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greisen

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Journal Article
Journal: Economic Geology
Published: 01 March 2024
Economic Geology (2024) 119 (2): 471–500.
... district in the Cordillera Real of Bolivia. Tourmaline is associated with greisens, breccias, and veins, which occur around the Triassic Chacaltaya peraluminous granitic stock hosted by Silurian metasedimentary rocks. Three main petrographic types of hydrothermal tourmaline have been identified: pre-ore...
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Journal Article
Published: 01 November 2022
Russ. Geol. Geophys. (2022) 63 (11): 1300–1312.
.... , Stein , H.J. , Zimmerman , A. , Sotnikov , V.I. , 2003 . Re–Os ages of molybdenite from porphyry and greisen Mo–W deposits of southern Siberia (Russia) preserve metallogenic record , in: Mineral Exploration and Sustainable Development . Millpress , Rotterdam , Vol. 1 , pp. 231 – 234...
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Journal Article
Journal: Economic Geology
Published: 01 September 2022
Economic Geology (2022) 117 (6): 1415–1428.
.... In S- and A-type granite-greisen systems, magmatic quartz has high Li/Al ratios from 0.007 to 0.502 ( N = 604) with a mean of 0.130 ± 0.063 and from 0.009 to 0.327 ( N = 325) with a mean of 0.126 ± 0.065, respectively. Hydrothermal quartz has progressively lower Li and Al concentrations...
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Journal Article
Published: 19 August 2022
The Canadian Mineralogist (2022) 60 (4): 561–595.
...Darrell J. Henry; Eduardo O. Zappettini; Barbara L. Dutrow ABSTRACT Textural and chemical characteristics of quartz and tourmaline found in tourmaline-rich orbicules, greisens, pegmatites, and tourmalinite segregations associated with the peraluminous leucogranitic Tusaquillas Batholith Complex...
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Journal Article
Journal: Economic Geology
Published: 01 June 2022
Economic Geology (2022) 117 (4): 833–852.
.... The Xitian W-Sn polymetallic deposit in central South China contains several minerals suitable for isotopic dating for interchronometer comparison. 40 Ar/ 39 Ar laser step heating of 16 micas from ore veins, greisen, and metallogenic granites yields flat age spectra and thus well-defined ore formation ages...
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Journal Article
Published: 01 June 2022
American Mineralogist (2022) 107 (6): 1034–1044.
... to the Weilasituo ore bodies, the Jiabusi granite and greisen and the Shihuiyao metamorphic sediment formation have good potential for Li exploration. Our study also provides preliminary constraints on the genesis of Li deposits. (2) y = β 0 + β 1 x 1 + β 2 x 2...
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Journal Article
Published: 01 March 2022
American Mineralogist (2022) 107 (3): 495–508.
...) tour-maline in coarse-grained monzogranite (Tur-G1); (2) tourmaline in medium–fine-grained monzogranite (Tur-G2); (3) tourmaline aggregates associated with muscovite in greisen (Tur-Gr), showing a yellow core (Tur-Gry) and blue rim (Tur-Grb); and (4) quartz-vein-hosted tourmaline (Tur-V). In this study...
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Journal Article
Published: 01 October 2021
Russ. Geol. Geophys. (2021) 62 (10): 1139–1156.
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Journal Article
Published: 01 September 2021
Russ. Geol. Geophys. (2021) 62 (9): 1061–1073.
... of rare-metal Li–F granites. The geochemical evolution of the Baga Gazriin Chuluu multiphase pluton at the postmagmatic stage was marked by the most intense enrichment of greisens and microclinites with lithophile and ore elements (Sn, W, and Zn) and the formation of ore mineralization. In the permeable...
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Journal Article
Published: 23 February 2021
Bulletin de la Société Géologique de France (2021) 192 (1): 2.
...Gaëtan Launay; Stanislas Sizaret; Philippe Lach; Jérémie Melleton; Éric Gloaguen; Marc Poujol The W-Sn Panasqueira ore deposit is a magmatic-hydrothermal system, which includes a high grade quartz-vein type mineralization and underneath disseminated greisen-type mineralization located in the upper...
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Journal Article
Published: 03 February 2021
Mineralogical Magazine (2021) 85 (2): 172–188.
...Ping Wang; Thomas P. Gray; Zhe Li; Evan J.D. Anderson; Julien Allaz; Joseph R. Smyth; Alan E. Koenig; Lijian Qi; Yan Zhou; Markus B. Raschke Abstract Beryl from Xuebaoding, Sichuan Province, western China is known for its unusual tabular habit and W–Sn–Be paragenesis in a greisen-type deposit...
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Journal Article
Journal: Economic Geology
Published: 18 December 2020
Economic Geology (2021) 116 (1): 147–167.
... earth element and Sn concentrations of tourmaline in the greisen deposits together with δ 18 O of coprecipitated quartz indicate that exsolution of a late-stage, Cl-rich fluid from the Ardlethan granite led to cassiterite mineralization in these deposits. In contrast the Fe/(Fe + Mg) and initial ε Nd...
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Journal Article
Journal: Economic Geology
Published: 01 May 2020
Economic Geology (2020) 115 (3): 603–625.
...Wei Mao; Hong Zhong; Jiehua Yang; Yanwen Tang; Liang Liu; Yazhou Fu; Xingchun Zhang; Kyaing Sein; Soe Myint Aung; Jie Li; Le Zhang Abstract The Kuntabin Sn-W deposit, located in southern Myanmar, is characterized by abundant greisen-type and quartz vein-type cassiterite and wolframite...
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Journal Article
Published: 22 April 2020
Canadian Journal of Earth Sciences (2020) 57 (7): 814–839.
... with a complex mineralized hydrothermal system containing endogranitic Sn–W–Mo–Zn–Bi–U-bearing greisen/sheeted veins within the pluton. Magmatic monazite and zircon U–Pb ages obtained by LA–ICP–MS overlap at 368 Ma, recording a Late Devonian crystallization age for the MDG. Although discrimination, outside...
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Journal Article
Published: 01 February 2020
Russ. Geol. Geophys. (2020) 61 (2): 155–173.
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Journal Article
Published: 01 November 2019
The Journal of Geology (2019) 127 (6): 665–689.
... that had undergone extensive fractional crystallization combined with late-magmatic fluid overprint. Accumulation of residual volatile-rich melt and exsolved fluids in the apical part of the magmatic cupola produced stockscheider pegmatite, greisen, and quartz veins that cut the peripheries of the NAG...
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Journal Article
Published: 01 August 2019
Russ. Geol. Geophys. (2019) 60 (8): 890–910.
... and geophysical data). This batholith is cut by the East Kalguty belt of rare-metal ongonite–elvan dikes spatially and temporally associated with the East Kalguty quartz-vein–greisen Mo–W deposit. Geological and petrogenetic studies along with published and our new results of geochronological (U/Pb zircon, Re/Os...
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Journal Article
Journal: Economic Geology
Published: 01 February 2019
Economic Geology (2019) 114 (1): 153–163.
... with the Panasqueira granite (289 ± 4 Ma; Priem and den Tex, 1984 ), which is strongly greisenized in its upper parts ( Fig. 1A ). The paragenetic sequence consists of a (1) preore crack seal stage, (2) pre- to synore white mica selvage formation, (3) oxide-silicate ore stage, (4) main sulfide ore stage, (5...
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Journal Article
Journal: Economic Geology
Published: 01 August 2018
Economic Geology (2018) 113 (5): 1193–1208.
... mass spectrometry (SIMS) zircon U-Pb, muscovite Ar-Ar, and molybdenite Re-Os age determinations that constrain the timing relationships among granitic magmatism, greisenization, and W mineralization related to the Zhangjialong deposit. The molybdenite Re-Os age of the W mineralization is 160.2 ± 2.2 Ma...
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Journal Article
Published: 01 January 2018
American Mineralogist (2018) 103 (1): 39–54.
... “sulfide” stage, involving for the first time a polyphase emplacement of the mineralization. Li-micas from the underlying granite, greisen, and the different stages represented in the veins, were studied. The chemistry of the micas (characterized by intermediate compositions between phlogopite-zinnwaldite...
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