Your letter grade in this class is independent of the performance of your peers. In general, porphyry deposits are characterized by low grades of ore mineralization, a porphyritic intrusive complex that is surrounded by a vein stockwork. Information about the openaccess article magmatichydrothermal fluid evolution of the dalli porphyry cuau deposit. Within a period of 100 years, a significant body of knowledge has emerged and economic geology has become an established university discipline. These materials include precious and base metals, nonmetallic minerals, constructiongrade stone, petroleum, natural gas, coal, and water. Magmatichydrothermal fluid evolution of the dalli porphyry. Photos by erich and carlos pdf, 150 mb dune field northeast of majes. Economic geology is the study of the formation and extraction of earth materials that have some economic potential in. These are large scale magmatichydrothermal systems associated with a series of porphyritic intrusions, which result in extensive alteration footprints that we map and model to target high grade coppergold mineralization.
Generalized geologic maps and vertical profiles through several porphyry. Department of geology, lakehead university, 955 oliver road, thunder bay, ontario, canada p7b 5e1. Richar sillitoe publications andes economic geology. Annesylvie andremayer professor in economic geology. This manuscript, prepared for publication in economic geology, has been submitted in partial fulfillment of requirements for the master of science degree at the university of arizona and is deposited in the antevs reading room to be made available to borrowers, as are copies of. Printed in the october 2010 no 83 issue of the seg newsletter. Pohl, to any students, professional geologists and others in the related industries, and anyone interested in mineral ores, and in the environmental aspects of economic geology. Hydrothermal alteration is defined as any alteration of rocks or minerals by the reaction of hydrothermal fluid with preexisting solid phases. Why no porphyry copper deposits in japan and south korea. Richard sillitoegraduated from the university of london, england, where he went. Sericitic and advanced argillic mineral assemblages and. Economic geology, scientific discipline concerned with the distribution of mineral deposits, the economic considerations involved in their recovery, and an assessment of the reserves available. A rock altered by hot, chemicallyactive fluids geology. Geology and economics of strategic and critical minerals.
Richar sillitoe publications free download as pdf file. To help us answer these questions, we turn to the field of economic geology. Porphyry cu systems host some of the most widely distributed mineralization types at convergent plate boundaries, including porphyry deposits centered on intrusions. Gold resources copper resources a geological cross section through the batu hijau porphyry deposit, indonesia 920 million tons of ore grading 0. Six molybdenite specimens from the orebearing quartz veins were dated using reos isotopes.
Economic geology is a subdiscipline of the geosciences. See sillitoe, 2010, porphyry systems economicgeology, the. Porphyry copper deposit model, chapter b of mineral deposit. The large size and high grade of the grasberg deposit raised the profile of goldrich porphyry deposits and led to their becoming prime explomtion targets for companies in. See sillitoe, 2010, porphyry systems economicgeology. Economic geology is concerned with earth materials that can be used for economic andor industrial purposes.
Geology and mineral resources, 1990 lie in the western parts of the hongshan district. The field of economic geology is a specialized aspect of geology, concerning the identification and provenance of natural mineral deposits which are of economic interest to society. The formation of porphyry copper deposits institute of geochemistry. Many countries, like canada, now require a degree to become a profession al geoscientist, and links between economic geology and other geoscience disciplines continue to be forged around the world. Scribd is the worlds largest social reading and publishing site. Porphyry deposits represent an important resource of copper. View test prep 2010porphyrysillitoe from geology 1 at university of texas. Supergene enrichment how natural processes have transformed. Hydrothermal alteration can be isochemical, like metamorphism, and dominated by mineralogical changes, or it can. Supergene enrichment how natural processes have transformed lowgrade copper mineralization into economic ores by david f. Volume 114 issue 3 economic geology geoscienceworld.
Sillitoe and others 2016 summarized the current discovery climate. Representative sections at 5,000n, in the southern part of the josemaraa coppergold deposit where it is concealed beneath postmineral rocks. Sepm society for sedimentary geology short course manual, v. Geol 463 economic geology 2 if the campus is closed for any reason during a scheduled activity, the material of that day will be made up by rescheduling, or by special assignment. This manuscript, prepared for publication in economic geology, has been submitted in partial fulfillment of requirements for the master of science degree at the university of arizona and is deposited in the antevs reading room to be made available to borrowers, as are copies of regular theses and dissertations. The geology and ore deposits of this region are described in the paper by sillitoe et al.
Hedenquist jw, harris m, camus f eds geology and genesis of major copper deposits and districts of the world. In 1979, the cu and aumineralized 128 porphyry fragments in outcrop over the eastern end of the lepanto orebody were recognized as 129 being hosted by a diatreme breccia, i. Special needs i will make every possible effort to accommodate your request for special accommodations, when justified. See sillitoe, 2010, porphyry systems economic geology, the best overview of porphyry deposits also his 2005 paper in the economic geology 100th. Economic geology spring 2010 friehauf syllabus 3 because this course is an opportunity for you to develop your own understanding of geology, rather than an intellectual competition between you and your peers, there will be no curving of grades. Importance, geology, mining, processing of strategic and critical minerals what is involved from exploration thru production thru marketing reports, field notes, presentations where to look for information research needed sustainable development we can mine within public concerns social license to operate. The chemical characteristics of the ordovician rock s of kentucky. The potential of goldrich porphyry deposits is underscored by the fact that. Some buried molybdenite bearing, layered or lenticular graniteporphyry bodies also are present in deeper areas in the central part of the district. Table of contents pdf society of economic geologists.
Printed in the october 2010 no 83 issue of the seg newsletter 2010 the society of economic. Geology of the josemaria porphyry coppergold deposit, argentina. Porphyry copper systems are mainly developed at convergent plate margins, including continental margin and islandarc settings sillitoe, 2010, where the subduction of oceanic crust is related to. Distribution at cerro yanacocha highsulfidation epithermal deposit, northern peru by richard pilco a prepublication manuscript submitted to the faculty of the department of geosciences in partial fulfillment of the requirements for the degree of professional science masters in economic geology in the graduate college the university of arizona. View test prep 2010 porphyry sillitoe from geology 1 at university of texas. Generalized porphyry copper model lithocap development. Economic geology kutztown university of pennsylvania. Porphyry copper systems1 economic geology geoscienceworld.
The journal was first published in 1905 by the economic geology publishing company pubco, a notforprofit company established for the purpose of publishing a periodical devoted to economic geology. I highly recommend the landmark text book economic geology. Porphyry systems and ore deposits february, 2016 researchgate. Lucian p farmer for the degree of master of science in geology presented on november 29, 2012. Society of economic geologists, sp pub 16, littleton, pp 487514. Porphyry coppergold deposits form in a variety of volcanic environments, most commonly in continental margins and intraoceanic arcs. Sillitoe, economic geology, volume 105, pages 341, 2010. Volume 105 issue 1 economic geology geoscienceworld. Sericitic and advanced argillic mineral assemblages and their.
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