary structures built by microbial mats. Five microbialite groups are distinguished: stromatolites, thrombolites, dendrolites, leiloites and microbially induced sedimentary structures (MISS). This contribution discusses the two most abundant microbialite groups in marine settings, stromatolites and MISS.
Nora Noffke, Stanley M. Awramik
wiley   +1 more source

The Neoproterozoic sedimentary record from Tandilia System, Argentina

, 2012
The Tandilia System is an orographic belt located in the Buenos Aires Province, Argentina, which a maximum length of 350 km orientated in a NW-SE direction.
Poire, Daniel Gustavo
core  

Microbially induced sedimentary structures in fluvial settings: the gas domes from the Bolzano Megacaldera (Permian, Italy)

Sedimentology, Volume 73, Issue 4, Page 914-944, June 2026.
ABSTRACT Gas domes serve as some of the earliest and most persisting indicators of life on Earth, yet their documentation in continental environments remains sparse. This study aims to bridge this gap by examining gas domes within the Permian fluvial succession of Monte Luco, located in the caldera of the Bolzano Supervolcano. These structures occur as
Andrea Baucon, Steffen Trümper, Corrado Morelli, Carlos Neto de Carvalho, Roberto Cabella, Evelyn Kustatscher   +5 more
wiley   +1 more source

Raman spectra analysis and comparison of Neoproterozoic organic-walled mesofossils

, 2012
Skeletal material first appears in the rock record in the terminal Ediacaran, leaving most of the Earth’s history only to minute organic fossils. Aside from abundant acritarchs (unicellular organic-walled phytoplankton) present from at least ~2.5 Ga ...
Moczydłowska, Małgorzata,, Agić, Heda,   +1 more
core  

Reworking of the Tarim Craton by underplating of mantle plume-derived magmas: Evidence from Neoproterozoic granitoids in the Kuluketage area, NW China

, 2011
Most Neoproterozoic granitoids in the Kuluketage area, northern Tarim Craton are characterized by strongly depleted HREE abundances and high Sr/Y and (La/Yb) N ratios, showing typical geochemical features of adakitic rocks.
Chao Yuan, Xiaoping Long, Yuan, C., Long, X., Zhao, GC, Zhao, G, Sun, M, Long, X, Kröner, A, Long, XP, Wilde, S, Hu, A, Alfred Kröner, Hu, A., Kröner, A., Wilde, Simon, Sun, M., Guochun Zhao, Hu, AQ, Min Sun, Aiqin Hu, Yuan, C, Simon Wilde, Zhao, G.   +23 more
core   +1 more source

Phosphorus-limited conditions in the early Neoproterozoic ocean maintained low levels of atmospheric oxygen

Nature Geoscience, 2020
R. Guilbaud, S. Poulton, Jennifer Thompson, K. Husband, Maoyan Zhu, Ying Zhou, G. Shields, T. Lenton   +7 more
semanticscholar   +1 more source