Geology, petrography, and geochemistry of the Lemon springs Pluton and associated rocks, Lee County, North Carolina / Steven K. Campbell.
| Author/creator | Campbell, Steven K. author. |
| Other author | Spruill, Richard K., degree supervisor. |
| Other author | East Carolina University. Department of Geology. |
| Format | Theses and dissertations |
| Production | [1984] |
| Description | viii, 132 leaves : illustrations (some color), maps ; 28 cm |
| Supplemental Content | Access via ScholarShip |
| Subjects |
| Summary | The Lemon Springs alkali feldspar metagranite is a small (less than 15 km2), early Paleozoic (?), epizonal stock which intrudes Carolina Slate belt metarhyolites approximately 8 kilometers south of Sanford, Lee County, North Carolina. The metagranite and associated rocks are well exposed in the Martin Marietta quarry located 2 kilometers north of Lemon Springs and approximately 2 kilometers east of the Triassic-age Sanford Basin. Field studies indicate that the pluton has had a complex structural history. The granite contains a middle greenschist-facies mineral assemblage characterized by nearly pure end-member composition alkali feldspars, biotite, chlorite, stilpnomelane, phengite, and manganese-rich epidote and garnet. Relative to other Piedmont granites it is characterized by higher concentrations of SO₂, Na20, Ba, and Y, and lower concentrations of CaO, Rb, and Sr. The granite is cut by a bimodal suite of NNW striking alkaline metabasalt and sodic metarhyolite dikes. An older set of low silica, potassic (6 to 9 wt.% K₂O), metabasic dikes may represent metamorphosed lamprophyres. All metamorphosed dikes contain middle greenschist-facies mineral assemblages. These dikes and the granite are intruded by NNW striking Mesozoic tholeiitic dikes characterized by low (45.5 to 49.5 wt.%) SO₂ concentrations. The pluton is partially covered by a thin blanket of lower Cretaceous Coastal Plain sediments. |
| 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 1984 |
| Bibliography note | Includes bibliographical references (leaves 85-96). |
| Genre/form | dissertations. |
| Genre/form | Academic theses. |
| Genre/form | Academic theses. |
| Genre/form | Thèses et écrits académiques. |