ZHANG, SHUAN-HONG, ZHAO, YUE, SONG, BIAO, LIU, DUN-YI (2007) Petrogenesis of the Middle Devonian Gushan diorite pluton on the northern margin of the North China block and its tectonic implications. Geological Magazine, 144 (3) 553-568 doi:10.1017/s0016756807003275
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Petrogenesis of the Middle Devonian Gushan diorite pluton on the northern margin of the North China block and its tectonic implications | ||
| Journal | Geological Magazine | ||
| Authors | ZHANG, SHUAN-HONG | Author | |
| ZHAO, YUE | Author | ||
| SONG, BIAO | Author | ||
| LIU, DUN-YI | Author | ||
| Year | 2007 (May) | Volume | 144 |
| Issue | 3 | ||
| Publisher | Cambridge University Press (CUP) | ||
| DOI | doi:10.1017/s0016756807003275Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 260041 | Long-form Identifier | mindat:1:5:260041:7 |
| GUID | 0 | ||
| Full Reference | ZHANG, SHUAN-HONG, ZHAO, YUE, SONG, BIAO, LIU, DUN-YI (2007) Petrogenesis of the Middle Devonian Gushan diorite pluton on the northern margin of the North China block and its tectonic implications. Geological Magazine, 144 (3) 553-568 doi:10.1017/s0016756807003275 | ||
| Plain Text | ZHANG, SHUAN-HONG, ZHAO, YUE, SONG, BIAO, LIU, DUN-YI (2007) Petrogenesis of the Middle Devonian Gushan diorite pluton on the northern margin of the North China block and its tectonic implications. Geological Magazine, 144 (3) 553-568 doi:10.1017/s0016756807003275 | ||
| In | (2007, May) Geological Magazine Vol. 144 (3) Cambridge University Press (CUP) | ||
| Abstract/Notes | The Gushan diorite pluton, located at the northern margin of the North China block, was emplaced during Middle Devonian times (SHRIMP UâPb zircon age of 390 ± 5 Ma). Rocks from the pluton are characterized by low SiO2 and high alkali contents, and they show monzodiorite compositions in a total alkali v. silica (TAS) plot. They exhibit light REE-enrichment, no to slightly positive Eu anomalies, strong depletion in Rb, Th, U, Nb, Ta, P, Zr, Hf and Ti, enrichment in Ba, K and Sr, low contents of Y and Yb, and high Sr/Y ratios. They have a relatively narrow range of isotopic compositions with initial 87Sr/86Sr ratios of ⌠0.7050, ΔNd(T) values of â9.5 to â7.5 and zircon ΔHf(T) values from â11.8 to â5.8. These features are remarkably similar to another Middle Devonian intrusion, the Shuiquangou syenitic complex at the northern margin of the North China block. These similarities suggest that the two intrusions probably have a common origin. They were considered to be derived from a type I enriched mantle, ultimately with some involvement of ancient lower crustal components, and were likely emplaced in a back-arc extension environment related to southward subduction of the Palaeo-Asian oceanic plate or during the cessation of the subduction. Aluminium-in-hornblende barometry studies of the Middle Devonian Gushan pluton yielded emplacement depths of about 18 km. Combined with previous geobarometry results on the Carboniferous plutons within the Inner Mongolia Palaeo-uplift on the northern margin of the North China block, it is inferred that the uplift and exhumation of the plutons within the Inner Mongolia Palaeo-uplift during Middle Devonian to Late Carboniferous times were not as distinct as those during Late Carboniferous to Early Jurassic times, and the strong uplift and exhumation of the Inner Mongolia Palaeo-uplift were achieved during Late Carboniferous to Early Jurassic times. | ||
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