Jurnal Internasional Paleomagnetisme dan variasi paleosecular dari dataran tinggi vulkanik Plio-Pleistocene Golan, Israel – Behar – – Geokimia, Geofisika, Geosystems

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Jurnal Internasional Paleomagnetisme dan variasi paleosecular dari dataran tinggi vulkanik Plio-Pleistocene Golan, Israel – Behar – – Geokimia, Geofisika, Geosystems

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Statistical analysis of geomagnetic paleosecular variation (PSV) and average time field (TAF) based largely on global compilation of paleomagnetic data from lava flows. This shows a different trend in the average tendency anomaly (ΔI) between the two hemispheres, with a small positive anomaly (-5 °) in mid-north latitude. To examine the large ΔI between 20 ° N- 40 ° N we added global data with a new paleomagnetic dataset from Golan-Heights (GH), the Plio-Pleistocene volcanic plateau in northeastern Israel, located at 32 ° N-33 °. N. The GH dataset consists of 91 lava flow sites: 40 sites were obtained in the 1990s and 51 were obtained in this study. Chronological currents are limited by 57 40 Ar / 39 Age: 39 from previous studies and 18 from this study, which together cover most of the GH plateau. We show that the 1990s dataset might be affected by block rotation and not fully take PSV samples. Plio-Pleistocene poles (86.3 ° N, 120.8 ° E, N = 44, k = 25, α 95 = 4.4 °), calculated after applying the selection criteria with Fisher's precision parameters ( k) ≥100 and the number of specimens per site (n) ≥ 5 is consistent with the geocentric axial dipole plane and shows a smaller anomalous tendency (ΔI = -0.4 °) than predicted by global compilation and PSV models. Re-examination of inclination anomalies in global compilation using various calculation methods and selection criteria shows that the inclination anomaly values ​​are influenced by: (1) inclusion of poor quality data, (2) average data based on a latitude tray and (3) the way the trend anomaly is calculated .

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