Magmatic (silicates/saline/sulfur-rich/CO2) immiscibility and zirconium and rare-earth element enrichment from alkaline magma chamber margins: evidence from Ponza Island, Pontine Archipelago, Italy

1997 ◽  
Vol 8 (6) ◽  
pp. 1401-1420 ◽  
Author(s):  
Harvey E. Belkin ◽  
Benedetto De Vivo ◽  
Annamaria Lima ◽  
Kálmán Török
Keyword(s):  
Rare Earth ◽  
Magma Chamber ◽  
Rare Earth Element ◽  
Earth Element ◽  
Alkaline Magma ◽  
Element Enrichment

scholarly journals Primary rare earth element enrichment in carbonatites: Evidence from melt inclusions in Ulgii Khiid carbonatite, Mongolia

2020 ◽  
Vol 117 ◽  
pp. 103294 ◽  
Author(s):  
Meng Feng ◽  
Wenlei Song ◽  
Jindrich Kynicky ◽  
Martin Smith ◽  
Clinten Cox ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Melt Inclusions ◽  
Element Enrichment

scholarly journals Notes on Contributions to the Science of Rare Earth Element Enrichment in Coal and Coal Combustion Byproducts

Minerals ◽  
2016 ◽  
Vol 6 (2) ◽  
pp. 32 ◽  
Author(s):  
James Hower ◽  
Evan Granite ◽  
David Mayfield ◽  
Ari Lewis ◽  
Robert Finkelman
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Coal Combustion ◽  
Earth Element ◽  
Element Enrichment

Rare Earth Element Enrichment in Late Archean Manganese Deposits from the Iron Ore Group, East India

2008 ◽  
Vol 58 (4) ◽  
pp. 402-413 ◽  
Author(s):  
Takeru Moriyama ◽  
Mruganka K. Panigrahi ◽  
Dinesh Pandit ◽  
Yasushi Watanabe
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Iron Ore ◽  
Earth Element ◽  
Manganese Deposits ◽  
Element Enrichment

New petrological and geochemical data on mid-Paleozoic island-arc volcanics of northern Sierra Nevada, California: evidence for a continent-based island arc

1989 ◽  
Vol 26 (12) ◽  
pp. 2465-2478 ◽  
Author(s):  
O. Rouer ◽  
H. Lapierre ◽  
C. Coulon ◽  
A. Michard
Keyword(s):  
Rare Earth ◽  
Sierra Nevada ◽  
Rare Earth Element ◽  
Earth Element ◽  
Island Arc ◽  
Geochemical Data ◽  
Light Rare Earth ◽  
Calc Alkaline ◽  
Strong Light ◽  
Element Enrichment

The mid-Paleozoic volcanics of northern Sierra Nevada consist of the Sierra Buttes rhyolites, the Taylor basalts and andesites, and the Keddie Ridge basalt–latite–rhyolite suite. The Sierra Buttes calc-alkaline rhyolites display strong light rare-earth element enrichment and negative εNd values. The Taylor basalts and andesites in the northern Hough and Genesee blocks exhibit calc-alkaline affinities (REE rare-earth element patterns highly enriched in LREE), whereas in the southern Hough block they are tholeiitic (flat rare-earth element patterns). The abundance of silicic lavas, the low εNd values of both the Sierra Buttes and Taylor volcanics and the δ18O values of the Sierra Buttes rhyolite and Bowman Lake trondjhemite provide evidence that the northern Sierra Nevada island arc was continent based. The Keddie Ridge differentiated volcanics, characterized by high Zr, Y, Nb, K, and light rare-earth elements, are geochemically similar to a shoshonite suite. Their eruption at the end of the mid-Paleozoic volcanic episode suggests a reversal of subduction, uplift, and block faulting in the island arc.The mid-Paleozoic volcanics of the northern Sierra Nevada are thought to represent the remnant of a mature island arc because calc-alkaline rocks predominate over tholeiitic ones, the lavas display a K enrichment with time, and the volcanics are evolved in their isotopes, compared with rocks erupted in young or primitive island arcs.

EVIDENCE OF RARE EARTH ELEMENT ENRICHMENT IN SEDIMENTARY ROCKS FROM PENNSYLVANIA

2016 ◽  
Author(s):  
Tracy L. Bank ◽  
◽  
Elliot Roth ◽  
Bret Howard ◽  
Evan Granite
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Sedimentary Rocks ◽  
Element Enrichment

scholarly journals Rare earth element enrichment using membrane based solvent extraction

2017 ◽  
Author(s):  
I. G. B. N. Makertiharta ◽  
P. T. Dharmawijaya ◽  
M. Zunita ◽  
I. G. Wenten
Keyword(s):  
Rare Earth ◽  
Solvent Extraction ◽  
Rare Earth Element ◽  
Earth Element ◽  
Element Enrichment

Albitization at 1700 ± 2 Ma in the Sudbury – Wanapitei Lake area, Ontario: implications for deep-seated alkalic magmatism in the Southern province

1994 ◽  
Vol 31 (3) ◽  
pp. 597-607 ◽  
Author(s):  
E. S. Schandl ◽  
M. P. Gorton ◽  
D. W. Davis
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Spatial Association ◽  
Gold Deposits ◽  
Low Ph ◽  
Lake Area ◽  
Sudbury Igneous Complex ◽  
Two Generations ◽  
Element Enrichment

U–Pb geochronology of hydrothermal monazite in albitized rocks from two gold deposits east of the Sudbury complex indicates that albitization in the Sudbury – Wanapitei Lake area occurred at 1700 ± 2 Ma and was coeval with a period of granitic plutonism in the Southern structural province between 1750 and 1700 Ma.A variety of rare earth element (REE) minerals, such as two generations of hydrothermal monazite, bastnäsite, synchysite, and gadolinite were identified in the albitized Huronian sediments in the Espanola – Sudbury – Wanapitei Lake areas. The presence of these REE minerals, the extraordinary light rare earth element enrichment in rocks from the Sheppard gold property east of the Sudbury igneous complex and the elevated REE concentrations in some albitized rocks suggests that sodium-rich fluids may have been generated by carbonatitic or alkalic intrusions at depth.Gold mineralization occurs in rocks that have been altered by at least two different types of fluids: (1) peralkaline; Na–REE bearing and (2) low pH, Co bearing. The high Co content of most mineralized samples and the relatively weak correlation between Au and Na2O suggests that gold was probably concentrated to economic grade by the low pH, Co-bearing fluids. The spatial association of albite and gold suggests that the albitized rocks may represent earlier fluid conduits that were subsequently refractured and invaded by the mineralizing solutions.

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