No description available.

No description available.

No description available.

No description available.

No description available.

In Hancock County, Maine, a small mineralized fine-grained granite lies at the southeast portion of the felsic Lucerne pluton, near the contact with the Blue Hill pluton. The Cambro-Ordovician, chlorite-rich Ellsworth schist occurs to the north and south of the younger fine-grained granite and is the host to many sulfide deposits within the region. Within the study area the fine-grained granite and the Ellsworth schist have been contact metamorphosed by the Devonian age Lucerne. The fine-grained granite is a quartz-rich, leucocratic, two-mica, two-feldspar granitoid. It is marked by the presence of 1) sulfides (pyrrhotite, pyrite, loellingite, arsenopyrite, chalcopyrite, and sphalerite) 2) volatile-rich phases such as muscovite, tourmaline, apatite, and chlorite, and 3) high-temperature anhydrous phases such as andalusite and fibrolite. Feldspars have been partially altered to muscovite, and biotite has partially altered to chlorite. Sulfides and tourmaline appear to have formed late in the crystallization sequence. Prior to the intrusion of the Lucerne the fine-grained granite probably cooled to a maximum temperature of about 600°C, and crystallized to form feldspar, biotite, quartz, and muscovite. Andalusite and sillimanite probably formed when the Lucerne intruded; at about 650-725°C and about 1-2 kilobars. Quartz, muscovite, tourmaline and sulfides probably formed during subsequent cooling. Feldspar composition indicate reequilibration with a fluid at about 400°C. Dehydration reactions within the Ellsworth schist probably resulted in the release of metal bearing fluids from the Ellsworth schist and redeposition into the adjacent fine-grained granite. / M.S.

No description available.

This dissertation is a comparative analysis of the yeomanry of Forsyth and Hancock counties in Georgia during the ten years prior to the Civil War. The premise argues that definitive characteristics of yeoman culture can only be found in counties that are dominated the yeomanry. Studies that find yeomen in planter dominated counties are defined those yeomen by the institutions that are created by and serve the planter society.

No description available.

The Lucerne pluton intrudes rocks of the Penobscot formation Ordovician-Silurian (?)), a quartz-rich sulfidic pelite that contains muscovite, biotite, cordierite, andalusite, plagioclase, pyrrhotite and graphite outside the thermal aureole; and the Bucksport formation (=Vassalboro, Silvian-Devonian (?)), a calcareous, quartzofeldspathic pelite that contains chlorite, biotite, celadonitic muscovite, albite, and ilmenite outside the Lucerne aureole. Within the aureole, the Penobscot formation contains K-feldspar plus andalusite as the result of muscovite reaction with quartz. Corundum occurs at the immediate contact of the granite from the. reaction of the remaining muscovite. The Bucksport formation is recrystallized within the aureole to a purple and green gneiss. The gneissic banding is not present in the low grade calcareous rocks, and represents the segregation of biotite-rich and calc-silicate-rich bands. Vertical or sleepy dipping, the banding parallels both the regional strike and the intrusive contact, and is probably the result of both mechanical and chemical effects. The following sequence of assemblages (+ quartz) is found in the calcareous portions of the Bucksport formation as the Lucerne contact is approached: a) chl + bio + musc + cc + albite; b) bio + cc + plag (An₂₅₋₃₃); c) actinolite + cc + K-feldspar + plag (An₄₀); d) diopside + zoisite + sphene +cc+ plag (An₈₅₋₉₀). Interbedded pelites contain biotite + quartz + plagioclase + pyrite with corundum occurring at the igneous contact in quartz free beds. The mineral assemblages in the Lucerne aureole indicate a lithostatic pressure between 1000 and 3000 bars during metamorphism with temperatures between 700°C and 450°C. Isobaric univariant assemblages in the calc-silicate beds indicate buffering of H₂O/CO₂ fluids produced by prograde reactions. H₂O rich fluids that produced zoisite were probably associated with late stage crystallization of the Lucerne. / Master of Science