| Abstract: | A newly recognized suite of trondhjemite-tonalite and dacitic gneiss forms a 10 km wide belt of rocks within the Mount Holly Complex in the central part of the Green Mountain massif. Field relationships and chemistry indicate that these gneisses are calc-alkaline, volcanic, and hypabyssal plutonic rocks older than the Middle Proterozoic regional deformation that affected the Mount Holly Complex. U-Pb zircon dates indicate ages as great as 1.35 Ga for crystallization of the volcanic protoliths and for intrusion of crossing trondhjemite. Tonalitic plutonism continued until 1.31 Ga. The Mount Holly intrusives and volcanics may have formed during 1.35-1.31 Ga ensialic volcanic-arc activity, contemporaneous with ensimatic arc activity during the early part of the Elzevirian phase of the Grenville orogeny. -from Authors |
| Genre: | Article |
| ProdID: | 70016573 |
| Citation Author: | Ratcliffe, N. M.; Aleinikoff, J. N.; Burton, W. C.; Karabinos, P. |
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| Citation End Page: | 93 |
| Citation Issue: | 1 |
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| Citation Language: | English |
| Citation Larger Work Title: | Canadian Journal of Earth Sciences |
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| Citation Number Of Pages: | 17 |
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| Citation Search Results Text: | Trondhjemitic, 1.35-1.31 Ga gneisses of the Mount Holly Complex of Vermont: evidence for an Elzevirian event in the Grenville Basement of the United States Appalachians; 1991; Article; Journal; Canadian Journal of Earth Sciences; Ratcliffe, N. M.; Aleinikoff, J. N.; Burton, W. C.; Karabinos, P. |
| Citation Start Page: | 77 |
| Citation Volume: | 28 |
| Citation Year: | 1991 |
| Type: | citation/reference |
| Text: | Trondhjemitic, 1.35-1.31 Ga gneisses of the Mount Holly Complex of Vermont: evidence for an Elzevirian event in the Grenville Basement of the United States Appalachians; 1991; Article; Journal; Canadian Journal of Earth Sciences; Ratcliffe, N. M.; Aleinikoff, J. N.; Burton, W. C.; Karabinos, P. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Tue, 1 Jan 1991 00:00 -0600 |
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