Paleomagnetic record for the past 80 ka from the Mahanadi basin, Bay of Bengal

Usapkar, A.; Dewangan, P.; Mazumdar, Aninda; Krishna, K. S.; Ramprasad, T.; Badesab, Firoz; Patil, M. N.; Gaikwad, Virsen

doi:10.1016/j.jseaes.2017.10.024

Cited by 3 publications

(9 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our Bengal Fan RPI stack and comparisons with other records. Green and blue intervals mark RPI minima consistent in all three reports, while the orange one marks the minimum only presented at around 20 ka in theUsapkar et al (2018) record. (b) The RPI stack of our four cores, with error bars indicating the standard deviation.…”

supporting

confidence: 69%

“…Among PSV records in the Bay of Bengal, the recently published Usapkar et al (2018) (referred to hereafter as U18) from eastern India continental slope (green dot in Figure 1) provide a record of similar time scale. The 1.9-to 40.8-ka interval of susceptibility normalized U18 RPI record is intercepted and plotted ( Figure 8c).…”

Section: Comparison Of Our Rpi Stack With Regional and Global Recordsmentioning

confidence: 90%

“…The U18 record is generally consistent with our stack. Rock magnetic data show that the magnetic remanence carriers in the U18 record are mainly in the PSD or multidomain states (Usapkar et al, 2018). The 26.9-to 28.9-ka and 38.6-to 40.8-ka intervals in the U18 record are comparable to the 29-to 32-ka and 38-to 40-ka intervals in our RPI data (marked in green and blue), and two broad peaks are obvious between these two valleys.…”

Section: Comparison Of Our Rpi Stack With Regional and Global Recordsmentioning

confidence: 99%

“…Several paleomagnetic studies in this region were reported with a few environmental magnetic studies (Abrajevitch et al, 2009;Li et al, 2006). Usapkar et al (2016Usapkar et al ( , 2018 produced high-resolution PSV records from the Indian continental shelf and slope that span 8 and 80 kyr, respectively, but their records might be affected by changing sedimentation (as interpreted in Usapkar et al, 2018). Suganuma et al (2008) reported RPI records during the last 800 kyr from the Nintyeast Ridge, yet the uppermost part of their cores seems to be disturbed during coring and thus lost the last 100 kyr PSV signal.…”

Section: Introductionmentioning

confidence: 98%

“…The high accumulation rate of Bengal fan sediments during the last million years makes it an ideal region for reconstructing PSV records in South Asia. Usapkar et al (2016Usapkar et al ( , 2018 produced high-resolution PSV records from the Indian continental shelf and slope that span 8 and 80 kyr, respectively, but their records might be affected by changing sedimentation (as interpreted in Usapkar et al, 2018). Usapkar et al (2016Usapkar et al ( , 2018 produced high-resolution PSV records from the Indian continental shelf and slope that span 8 and 80 kyr, respectively, but their records might be affected by changing sedimentation (as interpreted in Usapkar et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Paleomagnetic Secular Variations During the Past 40,000 Years From the Bay of Bengal

Wang

Chang

Xue

et al. 2019

Geochem Geophys Geosyst

View full text Add to dashboard Cite

Paleomagnetic secular variations in South Asia are not well understood due to insufficient records. In this study, we produce a new paleomagnetic secular variation curve covering the past 40,000 years by stacking four marine sediment records from the middle portion of Bay of Bengal. Age models are based on radiocarbon dating and core correlation. Stepwise alternating field demagnetization was used to isolate the primary remanent component. Rock magnetic measurements indicate that the primary magnetic remanence carriers are single domain and pseudo‐single domain magnetites with no sign of diagenetic alteration. Our Bengal relative paleointensity stack is broadly consistent with local records and the PISO‐1500 relative paleointensity stack (Channell et al., 2009; https://doi.org/10.1016/j.epsl.2009.03.012). Two geomagnetic excursions presented by paleointensity minima are recognized, which correlate to the Mono Lake (29–32 ka) and Laschamp excursion (38–40 ka), respectively. We conclude that the Mono Lake and Laschamp excursion are two separate events.

show abstract

supporting

confidence: 69%

Section: Comparison Of Our Rpi Stack With Regional and Global Recordsmentioning

confidence: 90%

Section: Comparison Of Our Rpi Stack With Regional and Global Recordsmentioning

confidence: 99%