Correlation and dating with strontium-isotope stratigraphy

2018 ◽  
pp. 133-145 ◽  
Author(s):  
John M. McArthur
Keyword(s):  
Strontium Isotope ◽  
Strontium Isotope Stratigraphy ◽  
Isotope Stratigraphy

Strontium Isotope Stratigraphy at Middle Eocene from the Zagros Mountains of Iran

2016 ◽  
Author(s):  
B. Almasinia ◽  
S. Ali Moallemi ◽  
F. Fürsich ◽  
M. Ahmad Hosseini
Keyword(s):  
Middle Eocene ◽  
Strontium Isotope ◽  
Zagros Mountains ◽  
Strontium Isotope Stratigraphy ◽  
Isotope Stratigraphy

scholarly journals Intrabasinal sediment recycling from detrital strontium isotope stratigraphy

Geology ◽  
2020 ◽  
Vol 48 (10) ◽  
pp. 992-996 ◽  
Author(s):  
Neal C. Auchter ◽  
Brian W. Romans ◽  
Stephen M. Hubbard ◽  
Benjamin G. Daniels ◽  
Howie D. Scher ◽  
...  
Keyword(s):  
Strontium Isotope ◽  
Sediment Storage ◽  
Ancient Source ◽  
Strontium Isotope Stratigraphy ◽  
Source To Sink ◽  
Combined Use ◽  
Magallanes Basin ◽  
Mineralization Age ◽  
Isotope Stratigraphy ◽  
Depositional Age

Abstract Temporary storage of sediment between source and sink can hinder reconstruction of climate and/or tectonic signals from stratigraphy by mixing of sediment tracers with diagnostic geochemical or geochronological signatures. Constraining the occurrence and timing of intrabasinal sediment recycling has been challenging because widely used detrital geo-thermochronology applications do not record shallow burial and subsequent reworking. Here, we apply strontium isotope stratigraphy techniques to recycled marine shell material in slope deposits of the Upper Cretaceous Tres Pasos Formation, Magallanes Basin, Chile. Detrital 87Sr/86Sr ages from 94 samples show that the majority (>85%) of the shells are >1–12 m.y. older than independently constrained depositional ages. We interpret the gap between mineralization age (87Sr/86Sr age) and depositional age of host strata to represent the intrabasinal residence time of sediment storage at the million-year time scale. We also use specimen type to infer relative position of intrabasinal source material along the depositional profile, where oysters represent shallow-water (i.e., proximal) sources and inoceramids represent deeper-water (i.e., distal) sources. The combined use of detrital strontium isotope ages and specimen types from linked depositional segments provides an opportunity to identify and quantify sediment storage and recycling in ancient source-to-sink systems.

Strontium isotope stratigraphy and paleomagnetic age constraints on the evolution history of coral reef islands, northern South China Sea

2019 ◽  
Vol 132 (3-4) ◽  
pp. 803-816 ◽  
Author(s):  
Tianlai Fan ◽  
Kefu Yu ◽  
Jianxin Zhao ◽  
Wei Jiang ◽  
Shendong Xu ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Evolutionary History ◽  
Northern South China Sea ◽  
Strontium Isotope ◽  
China Sea ◽  
Strontium Isotope Stratigraphy ◽  
History Of ◽  
Reef Islands ◽  
Isotope Stratigraphy

Abstract Understanding the history of the response of coral reefs to past climate changes can provide valuable information for predicting the future response of modern reefs. However, dating such ancient biotic carbonate is still challenging because of its sensitivity to diagenetic alteration processes, scarcity of well-preserved fossils, and low magnetic mineral content. There have been a long debates about the origin and evolutionary history of coral reefs in the northern South China Sea, mainly due to the lack of direct and reliable age constraints. This provides us with a good opportunity to verify the practicability of different dating approaches, especially the strontium (Sr) isotope analysis of bulk carbonate. Here, we retrieved a 972.55-m-long core from the Xisha Islands to provide a credible chronologic constraint on the carbonate platform evolution. The lithostratigraphy, strontium isotope stratigraphy, and magnetostratigraphy were analyzed throughout the whole reef sequence. The lithostratigraphic results show that the 873.55 m reef sequence developed on an ancient volcaniclastic basement and experienced multiple evolutionary phases. The 87Sr/86Sr results of all 100 bulk carbonate samples vary from 0.708506 to 0.709168 and show a monotonic increase with decreasing depth, except for a few outliers. Trace-element criteria and stable isotope (δ18O and δ13C) methods were applied to these bulk carbonate samples, and results imply that the primary or near-primary seawater 87Sr/86Sr values were likely preserved, although different degrees of diagenetic alteration occurred. In addition, the paleomagnetic results indicate 10 normal polarity and eight reversed polarity magnetozones. Based on the 87Sr/86Sr ratios of the selected 58 samples and paleomagnetic reconstruction of polarity reversals, the bottom of the reef sequence is dated to 19.6 Ma, and the observed polarity chronozones extend from chron C6 (19.722–18.748 Ma) at 866.60 m to present at the top. Based on the new data, we propose a new chronologic framework for the evolutionary history of the reef islands, where: (1) the reefs initiated in the early Miocene (19.6 Ma) and were drowned until 16.26 Ma; (2) during 16.26–10.66 Ma, lagoon to lagoon slope environments prevailed; (3) the lagoon environment progressively transformed into a reef crest environment from 10.66 to 4.36 Ma and 4.36 to 1.59 Ma; and (4) the reef started to be drowned again during 1.59–0 Ma. Our study provides a new and reliable chronologic constraint on the general evolutionary history of the reef islands in the northern South China Sea. Furthermore, the 87Sr/86Sr results from bulk carbonate indicate that strontium isotope stratigraphy is a powerful dating tool only when rigid sample selection, sequential leaching procedures, and strict trace-element and isotopic criteria are applied.

scholarly journals Is Strontium-isotope stratigraphy a reliable tool for dating shallow-marine platform carbonates at the Barremian-Aptian transition? Review of western Tethyan case studies

2018 ◽  
Vol 18 (5) ◽  
pp. 139-154 ◽  
Author(s):  
Camille Frau ◽  
Jean-Pierre Masse ◽  
Mukerrem Fenerci-Masse ◽  
Anthony J.-B. Tendil ◽  
Antoine Pictet ◽  
...  
Keyword(s):  
Case Studies ◽  
Strontium Isotope ◽  
Shallow Marine ◽  
Reliable Tool ◽  
Strontium Isotope Stratigraphy ◽  
Isotope Stratigraphy ◽  
Platform Carbonates ◽  
Marine Platform

Comment and Reply on "Strontium-isotope stratigraphy of Enewetak Atoll"

Geology ◽  
1989 ◽  
Vol 17 (2) ◽  
pp. 190 ◽  
Author(s):  
Bruce R. Wardlaw ◽  
Robert B. Halley ◽  
Kenneth R. Ludwig
Keyword(s):  
Strontium Isotope ◽  
Strontium Isotope Stratigraphy ◽  
Isotope Stratigraphy ◽  
Enewetak Atoll

Strontium isotope stratigraphy of the Middle Devonian: Brachiopods and conodonts

1996 ◽  
Vol 60 (4) ◽  
pp. 639-652 ◽  
Author(s):  
Andreas Diener ◽  
Stefan Ebneth ◽  
Ján Veizer ◽  
Dieter Buhl
Keyword(s):  
Middle Devonian ◽  
Strontium Isotope ◽  
Strontium Isotope Stratigraphy ◽  
Isotope Stratigraphy

A New Geochemical Tool to Screen Carbonates for Strontium Isotope Stratigraphy

2015 ◽  
Author(s):  
Xin N. Yong ◽  
Kevin Welsh* ◽  
Gregory E. Webb ◽  
Willem Renema ◽  
John M. Pandolfi ◽  
...  
Keyword(s):  
Strontium Isotope ◽  
Strontium Isotope Stratigraphy ◽  
Isotope Stratigraphy
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