Results 141 to 150 of about 31,568 (232)
P‐T‐t‐d Evolution of Low‐Grade Metamorphic Xenotime, Eastern Alps (Austria)
Terra Nova, EarlyView.ABSTRACT In situ LA‐ICP‐MS U‐Pb dating of xenotime was used to establish the age of low‐grade metamorphism in Permian metasediments of the Austroalpine Unit (Eastern Alps, Austria). Complexly zoned xenotime in chloritoid‐bearing metasedimentary samples possesses distinct MREE‐rich domains. In the eastern sample, this domain yielded a date of c. 135 Ma,
M. S. Hollinetz +4 more
wiley +1 more source
Terra Nova, EarlyView.ABSTRACT Deep crustal fragments and structural lineaments identified through satellite gravity data provide evidence for the extension of the reworked ancient basement of the Central African Block into the northern São Francisco Craton and southern Borborema Province.
Douglas Teixeira Martins +3 more
wiley +1 more source
Cryogenian Glacial Erosion and Tectonics as Agents of Crustal Recycling
Terra Nova, EarlyView.ABSTRACT Zircon preserves evidence of recycling processes that link surface environments to the mantle. Combined δ18O‐εHf in zircon fingerprints magmatic sources and tracks how crustal material is reworked over time. We apply statistical analyses to a global compilation that apparently resolves shifts in zircon U–Pb, δ18O, and Lu‐Hf data spanning the ...
M. Seraine +9 more
wiley +1 more source
A global overview of pterosaur ichnology: tracksite distribution in space and time [PDF]
, 2008 Harris, Jerald D. +2 more
core +1 more source
Terra Nova, EarlyView.ABSTRACT The Transbrasiliano‐Kandi‐4°50′ (TK4) shear zone in western Gondwana crosscuts South America and NW Africa for at least 6000 km. Despite its impressive size, the timing of the main episode of dextral ductile shearing is uncertain. We present detailed in situ multi‐mineral geochronology of mylonites from both Brazil and Algeria supporting that ...
F. A. Caxito +4 more
wiley +1 more source
Giant Porphyry Copper Deposits Caused by a Slab Jamming in the Mantle Transition Zone
Terra Nova, EarlyView.ABSTRACT Two giant porphyry copper deposits in the Southern Central Andes formed during the Miocene–Pliocene transition when a bend in the subducting Juan de Fernández hotspot chain jammed in the mantle transition zone, causing mega‐scale slab‐kinking. This geometry implies mechanical resistance that caused East–West compression and eventually a thrust‐
Nipaporn Nakrong +5 more
wiley +1 more source
Palatal morphology predicts the paleobiology of early salamanders
, 2022 Jia Jia, Guangzhao Li, Ke‐Qin Gao
openalex +1 more source
Moving Beyond Morphology: Genomic Insights Into Evolutionary Histories of Haplosclerid Sponges
Zoologica Scripta, EarlyView.ABSTRACT Accurate taxonomic identification is essential for defining species boundaries and understanding biodiversity. However, this remains challenging for groups where morphological character evolution is poorly understood or diagnostic traits are absent.
Joëlle van der Sprong +6 more
wiley +1 more source
Microstructural design of the stalk in the crinoid Seirocrinus supports its pseudoplanktonic lifestyle. [PDF]
Sci RepGorzelak P +3 more
europepmc +1 more source