Metasomatic alkali-feldspar syenites (episyenites) of the Proterozoic Suomenniemi rapakivi granite complex, southeastern Finland
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DOI: 10.1016/j.lithos.2017.09.017
Abstract: Abstract Peralkaline to marginally metaluminous alkali-feldspar syenites and quartz alkali-feldspar syenites are hosted by subalkaline, ferroan rapakivi granites in the 1644 Ma Suomenniemi complex of southeastern Finland. These alkali syenites form NW-oriented dikes and small (… read more here.
Keywords: suomenniemi; feldspar; feldspar syenites; complex southeastern ... See more keywords
Constraints of Hydrothermal and Magmatic Zircon on the Origin of the Yaogangxian Tungsten Deposit, Southern China
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DOI: 10.1016/j.oregeorev.2018.07.011
Abstract: Abstract The Yaogangxian tungsten deposit, located in the central Nanling Range, is a well-known vein-type tungsten deposit and has been mined for centuries. This study focuses on the morphology, geochronology, and geochemistry of zircon crystals… read more here.
Keywords: feldspar granite; zircon; alkali feldspar; tungsten deposit ... See more keywords
Crystallographic orientation relationships between quartz and feldspar in myrmekite: a case study in monzodiorite from Meichuan pluton, China
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DOI: 10.1180/mgm.2021.39
Abstract: Abstract Myrmekites occurring in monzodiorite from the Meichuan pluton in the Dabie ultrahigh-pressure metamorphic belt were investigated. The petrographic evidence demonstrates a metasomatic origin for myrmekite formation at the scale of individual alkali feldspar grains,… read more here.
Keywords: plagioclase; crystallographic orientation; alkali feldspar; feldspar ... See more keywords