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Modal analyses from point counts of Wagener (1965)

Bland 1972 Diorite data. CH-2027. CH-746. Bland 1972 Granodiorite data. Bland 1972 data. CH-10. CH-1014 leucogabbro. CH-57. CH-880. CH-5004 Normalized. CH-150. CH-2401. Modal analyses from point counts of Wagener (1965). Zefg - East Farrington pluton.

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Modal analyses from point counts of Wagener (1965)

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  1. Bland 1972 Diorite data CH-2027 CH-746 Bland 1972 Granodiorite data Bland 1972 data CH-10 CH-1014 leucogabbro CH-57 CH-880 CH-5004 Normalized CH-150 CH-2401 Modal analyses from point counts of Wagener (1965) Zefg - East Farrington pluton QAP ternary diagram plot of mineral point count analyses by Wagener (1965) of 40 samples collected from the East Farrington pluton (including data from the Farrington quadrangle). According to IUGS classification, the rocks plot mainly within the granite field. Normalized whole rock analysis from a sample (CH-5004) collected during the current mapping from Pritchards Mill Creek near the southern tip of University Lake indicates a granodiorite composition. Zgr - Granite of the Chapel Hill pluton QAP ternary diagram plot of normalized whole rock analysis from sample CH-57. Sample collected from new building construction on UNC-Chapel Hill campus. Zgd – Granodiorite Whole rock analysis from sample CH-150, collected from the Duke Forest area, and sample CH-2401, collected from outcrop located east of Boshamer Stadium on UNC campus, indicate a granodiorite composition. Whole rock analysis from sample CH-880 collected from Morgan Creek approximately 2000 feet up stream from University Lake indicates an quartz monzodiorite/granodiorite composition. Zdi – Diorite Whole rock chemical analyses from rock samples of Bland, 1972 which were collected from his diorite bodies within the Meadow Flats pluton were normalized and plotted on QAP diagrams for this study. According to IUGS nomenclature, the rocks plot as quartz monzodiorite and quartz diorite. Zqmd– Quartz monzodiorite Zqmd - Quartz monzodiorite: The rocks within the map areas designated as quartz monzodiorite appear similar to the typical diorite. Rare pinkish alkali feldspar is present in some samples (specifically on the south side of Blackwood Mountain). Whole rock chemical analyses from 9 rock samples of Bland, 1972 which were collected from his granodiorite bodies within the Meadow Flats pluton were normalized and plotted on QAP diagrams for this study. According to IUGS nomenclature, the rocks previously categorized as granodiorite plot as quartz monzodiorite. Zdi-fine – Fine-grained Diorite Whole rock analysis from a sample collected near the intersection of NC Hwy 86 (Airport Road) and Summerview Drive (CH-746) indicates a quartz monzodiorite composition. Zgb – Gabbro Whole rock chemical analyses from rock samples of Bland, 1972 which were collected from his gabbros bodies within the Meadow Flats pluton were normalized and plotted on QAP and Pl/Pyx/Ol diagrams for this study. According to IUGS nomenclature, the composition of the rocks vary from gabbro, quartz gabbro, and quartz monzogabbro. Zum – Ultramafic Whole rock analysis from a sample collected east of Iron Mine Hill (CH-2027) plots within the olivine-clinopyroxenite field on a Ol/Opx/Cpx ternary diagram.

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