Detrital zircon U-Pb geochronology of early Cretaceous sedimentary rocks in Dingzi Bay and Taolin area from the Sulu Orogen: Provenances and tectonic implications

2018 ◽  
Vol 54 (4) ◽  
pp. 2693-2715 ◽  
Author(s):  
Feifei Liu ◽  
Yaoqi Zhou ◽  
Zhenkai Zhang ◽  
Baojing Yue
Keyword(s):  
Early Cretaceous ◽  
Detrital Zircon ◽  
Sedimentary Rocks ◽  
Tectonic Implications

Detrital zircon U–Pb and Hf isotopic data for meta-sedimentary rocks from the Heilongjiang Complex, northeastern China and tectonic implications

Lithos ◽  
2017 ◽  
Vol 282-283 ◽  
pp. 23-32 ◽  
Author(s):  
Chloe Yanlin Zhu ◽  
Guochun Zhao ◽  
Min Sun ◽  
Yigui Han ◽  
Qian Liu ◽  
...  
Keyword(s):  
Detrital Zircon ◽  
Sedimentary Rocks ◽  
Northeastern China ◽  
Isotopic Data ◽  
Tectonic Implications

Provenance of Jurassic sedimentary rocks of south-central Quesnellia, British Columbia: implications for paleogeography

2004 ◽  
Vol 41 (1) ◽  
pp. 103-125 ◽  
Author(s):  
Nathan T Petersen ◽  
Paul L Smith ◽  
James K Mortensen ◽  
Robert A Creaser ◽  
Howard W Tipper
Keyword(s):  
Detrital Zircon ◽  
Middle Jurassic ◽  
Sedimentary Rocks ◽  
Source Area ◽  
Lower Jurassic ◽  
Early Jurassic ◽  
Late Triassic ◽  
Nd Isotopes ◽  
South Central ◽  
History Of

Jurassic sedimentary rocks of southern to central Quesnellia record the history of the Quesnellian magmatic arc and reflect increasing continental influence throughout the Jurassic history of the terrane. Standard petrographic point counts, geochemistry, Sm–Nd isotopes and detrital zircon geochronology, were employed to study provenance of rocks obtained from three areas of the terrane. Lower Jurassic sedimentary rocks, classified by inferred proximity to their source areas as proximal or proximal basin are derived from an arc source area. Sandstones of this age are immature. The rocks are geochemically and isotopically primitive. Detrital zircon populations, based on a limited number of analyses, have homogeneous Late Triassic or Early Jurassic ages, reflecting local derivation from Quesnellian arc sources. Middle Jurassic proximal and proximal basin sedimentary rocks show a trend toward more evolved mature sediments and evolved geochemical characteristics. The sandstones show a change to more mature grain components when compared with Lower Jurassic sedimentary rocks. There is a decrease in εNdT values of the sedimentary rocks and Proterozoic detrital zircon grains are present. This change is probably due to a combination of two factors: (1) pre-Middle Jurassic erosion of the Late Triassic – Early Jurassic arc of Quesnellia, making it a less dominant source, and (2) the increase in importance of the eastern parts of Quesnellia and the pericratonic terranes, such as Kootenay Terrane, both with characteristically more evolved isotopic values. Basin shale environments throughout the Jurassic show continental influence that is reflected in the evolved geochemistry and Sm–Nd isotopes of the sedimentary rocks. The data suggest southern Quesnellia received material from the North American continent throughout the Jurassic but that this continental influence was diluted by proximal arc sources in the rocks of proximal derivation. The presence of continent-derived material in the distal sedimentary rocks of this study suggests that southern Quesnellia is comparable to known pericratonic terranes.

Early Cretaceous granitic dykes in the western Dabie Orogen, China: Geochronology, petrogenesis, and tectonic implications

2018 ◽  
Vol 54 (6) ◽  
pp. 3574-3592
Author(s):  
Jiang Zhu ◽  
Lianxun Wang ◽  
Jian Ma ◽  
Zuomin Zhou ◽  
Xin Deng ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Dabie Orogen ◽  
Tectonic Implications
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