Fen Complex - Wikipedia
The Fen Complex (Norwegian: Fensfeltet) in Nome, Telemark, Norway is a region noted for an unusual suite of igneous rocks. Several varieties of carbonatite are present in the area as well as lamprophyre, ijolite and other highly alkalic rocks. It is the type locality for fenite, a metasomatic rock commonly found around carbonatite and alkali ...
Fenites associated with carbonatite complexes: A review
2018年2月1日 · Intrusions of both carbonatite and alkaline rocks are typically found in close spatial relationship with aureoles of high temperature metasomatically altered country rock, termed fenites. These alteration aureoles have great potential as exploration indicators.
Enormous deposit of rare earth elements discovered in heart of …
2024年6月12日 · The deposit, known as the Fen Carbonatite Complex, sits southwest of Oslo near Lake Norsjø. Some 580 million years ago, the complex was the pipe of an active volcano.
The Fen Carbonatite Complex - REE
The Fen Carbonatite Complex is the largest known REE deposit of the carbonatite type in Europe and Rare Earths Norway (REN) is currently performing core-drilling and beneficiation tests to examine the deposit in greater detail.
Hydrothermal processes in the Fen alkaline-carbonatite complex ...
2019年8月1日 · We present detailed textural and chemical analyses of the hydrothermal sulfide- and REE-Th-Nb-mineralization observed in the Fen complex (southern Norway), which is the biggest carbonatite-related REE and Th deposit in Europe.
The hydrothermal alteration of carbonatite in the Fen Complex, …
The Fen Complex in Norway consists of a ~583 Ma composite carbonatite-ijolite-pyroxenite diatreme intrusion. Locally, high grades (up to 1.6 wt.% total REE) of rare-earth elements (REE) are found in a hydrothermally altered, hematite-rich carbonatite known as rødbergite.
Primary inclusions of burbankite in carbonatites from the Fen …
2021年1月28日 · Burbankite, a petrogenetically important Na-Ca-Sr-Ba-LREE carbonate, was identified at the Fen carbonatite complex for the first time. This mineral forms abundant inclusions in magmatic calcite, dolomite and fluorapatite.
Pb isotope geochemistry of the Fen carbonatite complex, S.E.
1988年1月1日 · Eighteen samples of carbonatites and associated silicate rocks from the Fen complex, southeast Norway, define a whole-rock Pb/Pb isochron (MSWD 3.63) with an age of 539 ± 14 Ma and a single-stage model μ value of 8.15. The samples show an extreme range of 206 Pb/ 204 Pb from 18.9 to 226, which correlates with the abundance of apatite in the rocks.
Fenites associated with carbonatite complexes: A review
2017年12月1日 · Cooling and crystallizing carbonatitic and alkaline melts expel multiple pulses of alkali-rich aqueous fluids which metasomatize the surrounding country rocks, forming fenites during a process...
(PDF) The hydrothermal alteration of carbonatite in the Fen …
2017年8月31日 · We present textural evidence for REE-fluorocarbonates and apatite breaking down in igneous carbonatite, and monazite- (Ce) precipitating in rødbergite. We highlight the importance of micro-veins,...