气候变化领域集成服务门户(CCPortal): Footprints of element mobility during metasomatism linked to a late Miocene peraluminous granite intruding a carbonate host (Campiglia Marittima; Tuscany)

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DOI	10.1007/s00531-019-01723-9
	Footprints of element mobility during metasomatism linked to a late Miocene peraluminous granite intruding a carbonate host (Campiglia Marittima; Tuscany)
	Paoli G.; Dini A.; Rocchi S.
发表日期	2019
ISSN	14373254
起始页码	1617
结束页码	1641
卷号	108 期号:5
英文摘要	The Campiglia Marittima magmatic-hydrothermal system includes a peraluminous granite, its carbonatic host, and skarn. The system evolved generating a time-transgressive exchange of major and trace elements between granite, metasomatic fluids, and host rock. The process resulted in partial metasomatic replacement of the granite and severe replacement of the carbonate host rocks. The fluid activity started during a late-magmatic stage, followed by a potassic–calcic metasomatism, ending with a lower temperature acidic metasomatism. During the late-magmatic stage, B-rich residual fluids led to the formation of disseminated tourmaline–quartz orbicules. High-temperature metasomatic fluids generated a pervasive potassic–calcic metasomatism of the granite, with replacement of plagioclase, biotite, ilmenite, and apatite by K-feldspar, phlogopite–chlorite–titanite, titanite–rutile, and significant mobilization of Fe, Na, P, Ti, and minor HFSE/REE. The metasomatized granite is enriched in Mg, K, Rb, Ba, and Sr, and depleted in Fe and Na. Ca metasomatism is characterized by crystallization of a variety of calc-silicates, focusing along joints into the granite (endoskarn) and at the marble/pluton contact (exoskarn), and exchange of HFSE and LREE with hydrothermal fluids. Upon cooling, fluids became more acidic and fluorine activity increased, with widespread crystallization of fluorite from disequilibrium of former calc-silicates. At the pluton-host boundary, fluids were accumulated, and pH buffered to low values as temperature decreased, leading to the formation of a metasomatic front triggering the increasing mobilization of REE and HFSE and the late crystallization of REE–HFSE minerals. © 2019, Geologische Vereinigung e.V. (GV).
英文关键词	Acidic metasomatism; Element mobility; Fluid–rock interaction; Magmatic-hydrothermal system
语种	英语
scopus关键词	carbonate rock; element mobility; granite; host rock; hydrothermal fluid; hydrothermal system; metasomatism; Miocene; skarn; Campiglia Marittima; Italy; Livorno [Tuscany]; Tuscany
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147820
作者单位	Dipartimento di Scienze della Terra, Università di Pisa, Via Santa Maria 53, Pisa, 56126, Italy; CNR, Istituto di Geoscienze e Georisorse, Via Moruzzi 1, Pisa, 56124, Italy
推荐引用方式 GB/T 7714	Paoli G.,Dini A.,Rocchi S.. Footprints of element mobility during metasomatism linked to a late Miocene peraluminous granite intruding a carbonate host (Campiglia Marittima; Tuscany)[J],2019,108(5).
APA	Paoli G.,Dini A.,&Rocchi S..(2019).Footprints of element mobility during metasomatism linked to a late Miocene peraluminous granite intruding a carbonate host (Campiglia Marittima; Tuscany).International Journal of Earth Sciences,108(5).
MLA	Paoli G.,et al."Footprints of element mobility during metasomatism linked to a late Miocene peraluminous granite intruding a carbonate host (Campiglia Marittima; Tuscany)".International Journal of Earth Sciences 108.5(2019).