中国东部海区及邻域区域构造图的编制方法及地质构造单元划分

我国东部海区及邻域1:1 000 000地质地球物理系列图将于2008年底出版,区域构造图是其中的主要专业图件之一。讨论了该专业图件的编图方法、地质构造单元的划分方法和主要地质构造单元。首次对黄海东海区进行了全面剥皮编图,剥去了Q+N₂地层。对于沉积盆地用等厚度线表示出了新生界的厚度。地质构造单元划分方法是以板块构造理论为指导并以现今的构造特征为主要划分依据。板块内构造单元的划分是在总结国内外多种构造单元划分方法的基础上进行了修改完善,完成了对我国东部海区及邻域的地质构造单元的划分。区内一级构造单元为板块(太平洋板块、欧亚板块和菲律宾海板块),二级构造单元为构造域(东亚大陆构造域、东亚大陆边缘构造域和西太平洋构造域)。西太平洋构造域主要包括太平洋板块的西部及菲律宾海板块。欧亚板块在该区的部分可分为东亚大陆边缘构造域和东亚大陆构造域。东亚大陆边缘构造域由日本琉球岛弧、冲绳海槽弧后盆地、日本海弧后盆地等次级构造单元构成。东亚大陆构造域在该区内由中朝地块、扬子地块、华南地块等次级构造单元构成。各地块又可划分出盆地、隆褶带、隆起区等多个次一级地质构造单元。最低一级的地质构造单元为凸起和凹陷。

The mapping methods and division of tectonic units of the regional tectonic map in the Huanghai Sea and the East China Sea and adjacent regions

The geological-geophysical map(1:1 000 000) series of the Huanghai Sea and the East China Sea and adjacent regions will be published in the late half year of 2008.The regional tectonic map is one of the main professional maps.The mapping methods, the division method of geological tectonic units and the main geological tectonic units are mainly discussed.The strata from Pliocene to Holocene are peeled off so as to display the Pre-Pliocene structures.In basins, isopaches are drawn for the Cenozoic deposits.The plate tectonic theory and present tectonic pattern are adopted as the priorities in tectonic division.As to the division of intraplate tectonic units, it is a revision, complement and improvement of previous dividing systems, and the nomenclature for each tectonic unit follows the current system in China.The first-order tectonic unit is plate (Pacific Plate, Eurasian Plate and Philippine Sea Plate).The second-order tectonic unit is tectonic domain(East Asian continental tectonic domain, East Asian continental margin tectonic domain and West Pacific tectonic domain).The Philippine Sea Plate and the west part of the Pacific Plate are called the West Pacific tectonic domain.The part of the Eurasian Plate involved in this study area can be further divided into East Asian continental tectonic domain and East Asian continental margin tectonic domain.The Asian continental marg in domain is composed of the Ryūkyū island arc, the Okinaw a Trough back-arc basin and the back-arc basin of Sea of Japan.The Asian continental tectonic domain in this study area is composed of the Sino-Korea Massif, Yangtze Massif and South China Massif.In turn, these massifs consist of basins, folded belts or uplift zones.The basins, the folded belts or the uplift zones are further divided into uplifts and depressions made up of sags and swells.