Trace element geochemistry of carbonates in the Jurassic Lusitanian Basin records mineral-fluid interactions

Carbonate rocks in sedimentary basins are reactive and can record complex histories of events associated with fluid flow in these basins. These include processes of dolomitization and dedolomitization. In this work we provide some preliminary data where distinct calcite and dolomite generations in the Jurassic Lusitanian Basin were analysed by LA-ICP-MS for trace elements in order to characterize chemical signatures of fluid-mineral interaction. It was observed that different carbonate generations can preserve the range of certain trace metal concentrations, but later calcites have distinctly higher contents in REE, Th and U, and Ba. Dolomites also show distinct chemical signatures but lack of analytical and spatial resolution does not allow quantification of the precursor calcite relicts. However, these processes point to the action of basinal fluids triggered by distinct tectonic episodes and associated volcanic activity.

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Age of the Late Cretaceous Ultramafic-Hosted Giant Mascot Ni-Cu-PGE Deposit, Southern Canadian Cordillera: Integrating CA-ID-TIMS and LA-ICP-MS U-Pb Geochronology and Trace Element Geochemistry of Zircon*

Economic Geology ◽

10.5382/econgeo.2017.4514 ◽

2017 ◽

Vol 112 (6) ◽

pp. 1395-1418 ◽

Cited By ~ 6

Author(s):

Matthew J. Manor ◽

James S. Scoates ◽

Corey J. Wall ◽

Graham T. Nixon ◽

Richard M. Friedman ◽

...

Keyword(s):

Trace Element ◽

Late Cretaceous ◽

Trace Element Geochemistry ◽

Canadian Cordillera ◽

Element Geochemistry ◽

Icp Ms

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Trace element geochemistry of a Precambrian diabase dike from western Ontario

Canadian Journal of Earth Sciences ◽

10.1139/e77-255 ◽

1977 ◽

Vol 14 (12) ◽

pp. 2941-2944 ◽

Cited By ~ 12

Author(s):

J. Dostal ◽

M. Fratta

Keyword(s):

Trace Elements ◽

Trace Element ◽

Trace Element Geochemistry ◽

Element Geochemistry

A diabase dike of the Precambrian Mackenzie swarm from western Ontario has been sampled at two localities where it intrudes basaltic volcanics and granite respectively. The two profiles across the dike have rather similar contents of major and some trace elements (REE, U, Zr, Hf, Y, Nb, Sc, Co, Cr, and Sc) but differ in the abundances of K and related elements (Rb, Tl, Li, and Ba), which are significantly higher in the section of the dike intruding the granite. The differences can probably be attributed to selective contamination from granitic country rocks by diffusion.

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Mineralogical and geochemical characterisation of the Kipawa syenite complex, Quebec: implications for rare-earth element deposits

10.4095/329212 ◽

2022 ◽

Author(s):

S Matte ◽

M Constantin ◽

R Stevenson

Keyword(s):

Rare Earth ◽

Rare Earth Element ◽

Earth Element ◽

Crustal Contamination ◽

Hydrothermal Activity ◽

Trace Element Geochemistry ◽

Element Geochemistry ◽

Gneissic Granite ◽

Icp Ms ◽

Regional Tectonic

The Kipawa rare-earth element (REE) deposit is located in the Parautochton zone of the Grenville Province 55 km south of the boundary with the Superior Province. The deposit is part of the Kipawa syenite complex of peralkaline syenites, gneisses, and amphibolites that are intercalated with calc-silicate rocks and marbles overlain by a peralkaline gneissic granite. The REE deposit is principally composed of eudialyte, mosandrite and britholite, and less abundant minerals such as xenotime, monazite or euxenite. The Kipawa Complex outcrops as a series of thin, folded sheet imbricates located between regional metasediments, suggesting a regional tectonic control. Several hypotheses for the origin of the complex have been suggested: crustal contamination of mantle-derived magmas, crustal melting, fluid alteration, metamorphism, and hydrothermal activity. Our objective is to characterize the mineralogical, geochemical, and isotopic composition of the Kipawa complex in order to improve our understanding of the formation and the post-formation processes, and the age of the complex. The complex has been deformed and metamorphosed with evidence of melting-recrystallization textures among REE and Zr rich magmatic and post magmatic minerals. Major and trace element geochemistry obtained by ICP-MS suggest that syenites, granites and monzonite of the complex have within-plate A2 type anorogenic signatures, and our analyses indicate a strong crustal signature based on TIMS whole rock Nd isotopes. We have analyzed zircon grains by SEM, EPMA, ICP-MS and MC-ICP-MS coupled with laser ablation (Lu-Hf). Initial isotopic results also support a strong crustal signature. Taken together, these results suggest that alkaline magmas of the Kipawa complex/deposit could have formed by partial melting of the mantle followed by strong crustal contamination or by melting of metasomatized continental crust. These processes and origins strongly differ compare to most alkaline complexes in the world. Additional TIMS and LA-MC-ICP-MS analyses are planned to investigate whether all lithologies share the same strong crustal signature.

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Supplemental Material: Testing models of Laramide orogenic initiation by investigation of Late Cretaceous magmatic-tectonic evolution of the central Mojave sector of the California arc

10.1130/geos.s.15121998.v2 ◽

2021 ◽

Author(s):

R.C. Economos ◽

et al.

Keyword(s):

Inductively Coupled Plasma ◽

National Park ◽

Granitic Rocks ◽

Trace Element Geochemistry ◽

Element Geochemistry ◽

Inductively Coupled ◽

Joshua Tree National Park ◽

Icp Ms ◽

Plasma Mass Spectrometry ◽

Shrimp Zircon

<div>Table S1: SHRIMP zircon U-Pb geochronology data for six samples from the Cadiz Valley batholith. Table S2: SHRIMP zircon U-Pb geochronology data for six samples from the Federal 2-26 Cajon Pass drill core. Table S3: Whole-rock major- and trace-element geochemistry of granitic rocks from Joshua Tree National Park and the Cadiz Valley batholith measured by X-ray fluorescence (XRF) and inductively coupled plasma–mass spectrometry (ICP-MS). Table S4: Rb/Sr and Sm/Nd isotope data from the Joshua Tree National Park and Cadiz Valley batholith. Table S5: Locations, data, and references used to generate histograms in Figure 5.<br></div>

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Karakteristik Unsur Jejak Dalam Diskriminasi Magmatisme Granitoid Pulau Bangka

EKSPLORIUM ◽

10.17146/eksplorium.2015.36.1.2766 ◽

2015 ◽

Vol 36 (1) ◽

pp. 1

Author(s):

Kurnia Setiawan Widana ◽

Bambang Priadi

Keyword(s):

Trace Elements ◽

Neutron Activation Analysis ◽

Activation Analysis ◽

Trace Element Geochemistry ◽

Calc Alkaline ◽

Element Geochemistry ◽

Qualitative And Quantitative ◽

High K ◽

Quantitative Analyses ◽

Geochemical Analyses

Geologi Pulau Bangka disusun oleh variasi granit sebagai Granitoid Klabat yang tersebar di berbagai lokasi. Unsur jejak dapat diaplikasikan dalam diskriminasi magmatisme dalam pembentukan granitoid tersebut. Tujuan penelitian ini adalah mengetahui karakteristik granitoid yang tersebar di Pulau Bangka berdasarkan geokimia unsur jejak untuk diaplikasikan dalam mempelajari magmatisme, sumber dan situasi tektoniknya.Metode analisis geokimia yang diaplikasikan dengan menggunakan Analisis Aktivasi Neutron (AAN) dan portableX-Ray Fluorescence (pXRF) untuk analisis kualitatif dan kuantitatif pada 27 sampel dari Granitoid Klabat di Pulau Bangka.Hasil penelitian ini menyimpulkan Granitoid Bangka Utara (Belinyu) dan Bangka Tengah sebagai percampuran kerak-mantel dengan afinitas Calc-Alkaline, karakteristik Tipe I sedangkan Granitoid Bangka Selatan dan Barat asal kerak dengan afinitas High-KCalc-Alkaline sebagai Tipe S. Diharapkan diskrimasi magmatisme granitoid bermanfaat dalam memberikan panduan eksplorasi bahan galian nuklir di Pulau Bangka. Geology of Bangka Island consists by variation of granite as Klabat Granitoid scattered in various locations. Trace elements can be applied in magmatism discrimination of granitoid.The purpose of this study was to determine the characteristics Bangka Island granitoid based on trace element geochemistry to be applied in the study of magmatism, source and tectonic situation. Geochemical analyses method used are the Neutron Activation Analysis (NAA) and portableX-Ray Fluorescence (pXRF) for qualitative and quantitative analyses on 27 samples of Klabat granitoid on Bangka Island. This study concluded granitoid East Bangka (Belinyu) and Central Bangka as crust-mantle mixing with affinityCalc-Alkaline, characteristic of I Type while South and West Bangka granitoid crust origin with affinity high K Calc-Alkaline as S Type. Expectedmagmatismdiscrimination ofgranitoidhelpfulin providingradioactive mineral explorationguidein BangkaIsland.

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Mineralogy, Geochemistry and Genesis of the Luc Yen Noble Spinel Deposit, Vietnam

10.35597/2313-545x-2019-5-3-56-69 ◽

2019 ◽

Vol 5 ◽

pp. 56-69

Author(s):

K.A. Kuksa ◽

P.B. Sokolov ◽

O.Yu. Marakhovskaya ◽

G.A. Gussias ◽

W. Brownscombe

Keyword(s):

Trace Element ◽

Trace Element Geochemistry ◽

Element Geochemistry ◽

Trace Element Pattern ◽

Mineral Inclusions ◽

Icp Ms ◽

Element Pattern ◽

Mineral Assemblages ◽

North Vietnam ◽

Petrographic Study

The paper presents the detailed mineralogical and petrographic study of spinel-bearing marbles at the Luc Yen deposit, North Vietnam. The LA-ICP-MS analysis of 74 spinel grains, combined with mineralogical data, allows us to discriminate them into fve types according to mineral assemblages and trace element geochemistry. Forty seven minerals are identifed as inclusions in spinel grains and 38 minerals are described at Luc Yen deposit for the frst time including leonardsenite, tintisite, manasseite, chalcoalumite, cobaltite and spherocobaltite. The mineral assemblages, trace element pattern, and specifc mineral inclusions indicate the involvement of hydrothermal fuids related to magma intrusions in the formation of, at least, two of fve spinel types at the deposit.

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