Age of hydrothermal processes in the central iberian zone (Spain) according TO U-Pb dating of cassiterite and apatite
About authors
- 1 — Institute of Precambrian Geology and Geochronology of Russian Academy of Sciences
- 2 — Institute of Precambrian Geology and Geochronology of Russian Academy of Sciences
- 3 — Mineral Exploration Network Ltd.
Abstract
Results of isotope-geochemical studies by PbLS step-leaching method of cassiterite from greisens located in Logrosán granite massif (Central Iberian Zone, Spain) and apatite from hydrothermal quartz-apatite vein on its exocontact indicate that in both cases a hydrothermal event is recorded in the interval of 114-126 Ma, which has been accompanied by lead supply. Within the limits of estimation error, the same age around 120 Ma corresponds to crystallization of hydrothermal apatite, formation of sticks and micro-inclusions in cassiterite from greisens and is suggested for Au-As-Sb-Pb ore mineralization, which calls for further confirmation. Xenogenous zircon from quartz-apatite vein does not react to this relatively low-temperature hydrothermal event either with building up new generations (sticks, areas of recrystallization) or with rebalancing of U-Pb isotope system. The age of greisen formation has been confirmed to be around 305 Ma by PbLS method on final phases of cassiterite leaching. Earlier it was estimated with 40 Ar/ 39 Ar method on muscovite.
10.18454/pmi.2017.3.275
References
- Возможности и ограничения Pb-Pb датирования метаморфогенных минералов с применением метода ступенчатого растворения / О.А.Левченков, Н.Г.Ризванова, А.Ф.Макеев и др. // Геохимия. 2009. № 11. С. 1123-1137.
- Изохронное Rb-Sr датирование процессов позднепалеозойского эпитермального рудогенеза на примере месторождения золота Кайрагач (Кураминский рудный район, Срединный Тянь-Шань) / И.В.Чернышев, В.А.Коваленкер, Ю.В.Гольцман и др. // Геохимия. 2011. № 2. С. 115-128.
- Федотова А.А. Геохимия циркона (данные ионного микрозонда) как индикатор генезиса минерала при геохронологических исследованиях / А.А.Федотова, Е.В.Бибикова, С.Г.Симакин // Геохимия. 2008. № 9. С. 980-997.
- Черемазова Е.В. Минералого-геохимические особенности Au-Sb оруденения на участке Агихонкийо (Эстремадура, Испания) / Е.В.Черемазова, К.А.Новоселов, Ю.Л.Светлова // Региональная геология и металлогения. 2016. № 68. С. 100-107.
- A precise U-Pb age on cassiterite from the Xianghualing tin-polymetallic deposit (Hunan, South China) / S.Yuan, J.Peng, R.Hu et al. // Mineralium Deposita. 2008. Vol. 43. P. 375-382.
- Cassiterite LA-MC-ICP-MS U/Pb and muscovite 40Ar/39Ar dating of tin deposits in the Tengchong-Lianghe tin district, NW Yunnan, China / X.-C.Chen, R.-Z.Hu, X.-W.Bi et al. // Mineralium Deposita. 2014. Vol. 49. P. 843-860.
- Frei R. Single mineral Pb-Pb dating / R.Frei, B.S.Kamber // Earth and Planetary Science Letters. 1995. Vol. 129. P. 261-268.
- Geology and gravity modeling of the Logrosán Sn–(W) ore deposits (Central Iberian Zone, Spain) / E.Chicharro, T.Martin-Crespo, D.Gomez-Ortiz et al. // Ore Geology Reviews. 2015. Vol. 65. P. 294-307.
- Gulson B.L. Cassiterite: Potential for direct dating of mineral deposits and a precise age for the Bushveld complex granites / B.L.Gulson, M.T.Jones // Geology. 1992. Vol. 20. P. 355-358.
- Hidrothermal phosphate vein-type ores from the southern Central Iberian Zone, Spain: Evidence for their relationship to granites and Neoproterozoic metasedimentary rocks. E.Vindel, E.Chicharro, C.Villaseca et al. // Ore Geology Reviews. 2014. Vol. 62. P. 143-155.
- Hinton R.W. The chemistry of zircon: variations within and between large crystals from syenite and alkali basalt xenoliths / R.W.Hinton, B.G.J.Upton // Geochimica et Cosmochimica Acta. 1991. Vol. 55. P. 3287-3302.
- Ludwig K.R. PbDat 1.21 for MS-dos: A computer program for IBM-PC Compatibles for processing raw PbU-Th isotope data. Version 1.07. U.S. Geological Survey, Open-File Report 88-542, 1991. 35 p.
- Ludwig K.R. Isoplot/Ex 3. A geochronological toolkit for Microsoft Excel. Berkeley Geochronology Center. Special publication N 4. 2003. 74 p.
- Manhes G. Comparative uranium-thorium-lead and rubidium-strontium study of the Severin amphoterite: consequences for early Solar system chronology / G.Manhes, J.E.Minster, C.J.Allegre // Earth and Planetary Science Letters. 1978. Vol. 39. P. 14-24.
- McDonough W.F. The composition of the Earth / W.F.McDonough, S.S.Sun // Chemical Geology. 1995. Vol. 120. P. 223-253.
- Origin, ore forming fluid evolution and timing of the Logrosan Sn-(W) ore deposits (Central Iberian Zone, Spain) / E.Chicharro, M.-C.Boiron, J.A.Lopez-García et al. // Ore Geology Reviews. 2016. Vol. 72. P. 896-913.
- Primary Au prospecting results in the Logrosán area (Central Iberian Zone, Spain) / E.Cheremazova, S.Skublov, K.Novoselov et al. // Journal of Iberian Geology. 2015. Vol. 41. P. 223-232.
- Single mineral dating by the Pb-Pb step-leaching method: Assessing the mechanisms / R.Frei, J.D.Kramers, W.J.Przybylowicz et al. // Geochimica et Cosmochimica Acta. 1997. Vol. 61. P. 393-414.
- Watson E.B. Crystallization thermometers for zircon and rutile / E.B.Watson, D.A.Wark, J.B.Thomas // Contributions to Mineralogy and Petrology. 2006. Vol. 151. P. 413-433.
- Williams I.S. U-Th-Pb geochronology by ion microprobe // Reviews in Economic Geology. 1998. Vol. 7. P. 1-35.
- Zircon U-Pb and Hf isotopic constraints on the genesis of a post-kinematic S-type Variscan tin granite: the Logrosan cupola (Central Iberian Zone) / E.Chicharro, C.Villaseca, P.Valverde-Vaquero et al. // Journal of Iberian Geology. 2014. Vol. 40. P. 451-470.
Similar articles
Status and directions of improvement of development systems of coal seams on perspective Kuzbass coal mines
2017 V. P. Zubov
Energy efficiency of hydraulic transportation of iron ore processing tailings at Kachkanarsky MPP
2017 V. I. Aleksandrov, S. A. Timukhin, P. N. Makharatkin
«Rhetoric practice» by I.S.Rizhsky (1796) at the mining university: history and contem-poraneity
2017 D. A. Shchukina, N. A. Egorenkova