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metabasalt

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Journal Article
Published: 01 July 2022
Russ. Geol. Geophys. (2022) 63 (7): 755–771.
... of chlorite, actinolite, epidote, and albite with quartz, titanite, ilmenite, and magnetite impurity. The metabasalts have is an age of 915 ± 5 Ma (zircon U–Pb dating) and are characterized by wide variations in ε Nd ( T ) (–3.5 to –11.9) and 87 Sr/ 86 Sr (0.70602–0.70732) and high δ 18 O values (9.0–15.2...
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Journal Article
Journal: Geology
Published: 25 February 2022
Geology (2022) 50 (5): 577–582.
... the world's oldest-known subhorizontal mega-scale sheath fold from Archean Alpine-style nappes of the Central orogenic belt, North China craton. The Zanhuang nappes are recumbent Alpine-style forearc-affinity metabasaltic and metasedimentary nappes emplaced over a passive continental margin in the Archean...
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Journal Article
Journal: GSA Bulletin
Published: 14 February 2022
GSA Bulletin (2022) 134 (9-10): 2503–2530.
... geochronological and geochemical data. The metabasites show back-arc basalt–like geochemical features, marked by high Zr/Nb ratios and Zr-Hf troughs, but they can be classified into two groups based on their dissimilar protolith ages and distinct Nd signatures. Most group I metabasaltic rocks were emplaced before...
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