Early Proterozoic ophiolite, central Arizona
Journal Article
·
· Geology; (USA)
- Washington Univ., St. Louis, MO (USA)
The 1.73 Ga Payson ophiolite is a pseudostratigraphic sequence of mafic plutons, dike swarms, sheeted dikes, and submarine basalts that intruded and erupted upon a 1.75-1.76 Ga magmatic-arc complex. The composition of the sheeted dikes is tholeiitic basalt (minor andesite) with island-arc affinities. The submarine basalts are overlain by dacitic breccias and a thick section of turbidites with ca. 1.72 Ga ash beds. The entire sequence was deformed, intruded by ca. 1.70 Ga granites, and unconformably overlain by fluvial to shallow-shelf sediments. Although most of the 1.8-1.6 Ga juvenile crust of Arizona consists of magmatic-arc rocks, the Payson ophiolite is unique and is interpreted to have formed the floor of an intra-arc basin. The ophiolite developed in situ on the older arc basement, as opposed to being thrust over it. The basin was accreted to the continent by ca. 1.70 Ga.
- OSTI ID:
- 5667528
- Journal Information:
- Geology; (USA), Journal Name: Geology; (USA) Vol. 19:6; ISSN GLGYB; ISSN 0091-7613
- Country of Publication:
- United States
- Language:
- English
Similar Records
Tectonic setting of the 1. 73 Ga Payson ophiolite
Preston Peak ophiolite, Klamath mountains, California, an immature island arc: petrochemical evidence
Highly extended oceanic lithosphere: The basement and wallrocks for the Late Jurassic Rogue-Chetco oceanic arc, Oregon Klamath Mountains
Conference
·
Wed Mar 31 23:00:00 EST 1993
· Geological Society of America, Abstracts with Programs; (United States)
·
OSTI ID:5421032
Preston Peak ophiolite, Klamath mountains, California, an immature island arc: petrochemical evidence
Book
·
Fri Dec 31 23:00:00 EST 1976
·
OSTI ID:6378899
Highly extended oceanic lithosphere: The basement and wallrocks for the Late Jurassic Rogue-Chetco oceanic arc, Oregon Klamath Mountains
Conference
·
Wed Mar 31 23:00:00 EST 1993
· Geological Society of America, Abstracts with Programs; (United States)
·
OSTI ID:5127822
Related Subjects
58 GEOSCIENCES
580000* -- Geosciences
AGE ESTIMATION
ARIZONA
BASALT
BASEMENT ROCK
CHEMISTRY
CONTINENTAL CRUST
CONTINENTAL MARGIN
CONTINENTAL SHELF
DEVELOPED COUNTRIES
DIKES
DIORITES
EARTH CRUST
FEDERAL REGION IX
GABBROS
GEOCHEMISTRY
GEOLOGIC AGES
GEOLOGIC HISTORY
GEOLOGIC MODELS
GEOLOGIC STRUCTURES
GEOLOGY
IGNEOUS ROCKS
NORTH AMERICA
ORIGIN
PLUTONIC ROCKS
PRECAMBRIAN ERA
ROCKS
SEDIMENTS
STRATIGRAPHY
USA
VOLCANIC REGIONS
VOLCANIC ROCKS
580000* -- Geosciences
AGE ESTIMATION
ARIZONA
BASALT
BASEMENT ROCK
CHEMISTRY
CONTINENTAL CRUST
CONTINENTAL MARGIN
CONTINENTAL SHELF
DEVELOPED COUNTRIES
DIKES
DIORITES
EARTH CRUST
FEDERAL REGION IX
GABBROS
GEOCHEMISTRY
GEOLOGIC AGES
GEOLOGIC HISTORY
GEOLOGIC MODELS
GEOLOGIC STRUCTURES
GEOLOGY
IGNEOUS ROCKS
NORTH AMERICA
ORIGIN
PLUTONIC ROCKS
PRECAMBRIAN ERA
ROCKS
SEDIMENTS
STRATIGRAPHY
USA
VOLCANIC REGIONS
VOLCANIC ROCKS