Bibliographic Citation
| Document | For copies of Journal Articles, please contact the Publisher or your local public or university library and refer to the information in the Resource Relation field. For copies of other documents, please see the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or Document Availability. |
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| Title | Potential contributions of metamorphic petrology studies in an ultra-deep drillhole in the southern Appalachians |
| Creator/Author | Speer, J.A. |
| Publication Date | 1985 Jan 01 |
| OSTI Identifier | OSTI ID: 6273528 |
| Report Number(s) | CONF-8510489- |
| Other Number(s) | CODEN: GAAPB |
| Resource Type | Conference |
| Specific Type | Journal Article |
| Resource Relation | Geol. Soc. Am., Abstr. Programs ; Vol/Issue: 17; 98. annual meeting of the Geological Society of America; 28 Oct 1985; Orlando, FL, USA |
| Research Org | Virginia Tech., Blacksburg (USA) |
| Subject | 580300 -- Mineralogy, Petrology, & Rock Mechanics-- (-1989); METAMORPHIC ROCKS-- CHEMICAL PROPERTIES;METAMORPHIC ROCKS-- PETROGENESIS;METAMORPHIC ROCKS-- PHYSICAL PROPERTIES;NORTH CAROLINA-- METAMORPHIC ROCKS;VIRGINIA-- METAMORPHIC ROCKS; AGE ESTIMATION;BOREHOLES;EXPLORATORY WELLS;GEOCHEMISTRY;GEOLOGIC FAULTS;GEOLOGIC HISTORY;GEOLOGIC MODELS;METAMORPHISM;PETROLOGY |
| Related Subject | CAVITIES;CHEMISTRY;FEDERAL REGION III;FEDERAL REGION IV;GEOLOGIC FRACTURES;GEOLOGIC STRUCTURES;GEOLOGY;NORTH AMERICA;ROCKS;USA;WELLS |
| Description/Abstract | The proposed, ultra-deep hole in the southeast U.S. will penetrate allochthonous, medium- to high-grade metamorphic rocks of the Inner Piedmont and Blue Ridge thrust sheets.^It is anticipated that the hole will then encounter autochthonous low-grade, metasedimentary cover rocks before bottoming out in crystalline Precambrian basement rocks.^Metamorphic petrology in the recent past has concentrated on unraveling the physical and chemical history (P, T, X/sub fluid/, etc.) of metamorphic rocks.^The techniques that have been developed are ideally suited to the study of relatively limited samples from drill core.^Detailed studies of the allochthonous and autochthonous rocks from the drillhole, combined with comparable studies of the surface rocks, by metamorphic petrologists experimented with these approaches, would give a 3-dimensional picture of the PTX evolution in the region of the ultra-deep hole, and thus an idea of the geometrical, chemical, and physical changes the rocks experienced.^This would place constraints on conditions of the rocks before and after thrusting and thus any tectonic models of thrusting in the southern Appalachians.^With limited sampling this could be a problem, with more complete sampling it will be an advantage.^The metamorphic petrology of the rocks will provide basic support for the other studies of the drill core and drillhole, most notably geochronology and stable isotopes.^It should not be forgotten that in addition to the historical metamorphism, the expected, present-day conditions in the drillhole are those of burial metamorphism.^The hole will present an excellent opportunity to study such active metamorphic conditions. |
| Country of Publication | United States |
| Language | English |
| Format | Pages: 723 |
| System Entry Date | 2001 May 13 |
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