DOI: 10.35080/data.a.2020.p15
title: Spatial Database of 1∶50 000 Digital Geological Maps of Wanjia Town (J50E021024), Nancun Town (J51E021001), Gaomi City (J50E022024) and Lancun Town (J51E022001) Map-sheets, Shandong Province
title: 山东省万家镇幅 (J50E021024)、 南村镇幅 (J51E021001)、高密市幅 (J50E022024)、 蓝村镇幅 (J51E022001) 1∶ 50 000 数字地质图空间数据库

description: Wanjia−Lancun area in Shandong Province is located between Laiyang depression and Zhucheng depression in Jiaolai Basin. The spatial database of 1∶50 000 digital geological maps  of  Wanjia  Town  (J50E021024),  Nancun  Town  (J51E021001),  Gaomi  City (J50E022024), and Lancun Town (J51E022001) map sheets, Shandong Province (also referred to as the Database) was established according to the unified standards and requirements of the ‘Guidelines for 1∶50 000-Scale Regional Geological Survey in Quaternary Coverage Area (Trial)’ and  the ‘Guidelines for 1∶50 000-Scale Regional Geological Survey (Trial)’ by relying  on  the  project  titled ‘1∶50 000-Scale Regional Geological Survey of Wanjia Town, Nancun Town, Gaomi City, and Lancun Town Map Sheets, Shandong Province’ initiated by the  China  Geological  Survey  in  2016.  During  development  of  the  Database,  previous geological data were fully utilized, a digital mapping system was adopted for field geological mapping, and standard 1∶50 000 geological maps and work instructions were developed by means  of  indoor  map  preparation  combined  with  field  geological  mapping.  The  aim  of  the Database  is  to  complete  the  lithologic  mapping  of  early  Cretaceous  strata,  including Yangjiazhuang  Formation  and  Ducun  Formation  of  Laiyang  Group,  Bamudi  Formation  of Qingshan  Group,  and  Xingezhuang  Formation  of  Wangshi  Group.  A  volcanic  edifice  was discovered  for  the  first  time  in  Xingezhuang  Formation  of  Wangshi  Group,  and  the  zircon U–Pb ages of volcanic intercalations in Xingezhuang Formation were determined to be early Cretaceous.  The  paleogeographic  characteristics  of  Cretaceous  lithofacies  of Lidangjia−Mashan dome was restored according to the previous drilling data of Well JC –1, Well  JC –2  and  Well  JC –3.  Furthermore,  the  sedimentary  tectonic  framework  of Wanjia−Lancun  area  was  established.  The  database  contains  four  standard  1∶50  000 geological maps, with a data size of about 22.3 MB. LA-ICP-MS zircon U–Pb isotopic ages of three volcanic rocks, and three optically stimulated luminescence (OSL) datings and four 14C isotopic ages of Quaternary were obtained in Jiaolai Basin The maps were prepared under the CGCS2000  national  geodetic  coordinate  system  and  Gauss-Kruger  projection.  The  Database fully reflects the results of 1∶50 000-scale regional geological survey and will provide basic geological  maps  for  research,  environment  and  energy  exploration  in  Wanjia−Lancun  area, and therefore, is of great significance.
description: 山东省万家—蓝村地区位于胶莱盆地，夹于莱阳凹陷和诸城凹陷之间。依托2016年中国地质调查局“山东1∶50 000万家、南村、高密、蓝村幅区域地质调查”项目，根据《1∶50 000覆盖区区域地质调查工作指南（试行）》、《1∶50 000区域地质调查工作指南（试行）》的统一标准及要求，在充分利用以往地质资料的基础上，采用数字填图系统进行野外地质填图，并应用室内与室外填编图相结合的方法，完成标准的1∶50 000地质图及说明书编制，建立了山东省万家镇幅（J50E021024）、南村镇幅（J51E021001）、高密市幅（J50E022024）、蓝村镇幅（J51E022001）1∶50 000数字地质图空间数据库。本数据库针对早白垩世莱阳群杨家庄组、杜村组，青山群八亩地组、王氏群辛格庄组岩性填图，首次在王氏群辛格庄组发现火山机构，并确定辛格庄组内火山岩夹层锆石U-Pb年龄为早白垩世。利用前人胶参1井、2井和3井钻孔资料，恢复了李党家—马山凸起白垩纪岩相古地理，建立了山东省万家—蓝村地区沉积构造格架。本数据库包含上述4个标准1∶50 000图幅地质图，数据量约为22.3 MB，于胶莱盆地火山岩中取得LA-ICP-MS锆石U-Pb同位素年龄值3个，第四系中取得光释光年龄值3个，14C同位素年龄值4个。坐标系为CGCS2000国家大地坐标系，投影方式为高斯—克吕格投影。本数据库充分反映了1∶50 000区域地质调查成果，为区域资源环境研究、能源勘探提供基础地质图件，具有重要的参考意义。