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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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