K-Rich Cumulate Diorite at the Base of a Tilted Granodiorite Pluton from the New England Batholith, Australia

Autor:	R. H. Flood, S. E. Shaw
Rok vydání:	1979
Předmět:	New england Batholith Metamorphic rock Pluton Geochemistry Foliation (geology) Geology Mafic Petrology Diorite
Zdroj:	The Journal of Geology. 87:417-425
ISSN:	1537-5269 0022-1376
DOI:	10.1086/628429
Popis:	Petrological, isotopic, and gravity data for a massive granodiorite with K-rich biotite-diorite and tonalite variants in the New England Batholith, Australia, indicate that the more mafic rock types form the lower parts of a pluton that has been tilted so as to expose the base along its southwestern margin. The mafic rocks are inferred to be cumulates of refractory and phenocrystal phases and not the products of independent K-rich basic magmas. This evidence of tilting in the unfoliated granodiorite Uralla pluton suggests that granite samples should be used cautiously in palaeomagnetic-palaeolatitude studies, for the absence of metamorphic foliation is not sufficient evidence that the granite has not been tilted.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5ef0d05a646c5b26889fe578a1d3e124 https://doi.org/10.1086/628429 Zobrazit plný text záznamu