Avto Goguitchaichvili, Ricardo Pacheco Baltazar, Rubén Cejudo, Rafael García-Ruiz, Fernando Montejo, Vadim Kravchinsky, Miguel Cervantes, Carlos Reina, Juan Morales
{"title":"从美洲可能最古老的陶器中获得的绝对地磁古强度","authors":"Avto Goguitchaichvili, Ricardo Pacheco Baltazar, Rubén Cejudo, Rafael García-Ruiz, Fernando Montejo, Vadim Kravchinsky, Miguel Cervantes, Carlos Reina, Juan Morales","doi":"10.1007/s11600-025-01628-z","DOIUrl":null,"url":null,"abstract":"<div><p>We carried out a detailed rock-magnetic and absolute paleointensity investigation on well-dated, presumably the oldest American pottery from northern Colombia (around 4000 B.C.) The study aims to contribute to the reconstruction of Earth’s Magnetic Field strength fluctuations in the southern hemisphere, improving extremely incipient archaeomagnetic database for the Caribbean region through comprehensive rock-magnetic and archaeointensity analysis of Puerto Chacho pottery (Lat: 10° .110 N, Long: 75° .455 W). Essentially Ti-poor titanomagnetite and some fractions of hematite are main magnetic carriers of apparently pseudo-single-domain state. Individual intensities obtained from Puerto Chacho archaeological site vary from 8.7 ± 0.5 to 27.3 ± 1.2 μT, which corresponds to the Virtual Axial Dipole Moments (VADM) values between 2.2 ± 0.1 and 6.8 ± 0.3 10<sup>22</sup> Am<sup>2</sup>. The mean Puerto Chacho’s intensity determined for all twenty-three accepted values is 17.1 ± 6.2 μT, corresponding to the mean VADM of 4.2 ± 1.5 10<sup>22</sup> Am<sup>2</sup>. These values are significantly lower compared to nearby San Jacinto paleointensities (Goguitchaishvili et al. in Phys Earth Planet Interiors 31:107061, 2023), considered belonging older archaeological periods. Moreover, the absolute intensity values obtained from the Puerto Chacho pottery yielded relatively low values compared to those derived from three available global field prediction models SHA.DIF.14 K, CALS10k.1b and ArchKalmag.14 K and existing data obtained from previously published studies from Colombia and surrounding areas. A bootstrap analysis of available age distributions and updated radiocarbon calibration values indicate that absolute age intervals for Puerto Chacho are younger, which may explain the difference between the intensity values. The time interval between 6000 and 5000 BP was probably characterized by some drastic variations of the Earth’s magnetic Field strength. Although many studies have recently become available, no conclusions may be drawn about the regional fluctuations of the geomagnetic field strength.</p></div>","PeriodicalId":6988,"journal":{"name":"Acta Geophysica","volume":"73 5","pages":"4425 - 4438"},"PeriodicalIF":2.1000,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11600-025-01628-z.pdf","citationCount":"0","resultStr":"{\"title\":\"Absolute geomagnetic paleointensities obtained from the Americas’ presumably oldest pottery\",\"authors\":\"Avto Goguitchaichvili, Ricardo Pacheco Baltazar, Rubén Cejudo, Rafael García-Ruiz, Fernando Montejo, Vadim Kravchinsky, Miguel Cervantes, Carlos Reina, Juan Morales\",\"doi\":\"10.1007/s11600-025-01628-z\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>We carried out a detailed rock-magnetic and absolute paleointensity investigation on well-dated, presumably the oldest American pottery from northern Colombia (around 4000 B.C.) The study aims to contribute to the reconstruction of Earth’s Magnetic Field strength fluctuations in the southern hemisphere, improving extremely incipient archaeomagnetic database for the Caribbean region through comprehensive rock-magnetic and archaeointensity analysis of Puerto Chacho pottery (Lat: 10° .110 N, Long: 75° .455 W). Essentially Ti-poor titanomagnetite and some fractions of hematite are main magnetic carriers of apparently pseudo-single-domain state. Individual intensities obtained from Puerto Chacho archaeological site vary from 8.7 ± 0.5 to 27.3 ± 1.2 μT, which corresponds to the Virtual Axial Dipole Moments (VADM) values between 2.2 ± 0.1 and 6.8 ± 0.3 10<sup>22</sup> Am<sup>2</sup>. The mean Puerto Chacho’s intensity determined for all twenty-three accepted values is 17.1 ± 6.2 μT, corresponding to the mean VADM of 4.2 ± 1.5 10<sup>22</sup> Am<sup>2</sup>. These values are significantly lower compared to nearby San Jacinto paleointensities (Goguitchaishvili et al. in Phys Earth Planet Interiors 31:107061, 2023), considered belonging older archaeological periods. Moreover, the absolute intensity values obtained from the Puerto Chacho pottery yielded relatively low values compared to those derived from three available global field prediction models SHA.DIF.14 K, CALS10k.1b and ArchKalmag.14 K and existing data obtained from previously published studies from Colombia and surrounding areas. A bootstrap analysis of available age distributions and updated radiocarbon calibration values indicate that absolute age intervals for Puerto Chacho are younger, which may explain the difference between the intensity values. The time interval between 6000 and 5000 BP was probably characterized by some drastic variations of the Earth’s magnetic Field strength. Although many studies have recently become available, no conclusions may be drawn about the regional fluctuations of the geomagnetic field strength.</p></div>\",\"PeriodicalId\":6988,\"journal\":{\"name\":\"Acta Geophysica\",\"volume\":\"73 5\",\"pages\":\"4425 - 4438\"},\"PeriodicalIF\":2.1000,\"publicationDate\":\"2025-07-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s11600-025-01628-z.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Acta Geophysica\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11600-025-01628-z\",\"RegionNum\":4,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Geophysica","FirstCategoryId":"89","ListUrlMain":"https://link.springer.com/article/10.1007/s11600-025-01628-z","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Absolute geomagnetic paleointensities obtained from the Americas’ presumably oldest pottery
We carried out a detailed rock-magnetic and absolute paleointensity investigation on well-dated, presumably the oldest American pottery from northern Colombia (around 4000 B.C.) The study aims to contribute to the reconstruction of Earth’s Magnetic Field strength fluctuations in the southern hemisphere, improving extremely incipient archaeomagnetic database for the Caribbean region through comprehensive rock-magnetic and archaeointensity analysis of Puerto Chacho pottery (Lat: 10° .110 N, Long: 75° .455 W). Essentially Ti-poor titanomagnetite and some fractions of hematite are main magnetic carriers of apparently pseudo-single-domain state. Individual intensities obtained from Puerto Chacho archaeological site vary from 8.7 ± 0.5 to 27.3 ± 1.2 μT, which corresponds to the Virtual Axial Dipole Moments (VADM) values between 2.2 ± 0.1 and 6.8 ± 0.3 1022 Am2. The mean Puerto Chacho’s intensity determined for all twenty-three accepted values is 17.1 ± 6.2 μT, corresponding to the mean VADM of 4.2 ± 1.5 1022 Am2. These values are significantly lower compared to nearby San Jacinto paleointensities (Goguitchaishvili et al. in Phys Earth Planet Interiors 31:107061, 2023), considered belonging older archaeological periods. Moreover, the absolute intensity values obtained from the Puerto Chacho pottery yielded relatively low values compared to those derived from three available global field prediction models SHA.DIF.14 K, CALS10k.1b and ArchKalmag.14 K and existing data obtained from previously published studies from Colombia and surrounding areas. A bootstrap analysis of available age distributions and updated radiocarbon calibration values indicate that absolute age intervals for Puerto Chacho are younger, which may explain the difference between the intensity values. The time interval between 6000 and 5000 BP was probably characterized by some drastic variations of the Earth’s magnetic Field strength. Although many studies have recently become available, no conclusions may be drawn about the regional fluctuations of the geomagnetic field strength.
期刊介绍:
Acta Geophysica is open to all kinds of manuscripts including research and review articles, short communications, comments to published papers, letters to the Editor as well as book reviews. Some of the issues are fully devoted to particular topics; we do encourage proposals for such topical issues. We accept submissions from scientists world-wide, offering high scientific and editorial standard and comprehensive treatment of the discussed topics.