Geology and geochemistry of the granitic and related rocks of the Littletion and Thelma area, Eastern Piedmont, North Carolina / by Allen T. Grundy.
| Author/creator | Grundy, Allen T. author. |
| Other author | Spruill, Richard K., degree supervisor. |
| Other author | East Carolina University. Department of Geology. |
| Format | Theses and dissertations |
| Production | 1982. |
| Description | viii, 74 leaves, 10 leaves of plates : illustrations, maps ; 28 cm |
| Supplemental Content | Access via ScholarShip |
| Subjects |
| Summary | In the Littleton and Thelma area, three granitic rock units (A, B, and C) and a blastomylonite (D) have been recognized on the basis of mapping, petrographic analyses, and chemical analyses (major elements and Rb, Sr, Y, Zr, and Ba). These rocks have a prominent NNE foliation, and they have been subjected to greenschist facies metamorphism and cataclastic deformation. One of the granites (Unit C), a coarse-grained, porphyritic, biotite granite (dated at 292 ± 30 my) is a phase of the Butterwood Creek Pluton (Farrar and others, 1981). The other granites (Units A and B), are fine to medium-grained biotite granite and medium to coarse-grained biotite granite, respectively. All granites in the study area share petrographic and chemical characteristics, and they were probably emplaced during the same intrusive episode. The blastomylonite is fine-grained and leucocratic and its major and trace element chemistry is somewhat dissimilar to results from the other granitic units. On a K₂O-Na₂O-CaO diagram, the granitic rock units plot with Hercynian granites of the Piedmont, and possess similarities in trace element content to these late Paleozoic intrusions. Elongate blocks of schist derived from the Raleigh belt are dispersed throughout the granitic rocks. Metavolcanic rocks, characteristic of the Carolina slate belt, are found on the eastern side of the study area. Mesozoic (?) subophitic to intergranular diabase dikes cut the older rocks. These have alkalic affinities based on low SiO₂ and traces of normative nepheline. |
| General note | "Presented to the faculty of the Department of Geology ... in partial fulfillment of the requirements for the degree Master of Science in Geology." |
| General note | Advisor: Richard K. Spruill |
| Dissertation note | M.S. East Carolina University 1982 |
| Bibliography note | Includes bibliographical references (leaves 52-54). |
| Genre/form | dissertations. |
| Genre/form | Academic theses. |
| Genre/form | Academic theses. |
| Genre/form | Thèses et écrits académiques. |
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|---|---|---|---|---|
| Joyner | University Archives | ASK AT SPECIAL COLLECTIONS DESK | ✔ Available | Request Material |
| Joyner | NC Microforms | MICROFILM | ✔ Available | |
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