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Formation of High-Mg Diorites through Assimilation of Peridotite by Monzodiorite Magma at Crustal Depths

QIAN, Qing; Hermann, Joerg

Description

The 134-130 Ma Han-Xing diorite-monzodiorite complex intrudes the central part of the North China block (NCB). The high-Mg diorites have intermediate SiO2, high MgO, Cr and Ni contents, elevated Mg-numbers (Mg#), and are characterized by high Sr and Ba, highly fractionated rare earth elements (REE), and strong Nb and Ta depletions.These geochemical signatures are similar to those of high-Mg adakite and sanukitoid magmas that form through complex crust-mantle interactions. We have investigated...[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
URI: http://hdl.handle.net/1885/55782
Source: Journal of Petrology
DOI: 10.1093/petrology/egq023

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