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MINSHEW, Jr., Velon Haywood, 1939- GEOLOGY OF THE SCOTT GLACIER AND WISCONSIN RANGE AREAS, CENTRAL TRANSANTARCTIC MOUNTAINS, ANTARCTICA.
The Ohio State University, Ph.D., 1967 Geology
University Microfilms, Inc., Ann Arbor, Michigan
GEOLOGY OF THE SCOTT GLACIER AND WISCONSIN RANGE AREAS,
CENTRAL TRANSANTARCTIC MOUNTAINS, ANTARCTICA
DISSERTATION
Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate
School of The Ohio State University
by
Velon Haywood Minshew, Jr. B.S., M.S,
The Ohio State University
1967
Approved by
-Adviser
Department of Geology
ACKNOWLEDGMENTS
This report covers two field seasons in the central Transantarctic Mountains, During this time, the Mt, Weaver field party consisted of: George Doumani, leader and paleontologist; Larry Lackey, field assistant; Courtney Skinner, field assistant. The Wisconsin Range party was composed of: Gunter Faure, leader and geochronologist; John Mercer, glacial geologist; John Murtaugh, igneous petrclogist; James Teller, field assistant; Courtney Skinner, field assistant; Harry Gair, visiting s t r a ti - grapher. The author served as a stratigrapher with both expeditions .
Various members of the sta ff of the Department of Geology,
The Ohio State University, as well as some specialists from the outside were consulted in the laboratory studies for the preparation of this report. Dr. George E. Moore supervised the petrographic work and c ritic a lly reviewed the manuscript. Dr. J. M. Schopf examined the coal and plant fossils, and provided information concerning their age and environmental significance. Drs. Richard P. Goldthwait and Colin B. B. Bull spent time with the author discussing the late Paleozoic glacial deposits, and reviewed portions of the manuscript. Dr. Arthur Mirsky was helpful in numerous ways during the course of the research and in editing the report. Dr. Gunter Faure generously supplied
ii
unpublished data on the geochronology and chemistry of the basement rocks, and reviewed the manuscript. Dr. C. H. Schultz examined thin sections of the Permian pyroclastic rocks. Dr. Sambhudas Chaudhuri, Kansas State University, assisted in the X-ray diffraction analyses. Dr. Allison R. Palmer identified the trilo b ite s from the Leverett Formation, and Dr. Norman E. Newell examined pelecypod casts from the Weaver Formation. Drs. R. L. Bates, A. LaRocque, E. Rudolph reviewed the manuscript and offered many helpful suggestions.
Dr. C. H. Summerson, Department of Geology, The Ohio State
University, supervised the research, and spent one month in the field examining the stratigraphic sections of the Mt. Weaver area; the author is grateful to Professor Summerson for his continuous encouragement and assistance. The final order of this report is due in large part to his constructive criticism, although the author takes the responsibility for a ll opinions expressed.
The author is also indebted to his associates of the
Institute of Polar Studies for their many stimulating discussions and criticism s. P. J. Barrett, R. L. Cameron, D. E. E llio tt, K. R. Everett, J. L. Lindsay, and J. H. Mercer were especially helpful. As a result of our many discussions, i t is d iffic u lt to determine who f i r s t suggested some ideas.
i i i
Logistic support to the field was provided by the U. S. Navy,
Air Development Squadron Six. U. S. Array UH-1B turbine h e licopters of the Uo S. Army Aviation Detachment, Antarctic Support, were placed at the disposal of the field party both seasons. Without the assistance of these helicopters, the regional survey would not have been possible.
The author was assisted in the typing of the manuscript by
Miss Adda Jane L iggitt. Miss Pamela Minshew colored the geologic map.
This research was supported by National Science Foundations grants G-22542 and Ga-136, awarded to The Ohio State University Research Foundation, and administered by the In stitute of Polar Studies.
iv
VITA
January 11, 1939 1958-1959
Born, Carthage, Mississippi Laboratory Assistant, Department of Geology University of Southern Mississippi
B. Sc,, University of Southern Mississippi
1959
Teaching Assistant, Department of Geology University of Nebraska
1959-1962
M. Sc., University of Nebraska
1962
Research Associate, In stitu te of Polar Studies The Ohio State University
1962-present
Stratigrapher, Mt, Weaver Geologic Expedition
1962-1963 1964-1965
Antarctica Stratigrapher, Wisconsin Range Geologic Expedition Antarctica
v
PUBLICATIONS
Stratigraphy and sedimentation of the Meridian Sand in east central Mississippi, M. Sc, Thesis, University of Nebraska, 1962; abstract published in 1962 proceedings of the Nebraska Academy of Sciences.
Geology of Earth*s southernmost outcrops, (Abstract), with G. A. Doumani, Geol. Soc. Amer. Spec. Paper No. 76, p. 50-51, 1964.
Stratigraphic section of the Robert Scott Glacier area, Queen Maud Range, Antarctica, (Abstract), with C. H. Summerson, Geol. Soc. Amer. Spec. Paper No. 76, p. 312-313, 1964.
General geology of the Mount Weaver area, Queen Maud Mountains, Antarctica, with G. A. Doumani, in Hadley, J. B., Ed., Geology and Paleontology of the Antarctic, V. 6, Antarctic Research Series, Amer. Geophys. Un., p. 71-116, 1965.
Potassium-Argon age from a granite at Mount Wilbur, Queen Maud Range, Antarctica, Science, 150 (3697), p. 741-743, 1965.
Stratigraphy of the Wisconsin Range, Horlick Mountains, Antarctica, Science, 152 (3722), p. 637-639, 1966.
Petrologic investigations of the Scott Glacier-Wisconsin Range, Antarctica, Antarctic Journal of the U. S., in press.
Late Paleozoic glacial stratigraphy, central Transantarctic Mountains, Antarctica, First International Symposium on Gondwana stratigraphy and paleontology, Buenos Aires, in press.
Permo-Carboniferous stratigraphy, central Transantarctic Mountains, Antarctica, with C. H. Summerson, Sixth International Congress of Carboniferous stratigraphy and geology, in press.
Thermal metamorphism of the Beacon Rocks, central Transantarctic Mountains, Antarctica, (A!> vact), for presentation of 1967 Geol. Soc. Amer. Annual Meeting, New Orleans.
vi
FIELDS OF STUDY
- Geology
- Major Field:
Studies in Stratigraphy. Professor Charles H. Summerson Studies in Sedimentation. Professor Charles H. Summerson Studies in Petrology, Professor George E. Moore Studies in Glacial Geology. Professor Richard P. Goldthwait Studies in Coal Geology. Professor J. M. Schopf
v ii
TABLE OF CONTENTS
page
- PREFACE . . .
- .
- i i
xv
LIST OF TABLES......................................................................
LIST OF ILLUSTRATIONS..........................................................
INTRODUCTION......................................................... . . . . .
AREA OF INVESTIGATION..........................................................
xvii
16
- 7
- FIELD WORK
............................
PREVIOUS INVESTIGATIONS......................................................
GEOMORPHOLOGY...........................................................................
WEATHERING CHARACTERISTICS..............................................
STRUCTURAL GEOLOGY..............................................................
Historical background. . . . . . .......................... Scott Glacier and Wisconsin Range . . . . . .
8
10 13 20 20 22 26 26 28 28 30 34 34 34 36
STRATIGRAPHY .
Introduction .........................................
Basement s t r a t i g r a p h y ....................
..................................................................
Introduction
..............................................................
Granitic rocks . . ......................... . . . . . . . LaGorce Formation . . . . . . . . . . . . . .
Definition and type a r e a ............................. Areal Distribution Thickness
....................
........................
v iii page
- 36
- Structure
P e tro lo g y ..............................................................
Primary s t r u c t u r e s ................. .................... Intrusive contacts . . . . . ..................... Paleontology . . . . . . . . .
.............................................= . . .
37
- .
- 38
38 38 39 39 41 41 41 41 42 42 43 43 48 49 50 51 52 52 52 54
Environment of deposition .............................
A g e .................................................
Wyatt Formation . . . . . . . . . .....................
- Introduction
- .
..............................................
Definition and type a r e a ........................ ..
Areal d i s t r i b u t i o n ..........................................
Lower c o n t a c t ........................
.
- S t r u c tu r e
- .
- Thickness
- . . . . .
P e tro lo g y .....................................
Chemical composition ......................................
Metarnorphism
......................................
O r i g i n ....................
A g e ...........................................................................
Leverett Formation ......................................................
Definition and type a r e a ............................ Areal distribution
.............................
T hick n ess..............................................................
ix page
Structure
.............................................................
54
S t r a t i g r a p h y ..........................................
54
Chemistry.................................................................
Primary structures .............................................
Paleontology and age. . . . . . . . .
60 61
61
Environment of deposition ................................
63
- 64
- Metamorphism
.....................................................
- . . .
- Basement correlations
- 65
71 74 79
Isolated exposures of basement rocks . . . . Basement tectonics Beacon rocks
. . . . .
. . . . . . .
- Introduction
- .
.................................................
79
Buckeye Formation . . . . . . . . . . .
Introduction . . . . . .....................................
Definition and type a r e a ................................
Areal d i s t r i b u t i o n .............................................
86
86 86 87
- 89
- Lower contact
.............................................
Thickness . . . . . . .................. . . . .
91
L ith o log y .................................................................
91
T illite
....................
.........................................
97
104 105
Chemistry
O r i g i n ..............................................................
- Environments of deposition ............................
- 107
- Paleontology
- . . . . . . .
- Il l
xpage
A g e ..................... . . .
.............................
112 112 118 118 120 121 122 123 124 126 128 128 130 180 131 131 133 137 139 140 142 143
Directions of ice movement . . . . . .
Scott Glacier Formation . . . . . . . . .
Definition and type area . . . . . . . Areal distribution . . . . . . . . . . Lower c o n t a c t ........................
.
Thickness . . . . . . . . . . . . . . .
Lithology..............................
Primary sedimentary structures . . . . Petrology .
................................
Chemistry . . . . . . . . . . . . . . . Environment of deposition . . . . . . . Direction of ice movement .
.................
Age .........................................
Resume of the Antarctic glacial deposits . .
Introduction ............................. . . . . .
Ohio Range . . . . . . . . ..................... Nilsen Plateau
................................
Western Queen Maud Mountains ................. Queen Alexandra Range . . . . . . . . . Darwin Glacier area . . . . . . . . . . Pensacola Mountains . . . . . . . . . .
xi page
144
Ellsworth Mountains ................................. . . .
Victoria L an d ..........................................................
Regional analysis of ice movement
145 directions
..................... . . . . . . . . .
145 148 150 150 152 152 152 154 154 157 158 159 160 160 160 160 162 162 167 168 171
Mountain vs. continental glaciation . . . .
- Weaver Formation
- . . . . . . . . .
I n t r o d u c t i o n .................................................
Lower m em b er.........................................................
Areal distribution
...........................
Lower c o n t a c t .........................................................
T hickness..................................................................
L ith o lo g y ..................................................................
Chemistry
......................................................
Primary sedimentary structures ..................... Paleontology . . . . . . . . . . ................. Middle member . . . ..................... . . . . . . Introduction . . . . . . . . . . . . . . . Areal distribution . . . . . . . . . . . . Lower contact Thickness . . . . . . ..................... . . . . . Lithology . . . . . . . . . ......................... Primary sedimentary structures . . . . . . Regional stratigraphy . . . . . . . . . .
....................
Dpper member
....................................................
x ii page
171
Areal d i s t r i b u t i o n .................................................
- Lower c o n t a c t .......................... . . . . . .
- .
- 171
173 173
T h i c k n e s s ..................... . . . . . . . . . . .
Lithology . . . . . . .........................................
Chemistry ................................. . . . . . . . .
Primary sedimentary structures . . . . . . . Paleontology ..................... . . . . . . . . . .
Regional distribution of the Weaver Formation . . Environment of deposition . . . . . . . . . . . . Paleoslope of the Weaver Formation .........................
177 179 180 182 189 194 199 200 200 200 201 201 204 204 210 216 222 225 227 229
Age of the Weaver Formation .
.................................
Queen Maud F o r m a tio n ....................
Introduction . . . . . . . . . . ..................... Definition and type area Areal distribution
.
.........................
.............................
Lower contact . . . . . . . . .........................
- Thickness ..........................................................
- .
S tra tig ra p h y ........................
Petrology . . . . . . . . . . . . . . . . . Geochemistry
............................
Primary sedimentary structures ................. . . Cyclic patterns of deposition ......................... Origin
........................
Paleontology . . . . . . . . . . . . . . . .
x iii page
Regional correlations .........................................
P a l e o s l o p e ......................... .. ...........................
231 234 236 237 239 243 245 248 253 255' 256 257 259 262
- Age
- . . . . . . . . . . . . . . . . . . .
Provenance of the Beacon r o c k s ..................... . . . Metamorphism of the Beacon rocks . . . „ . . . .
- Temperature of metamnrphism „ . . . . . .
- .
DIABASE INTRUSIVES..................................................................
CENOZOIC VOLCANIC HOCKS CENOZOIC GLACIAL DEPOSITS
Ice-cored moraines
.............................
. . . . .
..............................................................
- . . . . . .
- Stranded moraines . .
A g e ......................................................................................
GEOLOGIC HISTORY OF THE POST-BASEMENT HOCKS .................
REFERENCES.................................................................
xiv
LIST OF TABLES
'Junr
Chemical compositions of weathered and unweathered sample of claystone . . . . . .
1
K-Ar data on a dated granitic rock from Mt. W e a v e r .............................................
2
- 3
- Mineralogy of the Wyatt Formation in the
Scott Glacier area
............................
.
Chemical composition of a rhyodacite of the
Wyatt Formation .........................................
4
Chemical composition of a rhyolite from the Leverett Formation . . . . .............................
5
Mineralogy of glacio-lacustrine sediments
of the Buckeye Formation .................................
6
Pebble count data from the Buckeye Formation,
T illite Spur .........................................................
7
Pebble count data from the Buckeye Formation,
Long Hills .............................................................
8
Mineralogy of t i l l i t e of the Buckeye
9
Formation
.....................
Chemical composition of a t i l l i t e of the
Buckeye Formation ................................. . . . .
10
11
12
13 14
Recognition c rite ria of Antarctic glacial deposits . . . . . . . ..................... . . . .
Pebble count data from the Scott Glacier
Formation..................................................... ....
Chemical composition of a t i l l i t e of the Scott Glacier Formation ................. . . . . .
Chemical composition of a laumontite cemented sandstone of the lower member of the Weaver Formation . . . . . . . ................. . . . . .
xv
- Number
- page
166 176 178 212 219 251
- 15
- Mineralogy of samples of the middle member
of the Weaver Formation ................. . . . . .
16
17 18 19 20
Mineralogy of samples of the upper member of the Weaver Formation.............................
Chemical composition of samples of the upper member of the Weaver Formation . . .
Mineralogy of samples of the Queen Maud Formation
........................................
Chemical composition of samples of the Queen Maud Format ion
........................
Chemical composition and mode of a basalt from Mt. Early
........................
xvi
LIST OF ILLUSTRATIONS
- Figure
- page
12
Index map of the Antarctic . . . . . . . . . . Geologic map of the central Transantarctic
3in
- Mountains .
- . . . . . . . . . . .
3456
- Index map of the Scott Glacier area . . . . .
- 4
- 5
- Index map of the Wisconsin Range area
Polygonal weathering on coal
. . . .