Geomagnetic basement relief of the Northern Taiwan area

Kuang-Jung Chen, Chao Ming Wang, Shu Kun Hsu, Wen Tzong Liang

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A detailed magnetic survey has been carried out in the northern Taiwan area in order to determine the topographic surface of the magnetic basement. This survey covers an area of about 900 km2, and totally the observation point is 269. After geomagnetic corrections of the observed data, the magnetic anomaly map was obtained. For the purpose of resolving the deeper (relative to the shallow effects) magnetic basement, a low-pass filter was applied to the magnetic anomaly to obtain a smoothed magnetic anomaly. Thirteen profiles were designed to cross and cover evenly the smoothed geomagnetic anomaly in the study area. These geomagnetic anomaly profiles were inverted to obtain the magnetic basement profiles by trial and error method. Compiling these 1-D magnetic basement profiles, we outlined the 2-D magnetic basement relief. The pattern of the relief of the geomagnetic basement shows that the depth is ranged from 2.6 to 6 km. There exists a basement high under the Tatun volcano area. Compiling with the topographic relief, we can find that they correlate to each other well, except for a contravention in the mountainous area surrounding the Taipei basin. This converse can be explained by supposing that tectonic forces lifted the mountainous area after the basement was formed. In order to verify the "truth" of the solution, we calculated the theoretical geomagnetic anomaly using the model we have inverted. Comparing the result with the observed geomagnetic anomaly map, we can find that they are quite similar to each other, with only a small variance.

Original languageEnglish
Pages (from-to)441-460
Number of pages20
JournalTerrestrial, Atmospheric and Oceanic Sciences
Volume12
Issue number3
DOIs
Publication statusPublished - 2001 Jan 1

Fingerprint

relief
magnetic anomaly
anomaly
magnetic survey
volcano
filter
tectonics
basin
mountainous area

Keywords

  • Magnetic anomaly
  • Magnetic basement
  • Magnetic survey

ASJC Scopus subject areas

  • Oceanography
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)

Cite this

Geomagnetic basement relief of the Northern Taiwan area. / Chen, Kuang-Jung; Wang, Chao Ming; Hsu, Shu Kun; Liang, Wen Tzong.

In: Terrestrial, Atmospheric and Oceanic Sciences, Vol. 12, No. 3, 01.01.2001, p. 441-460.

Research output: Contribution to journalArticle

Chen, Kuang-Jung ; Wang, Chao Ming ; Hsu, Shu Kun ; Liang, Wen Tzong. / Geomagnetic basement relief of the Northern Taiwan area. In: Terrestrial, Atmospheric and Oceanic Sciences. 2001 ; Vol. 12, No. 3. pp. 441-460.
@article{06c4c0cc606748789ebfad06a1090e04,
title = "Geomagnetic basement relief of the Northern Taiwan area",
abstract = "A detailed magnetic survey has been carried out in the northern Taiwan area in order to determine the topographic surface of the magnetic basement. This survey covers an area of about 900 km2, and totally the observation point is 269. After geomagnetic corrections of the observed data, the magnetic anomaly map was obtained. For the purpose of resolving the deeper (relative to the shallow effects) magnetic basement, a low-pass filter was applied to the magnetic anomaly to obtain a smoothed magnetic anomaly. Thirteen profiles were designed to cross and cover evenly the smoothed geomagnetic anomaly in the study area. These geomagnetic anomaly profiles were inverted to obtain the magnetic basement profiles by trial and error method. Compiling these 1-D magnetic basement profiles, we outlined the 2-D magnetic basement relief. The pattern of the relief of the geomagnetic basement shows that the depth is ranged from 2.6 to 6 km. There exists a basement high under the Tatun volcano area. Compiling with the topographic relief, we can find that they correlate to each other well, except for a contravention in the mountainous area surrounding the Taipei basin. This converse can be explained by supposing that tectonic forces lifted the mountainous area after the basement was formed. In order to verify the {"}truth{"} of the solution, we calculated the theoretical geomagnetic anomaly using the model we have inverted. Comparing the result with the observed geomagnetic anomaly map, we can find that they are quite similar to each other, with only a small variance.",
keywords = "Magnetic anomaly, Magnetic basement, Magnetic survey",
author = "Kuang-Jung Chen and Wang, {Chao Ming} and Hsu, {Shu Kun} and Liang, {Wen Tzong}",
year = "2001",
month = "1",
day = "1",
doi = "10.3319/TAO.2001.12.3.441(T)",
language = "English",
volume = "12",
pages = "441--460",
journal = "Terrestrial, Atmospheric and Oceanic Sciences",
issn = "1017-0839",
publisher = "中華民國地球科學學會",
number = "3",

}

TY - JOUR

T1 - Geomagnetic basement relief of the Northern Taiwan area

AU - Chen, Kuang-Jung

AU - Wang, Chao Ming

AU - Hsu, Shu Kun

AU - Liang, Wen Tzong

PY - 2001/1/1

Y1 - 2001/1/1

N2 - A detailed magnetic survey has been carried out in the northern Taiwan area in order to determine the topographic surface of the magnetic basement. This survey covers an area of about 900 km2, and totally the observation point is 269. After geomagnetic corrections of the observed data, the magnetic anomaly map was obtained. For the purpose of resolving the deeper (relative to the shallow effects) magnetic basement, a low-pass filter was applied to the magnetic anomaly to obtain a smoothed magnetic anomaly. Thirteen profiles were designed to cross and cover evenly the smoothed geomagnetic anomaly in the study area. These geomagnetic anomaly profiles were inverted to obtain the magnetic basement profiles by trial and error method. Compiling these 1-D magnetic basement profiles, we outlined the 2-D magnetic basement relief. The pattern of the relief of the geomagnetic basement shows that the depth is ranged from 2.6 to 6 km. There exists a basement high under the Tatun volcano area. Compiling with the topographic relief, we can find that they correlate to each other well, except for a contravention in the mountainous area surrounding the Taipei basin. This converse can be explained by supposing that tectonic forces lifted the mountainous area after the basement was formed. In order to verify the "truth" of the solution, we calculated the theoretical geomagnetic anomaly using the model we have inverted. Comparing the result with the observed geomagnetic anomaly map, we can find that they are quite similar to each other, with only a small variance.

AB - A detailed magnetic survey has been carried out in the northern Taiwan area in order to determine the topographic surface of the magnetic basement. This survey covers an area of about 900 km2, and totally the observation point is 269. After geomagnetic corrections of the observed data, the magnetic anomaly map was obtained. For the purpose of resolving the deeper (relative to the shallow effects) magnetic basement, a low-pass filter was applied to the magnetic anomaly to obtain a smoothed magnetic anomaly. Thirteen profiles were designed to cross and cover evenly the smoothed geomagnetic anomaly in the study area. These geomagnetic anomaly profiles were inverted to obtain the magnetic basement profiles by trial and error method. Compiling these 1-D magnetic basement profiles, we outlined the 2-D magnetic basement relief. The pattern of the relief of the geomagnetic basement shows that the depth is ranged from 2.6 to 6 km. There exists a basement high under the Tatun volcano area. Compiling with the topographic relief, we can find that they correlate to each other well, except for a contravention in the mountainous area surrounding the Taipei basin. This converse can be explained by supposing that tectonic forces lifted the mountainous area after the basement was formed. In order to verify the "truth" of the solution, we calculated the theoretical geomagnetic anomaly using the model we have inverted. Comparing the result with the observed geomagnetic anomaly map, we can find that they are quite similar to each other, with only a small variance.

KW - Magnetic anomaly

KW - Magnetic basement

KW - Magnetic survey

UR - http://www.scopus.com/inward/record.url?scp=0035537786&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035537786&partnerID=8YFLogxK

U2 - 10.3319/TAO.2001.12.3.441(T)

DO - 10.3319/TAO.2001.12.3.441(T)

M3 - Article

AN - SCOPUS:0035537786

VL - 12

SP - 441

EP - 460

JO - Terrestrial, Atmospheric and Oceanic Sciences

JF - Terrestrial, Atmospheric and Oceanic Sciences

SN - 1017-0839

IS - 3

ER -