Results 181 to 190 of about 153,773 (348)
Th/U ratios in metamorphic zircon
C. Yakymchuk, C. Kirkland, C. Clark
semanticscholar +1 more source
ABSTRACT The early Miocene unconformity (EMU) formed during a transition in the tectonic regime of western North America that coincided with faunal diversification. The Railroad Canyon section in the northern Rocky Mountains provides a complete geologic record around this event. Our new magnetostratigraphic study in combination with published U‐Pb ages
Dieke Gerritsen +3 more
wiley +1 more source
ABSTRACT The Carboniferous‐Permian Tarija basin of southern Bolivia evolved under major tectonic and climatic influence. The timing of transition from glacially influenced to arid conditions, after the Gondwanide tectonic event, has been based mainly on palynological correlations.
Felipe R. Ferroni +4 more
wiley +1 more source
Geochemistry and detrital zircon U-Pb-Hf isotopic data reveal the provenance and tectonic setting of the Xujiahe Formation. [PDF]
Xie F +6 more
europepmc +1 more source
The boundary between the Central Asian Orogenic belt and Tethyan tectonic domain deduced from Pb isotopic data [PDF]
Castillo, Paterno R +7 more
core +1 more source
P‐T‐t‐d Evolution of Low‐Grade Metamorphic Xenotime, Eastern Alps (Austria)
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

