scholarly journals Deposional Age of the Bangnim Group, Pyeongchang, Korea Constrained by SHRIMP U-Pb Age of the Detrital Zircons

2017 ◽  
Vol 26 (1) ◽  
pp. 73-82
Author(s):  
Mu-Seong Gwak ◽  
Yong-Sun Song ◽  
Kye-Hun Park
Keyword(s):  
Detrital Zircons

Preliminary detrital zircon U-Pb Geochronology of the Wasatch Formation, Powder River Basin, Wyoming

2019 ◽  
Vol 56 (3) ◽  
pp. 247-266
Author(s):  
Ian Anderson ◽  
David H. Malone ◽  
John Craddock
Keyword(s):  
River Basin ◽  
Detrital Zircon ◽  
Middle Part ◽  
Detrital Zircons ◽  
Powder River Basin ◽  
Zircon Age ◽  
Lower Eocene ◽  
The North ◽  
Mountain Front ◽  
Fluvial Sandstone

The lower Eocene Wasatch Formation is more than 1500 m thick in the Powder River Basin of Wyoming. The Wasatch is a Laramide synorgenic deposit that consists of paludal and lacustrine mudstone, fluvial sandstone, and coal. U-Pb geochronologic data on detrital zircons were gathered for a sandstone unit in the middle part of the succession. The Wasatch was collected along Interstate 90 just west of the Powder River, which is about 50 km east of the Bighorn Mountain front. The sandstone is lenticular in geometry and consists of arkosic arenite and wacke. The detrital zircon age spectrum ranged (n=99) from 1433-2957 Ma in age, and consisted of more than 95% Archean age grains, with an age peak of about 2900 Ma. Three populations of Archean ages are evident: 2886.6±10 Ma (24%), 2906.6±8.4 Ma (56%) and 2934.1±6.6 Ma (20%; all results 2 sigma). These ages are consistent with the age of Archean rocks exposed in the northern part of the range. The sparse Proterozoic grains were likely derived from the recycling of Cambrian and Carboniferous strata. These sands were transported to the Powder River Basin through the alluvial fans adjacent to the Piney Creek thrust. Drainage continued to the north through the basin and eventually into the Ancestral Missouri River and Gulf of Mexico. The provenance of the Wasatch is distinct from coeval Tatman and Willwood strata in the Bighorn and Absaroka basins, which were derived from distal source (>500 km) areas in the Sevier Highlands of Idaho and the Laramide Beartooth and Tobacco Root uplifts. Why the Bighorn Mountains shed abundant Eocene strata only to the east and not to the west remains enigmatic, and merits further study.

U-PB ANALYSIS OF DETRITAL ZIRCONS FROM MESOZOIC STRATA IN THE NORTHERN TALKEETNA MOUNTAINS, SOUTH-CENTRAL ALASKA

2017 ◽  
Author(s):  
Mariah C. Romero ◽  
◽  
Kenneth D. Ridgway ◽  
Kenneth D. Ridgway
Keyword(s):  
Detrital Zircons ◽  
South Central ◽  
Talkeetna Mountains

LINKING ARC INITIATION TO SILICIC MELT EVOLUTION IN AN OCEANIC ARC SETTING USING DETRITAL ZIRCONS

2017 ◽  
Author(s):  
Andrew P. Barth ◽  
◽  
Kenichiro Tani ◽  
Sebastein Meffre ◽  
J.L. Wooden ◽  
...  
Keyword(s):  
Detrital Zircons ◽  
Arc Setting ◽  
Melt Evolution

DETRITAL ZIRCONS FROM QUARTZITES CONSTRAIN THE WESTERN MARGIN OF LAURENTIA IN SOUTH-WESTERNMOST IDAHO

2018 ◽  
Author(s):  
Maureen Kahn ◽  
◽  
Basil Tikoff ◽  
Ethan Parrish ◽  
Jeffrey Vervoort ◽  
...  
Keyword(s):  
Detrital Zircons ◽  
Western Margin

New constraints from zircon, monazite and uraninite dating on the commencement of sedimentation in the Cuddapah basin, India

2017 ◽  
Vol 155 (6) ◽  
pp. 1230-1246 ◽  
Author(s):  
DEBIDARSANI SAHOO ◽  
KAMAL LOCHAN PRUSETH ◽  
DEWASHISH UPADHYAY ◽  
SAMEER RANJAN ◽  
DIPAK C. PAL ◽  
...  
Keyword(s):  
Wide Spectrum ◽  
Hydrothermal Activity ◽  
Time Span ◽  
Detrital Zircons ◽  
Cuddapah Basin ◽  
Relative Timing ◽  
Considerable Time ◽  
Long Span ◽  
Considerable Confusion ◽  
Age Constraints

AbstractThe Cuddapah basin in southern India, consisting of the Palnad, Srisailam, Kurnool and Papaghni sub-basins, contains unmetamorphosed and undeformed sediments deposited during a long span of time in the Proterozoic. In the absence of robust age constraints, there is considerable confusion regarding the relative timing of sedimentation in these sub-basins. In this study, U–Pb isotopic dating of zircon and U–Th–Pbtotaldating of monazite and uraninite from the gritty quartzite that supposedly belongs to the formation Banganapalle Quartzite have been used to constrain the beginning of sedimentation in the Palnad sub-basin. Magmatic and detrital zircons recording an age of 2.53 Ga indicate that the sediments were derived from the granitic basement or similar sources and were deposited after 2.53 Ga. Hydrothermally altered zircons both in the basement and the cover provide concordant ages of 2.32 and 2.12 Ga and date two major hydrothermal events. Thus, the gritty quartzite must have been deposited sometime between 2.53 and 2.12 Ga and represents the earliest sediments in the Cuddapah basin. Monazite and uraninite give a wide spectrum of ages between 2.5 Ga and 150 Ma, which indicates several pulses of hydrothermal activity over a considerable time span, both in the basement granite and the overlying quartzite. The new age constraints suggest that the gritty quartzite may be stratigraphically equivalent to the Gulcheru Quartzite that is the oldest unit in the Cuddapah basin, and that a sedimentary/erosional hiatus exists above it.

Closure of the Paleotethys in the External Hellenides: Constraints from U–Pb ages of magmatic and detrital zircons (Crete)

2015 ◽  
Vol 28 (2) ◽  
pp. 642-667 ◽  
Author(s):  
G. Zulauf ◽  
W. Dörr ◽  
S.C. Fisher-Spurlock ◽  
A. Gerdes ◽  
V. Chatzaras ◽  
...  
Keyword(s):  
Detrital Zircons
Sign in / Sign up

Export Citation Format

Share Document