Holocene paleomagnetic secular variation records from the western Equatorial Pacific Ocean

Lund, Steve P.; Stott, L. D.; Schwartz, Martha; Thunell, Robert C.; Chen, Amy P.

doi:10.1016/j.epsl.2006.03.056

Cited by 18 publications

(10 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additional sediment records that were not used in the CALS10k.2 and HFM.OL1.A1 models have been employed in GGF100k. They mostly come from lakes covering the past 10 ka and beyond, for example, Lake Yogo (Hyodo et al, ); Beppu Bay (Ohno et al, ); Shikoku, Japan Sea (Ohno et al, ); Sun‐Moon Lake, Taiwan (Lee et al, ); Lake Tangra Yumco, Tibetan Plateau (Henkel et al, ); MD06‐3040, China Sea (Zheng et al, ); Mavora Lakes, New Zealand (Turner et al, ); LPA and PTA03, Laguna Potrok Aike, Argentina (Gogorza et al, ; Kliem et al, ; Lisé‐Pronovost et al, ); and Indonesian records from South Makassar Basin and Celebs Sea (Lund et al, ).…”

Section: Resultsmentioning

confidence: 99%

Extending Global Continuous Geomagnetic Field Reconstructions on Timescales Beyond Human Civilization

Panovska

Constable

Korte

2018

Geochem Geophys Geosyst

141

View full text Add to dashboard Cite

Study of the late Quaternary geomagnetic field contributes significantly to understanding the origin of millennial‐scale paleomagnetic secular variations, the structure of geomagnetic excursions, and the long‐term shielding by the geomagnetic field. A compilation of paleomagnetic sediment records and archeomagnetic and lava flow data covering the past 100 ka enables reconstruction of the global geomagnetic field on such long‐term scales. We use regularized inversion to build the first global, time‐dependent, geomagnetic field model spanning the past 100 ka, named GGF100k (Global Geomagnetic Field over the past 100 ka). Spatial parametrization of the model is in spherical harmonics and time variations with cubic splines. The model is heavily constrained by more than 100 continuous sediment records covering extended periods of time, which strongly prevail over the limited number of discrete snapshots provided by archeomagnetic and volcanic data. Following an assessment of temporal resolution in each sediment's magnetic record, we have introduced smoothing kernels into the forward modeling when assessing data misfit. This accommodates the smoothing inherent in the remanence acquisition in individual sediment paleomagnetic records, facilitating a closer fit to both high‐ and low‐resolution records in regions where some sediments have variable temporal resolutions. The model has similar spatial resolution but less temporal complexity than current Holocene geomagnetic field models. Using the new reconstruction, we discuss dipole moment variations, the time‐averaged field, and paleomagnetic secular variation activity. The new GGF100k model fills the gap in the geomagnetic power spectrum in the frequency range 100–1,000 Ma−1.

show abstract

Section: Resultsmentioning

confidence: 99%

Extending Global Continuous Geomagnetic Field Reconstructions on Timescales Beyond Human Civilization

Panovska

Constable

Korte

2018

Geochem Geophys Geosyst

141

View full text Add to dashboard Cite

show abstract

“…Nevertheless, the geographic distribution of palaeomagnetic studies on lake sediments is rather uneven. More specifically, most of the published records focus on middle and high latitudes, with only a few from lakes and marine sediments in low latitudes (Lund et al 2006; Richter et al 2006; Yang et al 2009). PSV records from the tropical area of eastern Asia are especially scarce.…”

Section: Introductionmentioning

confidence: 99%

A Holocene palaeomagnetic secular variation record from Huguangyan maar Lake, southern China

Yang¹,

Liu²,

Duan³

et al. 2012

Geophysical Journal International

View full text Add to dashboard Cite

SUMMARY A composite Holocene sediment profile ∼5 m in length, constrained by both radiocarbon dating and magnetic susceptibility based correlation, was obtained from three Livingstone piston cores collected in ∼10‐m water depth in the Huguangyan (HGY) maar lake, southern China. The homogeneous silty clay indicates stable and continuous deposition. The dominant magnetic carrier is magnetite in the pseudo‐single‐domain grain size range and thus is suitable for recording palaeomagnetic secular variations (PSV). Results show that the HGY PSV curves can be correlated faithfully to the counterparts at a regional scale. Therefore, the PSV data is a potential tool for stratigraphic correlation and for further refining the chronological framework of lake sediment sequences from Southern China. Further comparison of the HGY PSV records with the coeval European and North American counterparts confirms the existence of strong permanent magnetic flux lobes at the core–mantle boundary. The discrepancy in amplitude and out‐phase pattern among the different regional records may be ascribed to the evolution of the magnetic flux lobes.

show abstract

“…Paleomagnetic secular variation (PSV) of the Earth's magnetic field obtained from soft lacustrine sediments during the last decades [e.g., Creer et al , 1983a, 1983b; Constable and McElhinny , 1985; Lund and Baneerje , 1985; Verosub et al , 1986; Peng and King , 1992; Stockhausen , 1998; Brandt et al , 1999; Frank et al , 2002; Ojala and Saarinen , 2002; Yang et al , 2009] have been essential to reconstruct the dynamic behavior of the Earth's geomagnetic field at high‐resolution beyond the range of instrumental observations. However, most of the high‐resolution paleomagnetic studies were derived from sediments of the Northern Hemisphere and only a few records were obtained from marine sediments of the Southern Hemisphere [ Macrì et al , 2005, 2006; Lund et al , 2006a, 2006b]. During the last decade, we have made efforts to reconstruct the behavior of the Holocene geomagnetic field by studying sediment records of lakes from southwestern Argentina [ Gogorza et al , 1999, 2000a, 2000b, 2002, 2004, 2006, 2008, 2011; Irurzun et al , 2006, 2008, 2009] to fill the gaps of data distribution for the Southern Hemisphere.…”

Section: Introductionmentioning

confidence: 99%

High‐resolution paleomagnetic records from Laguna Potrok Aike (Patagonia, Argentina) for the last 16,000 years

Gogorza

Irurzun

Sinito

et al. 2012

Geochem Geophys Geosyst

View full text Add to dashboard Cite

[1] Holocene and Late-glacial records documenting variations in direction and intensity of the geomagnetic field during the last 16,000 cal. BP are presented for Southern Patagonia. This continuous high-resolution terrestrial record from Laguna Potrok Aike (51°58′S, 70°23′W) was recovered within the SALSA (South Argentinean Lake Sediment Archives and modeling) project. Mineral magnetic measurements indicate that pseudo single-domain magnetite is the major carrier of the remanence allowing the reliable determination of stable natural remanent magnetization inclinations and declinations from alternating field demagnetization and principal component analysis. Paleomagnetic secular variation records reveal most of the familiar features of declination and inclination that have previously been reported in other records from South Argentina but conspicuous centennial-scale differences are also observed. The results illustrate the potential of paleosecular variations records for dating sedimentary sequences in southern South America.

show abstract

Holocene paleomagnetic secular variation records from the western Equatorial Pacific Ocean

Cited by 18 publications

References 13 publications

Extending Global Continuous Geomagnetic Field Reconstructions on Timescales Beyond Human Civilization

Extending Global Continuous Geomagnetic Field Reconstructions on Timescales Beyond Human Civilization

A Holocene palaeomagnetic secular variation record from Huguangyan maar Lake, southern China

High‐resolution paleomagnetic records from Laguna Potrok Aike (Patagonia, Argentina) for the last 16,000 years

Contact Info

Product

Resources

About