Ophiolitic and other mafic-ultramafic metallogenic provinces in Alaska (west of the 141st meridian) by Jeffrey Y. Foley

Cover of: Ophiolitic and other mafic-ultramafic metallogenic provinces in Alaska (west of the 141st meridian) | Jeffrey Y. Foley

Published by U.S. Dept. of the Interior, U.S. Geological Survey, Books and Open-File Section, distributor] in [Menlo Park, CA], [Denver, Colo .

Written in English

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Subjects:

  • Ore deposits -- Alaska.,
  • Ophiolites -- Alaska.,
  • Rocks, Ultrabasic -- Alaska.

Edition Notes

Book details

Statementby Jeffrey Y. Foley.
SeriesOpen-file report -- OF 92-20-B., U.S. Geological Survey open-file report -- 92-20-B.
ContributionsGeological Survey (U.S.)
The Physical Object
FormatMicroform
Pagination55 p.
Number of Pages55
ID Numbers
Open LibraryOL17750386M

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Ophiolitic and other mafic-ultramafic metallogenic provinces in Alaska, West of the st meridian: USGS Open-File Report B [Foley, J. Y.] on *FREE* shipping on qualifying offers. Ophiolitic and other mafic-ultramafic metallogenic provinces in Alaska, West of the st meridian: USGS Open-File Report BAuthor: J.

Foley. Ophiolitic and other mafic-ultramafic metallogenic provinces in Alaska (west of the st meridian) [microform] / by Jeffrey Y. Foley U.S. Dept. of the Interior, U.S.

Geological Survey ; Books and Open-File Section, distributor] [Menlo Park, CA]: [Denver, Colo Australian/Harvard Citation. Foley, Jeffrey Y.

& Geological Survey (U.S.). Get this from a library. Ophiolitic and other mafic-ultramafic metallogenic provinces in Alaska (west of the st meridian). [Jeffrey Y Foley; Geological Survey (U.S.)].

Gulf of Alaska metallogenic province Explanation of table 1 and figure 1 Acknowledgments References. UNIT OF MEASURE ABBREVIATIONS METALLOGENY OF OPHIOLITIC AND OTHER MAFIC-ULTRAMAFIC TERRANES IN ALASKA By Jeffrey Y. Foley' ABSTRACT Ophiolitic rocks in Alaska contain a variety of metallic and nonmetallic minerals that are of.

OPHIOLITIC AND OTHER MAFIC-ULTRAMAFIC METALLOGENIC PROVINCES IN ALASKA (WEST OF THE ST MERIDIAN) By Jeffrey 1 ABSTRACT Mafic and ultramafic rocks associated with ophiolitic terranes and other petrologic suites in Alaska contain a variety of metallic and nonmetallic minerals that are of past and potentially future economic by: 2.

The Hudesheng mafic–ultramafic intrusions are located in the Oulongbuluke Block, north of the Qaidam Block in Qinghai Province, NW China. We carried out a detailed study of the intrusions, including field observations, petrology, zircon U–Pb geochronology, Lu–Hf isotopes, bulk-rock major- and trace-element geochemistry, and mineral compositions, to provide a better understanding.

The Gabal Taftafan mafic–ultramafic complex is thus distinguishable from the ophiolitic and layered igneous intrusion mafic–ultramafic complexes (online supplementary data 7). The ophiolitic mafic–ultramafic rocks are occasionally intensely deformed, where the layered gabbros are often located on top of the ultramafic cumulates (Coleman.

The Lachlan Orogen is host to four major and distinct metallogenic provinces (Fig. 1, Fig. 2).A fifth metallogenic association is superimposed on existing provinces due to periods of localised extension, which was followed by inversion and closure of short-lived rift basins to give rise to sediment-hosted but thrust-related, epigenetic mineralisation.

Metallogenic provinces of different ages were recognized, albeit with large age uncertainties. Primary depositional setting versus replacement was, and remains, an issue.

Independently, Bilibin () and Smirnov () documented specific lithotectonic and age associations for various classes of metallic deposits in the former Soviet Union.

The recognition of ophiolites, accreted oceanic plateaux, and other large igneous provinces (LIPs) in old mountain belts, and the ability to distinguish them from immature arc sequences, and layered intrusions has important implications for our understanding of the relative importance of arc magmatism versus accretion of LIPs in the growth of.

OYHlOLlTlC ANI) OTHER MAF'IC-ULTRAMAFIC METALLOGENIC PROVINCES IN AMKA (WEST OF THE ST MERIDIAN) ABSTRACT M~IC and ultramafic rocks associated with ophiolitic terranes and other petrologic suites in Alaska contain a variety of metallic and nonmetallic minerals that are of past and potentially future economic significance.

Metallic minerals that are reported, or have been. Geology and Precious Metal Potential of Mafic-Ultramafic Rocks in British Columbia: Current Progress typically at the margins of fault-bound ophiolitic blocks. Au and other elements in. In addition, metallogenic epochs have been defined for different mineral systems, that include porphyry-epithermal related to intrusive / orogenic, related to mafic-ultramafic magmatism, VMS.

The Tulaergen Ni-Cu-Co sulfide deposit is associated with a small differentiated mafic-ultramafic body (ca. Ma) in the eastern Tianshan orogenic belt, northwestern China. The mafic-ultramafic complex comprises amphibole lherzolite, amphibole olivine websterite, amphibole websterite, and amphibole gabbro.

This metallogenic belt is herein referred to as the Alexander Triassic metallogenic belt. The VMS occurrences show systematic differences in degree of structural control, chemistry, and stratigraphic setting along the Alexander Triassic metallogenic belt that suggest important spatial or temporal changes in the tectonic environment of formation.

Neoarchean mafic-ultramafic (ophiolitic) rocks are also reported from Agali Ophiolite Complex in the Bhavani Shear Zone (Santosh et al., b) located south of the Nilgiri Block, and also from.

Platinum-group elements as petrological indicators in mafic-ultramafic complexes of the central and southern Urals: preliminary results G. Garutt °a* ', G. Fershtater.

Ophiolitic and other mafic-ultramafic metallogenic provinces in Alaska Jeffrey Y. Foley Not In Library. Ophiolites and oceanic lithosphere I. Gass, S. Lippard Nicolas, A., 3 books Yildirim Dilek, 3 books S. Lippard, 2 books Stepan Stepanovich Zimin. OF B Ophiolitic and other mafic-ultramafic metallogenic provinces in Alaska (west of the st meridian) by Foley, J.Y., OF C Ophiolitic complexes of the Gulf of Alaska by Nelson, S.W., OF D Ophiolitic terrane of the western Brooks Range, Alaska.

Other reports that have been placed in open-file in this series are a geologic map of the ophiolitic terranes of Alaska (Patton and others, ), a map of the ophiolitic and other mafic-ultramafic metallogenic provinces in Alaska (Foley.

Also, the total volume of the mafic–ultramafic magmatism was small compared to Western Australia or Canada, and the small size or absence of VMS and other sulfidic deposits restricts the amount of potential sources of external sulfur (cf.

Bekker et al., ), although clear evidence for assimilation of crustal sulfur can be found, for. In addition, numerous other possibilities (Table ) must be ruled out before an ophiolitic affinity can be verified (Moores, ).

Because lithologies associated with ophiolites can occur in a variety of other geologic environments, the geologic context is an essential ingredient for sound interpretation. Unfortunately, the interpretation.

J.M. Schmidt, R.K. Rogers, "Metallogeny of the Nikolai large igneous province (LIP) in southern Alaska and its influence on the mineral potential of the Talkeetna Mountains", Tectonic Growth of a Collisional Continental Margin: Crustal Evolution of Southern Alaska, Kenneth D. Ridgway, Jeffrey M.

Trop, Jonathan M.G. Glen, J. Michael O'Neill. The Hudesheng mafic–ultramafic intrusions are located in the Oulongbuluke Block, north of the Qaidam Block in Qinghai Province, NW China. We carried out a. Over investigated gold deposits, most of which are large to superlarge, are grouped into five tectonic units which include 16 metallogenic provinces (Supplementary Table 1).The tectonic units are the Central Asian orogenic belt comprising provinces of Tianshan-Altay (1A) and Northeast China (1B), the North China Craton comprising the northern margin (2A), Jiaodong (2B), and.

They are also significant in terms of metallogenic provinces (Ma et al., ). Multiple magmatism in an evolving suprasubduction zone mantle wedge: The case of the composite mafic-ultramafic. Ophiolitic and other mafic-ultramafic metallogenic provinces in Alaska (west of the st meridian) Ophiolitic complexes of the Gulf of Alaska Ophiolitic terrane of the western Brooks Range, Alaska Ophiolitic complexes and associated rocks near the Border Ranges fault zone southcentral Alaska Ophiolitic terrane bordering the Yukon-Koyukuk basin.

Large Igneous Provinces - by Richard E. Ernst September Open Library is an open, editable library catalog, building towards a web page for every book ever published. Read, borrow, and discover more than 3M books for free. Oceanic/ophiolitic magma chambers differ from continental layered mafic-ultramafic intrusions because magmatism is synchronous with extensional tectonism in a submarine environment.

Because oceanic ridges continuously extend, new magma formed by decompression melting of the upwelling mantle constantly arrives beneath the ridge axis. You can write a book review and share your experiences. Other readers will always be interested in your opinion of the books you've read.

Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them. Importantly, Archean LIPs, such as the magmatism within the Eastern Goldfields Superterrane of the Yilgarn Craton of Western Australia (i.e.

the Eastern Yilgarn LIP), are typically associated with voluminous ultramafic komatiites, as well as often hosting significant mafic–ultramafic layered intrusions, such as the ~30, km 3 Windimurra.

Ni-Cu sulfide deposits in mafic-ultramafic orogenic intrusions - Examples from the Svecofennian areas, Finland Platinum-group elements and gold geochemistry and mineralogy in the Ray-Iz ophiolitic chromitites, Polar Urals. Kojonen, K A case study of the metallogenic province and ore-forming chronology in the northern margin of the North.

It is associated to the Beja‐Acebuches Ophiolitic Complex [Bard and Moine, ; Munha et al., ; Quesada et al., ]. This other Variscan suture constitutes the boundary between two tectonostratigraphic units: to the north, the Ossa Morena Zone and to.

[1] The Jinshajiang ophiolitic mélange zone in southwest China represents a remnant of the eastern Paleo‐Tethys Ocean. Field, geochronological and geochemical studies have identified two distinct suites of plagiogranites within the mélange, the Dongzhulin trondhjemite and Jiyidu tonalite, which represent rift and subduction settings, respectively, related to opening and closing of the ocean.

Recent U.S. Geological Survey studies in the Tintina Gold Province, Alaska, United States, and Yukon, Canada -- results of a 5 year project: U.S.

Geological Survey Scientific Investigations Report C, p. C1-C7. PIR ISBN () [Research Book Chapter] Htay, H and Zaw, K and Than Oo, T, The mafic-ultramafic (ophiolitic) rocks of Myanmar, Myanmar: Geology, Resources and Tectonics, Geological Society, AJ Barber, Z Khin, MJ Crow (ed), London, pp.

ISBN () [Research Book. The Tonsina ultramafic and mafic assemblage, located in the northern Chugach Mountains along the Trans‐Alaska Crustal Transect (TACT), is interpreted to be the remains of a magma chamber that cryst.

The matrix of an olistostrome is mainly sandstone rather than shale, as in other well‐known cases like the olistostromes in the Franciscan Complex (Aalto, ; Raymond & Bero, ), and the matrix of the Solonker ophiolitic mélanges is dominated by red mudstone and chert with radiolarian fossils (G.

Li et al., ; Shang, ). Ultramafic–mafic igneous complexes of the Precambrian East Siberian metallogenic province (southern framing of the Siberian craton): age, composition, origin, and ore potential. Russian Geology and Geophysics 54 (11): Crossref, ISI, Google Scholar.

Foley, J.Y.,Ophiolite and other ultramafic metallogenic provinces in Alaska (west of the th meridian): U.S. Geological Survey Open-File Report B, 55 p.Purchase Precambrian Ophiolites and Related Rocks, Volume 13 - 1st Edition. Print Book & E-Book.

ISBNNew paleomagnetic results from the eastern Klamath Mountains of northern California show that Neoproterozoic rocks of the Trinity ophiolitic complex and overlying Middle Devonian volcanic rocks are .

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