Petrology of the ultramafic and gabbroic rocks of the Brady Glacier nickel-copper deposit, Fairweather Range, southeastern Alaska:
Gespeichert in:
| Hauptverfasser: | , |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
Washington, DC
U.S. Government Print. Office
1981
|
| Schriftenreihe: | Geological Survey professional paper
1195 |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | Literaturverz. S. 24 - 26 |
| Beschreibung: | IV, 26 S. graph. Darst., Kt. |
Internformat
MARC
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| 100 | 1 | |a Himmelberg, Glen R. |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Petrology of the ultramafic and gabbroic rocks of the Brady Glacier nickel-copper deposit, Fairweather Range, southeastern Alaska |c by Glen R. Himmelberg and Robert A. Loney |
| 264 | 1 | |a Washington, DC |b U.S. Government Print. Office |c 1981 | |
| 300 | |a IV, 26 S. |b graph. Darst., Kt. | ||
| 336 | |b txt |2 rdacontent | ||
| 337 | |b n |2 rdamedia | ||
| 338 | |b nc |2 rdacarrier | ||
| 490 | 1 | |a Geological Survey professional paper |v 1195 | |
| 500 | |a Literaturverz. S. 24 - 26 | ||
| 700 | 1 | |a Loney, Robert A. |e Verfasser |4 aut | |
| 810 | 2 | |a United States Geological Survey |t US Geological Survey professional paper |v 1195 |w (DE-604)BV000005472 |9 1195 | |
| 856 | 4 | 2 | |m HEBIS Datenaustausch |q application/pdf |u http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=027393584&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |3 Inhaltsverzeichnis |
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Datensatz im Suchindex
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| adam_text | Petrology of the
Ultramafic and Gabbroic Rocks of the
Brady Glacier Nickel-Copper Deposit,
Fairweather Range, Southeastern Alaska
By GLEN R HIMMELBERG and ROBERT A LONEY
GEOLOGICALSURVEYPROFESSIONALPAPER1195
UNITEDSTATESGOVIRNMENTPRINTINGOJFICE,VVASHINGTON:1981
•V -i /•—*, ! ft r
CONTENTS
Page
Abstract 1
Introduction 1
Acknowledgments 1
Extent of the Brady Glacier nickel-copper deposit 1
General description of the La Perouse layered gabbro 4
Rock succession and petrography of the Brady Glacier
cumulates 5
Occurrence and mineralogy of sulfide minerals 9
Rock chemistry 9
Page
Chemistry of cumulus minerals 10
Olivine 10
Pyroxene 12
Plagioclase 12
Chromite 14
Crystallization of the Brady Glacier cumulates 17
Metamorphic country rocks 22
Summary 23
References cited 24
ILLUSTRATIONS
Page
F IGURE 1 Index map showing location of major gabbro bodies in the Fairweather Range, Alaska 2
2 Map of La Perouse layered gabbro and surrounding country rocks showing location of Brady Glacier cumulates- 3
3 Map of the Brady Glacier cumulate area showing location of nunataks, drill holes, and cross sections 4
4-6 Generalized cross sections through the Brady Glacier cumulates:
4 Southwest-northeast cross section 6
5 Northwest-southeast cross section 7
6 North-south cross section 8
7-10 Core sections showing stratigraphic distribution and chemical composition of cumulus minerals, Brady Glacier
cumulates:
7 Core NUC-5 9
8 Core NUC-2 11
9 Core NUC-7 11
10 Core NUC-10 12
11-16 Graphs showing:
11 MgO variation of Brady Glacier cumulate rock samples 13
12 Variation of olivine composition in the olivine cumulate in the lower part
of core NUC-5 - 15
13 Composition profiles across plagioclase grains 16
14 Variation of the cation ratios Mg to (Mg+Fe 2) and Cr to(Cr-t-Al) chromite in the Brady Glacier cumulates 18
15 Variation in MnO content of chromite in the Brady Glacier cumulates 18
16 Variation of Ti02 content of chromite in the Brady Glacier cumulates 19
TABLES
Page
T ABLE 1 - Chemical composition of Brady Glacier cumulate samples 1 0
2-6 Chemical composition and structural formulas of cumulus phases, Brady Glacier cumulates:
2 Olivine 14
3 Bronzite 18
4 Augite 19
5 Plagioclase =• 20
6 Chromite 21
in
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| indexdate | 2024-07-10T01:09:01Z |
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| language | English |
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| physical | IV, 26 S. graph. Darst., Kt. |
| publishDate | 1981 |
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| publisher | U.S. Government Print. Office |
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| series2 | Geological Survey professional paper |
| spelling | Himmelberg, Glen R. Verfasser aut Petrology of the ultramafic and gabbroic rocks of the Brady Glacier nickel-copper deposit, Fairweather Range, southeastern Alaska by Glen R. Himmelberg and Robert A. Loney Washington, DC U.S. Government Print. Office 1981 IV, 26 S. graph. Darst., Kt. txt rdacontent n rdamedia nc rdacarrier Geological Survey professional paper 1195 Literaturverz. S. 24 - 26 Loney, Robert A. Verfasser aut United States Geological Survey US Geological Survey professional paper 1195 (DE-604)BV000005472 1195 HEBIS Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=027393584&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Himmelberg, Glen R. Loney, Robert A. Petrology of the ultramafic and gabbroic rocks of the Brady Glacier nickel-copper deposit, Fairweather Range, southeastern Alaska |
| title | Petrology of the ultramafic and gabbroic rocks of the Brady Glacier nickel-copper deposit, Fairweather Range, southeastern Alaska |
| title_auth | Petrology of the ultramafic and gabbroic rocks of the Brady Glacier nickel-copper deposit, Fairweather Range, southeastern Alaska |
| title_exact_search | Petrology of the ultramafic and gabbroic rocks of the Brady Glacier nickel-copper deposit, Fairweather Range, southeastern Alaska |
| title_full | Petrology of the ultramafic and gabbroic rocks of the Brady Glacier nickel-copper deposit, Fairweather Range, southeastern Alaska by Glen R. Himmelberg and Robert A. Loney |
| title_fullStr | Petrology of the ultramafic and gabbroic rocks of the Brady Glacier nickel-copper deposit, Fairweather Range, southeastern Alaska by Glen R. Himmelberg and Robert A. Loney |
| title_full_unstemmed | Petrology of the ultramafic and gabbroic rocks of the Brady Glacier nickel-copper deposit, Fairweather Range, southeastern Alaska by Glen R. Himmelberg and Robert A. Loney |
| title_short | Petrology of the ultramafic and gabbroic rocks of the Brady Glacier nickel-copper deposit, Fairweather Range, southeastern Alaska |
| title_sort | petrology of the ultramafic and gabbroic rocks of the brady glacier nickel copper deposit fairweather range southeastern alaska |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=027393584&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV000005472 |
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