Late magmatic – hydrothermal tourmaline occurrences within leucogranites in NW Anatolia (Turkey): Mineral chemistry and genetic implications

Aysal, Namık; Öngen, Sinan; Hanilçi, Nurullah; Kasapçı, Cem; Laçin, Davut; Boroğlu, Mehtap Şafak; Yeşiltaş, Mehmet; Yılmaz, İsak; Azaz, Direnç

doi:10.1016/j.chemer.2020.125676

Cited by 7 publications

(4 citation statements)

References 41 publications

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“…At present, the continuing extension of the ore bodies on the south and north sides has not been controlled. The ore body is simple in shape, generally in the shape of lamellar and lenticular bodies, and is a simple branching compound (Figure 3a-c) [29][30][31].…”

Section: Geological Characteristics Of the X03 Veinmentioning

confidence: 99%

“…According to the classification diagram of tourmaline (Figure 6c-e), Tur-III and Tur-IV are schorl tourmaline, Tur-Iare dravite tourmaline, and Tur-II are foitite tourmaline. In summary, the tourmaline in the Jiajika X03 vein are classified as schorl-Oxy/Fluor-schorl, dravite-Hydroxy-dravite and foitite-Oxy foitite solid solutions [30]. In the Al-Fe-Mg and Ca-Fe-Mg ternary diagrams of Henry and Guidotti [38], the Tur-III and Tur-IV type tourmaline plots in the field 2 and the Tur-I and Tur-II type tourmaline falls in the field 5 and 10 (Figure 7a,b).…”

Section: Tourmaline Hornfelsmentioning

confidence: 99%

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Geochemical Characteristics and Metallogenic Significance of the X03 Vein Tourmaline in the Jiajika Rare Metal Deposit, West Sichuan

et al. 2023

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The Jiajika rare metal deposit contains the largest area of granitic pegmatite-type rare metal deposits in China. The X03 vein is an immense rare metal deposit dominated by lithium, which was found in the deposit in recent years. The contact metamorphic belt of tourmalinization and petrochemistry is widely developed in its wall rocks, and the altered rocks formed contain Li and other rare metal mineralization. In this paper, the tourmaline found in the different rocks of the Jiajika X03 vein is divided into four types: two-mica quartz schist (Tur-Ⅰ), tourmaline hornfels (Tur-Ⅱ), tourmaline-bearing granite pegmatite (Tur-Ⅲ) and spodumene-bearing granite pegmatite (Tur-Ⅳ); their in situ major element, trace element and boron isotope data are systematically studied. The results show that all tourmalines in the Jiajika X03 vein deposit belong to the alkali group, and are schorl–Oxy/Fluor–schorl, dravite–Hydroxy-dravite and foitite–Oxy foitite solid solutions, among which Tur-Ⅰ are dravite, Tur-Ⅱ are foitite of hydrothermal origin and Tur-Ⅲ and Tur-Ⅳ are schorl of magmatic origin. The boron isotope values show that the boron involved the formation process of tourmaline mainly originates from the Majingzi S-type granite, and the boron isotope variations in tourmaline are controlled by melt fluid and Rayleigh fractionation. Moreover, there is a clear correlation between the B isotope value of tourmaline and the Li, Mn, Zn, Mg, and V contents, showing that these contents in tourmaline are good indicators of the mineralization type of pegmatite.

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Section: Geological Characteristics Of the X03 Veinmentioning

confidence: 99%

Section: Tourmaline Hornfelsmentioning

confidence: 99%

Geochemical Characteristics and Metallogenic Significance of the X03 Vein Tourmaline in the Jiajika Rare Metal Deposit, West Sichuan

et al. 2023

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“…The leucocratic facies and aplitic-pegmatitic vein rocks were pinkish grey to white and display fine-to medium-grained equigranular and granophyric textures (Figure 4f). These rocks consisted of quartz, K-feldspar, plagioclase, rare biotite, and cordierite, and they randomly contained large tourmaline crystals that had developed in late-stage miarolitic cavities (Aysal et al, 2020). The cordierites mainly displayed subhedral to anhedral shapes.…”

Section: Petrographical Featuresmentioning

confidence: 99%

Peritectic assemblage entrainment and mafic–felsic magma interaction in the Late Oligocene–Early Miocene Karadağ Pluton in the Biga Peninsula, northwest Turkey: petrogenesis and geodynamic implications

Aysal¹,

Öngen²,

Şahin³

et al. 2021

Turkish J Earth Sci

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“…They normally contain disseminated, vein-, stockwork-, and breccia-hosted mineralization [3,4]. Tourmaline is a complex borosilicate mineral that is widely distributed in porphyry deposits and is supposed to be a key prospecting guide, especially in porphyry W and Sn deposits [5][6][7][8][9]. However, it is normally present as an alteration or gangue mineral in porphyry Cu, Mo, and Au deposits, e.g., Peschanka and Ol'khovka porphyry Cu deposits in Chukchi Peninsula [10]; the Aktogai porphyry Cu deposit in Kazakhstan [7]; the Agua Rica porphyry Cu-Mo-Au deposit in Argentina [11]; the Salikvan porphyry Cu-Mo deposit in northeastern Turkey [12]; the Kışlada g porphyry Au deposit in western Turkey [13]; the Coxheath porphyry Cu-Mo-Au deposit in Nova Scotia [6]; and the Shiwu porphyry Cu-Au deposit in West Junggar [14].…”

Section: Introductionmentioning

confidence: 99%

Constraints on the Formation of the Shiwu Porphyry Cu–Au Deposit in West Junggar, NW China: Insights from Tourmaline-Rich Igneous Rocks

Wang

Hong

et al. 2023

Minerals

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Tourmaline tends to occur in porphyry Cu–Au deposits as an alteration or gangue mineral. However, abundant primary tourmalines in miarolitic cavities or interstitially distributed with other silicate minerals have been found in the Shiwu porphyry Cu–Au deposit in West Junggar, NW China. These tourmalines are normally accompanied by pyrite and have a high affinity for Cu and Au mineralization. A combined study of the petrology, geochronology, isotope, and mineral geochemistry data of the tourmaline-rich igneous rocks and the wallrock of tourmaline-poor pyroxene diorite has been completed. The laser ablation inductively coupled plasma mass spectrometry (LA–ICP–MS) U–Pb dating of zircons from tourmaline-poor pyroxene diorite, tourmaline-rich diorite, and tourmaline-rich andesite shows the ages of the zircons to be 317.0 ± 1.0 Ma (MSWD = 0.37, n = 18), 315.8 ± 1.0 Ma (MSWD = 0.84, n = 22), and 306.4 ± 1.6 Ma (MSWD = 1.15, n = 15), respectively. The relatively low values of Hf isotopes (εHf(t) = +6.0 to +13.6) suggest that the tourmaline-poor pyroxene diorite is sourced from a mixed melt of juvenile mantle materials with old crustal components. The tourmaline-rich diorite and the tourmaline-rich andesite that contain higher εHf(t) values (ranging from +13.3 to +17.9) are mainly derived from juvenile mantle materials. In addition, the εHf(t) values in the tourmaline-poor pyroxene diorite and the tourmaline-rich diorite (+13.3 to +16.1) and andesite (+16.3 to +17.9) are gradually rising with their age evolution, which indicates that more and more mantle-derived components are joining in their formation process. This process has also been recorded in primary tourmaline growth, e.g., the EPMA profile reveals an increase in the contents of Fe and other metals and a decrease in Al contents from the inside (core) to the outside (growth zoning). Therefore, the injection of mantle-derived magma that could supply the large amount of copper and gold was critical for the formation of the Shiwu porphyry Cu–Au deposit.

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Late magmatic – hydrothermal tourmaline occurrences within leucogranites in NW Anatolia (Turkey): Mineral chemistry and genetic implications

Cited by 7 publications

References 41 publications

Geochemical Characteristics and Metallogenic Significance of the X03 Vein Tourmaline in the Jiajika Rare Metal Deposit, West Sichuan

Geochemical Characteristics and Metallogenic Significance of the X03 Vein Tourmaline in the Jiajika Rare Metal Deposit, West Sichuan

Peritectic assemblage entrainment and mafic–felsic magma interaction in the Late Oligocene–Early Miocene Karadağ Pluton in the Biga Peninsula, northwest Turkey: petrogenesis and geodynamic implications

Constraints on the Formation of the Shiwu Porphyry Cu–Au Deposit in West Junggar, NW China: Insights from Tourmaline-Rich Igneous Rocks

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