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Showing 1 to 20 of 275 for “"petrology"”.
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The Petrology of Underclays
Made available in DSpace on 2014-12-04T19:13:25Z (GMT). No. of bitstreams: 1 0009136.pdf: 7347817 bytes, checksum: b31666f25c5a0f4e370edc42c97606fe (MD5) Previous issue date: 1954
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The Petrology of Glauconite
Made available in DSpace on 2014-12-04T19:14:13Z (GMT). No. of bitstreams: 1 6200682.pdf: 5157322 bytes, checksum: f70712868b0794896cb971b1e1cc56e9 (MD5) Previous issue date: 1961
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Petrology of the Gracefield pluton.
The Gracefield pluton is composed of two distinct syenite intrusions; both of which appear to have been intruded late in the Grenville tectonic and metamorphic history. They both exhibit a well developed concentric mineralogical zoning. They have shonkinitic cores which grade laterally into alkali …
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Petrology of Monadnock Mt., Vt.
Thesis. 1976. M.S.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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Petrology of Tertiary Bentonites of Texas
Made available in DSpace on 2014-12-04T19:13:51Z (GMT). No. of bitstreams: 1 5904559.pdf: 2791033 bytes, checksum: 0bf440d9237b7d6b51383a563c291577 (MD5) Previous issue date: 1959
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Petrology of the Mount Airy granite
Modal analysis on slabs, thin section petrography, microprobe analyses, and geological mapping have been performed on the Mount Airy granite and enclosing country rock. The pluton.is unzoned, simply intruded, and composed of a medium-grained, white granite, containing 33-41% plagioclase (An₁₀₋₂₀), …
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Petrology and geochemistry of the Killdeer carbonates
… of this report to describe and integrate the petrology and geochemistry of these sediments.</p> <p>Fieldwork was conducted during the summer of 1972. Forty-three stratigraphic sections were measured and representative samples of each were collected for further analysis. Seven section were …
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Petrology of the Sutherland Commonage melilitite intrusives
The petrology of the Sutherland Commonage olivine melilitite intrusives have been investigated using petrographic and chemical methods. The occurrence consists of a ring dyke which surrounds a centrally located sill complex. The rock of the ring dyke is a typical melilitite which consists of …
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Structural petrology of planes of liquid inclusions
Thesis. (Ph.D.) Massachusetts Institute of Technology. Dept. of Geology, 1948.
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Petrology of the Roxboro metagranite, North Carolina
The intrusion located at Roxboro, North Carolina is predominantly a light gray to medium gray, microphaneritic granite, now metamorphosed. Phenocrysts of plagioclase, quartz, and perthite are accompanied by porphyroblasts of epidote. Relict igneous textural relationships suggest two possible …
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Early prehistoric petrology: A case study from Leicestershire.
This research focused on the petrographic analysis of prehistoric ceramics within the East Midlands. Prior assessments have been intermittent and not drawn together by a research-based agenda, with a few notable exceptions. This research uses petrographic analysis to shed light on early prehistoric …
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Petrology and geochemistry of high degree mantle melts
Experimental phase equilibria, whole rock major and trace element concentrations, and mineral major and trace element concentrations are used to constrain the petrogenesis of high degree, hydrous melts of the mantle, with particular focus on komatiites from the Barberton Mountainland, South Africa. …
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Petrology of the Numabin Bay intrusions, Reindeer Lake, Saskatchewan
A magmatic origin of a differentiated Precambrian granitic pluton, consisting of quartz diorite, granodiorite, and quartz monzonite, is consistent with the results of petrographic and structural studies. Petrographic modal analyses and accurate plagioclase determinations by the Rittman Zone Method …
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Petrology of the Sentinel Butte Formation (Paleocene), North Dakota
<p> Sedimentary materials of the Sentinel Butte Formation have been petrographically examined using optical and scanning electron micro scope/microprobe techniques. The formation consists of fine-grained materials which generally are classified mineralogically as volcanic litharenites or …
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Petrology of the Syenitic Intrusive Complex, Pleasant Mountain, Maine
Made available in DSpace on 2014-12-11T18:09:55Z (GMT). No. of bitstreams: 1 7207046.pdf: 5385570 bytes, checksum: a255c42e3e7473d682e3f016237762ca (MD5) Previous issue date: 1971
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Petrology of the Granophyre of Isle Au Haut, Maine
Made available in DSpace on 2014-12-09T20:34:09Z (GMT). No. of bitstreams: 1 6406157.pdf: 2663414 bytes, checksum: 05880adf55cfe77efe8f5c9eb79b21bb (MD5) Previous issue date: 1963
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