Chronology of multiphase emplacement of the Salmi rapakivi granite-anorthosite complex, Baltic Shield: implications for magmatic evolution

Amelin, Y.; Larin, A. M.; Tucker, Robert D.

doi:10.1007/s004100050285

Cited by 98 publications

(29 citation statements)

References 22 publications

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“…The time gaps between the different pulses are within 3.4 ± 1.5 Ma. The crystallization rate was relatively quick, and not very different from the accuracy of the zircon U-Pb dating ±(1-2) Ma [49] .…”

Section: Discussion and Major Conclusionmentioning

confidence: 99%

Zircon U-Pb geochronological framework of Qitianling granite batholith, middle part of Nanling Range, South China

Zhu

Wang

Zhang

et al. 2009

Sci. China Ser. D-Earth Sci.

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The Qitianling granite batholith (QGB) is located in the southern Hunan Province, middle part of the Nanling Range, South China. Its total exposure area is about 520 km 2 . Based on our 25 single grain zircon U-Pb age data and 7 published data as well as the geological, petrological, and space distribution characteristics, we conclude that QGB is an Early Yanshanian (Jurassic) multi-staged composite pluton. Its formation process can be subdivided into three major stages. The first stage, emplaced at 163-160 Ma with a peak at about 161 Ma, is mainly composed of hornblende-biotite monzonitic granites and locally biotite granites, and distributed in the eastern, northern, and western peripheral parts of the pluton. The second stage, emplaced at 157-153 Ma with a peak at 157-156 Ma, is mainly composed of biotite granites and locally containing hornblende, and distributed in the middle and southeastern parts of the pluton. The third stage, emplaced at 150-146 Ma with a peak at about 149 Ma, is mainly composed of fine-grained (locally porphyritic) biotite granites, and distributed in the middle-southern part of the pluton. Each stage can be further disintegrated into several granite bodies. The first two intrusive stages comprise the major phase of QGB, and the third intrusive stage comprises the additional phase. Many second stage fine-grained granite bosses and dykes intruded into the first stage host granites with clear chilling margin-baking phenomena at their intrusive contacts. They were emplaced in the open fracture space of the earlier stage consolidated rocks. Their isotopic ages are mostly 2-6 Ma younger than their hosts. Conceivably, the time interval from magma emplacement, through cooling, crystallization, solidification, up to fracturing of the earlier stage granites cannot exceed 2-6 Ma. During the Middle-Late Jurassic in the Qitianling area and neighboring Nanling Range, the coeval granitic and basic-intermediate magmatic activities were widely developed. It indicates that the Early Yanshanian period was the culmination time of magmatic activities in this region. The Nanling Range was under a post-orogenic, intracontinental geotectonic environment with an obvious lithospheric extension and thinning. The crust-mantle interaction played an important role in formation of granitic rocks in this region.

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Section: Discussion and Major Conclusionmentioning

confidence: 99%

Zircon U-Pb geochronological framework of Qitianling granite batholith, middle part of Nanling Range, South China

Zhu

Wang

Zhang

et al. 2009

Sci. China Ser. D-Earth Sci.

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“…(c) The UÁ/Pb ages of the Mazury A-type granitoids can be correlated with the Ragunda complex of central Sweden and the Salmi complex of Russia that are also related to major E Á/W (or NEÁ/SW) directed lithospheric discontinuities implying incipient or aborted rifting (Amelin et al, 1997). (Puura and Flodén, 1999).…”

Section: Discussionmentioning

confidence: 99%

“…Ri, Riga, 1584 Á/1574 Ma . S, Salmi rapakivi granite Á/anorthosite complex, 1546.7 Á/1530 Ma (Amelin et al, 1997). W, Wiborg complex, 1645 Á/1615 Ma (Alviola et al, 1999).…”

Section: Discussionmentioning

confidence: 99%

“…8) and is probably an eastward extension of the Mazury complex. Geochronologically, the Mazury complex correlates with the Ragunda rapakivi complex and several smaller complexes in central Sweden dated between 1530 and 1470 Ma (Persson, 1999) and the 1547 Á/1530 Ma Salmi rapakivi graniteanorthosite complex (Amelin et al, 1997). These are in a peripheral position in the Palaeoproterozic metamorphic (Svecofennian) crust of the Fennoscandian Shield (Fig.…”

Section: Ar á/Ar Agesmentioning

confidence: 99%

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U–Pb and Ar–Ar geochronology of anorogenic granite magmatism of the Mazury complex, NE Poland

Dörr

Bełka

Marheine

et al. 2002

Precambrian Research

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“…Age/Ma References Rämö et al (1996) 26 Nordingrå 1578 ± 19 Welin and Lundqvist (1984) 27 Å land 1576-1568 Suominen (1991) 28 Laitila 1570-1540 Vaasjoki (1977) 29 Salmi 1547-1530 Amelin et al (1997) 30 Mazury complex 1525-1499 Claesson et al 1995;Dörr et al (2002) (2002) Högabjär gneiss leucosome…”

Section: Intrusionunclassified

Mesoproterozoic (1.47–1.44 Ga) orogenic magmatism in Fennoscandia; Baddeleyite U–Pb dating of a suite of massif-type anorthosite in S. Sweden

Brander¹

2007

Int J Earth Sci (Geol Rundsch)

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The Jönköping Anorthositic Suite (JAS) in S. Sweden has characteristics typical for (Proterozoic) massiftype anorthosites. The interstitial liquid of these plagioclase-porphyritic rocks solidified at 1,455 ± 6 Ma, as determined by U-Pb isotope analysis of baddeleyite. The JAS developed during a regional 1.47-1.44 event in Fennoscandia that generated widespread mafic magmatism (basalts, and diabase dykes and sills) in the north and emplacement of felsic plutons in the south. The event of 1.47-1.44 Ga magmatism in Fennoscandia largely coincides in age with dynamic high-grade metamorphism in SW Sweden and was probably related to convergent activemargin processes during the Danopolonian orogeny.

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Chronology of multiphase emplacement of the Salmi rapakivi granite-anorthosite complex, Baltic Shield: implications for magmatic evolution

Cited by 98 publications

References 22 publications

Zircon U-Pb geochronological framework of Qitianling granite batholith, middle part of Nanling Range, South China

Zircon U-Pb geochronological framework of Qitianling granite batholith, middle part of Nanling Range, South China

U–Pb and Ar–Ar geochronology of anorogenic granite magmatism of the Mazury complex, NE Poland

Mesoproterozoic (1.47–1.44 Ga) orogenic magmatism in Fennoscandia; Baddeleyite U–Pb dating of a suite of massif-type anorthosite in S. Sweden

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