Preparation of the free-air gravity anomaly map in the land and seas of China and adjacent areas using multi-source gravity data and interpretation of the gravity field

doi:10.6038/cjg20141206

CORC > 中国地质调查局 > 中国地质调查局 > 中国地质调查局青岛海洋地质研究所

	Preparation of the free-air gravity anomaly map in the land and seas of China and adjacent areas using multi-source gravity data and interpretation of the gravity field
	Yang Jin-Yu 8; Zhang Xun-Hua ; Zhang Fei-Fei ; Han Bo ; Tian Zhen-Xing
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2014
卷号	57 期号:12 页码:3920-3931
关键词	Free-air gravity anomaly Conterminous map from land to sea Satellite altimetry derived gravity Measured gravity data Synthetic free-air gravity
ISSN号	0001-5733
DOI	10.6038/cjg20141206
英文摘要	Multi-source gravity data including measurements on land, shipboard surveys, altimetry, Bouguer gravity anomalies and EGM2008 global gravity model data are collected and analyzed for compiling the freei-air gravity anomaly map on the scale of 1 : 5000000 in the land and seas of China and adjacent areas. The data merging and integration method is established based on analysis of the accuracy and resolution of different sources of gravity data. Evenly distributed land gravity data could be gridded in flat land areas. A synthetic method using Bouguer gravity and high precision topographic data to calculate the free-air gravity data is proposed to fill the land areas where the gravity measurement is hardly or impossible to implement due to complex terrain. Data comparison between the synthetic free-air gravity data, measured data and EGM2008 data proves that using the synthetic data is a better choice for filling the areas lacking real data. This method is also applied to the continental and island areas outside mainland China where there are no real data collected. The STD analysis method is applied to the northern part of the South China Sea to compare the accuracy of three independent gravity data, the shipboard gravity data and two kinds of satellite altimetry derived gravity data, the SS series from Scripps, US and DNSC08GRA from DTU, Denmark. SS V18. 1 and DNSC08GRA data, which show very good consistence in terms of accuracy and resolution. The standard deviation of the two kinds of satellite gravity data in the SCS is less than 2mGal, which is a major improvement compared with the former SS V16. 1. With the rectification of shipboard gravity data, the wide coverage of satellite gravity data could be used for small-scale free-air gravity mapping. In the coastal zone, the EGM2008 global potential model is used as a reference field providing a seamless gravity transition from land to ocean. Wavelet transform and multiscale analyses are applied to decompose the free-air gravity field in China and its adjacent areas to help the gravity field interpretation. Eight anomaly areas are confined by three horizontal and four vertical first-order gravity gradient belts. Anomaly subareas and the second-order gravity gradient belts are delineated in the gravity field to provide evidence for establishing the tectonic framework in the block tectonic scheme.
学科主题	地球物理勘探
WOS关键词	SATELLITE ALTIMETRY
WOS研究方向	Geochemistry & Geophysics
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000347270700007
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40296]
专题	中国地质调查局青岛海洋地质研究所
作者单位	1.[Yang Jin-Yu 2.Zhang Xun-Hua 3.Zhang Fei-Fei 4.Han Bo 5.Minist Land & Resources, Key Lab Marine Hydrocarbon Resources & Environm G, Qingdao 266071, Peoples R China 6.Qingdao Natl Oceanog Lab, Funct Lab Marine Mineral Resource Geol & Explorat, Qingdao 266000, Peoples R China 7.Qingdao Inst Marine Geol, Qingdao 266071, Peoples R China 8.中国地质调查局青岛海洋地质研究所
推荐引用方式 GB/T 7714	Yang Jin-Yu,Zhang Xun-Hua,Zhang Fei-Fei,et al. Preparation of the free-air gravity anomaly map in the land and seas of China and adjacent areas using multi-source gravity data and interpretation of the gravity field[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2014,57(12):3920-3931.
APA	Yang Jin-Yu,Zhang Xun-Hua,Zhang Fei-Fei,Han Bo,&Tian Zhen-Xing.(2014).Preparation of the free-air gravity anomaly map in the land and seas of China and adjacent areas using multi-source gravity data and interpretation of the gravity field.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,57(12),3920-3931.
MLA	Yang Jin-Yu,et al."Preparation of the free-air gravity anomaly map in the land and seas of China and adjacent areas using multi-source gravity data and interpretation of the gravity field".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 57.12(2014):3920-3931.