globalchange  > 影响、适应和脆弱性
DOI: 10.1007/s00531-012-0832-x
Scopus记录号: 2-s2.0-84875400355
论文题名:
Geochemistry of phlogopite, diopside, calcite, anhydrite and apatite pegmatites and syenites of southern Madagascar: Evidence for crustal silicocarbonatitic (CSC) melt formation in a Panafrican collisional tectonic setting
作者: Morteani G.; Kostitsyn Y.A.; Gilg H.A.; Preinfalk C.; Razakamanana T.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2013
卷: 102, 期:3
起始页码: 627
结束页码: 645
语种: 英语
英文关键词: Anhydrite ; Apatite ; Calcite ; Carbonatite ; Diopside ; Evaporite ; Isotopes ; Pegmatite ; Phlogopite ; REE
Scopus关键词: anhydrite ; apatite ; calcite ; carbonatite ; continental collision ; crustal structure ; diopside ; evaporite ; geochemistry ; isotopic composition ; melt ; pegmatite ; phlogopite ; rare earth element ; syenite ; tectonic setting ; Madagascar
英文摘要: The phlogopite, diopside, calcite, anhydrite and apatite pegmatites of Ampandrandava and Beraketa are examples for the many other pegmatites of similar silicocarbonatitic composition found in the Bekily and Betroka-Beraketa Precambrian belts of southern Madagascar. The two studied pegmatites and associated syenites crystallised from immiscible silicocarbonatitic and peralkaline syenitic melts in a time span between 515 and 504 Ma in the final extensional phase of the Panafrican continental collision and connected metamorphic/metasomatic event. Model TNd ages suggest that the melts were produced by partial melting of 3. 5 Ga partially evaporitic continental crust. The studied pegmatites and genetically associated syenitic rocks are very rare examples for crustal silicocarbonatitic melts generated in a Panafrican collisional setting. The overwhelming majority of carbonatites and associated peralkaline rocks are mantle derived, much poorer in phosphate and sulfate and found in a cratonic environment. In light of the present results, genetic models for other sulfate- and phosphate-rich magmatic rocks (e. g., phlogopite-apatite-calcite mineralisations in the Grenville-Hasting formation in Canada and in the Sludyanka group in Eastern Siberia) should be reevaluated. © 2012 Springer-Verlag Berlin Heidelberg.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84875400355&doi=10.1007%2fs00531-012-0832-x&partnerID=40&md5=b766721e5d1bde1242d0fb2b046a3b6a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70606
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Technical University of Munich, Gmain Nr. 1, 84424 Isen, Germany; Russian Academy of Sciences, Vernadsky Institute of Geochemistry and Analytical Chemistry, Kossygin str. 19, 119991 Moscow, Russian Federation; Lehrstuhl f. Ingenieurgeologie, Technische Universität München, Arcisstr. 19, 80333 Munich, Germany; Institut für Rechtsmedizin, Ludwig-Maximilians Universität München, Nussbaumstrasse 26, 80336 Munich, Germany; Département des Sciences de la Terre, Faculté des Sciences, Université de Toliara, Toliara, Madagascar

Recommended Citation:
Morteani G.,Kostitsyn Y.A.,Gilg H.A.,et al. Geochemistry of phlogopite, diopside, calcite, anhydrite and apatite pegmatites and syenites of southern Madagascar: Evidence for crustal silicocarbonatitic (CSC) melt formation in a Panafrican collisional tectonic setting[J]. International Journal of Earth Sciences,2013-01-01,102(3)
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