The Shahewan rapakivi-textured granite-quartz monzonite pluton, Qinling orogen, central China: Mineral composition and petrogenetic significance [PDF]
Bulletin of the Geological Society of Finland, 2002 The Mesozoic Shahewan pluton consists of four texturally different types of biotite-hornblende quartz monzonite. In the porphyritic types alkali feldspar occurs as euhedral or ovoidal megacrysts that are often mantled by one or more plagioclase shells ...
X. Wang, T. Wang, I. Haapala, X. Lu
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Secular Evolution of Continents and the Earth System
Reviews of Geophysics, Volume 60, Issue 4, December 2022., 2022 Abstract Understanding of secular evolution of the Earth system is based largely on the rock and mineral archive preserved in the continental lithosphere. Based on the frequency and range of accessible data preserved in this record, we divide the secular evolution into seven phases: (a) “Proto‐Earth” (ca. 4.57–4.45 Ga); (b) “Primordial Earth” (ca. 4.45–
Peter A. Cawood +6 more
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Geochronology of the Suomenniemi rapakivi granite complex revisited: Implications of point-specific errors on zircon U-Pb and refined λ87 on whole-rock Rb-Sr [PDF]
Bulletin of the Geological Society of Finland, 2015 Multi-grain isotope dilution and secondary ion microprobe zircon U-Pb as well as wholerock Rb-Sr isotope dilution data on the late Paleoproterozoic Suomenniemi rapakivi granite complex (exposed on the northern flank of the Wiborg batholith in ...
O.T. Rämö, I. Mänttäri
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Review on geology and mineralization of North Korea (I: Precambrian)
Resource Geology, Volume 71, Issue 4, Page 492-513, October 2021., 2021 The Precambrian geotectonic provinces of North Korea contain continental cores and massifs, active continental margins, and rift zones. The Precambrian strata between the eastern North China Craton (NCC) and North Korea are newly correlated considering rearranged stratigraphy in this review.
Bum Han Lee +3 more
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Terra Nova, Volume 33, Issue 5, Page 502-510, October 2021., 2021 Abstract Fault‐ and fracture‐hosted multi‐stage mineral assemblages that formed by fracture reactivation and fluid migration, constitute archives of the tectonic evolution of Precambrian cratons. Complex intergrowth patterns of these mineral records often hinder absolute dating of mineralization events for geological models.
Mikael Tillberg +5 more
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Plagioclase-mantled K-feldspar in the Carboniferous porphyritic microgranite of Altenberg-Frauenstein, Eastern Erzgebirge / Krušné Hory [PDF]
Bulletin of the Geological Society of Finland, 2002 The Upper Carboniferous porphyritic microgranite of Altenberg-Frauenstein, formerly known as Granitporphyr (Dalmer 1896) and here abbreviated as GP, forms a 36 km long and up to 18 km wide complex of ring dykes related to the Teplice-Altenberg caldera in
A. Müller, R. Seltmann
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The Proterozoic granitoids of Finland: Granite types, metallogeny and relation to crustal evolution [PDF]
Bulletin of the Geological Society of Finland, 1986 The granitoids are divided into four main groups: synkinematic (1860‒1930 Ma, most commonly 1870‒1890 Ma), late-kinematic (1800‒1850 Ma) and postkinematic (ca. 1800 Ma) Svecokarelian granitoids, and anorogenic rapakivi granites (1540‒1700 Ma).
P.A. Nurmi, I. Haapala
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Boulder of orbicular rapakivi in Taivassalo, southwestern Finland [PDF]
Bulletin of the Geological Society of Finland, 1983 A boulder of an orbicular rapakivi was found in Taivassalo, close to the southern contact of the Vehmaa rapakivi area in southwestern Finland. Many features, e.g.
N. Edelman
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Remanent magnetization of two intrusive bodies in southeastern Finland [PDF]
Bulletin of the Geological Society of Finland, 1978 Direction of natural remanent magnetization (NRM) was measured for a diabase from the intrusive contact of rapakivi granite (1650 Ma) and for a granodiorite intrusion (1810 Ma).
K.J. Neuvonen
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Geoheritage Meaning of Artificial Objects: Reporting Two New Examples from Russia
Heritage, 2021 Geoheritage is not necessarily linked genetically to “purely” geological processes. Investigations in two urban areas of Russia allowed us to find essentially artificial objects demonstrating certain geological uniqueness.
Anna V. Mikhailenko +2 more
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