Igneous evolution of a complex laccolith-caldera, the Solitario, Trans-Pecos Texas: Implications for calderas and subjacent plutons
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Abstract
The Solitario is a large, combination laccolith and caldera (herein termed “laccocaldera”), with a 16-km-diameter dome over which developed a 6×2 km caldera. This laccocaldera underwent a complex sequence of predoming sill, laccolith, and dike intrusion and concurrent volcanism; doming with emplacement of a main laccolith; ash-flow eruption and caldera collapse; intracaldera sedimentation and volcanism; and late intrusion. Detailed geologic mapping and 40Ar/39Ar dating reveal that the Solitario evolved over an interval of approximately 1 m.y. in three distinct pulses at 36.0, 35.4, and 35.0 Ma. The size, duration, and episodicity of Solitario magmatism are more typical of large ash-flow calderas than of most previously described laccoliths.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Igneous evolution of a complex laccolith-caldera, the Solitario, Trans-Pecos Texas: Implications for calderas and subjacent plutons |
| Series title | Geological Society of America Bulletin |
| DOI | 10.1130/0016-7606(1997)109<1036:IEOACL>2.3.CO;2 |
| Volume | 109 |
| Issue | 8 |
| Year Published | 1997 |
| Language | English |
| Publisher | Geological Society of America |
| Description | 19 p. |
| First page | 1036 |
| Last page | 1054 |
| Country | United States |
| State | Texas |
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