| Abstract: | Oxygen isotope studies of granitic rocks from the 2.7 b.y.-old composite Giants Range batholith show that: (1) ??(O18)quartz values of 9 to 10 permil characterize relatively uncontaminated Lower Precambrian, magmatic granodiorites and granites; (2) granitic rocks thought to have formed by static granitization have ??(O18)quartz values that are 1 to 2 permil higher than magmatic granitic rocks; (3) satellite leucogranite bodies have values nearly identical to those of the main intrusive phases even where they transect O18-rich metasedimentary wall rocks; (4) oxygen isotopic interaction between the granitic melts and their O18-rich wall rocks was minimal; and (5) O18/O18 ratios of quartz grains in a metasomatic granite are largely inherited from the precursor rock, but during the progression - sedimentary parent ??? partially granitized parent ??? metasomatic granite ??? there is gradual decrease in ??(O18)quartz by 1 to 2 permil. ?? 1974. |
| Genre: | Article |
| ProdID: | 70009976 |
| Citation Author: | Viswanathan, S. |
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| Citation End Page: | 34 |
| Citation Issue: | 1 |
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| Citation Language: | English |
| Citation Larger Work Title: | LITHOS |
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| Citation Number Of Pages: | 6 |
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| Citation Publisher: | Elsevier |
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| Citation Search Results Text: | Oxygen isotope studies of early Precambrian granitic rocks from the Giants Range batholith, northeastern Minnesota, U.S.A.; 1974; Article; Journal; LITHOS; Viswanathan, S. |
| Citation Start Page: | 29 |
| Citation Volume: | 7 |
| Citation Year: | 1974 |
| Type: | citation/reference |
| Text: | Oxygen isotope studies of early Precambrian granitic rocks from the Giants Range batholith, northeastern Minnesota, U.S.A.; 1974; Article; Journal; LITHOS; Viswanathan, S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/0024-4937(74)90035-8 |
| Date Other: | Tue, 1 Jan 1974 00:00 -0600 |
| Publisher: | Elsevier |
