Disproportionately high rates of sulfide oxidation from mountainous river basins of Taiwan orogeny: Sulfur isotope evidence

2012 ◽  
Vol 39 (12) ◽  
pp. n/a-n/a ◽  
Author(s):  
Anirban Das ◽  
Chuan-Hsiung Chung ◽  
Chen-Feng You
Keyword(s):  
Sulfur Isotope ◽  
Sulfide Oxidation ◽  
River Basins ◽  
Isotope Evidence ◽  
Mountainous River

Sulfur isotope evidence for transient marine-shelf oxidation during the Ediacaran Shuram Excursion

Geology ◽  
2018 ◽  
Vol 46 (3) ◽  
pp. 267-270 ◽  
Author(s):  
Wei Shi ◽  
Chao Li ◽  
Genming Luo ◽  
Junhua Huang ◽  
Thomas J. Algeo ◽  
...  
Keyword(s):  
Sulfur Isotope ◽  
Isotope Evidence

scholarly journals Monitoring Earthquake-Damaged Vegetation after the 2008 Wenchuan Earthquake in the Mountainous River Basins, Dujiangyan County

2015 ◽  
Vol 7 (6) ◽  
pp. 6808-6827 ◽  
Author(s):  
Huaizhen Zhang ◽  
Xiaomeng Wang ◽  
Jianrong Fan ◽  
Tianhe Chi ◽  
Shun Yang ◽  
...  
Keyword(s):  
Wenchuan Earthquake ◽  
River Basins ◽  
2008 Wenchuan Earthquake ◽  
The 2008 Wenchuan Earthquake ◽  
Mountainous River

scholarly journals River discharge prediction for ungauged mountainous river basins during heavy rain events based on seismic noise data

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Shakti P.C. ◽  
Kaoru Sawazaki
Keyword(s):  
River Basin ◽  
Seismic Noise ◽  
River Discharge ◽  
Heavy Rain ◽  
River Basins ◽  
Peak Discharge ◽  
Discharge Data ◽  
Noise Data ◽  
Rain Events ◽  
Mountainous River

AbstractSeveral mountainous river basins in Japan do not have a consistent hydrological record due to their complex environment and remoteness, as discharge measurements are not economically feasible. However, understanding the flow rate of rivers during extreme events is essential for preventing flood disasters around river basins. In this study, we used the high-sensitivity seismograph network (Hi-net) of Japan to identify the time and peak discharge of heavy rain events. Hi-net seismograph stations are distributed almost uniformly at distance intervals of approximately 20 km, while being available even in mountainous regions. The Mogami River Basin in Northeastern Japan was selected as a target area to compare the seismic noise data of two Hi-net stations with the hydrological response of a nearby river. These stations are not located near hydrological stations; therefore, direct comparison of seismic noise and observed discharge was not possible. Therefore, discharge data simulated using a hydrological model were first validated with gauging station data for two previous rain events (10–23 July 2004 and 7–16 September 2015). Then, the simulated river discharge was compared with Hi-net seismic noise data for three recent events (10–23 July 2004, 7–16 September 2015, and 10–15 October 2019). The seismic noise data exhibited a similar trend to the time series of simulated discharge in a frequency range of 1–2 Hz for the selected events. Discharge values predicted from the noise data effectively replicate the simulated discharge values in many cases, especially the timing and amount of peak discharge.Simulated and predicted discharge near NIED Hi-net seismic stations in the Mogami River Basin for the event of October 2019 (Typhoon Hagibis).

scholarly journals Constraining the rise of oxygen with oxygen isotopes

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
B. A. Killingsworth ◽  
P. Sansjofre ◽  
P. Philippot ◽  
P. Cartigny ◽  
C. Thomazo ◽  
...  
Keyword(s):  
Oxygen Isotopes ◽  
Atmospheric Chemistry ◽  
Meteoric Water ◽  
Sulfur Isotope ◽  
Sulfide Oxidation ◽  
Sedimentary Rocks ◽  
Sulfur Cycle ◽  
Isotope Record ◽  
Continental Weathering ◽  
S Isotope

Abstract After permanent atmospheric oxygenation, anomalous sulfur isotope compositions were lost from sedimentary rocks, demonstrating that atmospheric chemistry ceded its control of Earth’s surficial sulfur cycle to weathering. However, mixed signals of anoxia and oxygenation in the sulfur isotope record between 2.5 to 2.3 billion years (Ga) ago require independent clarification, for example via oxygen isotopes in sulfate. Here we show <2.31 Ga sedimentary barium sulfates (barites) from the Turee Creek Basin, W. Australia with positive sulfur isotope anomalies of ∆33S up to + 1.55‰ and low δ18O down to −19.5‰. The unequivocal origin of this combination of signals is sulfide oxidation in meteoric water. Geochemical and sedimentary evidence suggests that these S-isotope anomalies were transferred from the paleo-continent under an oxygenated atmosphere. Our findings indicate that incipient oxidative continental weathering, ca. 2.8–2.5 Ga or earlier, may be diagnosed with such a combination of low δ18O and high ∆33S in sulfates.

Sulfur-isotope evidence for recovery of seawater sulfate concentrations from a PTB minimum by the Smithian-Spathian transition

2019 ◽  
Vol 195 ◽  
pp. 83-95 ◽  
Author(s):  
Alan Stebbins ◽  
Thomas J. Algeo ◽  
Christian Olsen ◽  
Hiroyoshi Sano ◽  
Harold Rowe ◽  
...  
Keyword(s):  
Sulfur Isotope ◽  
Seawater Sulfate ◽  
Isotope Evidence
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