Partial fusion of basic granulites at 5 to 15 kbar: implications for the origin of TTG magmas

Springer, Wilhelm; Seck, H. A.

doi:10.1007/s004100050263

Cited by 304 publications

(139 citation statements)

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“…Comparing the present model with melting experiments of various basaltic composition at relatively low pressures (<10kb) and variable H 2 O conditions, temperatures required for 40% melting of lower crustal rock ranges from 950˚C (10kb, 2% H 2 O, Fig. 2 of Nakajima and Arima, 1998) to 1125˚C (5kb, 1% H 2 O, Figure 3 of Springer and Seck, 1997).…”

Section: Anatexis Origin Of the Ashigawa Tonogi Tonalitic Parental Magmamentioning

confidence: 69%

“…8). The experimental data by Springer and Seck (1997) suggest that the temperature conditions required for the 40% melting of hydrous mafic lower crustal rock is probably more than 1100°C. However, the temperature conditions needed for the Tonogi parental magma is difficult to define since the degree of melting highly depends on source composition, pressure and amount of available H 2 O at the melting region.…”

Section: Anatexis Origin Of the Ashigawa Tonogi Tonalitic Parental Magmamentioning

confidence: 98%

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Petrogenesis of Ashigawa and Tonogi granitic intrusions, southern part of the Miocene Kofu Granitic Complex, central Japan: M-type granite in the Izu arc collision zone

Saito

Arima

Nakajima

et al. 2004

Journal of Mineralogical and Petrological Sciences

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The Ashigawa and the Tonogi intrusions comprise the southern part of the Miocene Kofu Granitic Complex (KGC), which is the largest pluton exposed in the Izu collision zone. The Ashigawa intrusion mainly consists of tonalite and subordinate amounts of trondhjemite, and the Tonogi intrusion is predominantly composed of tonalite. The rocks in both intrusions are classified as M type granite. These are characterized by relatively low K 2 O (<1.9 wt.%) and Rb (<48 ppm) and LREE enriched chondrite normalized REE patterns with a marked negative Eu anomaly. Compared to the Tanzawa tonalites distributed in the south of the KGC, the Ashigawa and Tonogi granitic rocks have higher LILE, REE and Sr isotope compositions at a given whole rock SiO 2 content. Although the Ashigawa intrusion has distinctly different petrographical and geochemical characteristics from the Tonogi intrusion, both intrusions exhibit nearly identical Sr isotopic composition (0.7037 0.7043 at 13Ma) and well defined variation in whole rock compositions, suggesting that they are comagmatic. The crystal fractionation modeling involving removals of amphibole, plagioclase and magnetite from a tonalitic parental magma composition well represents the major and trace element variation of the Ashigawa and Tonogi granitic rocks. The Rayleigh fractionation modeling for whole rock REE abundance is also in a good agreement with the observed whole rock data. Mass balance modeling suggests that the proposed tonalitic parental magma can be derived by 40 % melting of hydrous basalt compositionally similar to the basalt occurring in the rift basin of northern Izu Bonin arc. Anatexis of hydrous basaltic lower crust of the northern Izu Bonin arc is a likely process for the formation of Ashigawa Tonogi parental magma.

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Section: Anatexis Origin Of the Ashigawa Tonogi Tonalitic Parental Magmamentioning

confidence: 69%

Section: Anatexis Origin Of the Ashigawa Tonogi Tonalitic Parental Magmamentioning

confidence: 98%

Petrogenesis of Ashigawa and Tonogi granitic intrusions, southern part of the Miocene Kofu Granitic Complex, central Japan: M-type granite in the Izu arc collision zone

Saito

Arima

Nakajima

et al. 2004

Journal of Mineralogical and Petrological Sciences

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“…4f). Rapp and Watson (1995); Springer and Seck (1997); Rapp et al (1999); Skjerlie and Patiño Douce (2002), and references therein. Fields of adakites inferred to be derived from subducting oceanic crust is after Wang et al (2006).…”

Section: Whole Rock Sr-nd Isotopic Compositionsmentioning

confidence: 99%

An Early Permian (ca. 280Ma) silicic igneous province in the Alxa Block, NW China: A magmatic flare-up triggered by a mantle-plume?

Wei

Wang

et al. 2014

Lithos

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“…In the following sections, we compare K 2 O and SiO 2 contents of the northern China adakites to data from partial melting experiments to constrain their source compositions. , melt data [95][96][97][98][99][100][101][102][103][104][105][106][107][108][109]); (b) compared with experimental partial melts of low-K basalts [110][111][112][113][114][115][116][117][118][119]; (c) compared with experimental partial melts of middle-K and high-K basalts [44,87,116,120,121]; (d) SiO 2 vs. K 2 O for Mesozoic xenolith granulites, terrane granulites and Precambrian basic volcanic rocks in the North China Craton (Xinyang granulite xenoliths [122], Inner Mongolia granulites [123], terrane granulites [124,[125][126][127], and Precambrian basic volcanic rocks [128]). …”

Section: Source Composition Of Northern China Adakitesmentioning

confidence: 99%

Adakitic rocks and destruction of the North China Craton: Evidence from experimental petrology and geochemistry

Xiong

Liu

Zhu

et al. 2011

Sci. China Earth Sci.

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The general temporal-spatial consistency for the formation of adakitic rocks and lithospheric thinning in northern China provide a window to examine the processes and mechanism for the destruction of the North China Craton. With experimental petrology data, this paper demonstrates that the adakitic rocks in northern China are the products of partial melting of middle-to high-potassic metabasalts at the base of the lower continent crust. Based on the TiO 2 solubility model, many adakitic rocks in Dabie, Jiaodong and the northern part of the craton appear to have been saturated with TiO 2 . This indicates the presence of a Ti-rich accessory phase in their source regions. This phase must be rutile based on the decreasing Nb/La with increasing La/Yb in the adakitic rocks. The adakitic magmas were, thus, derived from a depth of more than 50 km, based on pressures (higher than 1.5 GPa) for the stability of rutile in a metabasalt system. Because present-day crustal thickness is generally only 35 km, we suggest that the destruction of the North China Craton may have led to at least 15 km of thinning or delamination of the crust.

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Partial fusion of basic granulites at 5 to 15 kbar: implications for the origin of TTG magmas

Cited by 304 publications

References 0 publications

Petrogenesis of Ashigawa and Tonogi granitic intrusions, southern part of the Miocene Kofu Granitic Complex, central Japan: M-type granite in the Izu arc collision zone

Petrogenesis of Ashigawa and Tonogi granitic intrusions, southern part of the Miocene Kofu Granitic Complex, central Japan: M-type granite in the Izu arc collision zone

An Early Permian (ca. 280Ma) silicic igneous province in the Alxa Block, NW China: A magmatic flare-up triggered by a mantle-plume?

Adakitic rocks and destruction of the North China Craton: Evidence from experimental petrology and geochemistry

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