What is it about?
In this article we present a high-resolution paleomagnetic and rock magnetic study of two cores, LCTF1 and LCTF2, collected at Carmen Lake (Tierra del Fuego, Argentina). An analysis of rock magnetic data suggests that the remanence signal is carried by Titanomagnetite grains in stable pseudo single domain (PSD) state. Notwithstanding the special mechanism of sedimentary deposition, the sequence is characterised by good paleomagnetic properties and can be used to reconstruct a continuous stratigraphic record that provides high-resolution declination, inclination and relative paleointensity curves for the period 1000–4000 cal years BP.
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Why is it important?
A comparison of the paleosecular variation records of southern Argentina with the most recent models available demonstrates that there is a noticeable lack of agreement, which is interpreted as the critical need to add more data from the southern hemisphere in the construction of the geomagnetic field models.
Perspectives
The good coincidence between the records provides a promising approach to refining the chronology of the sediments and encourages us to deduce the general pattern for Southern of South America.
Dr María A Irurzun
CIFICEN
Read the Original
This page is a summary of: A continuous Late Holocene paleosecular variation record from Carmen Lake (Tierra del Fuego, Argentina), Physics of The Earth and Planetary Interiors, July 2018, Elsevier,
DOI: 10.1016/j.pepi.2018.04.006.
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