Petrology of iron-rich magmatic segregations associated with strongly peraluminous trondhjemite in the Cornucopia stock, northeastern Oregon

Autor:	Calvin G. Barnes, Kenneth Johnson, Haraldur R. Karlsson, James M Browning
Rok vydání:	2002
Předmět:	Dike geography geography.geographical_feature_category Pluton Geochemistry engineering.material Geophysics Geochemistry and Petrology Mineral redox buffer Crater lake engineering Plagioclase Mafic Petrology Biotite Geology Hornblende
Zdroj:	Contributions to Mineralogy and Petrology. 142:564-581
ISSN:	1432-0967 0010-7999
Popis:	The Middle Cretaceous Cornucopia stock in the Blue Mountains of northeastern Oregon is a small composite intrusion consisting of hornblende biotite tonalite, biotite trondhjemite, and three cordierite two mica trondhjemite units. Unusual magnetite + biotite-rich tonalitic rocks are associated with the Crater Lake cordierite trondhjemite, the youngest of the intrusions. Oxide-rich tonalites are characterized by high Fe (~47–68 wt% total Fe as FeO), low SiO2 (
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ab092e3d10968e615bfc246185da82b1 https://doi.org/10.1007/s00410-001-0311-z Zobrazit plný text záznamu Full text from SpringerLink