Localized uplift in the Scottish Dalradian
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| Authors: | Dempster, T. J. |
|---|---|
| Author Affiliations: | Primary: Univ. Edinburgh, Grant Inst. Geol., Edinburgh, United Kingdom |
| Volume Title: | Nature (London) |
| Source: | Nature (London), 307(5947), p.156-159. Publisher: Macmillan Journals, London, United Kingdom. ISSN: 0028-0836 |
| Publication Date: | 1984 |
| Note: | In English. 25 refs.; illus. incl. 5 anal., 1 table, sketch map |
| Summary: | Rb/Sr mica ages are reported from the Dalradian meta-sediments of the Angus region, Scottish Highlands, in a study of the uplift history of this classic metamorphic terrain. The samples come from across the Barrovian metamorphic zones and provide evidence of diachroneity in both metamorphism and later cooling. Thus, the oldest mineral ages, and hence earliest cooling, are found in the highest grade metamorphic rocks to the north. The results show the importance of tectonically controlled, localized uplift processes. Given that erosion is an important influence on the thermal development of metamorphic rocks, the constant or steadily decaying isostatic uplift rates, often assumed in models of orogenic belts, may be a marked oversimplification of the real events. [T.R.] |
| Subjects: | Absolute age; Cambrian; Cooling; Dalradian; Dates; Geochronology; Grade; Isostasy; Metamorphic rocks; Metamorphism; Mica group; Orogenic belts; Paleozoic; Rb/Sr; Regional metamorphism; Sheet silicates; Silicates; Temperature; Thermal history; Uplifts; Whole rock; Europe; Great Britain; Northern Highlands; Scotland; United Kingdom; Western Europe; Barrovian Zone |
| Coordinates: | N563500 N570000 W0023000 W0033000 |
| Abstract Numbers: | 84M/3639 |
| Record ID: | 1984045979 |
| Copyright Information: | GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom |
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| 001 | 1984045979 | ||
| 003 | ViAlAGI | ||
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| 034 | 0 | |a a |d W0033000 |e W0023000 |f N570000 |g N563500 | |
| 040 | |a ViAlAGI |c ViAlAGI | ||
| 072 | 7 | |a 03 |2 georeft | |
| 100 | 1 | |a Dempster, T. J. |e analytic author |u Univ. Edinburgh, Grant Inst. Geol., Edinburgh | |
| 245 | 1 | 0 | |a Localized uplift in the Scottish Dalradian |
| 300 | |a p. 156-159 | ||
| 500 | |a In English. 25 refs. | ||
| 500 | |a Abstract number: 84M/3639 | ||
| 500 | |a Abstractor: T.R. | ||
| 500 | |a Affiliation: Univ. Edinburgh, Grant Inst. Geol.; Edinburgh; GBR; United Kingdom | ||
| 500 | |a Key title: Nature (London) | ||
| 500 | |a Source note: Nature (London), 307(5947), p.156-159. Publisher: Macmillan Journals, London, United Kingdom. ISSN: 0028-0836 | ||
| 500 | |a Publication type: journal article | ||
| 504 | |b 25 refs. | ||
| 510 | 3 | |a GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom | |
| 520 | |a Rb/Sr mica ages are reported from the Dalradian meta-sediments of the Angus region, Scottish Highlands, in a study of the uplift history of this classic metamorphic terrain. The samples come from across the Barrovian metamorphic zones and provide evidence of diachroneity in both metamorphism and later cooling. Thus, the oldest mineral ages, and hence earliest cooling, are found in the highest grade metamorphic rocks to the north. The results show the importance of tectonically controlled, localized uplift processes. Given that erosion is an important influence on the thermal development of metamorphic rocks, the constant or steadily decaying isostatic uplift rates, often assumed in models of orogenic belts, may be a marked oversimplification of the real events. | ||
| 650 | 7 | |a Absolute age |2 georeft | |
| 650 | 7 | |a Cambrian |2 georeft | |
| 650 | 7 | |a Cooling |2 georeft | |
| 650 | 7 | |a Dalradian |2 georeft | |
| 650 | 7 | |a Dates |2 georeft | |
| 650 | 7 | |a Geochronology |2 georeft | |
| 650 | 7 | |a Grade |2 georeft | |
| 650 | 7 | |a Isostasy |2 georeft | |
| 650 | 7 | |a Metamorphic rocks |2 georeft | |
| 650 | 7 | |a Metamorphism |2 georeft | |
| 650 | 7 | |a Mica group |2 georeft | |
| 650 | 7 | |a Orogenic belts |2 georeft | |
| 650 | 7 | |a Paleozoic |2 georeft | |
| 650 | 7 | |a Rb/Sr |2 georeft | |
| 650 | 7 | |a Regional metamorphism |2 georeft | |
| 650 | 7 | |a Sheet silicates |2 georeft | |
| 650 | 7 | |a Silicates |2 georeft | |
| 650 | 7 | |a Temperature |2 georeft | |
| 650 | 7 | |a Thermal history |2 georeft | |
| 650 | 7 | |a Uplifts |2 georeft | |
| 650 | 7 | |a Whole rock |2 georeft | |
| 651 | 7 | |a Europe |2 georeft | |
| 651 | 7 | |a Great Britain |2 georeft | |
| 651 | 7 | |a Northern Highlands |2 georeft | |
| 651 | 7 | |a Scotland |2 georeft | |
| 651 | 7 | |a United Kingdom |2 georeft | |
| 651 | 7 | |a Western Europe |2 georeft | |
| 653 | |a Barrovian Zone | ||
| 773 | 0 | |t Nature (London) |d London : Macmillan Journals, Jan. , 12 1984 |x 0028-0836 |y NATUAS |n Nature (London), 307(5947), p.156-159. Publisher: Macmillan Journals, London, United Kingdom. ISSN: 0028-0836 Publication type: journal article |g Vol. 307, no. 5947 |h illus. incl. 5 anal., 1 table, sketch map | |