TRACE ELEMENT AND Sr-Nd ISOTOPE GEOCHEMISTRY OF FLUORITE FROM THE XIANGSHAN URANIUM DEPOSIT, SOUTHEAST CHINA

2006 ◽  
Vol 101 (8) ◽  
pp. 1613-1622 ◽  
Author(s):  
Y.-h. Jiang ◽  
H.-f. Ling ◽  
S.-y. Jiang ◽  
W.-z. Shen ◽  
H.-h. Fan ◽  
...  
Keyword(s):  
Trace Element ◽  
Uranium Deposit ◽  
Isotope Geochemistry ◽  
Nd Isotope ◽  
Southeast China

Tertiary picrites of West Greenland: Petrogenetic implications of trace element & Sr-Nd isotope geochemistry

1988 ◽  
Vol 70 (1-2) ◽  
pp. 49 ◽  
Author(s):  
P.M. Holm ◽  
R.C.O. Gill ◽  
A.K. Pedersen ◽  
J.G. Larsen ◽  
N. Hald ◽  
...  
Keyword(s):  
Trace Element ◽  
Isotope Geochemistry ◽  
Nd Isotope ◽  
West Greenland

scholarly journals Major-trace element and Sr-Nd isotope compositions of mafic dykes of the Singhbhum Craton: Insights into evolution of the lithospheric mantle

Lithos ◽  
2021 ◽  
Vol 382-383 ◽  
pp. 105959
Author(s):  
Om Prakash Pandey ◽  
Klaus Mezger ◽  
Dewashish Upadhyay ◽  
Debajyoti Paul ◽  
Ajay Kumar Singh ◽  
...  
Keyword(s):  
Trace Element ◽  
Lithospheric Mantle ◽  
Nd Isotope ◽  
Mafic Dykes ◽  
Singhbhum Craton

Trace element and helium isotope geochemistry of the Cenozoic intraplate volcanism in the East Sea (Sea of Japan): Implications for lithosphere-asthenosphere interaction

Lithos ◽  
2021 ◽  
Vol 388-389 ◽  
pp. 106075
Author(s):  
Wonhee Lee ◽  
Hyunwoo Lee ◽  
Donghwan Kim ◽  
Jonguk Kim ◽  
Jihye Oh ◽  
...  
Keyword(s):  
Trace Element ◽  
Sea Of Japan ◽  
Isotope Geochemistry ◽  
East Sea ◽  
Helium Isotope ◽  
Intraplate Volcanism

scholarly journals Ore and Geochemical Specialization and Substance Sources of the Ural and Timan Carbonatite Complexes (Russia): Insights from Trace Element, Rb–Sr, and Sm–Nd Isotope Data

Minerals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 711
Author(s):  
Irina Nedosekova ◽  
Nikolay Vladykin ◽  
Oksana Udoratina ◽  
Boris Belyatsky
Keyword(s):  
Trace Element ◽  
Mantle Source ◽  
Crustal Evolution ◽  
Trace Element Data ◽  
The Urals ◽  
Nd Isotope ◽  
Enriched Mantle ◽  
Depleted Mantle ◽  
Mantle Sources ◽  
Geochemical Specialization

The Ilmeno–Vishnevogorsk (IVC), Buldym, and Chetlassky carbonatite complexes are localized in the folded regions of the Urals and Timan. These complexes differ in geochemical signatures and ore specialization: Nb-deposits of pyrochlore carbonatites are associated with the IVC, while Nb–REE-deposits with the Buldym complex and REE-deposits of bastnäsite carbonatites with the Chetlassky complex. A comparative study of these carbonatite complexes has been conducted in order to establish the reasons for their ore specialization and their sources. The IVC is characterized by low 87Sr/86Sri (0.70336–0.70399) and εNd (+2 to +6), suggesting a single moderately depleted mantle source for rocks and pyrochlore mineralization. The Buldym complex has a higher 87Sr/86Sri (0.70440–0.70513) with negative εNd (−0.2 to −3), which corresponds to enriched mantle source EMI-type. The REE carbonatites of the Chetlassky сomplex show low 87Sr/86Sri (0.70336–0.70369) and a high εNd (+5–+6), which is close to the DM mantle source with ~5% marine sedimentary component. Based on Sr–Nd isotope signatures, major, and trace element data, we assume that the different ore specialization of Urals and Timan carbonatites may be caused not only by crustal evolution of alkaline-carbonatite magmas, but also by the heterogeneity of their mantle sources associated with different degrees of enrichment in recycled components.

scholarly journals Trace-element and Nd-isotope systematics in detrital apatite of the Po river catchment: Implications for provenance discrimination and the lag-time approach to detrital thermochronology

Lithos ◽  
2017 ◽  
Vol 290-291 ◽  
pp. 48-59 ◽  
Author(s):  
Marco G. Malusà ◽  
Jiangang Wang ◽  
Eduardo Garzanti ◽  
Zhi-Chao Liu ◽  
Igor M. Villa ◽  
...  
Keyword(s):  
Trace Element ◽  
Lag Time ◽  
Po River ◽  
Nd Isotope ◽  
River Catchment ◽  
Isotope Systematics

scholarly journals Nd-Hf isotope geochemistry and lithogeochemistry of the Rambler Rhyolite, Ming VMS deposit, Baie Verte Peninsula, Newfoundland: evidence for slab melting and implications for VMS localization

2021 ◽  
Author(s):  
S J Piercey ◽  
J -L Pilote
Keyword(s):  
Rare Earth ◽  
Trace Element ◽  
Isotope Geochemistry ◽  
Primitive Mantle ◽  
Isotopic Data ◽  
Depleted Mantle ◽  
Element Enrichment ◽  
Felsic Volcanic ◽  
Magmatic History ◽  
Felsic Rocks

New high precision lithogeochemistry and Nd and Hf isotopic data were collected on felsic rocks of the Rambler Rhyolite formation from the Ming volcanogenic massive sulphide (VMS) deposit, Baie Verte Peninsula, Newfoundland. The Rambler Rhyolite formation consists of intermediate to felsic volcanic and volcaniclastic rocks with U-shaped primitive mantle normalized trace element patterns with negative Nb anomalies, light rare earth element-enrichment (high La/Sm), and distinctively positive Zr and Hf anomalies relative to surrounding middle rare earth elements (high Zr-Hf/Sm). The Rambler Rhyolite samples have epsilon-Ndt = -2.5 to -1.1 and epsilon-Hft = +3.6 to +6.6; depleted mantle model ages are TDM(Nd) = 1.3-1.5 Ga and TDM(Hf) = 0.9-1.1Ga. The decoupling of the Nd and Hf isotopic data is reflected in epsilon-Hft isotopic data that lies above the mantle array in epsilon-Ndt -epsilon-Hft space with positive ?epsilon-Hft values (+2.3 to +6.2). These Hf-Nd isotopic attributes, and high Zr-Hf/Sm and U-shaped trace element patterns, are consistent with these rocks having formed as slab melts, consistent with previous studies. The association of these slab melt rocks with Au-bearing VMS mineralization, and their FI-FII trace element signatures that are similar to rhyolites in Au-rich VMS deposits in other belts (e.g., Abitibi), suggests that assuming that FI-FII felsic rocks are less prospective is invalid and highlights the importance of having an integrated, full understanding of the tectono-magmatic history of a given belt before assigning whether or not it is prospective for VMS mineralization.

scholarly journals Major and Trace Element and Sr-Nd-Pb-Hf Isotope Geochemistry of the Fonualei Ridge Spreading Centre, northeast Lau Basin: Mixing between Indian upper mantle and a Samoan Plume Component

2021 ◽  
Author(s):  
Avrinder Singh Sandhu ◽  
Kaj Hoernle ◽  
Maxim Portnyagin ◽  
Reinhard Werner ◽  
Folkmar Hauff ◽  
...  
Keyword(s):  
Trace Element ◽  
Upper Mantle ◽  
Isotope Geochemistry ◽  
Hf Isotope ◽  
Lau Basin
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