Insight into diagenetic processes from authigenic tourmaline: An example from Carboniferous and Permian siliciclastic rocks of western Poland

Biernacka, Julita

doi:10.1016/j.sedgeo.2019.05.009

Cited by 6 publications

(3 citation statements)

References 69 publications

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“…Minerals of the tourmaline supergroup are (Si6O18)-ring borosilicates with much diversified compositions. They occur as minor to accessory minerals in low-grade to ultrahigh-pressure metamorphic rocks, granites and granitic pegmatites, chemically resistant phases in sedimentary rocks, as well as common gangue minerals in diverse types of hydrothermal deposits (e.g., Ertl et al 2010;Slack and Trumbull 2011;van Hinsberg et al 2011;Henry and Dutrow 2012;Biernacka 2019). According to Henry et al (2011), the general chemical formula of the tourmaline supergroup minerals can be written as XY3Z6(T6O18)(BO3)3V3W, where the populations of cations and anions at specific structural sites are indicated in capital letters: IX X = Na + , K + , Ca 2+ , Pb 2+ ,  ( = vacancy); VI Y = Fe 2+ , Mg 2+ , Mn 2+ , Al 3+ , Li + , Fe 3+ , Cr 3+ , V 3+ , Ti 4+ , Zn 2+ , Cu 2+ , Ni 2+ ; VI Z = Al 3+ , Fe 3+ , Cr 3+ , V 3+ , Mg 2+ , Fe 2+ ,Ti 4+ ; IV T = Si 4+ , Al 3+ , B 3+ ; III B = B 3+ ; III,IV V = OH -, O 2-; and III,IV W = OH -, F -, O 2-.…”

Section: Introductionmentioning

confidence: 99%

Magnesio-lucchesiite from the Kowary vicinity, Karkonosze Mountains, SW Poland: the third occurrence worldwide

Sęk

Włodek

Stachowicz

et al. 2022

MinMag

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Two tourmaline samples occurring in quartz veinlets, which crosscut an amphibolite body at the Budniki camp near the Kowary town, in the south-west part of the Karkonosze Mountains (SW Poland), were studied through microprobe and single crystal X-ray diffraction. Samples were extracted from core and rim regions of crystals with a concentric zoning, respectively.Chemical and structural data revealed that the core tourmaline is characterized by a draviteoxy-dravite composition, with formula: X (Na0.82Ca0.07K0.01Sr0.010.09)Σ1 Y (Mg1.73Fe 2+ 0.81Fe 3+ 0.41Ti0.04V0.01)Σ3 . Z (Al5.85Fe 3+ 0.15)Σ6 ( T Si6O18) (BO3)3 (OH)3 W (OH0.50O0.50)Σ1 and unit cell parameters a = 15.97377(14) Å and c = 7.22644(7) Å. The rim part of the crystals has a magnesio-lucchesiite composition, described by the formula: X (Ca0.49Na0.41K0.04Sr0.020.04)Σ1 Y (Mg1.87Fe 2+ 0.95Ti0.15Fe 3+ 0.02V0.02)Σ3 Z (Al5.49Fe 3+ 0.51)Σ6 (BO3)3

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Section: Introductionmentioning

confidence: 99%

Magnesio-lucchesiite from the Kowary vicinity, Karkonosze Mountains, SW Poland: the third occurrence worldwide

Sęk

Włodek

Stachowicz

et al. 2022

MinMag

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“…Authigenic tourmaline shows significant X-site vacancies (as a result of low Na content in fluids) and a low Ca content [82][83][84][85][86]. The magnesium content can be very variable, as significant content can be the result of the circulation of marine brines [87,88], while a distinct decrease in Mg and an increase in Fe in the growth direction could be considered an effect of the fluid dilution with respect to Na and Ca over time [88], a decrease in the fluid temperature or, in a metamorphic environment, a decreasing temperature of crystal growth [89]. Considering this, it is hard to define whether the rims originate during their magmatic/metamorphic origin or in a diagenetic environment.…”

Section: Discussionmentioning

confidence: 99%

Detrital Tourmalines in the Cretaceous–Eocene Julian and Brkini Flysch Basins (SE Alps, Italy and Slovenia)

Lenaz,

Garlatti,

Bernardi

et al. 2024

Minerals

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In the SE Alps, two Cretaceous–Eocene flysch basins, Julian and Brkini, filled with turbidite sediments, are present. This study novelly reports heavy mineral assemblage counts and detrital tourmaline characterization for 11 samples. It is possible to define three different groups, characterized by the presence of (1) a clinopyroxene–epidote–low-ZTR (zircon+tourmaline+rutile; 5%) sample association, (2) a high-ZTR (>48%)–garnet–apatite association and (3) a low-ZTR (<40%)–Cr-spinel–garnet association. Detrital tourmalines from both the Julian and Brkini flysch basins are rather similar in composition, associated with metapelites and metapsammites coexisting or not coexisting with an Al-saturating phase, ferric-iron-rich quartz–tourmaline rocks and calc–silicate rocks; however, their number is drastically different. In fact, even if the percentage of heavy minerals is very low and similar in both basins (0.17–1.34% in weight), in the Julian basin, the number of tourmaline crystals is much lower than that in Brkini (1–14 vs. 30–100), suggesting an important change in the provenance area. Interestingly, the presence of a high amount of tourmaline derived from ferric-iron-rich quartz–tourmaline rocks and calc–silicate rocks makes these two basins different from all the Cretaceous flysch basins of Bosnia and the Northern Dinaric zone, where these supplies are missing or very limited.

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“…The tourmaline often occur in metamorphic rocks such as meta-evaporites [49,50], hornfels [51], aluminous schists [52][53][54][55], gneisses [56][57][58], skarns [59] and marbles [60]. Tourmaline can also be found in sedimentary rocks, where it crystallizes in pore spaces during diagenesis [61][62][63]. The ubiquity of occurrence in various rock forming environments is also reflected in the diverse chemical composition of tourmaline-supergroup minerals [36].…”

Section: Introductionmentioning

confidence: 99%

Tourmalines as a Tool in Provenance Studies of Terrigenous Material in Extra-Carpathian Albian (Uppermost Lower Cretaceous) Sands of Miechów Synclinorium, Southern Poland

2020

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The mature transgressive Albian quartz sands in the Miechów Synclinorium contain a poor (<1%) heavy mineral suite consisting of tourmaline, rutile, garnet, staurolite, ilmenite, zircon, monazite, kyanite, and gahnite. The other minerals, especially those containing Fe and Ti (e.g., biotite), are subordinate. Over 512 tourmaline grains from seven outcrops in the Miechów Segment were analysed using electron probe microanalysis (EPMA). The majority of grains belong to the alkali tourmaline group in which the X-site is dominated by Na (0.4 to 0.9 apfu). Detrital tourmalines are mainly dravite with a prevalent schorl end-member with average XMg values over 0.6. Apart from Mg and Fe, the other Y-site cations rarely exceed 0.1 apfu. Fluorine content is usually below the detection limit. Their chemical composition suggests that most tourmaline grains were sourced from Al-rich and Al-poor metapelites/metapsammites. The main source rocks for the Albian sands were rocks from low- to medium-grade metamorphism, probably from Al-rich quartz-muscovite schist and/or muscovite rich gneisses. Additional minor source rocks were granites and pegmatites coexisting with them. A comparison of the examined tourmaline to tourmaline from possible source areas indicates that these areas were located in the eastern part of the Bohemian Massif and/or eastern Sudetes.

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Insight into diagenetic processes from authigenic tourmaline: An example from Carboniferous and Permian siliciclastic rocks of western Poland

Cited by 6 publications

References 69 publications

Magnesio-lucchesiite from the Kowary vicinity, Karkonosze Mountains, SW Poland: the third occurrence worldwide

Magnesio-lucchesiite from the Kowary vicinity, Karkonosze Mountains, SW Poland: the third occurrence worldwide

Detrital Tourmalines in the Cretaceous–Eocene Julian and Brkini Flysch Basins (SE Alps, Italy and Slovenia)

Tourmalines as a Tool in Provenance Studies of Terrigenous Material in Extra-Carpathian Albian (Uppermost Lower Cretaceous) Sands of Miechów Synclinorium, Southern Poland

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