### Abstract

Original language | English |
---|---|

Title of host publication | 29th international geological congress |

Pages | 161-168 |

Number of pages | 8 |

Publication status | Published - 1994 |

### Publication series

Name | 29th international geological congress |
---|---|

Volume | 32 |

### Fingerprint

### Keywords

- Igneous and metamorphic petrology
- P-T conditions
- batholiths
- crust
- density
- depth
- diapirs
- dikes
- dynamics
- felsic composition
- fluid dynamics
- fractures
- heat flow
- host rocks
- intrusions
- mafic magmas
- magmas
- melts
- rates
- viscosity
- volatiles

### Cite this

*29th international geological congress*(pp. 161-168). (29th international geological congress; Vol. 32).

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*29th international geological congress.*29th international geological congress, vol. 32, pp. 161-168.

**The ascent of felsic magmas in dykes
Crustal anatexis and ascent of felsic magmas.** / Petford, Nick; Lister, John R; Kerr, Ross C; Brown, Michael (editor).

Research output: Contribution to Book/Report types › Chapter › Research › peer-review

TY - CHAP

T1 - The ascent of felsic magmas in dykes Crustal anatexis and ascent of felsic magmas

AU - Petford, Nick

AU - Lister, John R

AU - Kerr, Ross C

AU - Brown, Michael (editor)

PY - 1994

Y1 - 1994

N2 - The results of a thermal and fluid-dynamical analysis are presented that allow geologists to estimate the critical dyke or fracture width (w (sub c) ) necessary for the transport of felsic magma through the crust without control by solidification. The principal geological variables required to estimate w (sub c) are the magmatic viscosity (mu ), the density and temperature contrasts (Delta rho and Delta T) between magma and country rock, and the height of ascent H. The results show that for typical values of mu and Delta rho , and for transport distances of 20 to 30 km, the critical dyke width is constrained to lie between about 2 and 20 m.

AB - The results of a thermal and fluid-dynamical analysis are presented that allow geologists to estimate the critical dyke or fracture width (w (sub c) ) necessary for the transport of felsic magma through the crust without control by solidification. The principal geological variables required to estimate w (sub c) are the magmatic viscosity (mu ), the density and temperature contrasts (Delta rho and Delta T) between magma and country rock, and the height of ascent H. The results show that for typical values of mu and Delta rho , and for transport distances of 20 to 30 km, the critical dyke width is constrained to lie between about 2 and 20 m.

KW - Igneous and metamorphic petrology

KW - P-T conditions

KW - batholiths

KW - crust

KW - density

KW - depth

KW - diapirs

KW - dikes

KW - dynamics

KW - felsic composition

KW - fluid dynamics

KW - fractures

KW - heat flow

KW - host rocks

KW - intrusions

KW - mafic magmas

KW - magmas

KW - melts

KW - rates

KW - viscosity

KW - volatiles

UR - http://www.mendeley.com/research/ascent-felsic-magmas-dykescrustal-anatexis-ascent-felsic-magmas

M3 - Chapter

SN - 0024-4937

T3 - 29th international geological congress

SP - 161

EP - 168

BT - 29th international geological congress

ER -