| Abstract: | The Big Maria Mountains of SE California preserve evidence of a large-scale fluid flux that accompanied regional metamorphism in late Cretaceous time. Neither magmatism nor radioactive heat sources are adequate to explain the T of metamorphism. Simultaneously crystallizing plutons at different levels within the crust could have contributed to the overall hot fluid flux. A fluid:rock ratio of 17:1 may be calculated given average conditions of 3 kbar, 500oC, an infiltrating fluid of composition XH2O = 1.0, an equilibrium fluid composition of XH2O = 0.97, and 90% wollastonite in the final rock form the reaction quartz + calcite = CO2 + wollastonite. The minimum quantity of fluid of 1.7 rock volume was estimated to pass through the area if the fluid was approximately at granite solidus T at the start. Deep penetrative structures within the crust may have served to channel fluids. -L.C.H. |
| Genre: | Article |
| ProdID: | 70014762 |
| Citation Author: | Hoisch, T. D. |
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| Citation End Page: | 553 |
| Citation Issue: | 5 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geological Society of America Bulletin |
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| Citation Number Of Pages: | 5 |
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| Citation Search Results Text: | Heat transport by fluids during late Cretaceous regional metamorphism in the Big Maria Mountains, southeastern California.; 1987; Article; Journal; Geological Society of America Bulletin; Hoisch, T. D. |
| Citation Start Page: | 549 |
| Citation Volume: | 98 |
| Citation Year: | 1987 |
| Type: | citation/reference |
| Text: | Heat transport by fluids during late Cretaceous regional metamorphism in the Big Maria Mountains, southeastern California.; 1987; Article; Journal; Geological Society of America Bulletin; Hoisch, T. D. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 1987 00:00 -0600 |
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