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摘要:
河南省小水幅(I49E016015)1∶50 000地质图是在充分收集、综合分析已有地质矿产资料基础上，应用数字填图技术，通过地质填图及数据库建设完成的。本地质图数据库为MapGIS格式，包括9个地层单元和6期岩浆岩事件，数据量为31.9 MB, 其中电子探针数据70个、化学捡块样测试数据57个、锆石U-Pb测年数据73个、全岩地球化学分析数据147个。图幅采用造山带填图新理论和新方法，重点突出构造–岩性填图和特殊地质体及非正式填图单位的表达，图面表达内容的科学性、易读性和实用性提高。本图幅建立了由商–丹构造带、朱–夏蛇绿构造混杂岩带、秦岭微陆块构造和二郎坪岛弧–弧后盆地组成的北秦岭造山带结构，明确了朱–夏蛇绿构造混杂岩带形成于早古生代，查明了秦岭岩群的物质组成及4期褶皱变形，确定了高压–超高压岩石空间分布规律、原岩及变质时代，揭示了秦岭微陆块整体卷入早古生代造山带并遭受强烈改造。图幅成果为《河南地质志》编写、河南省地质勘查基金提供了新的基础地质资料支撑，荣获2018年度全国区域地质调查造山带填图区“优秀图幅奖”。
Abstract:The 1∶50 000 geologic map of the Xiaoshui map sheet (I49E016015), Henan Province was prepared by using the digital mapping technology and database building, during which existing geologic and mineral data were fully collected and comprehensively analyzed. The database of this geologic map (also referred to as the Database) is in the format of MapGIS and covers nine stratigraphic units and six stages of magmatic events, which also includes electronic probe data of 70 samples, chemistry testing data of 57 samples, zircon U–Pb dating of 73 samples and whole-rock geochemical data of 147 samples, coming to a total data size of 31.9 MB. Meanwhile, the new mapping theory and methodology based on orogenic belts were adopted to highlight tectonic and lithologic mapping as well as the presentation of special geologic bodies and informal mapping units. In this way, the contents on the map face were expressed in a more scientific, readable and practical manner. In this study, the structure of the North Qinling Orogenic Belt (NQOB) was established, consisting of the Shangnan–Danfeng tectonic belt, Zhu–Xia ophiolitic mélange belt, Qinling microcontinent and Erlangping island arc, a back-arc basin. Following this, it was clear that the Zhu–Xia ophiolitic mélange belt was formed in the early Paleozoic era. Furthermore, the composition and four stages of fold deformations of the Qinling Group were ascertained; the spatial distribution law, protolith and metamorphic era of the high and ultrahigh-pressure rocks in the map sheet area were determined. Thus, revealing that the whole Qinling microcontinent was involved in the early Paleozoic orogen and had undergone great transformation. The achievements of this study have provided new basic geological data for the preparation of the ‘Annals of Geology of Henan Province’ and the projects funded by the ‘Geological Exploration Fund of Henan Province’. Moreover, the 1∶50 000 geologic map of the Xiaoshui map sheet was awarded the ‘Excellent Map Sheet Prize’, among the areas mapped, based on orogenic belts in the national regional geological surveys of China in 2018.
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Key words:
- Database /
- geologic map /
- 1∶50 000 /
- Xiaoshui map sheet /
- ophiolitic mélange belt /
- geological survey engineering /
- Henan Province
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图 1 北秦岭构造带构造地质简图（据Wang H et al., 2011修改）
表 1 数据库（集）元数据简表
条目 描述 数据库（集）名称 河南省小水幅1∶50 000地质图数据库 数据库（集）作者 沉积岩类：郭君功，河南省地质科学研究所
火山岩类：晁红丽，河南省地质调查院
岩浆岩类：赵 焕，河南省地质调查院
变质岩类：翟文建，河南省地质调查院数据时间范围 2016—2019年 地理区域 经纬度：东经 111°30′～111°45′，北纬 33°20′～33°30′ 数据格式 MapGIS 数据量 31.9 MB 数据服务系统网址 http://dcc.cgs.gov.cn 基金项目 河南1∶50 000二郎坪幅等三幅区域地质矿产调查项目（编号：DD20160043−03）和中条—熊耳山成矿区地质矿产调查（编号：DD20160043）联合资助 语种 中文 数据库（集）组成 河南省小水幅1∶50 000地质图数据库包括1∶50 000地质图库和图饰。地质图库包括沉积岩、岩浆岩、火山岩、变质岩、第四系、脉岩、特殊地质体、矿物、构造、地质界线、产状、同位素样品及年龄、岩性花纹、地质代号以及地名、道路、河流、水库等。图饰包括接图表、柱状图、侵入岩单位图、混杂岩带构造岩石单位图、大地构造位置及高压–超高压岩石分布图、地质演化史、地质图切剖面、图例等 
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表 2 雁岭沟岩组地质体面实体属性表
序号 数据项名称 标注编码 数据类型 内容描述实例 1 标识号 *Feature_Id Character AI49E016015000000143 2 原编码 Source_Id Character 3 类型代码 *Feature_Type Character Pt@2y@. 4 名称 Geobody_Name Character 雁岭沟岩组 5 时代 Geobody_Era Character Pt@2 6 下限年龄值/a.B.P Geobody_Age1 Double 7 上限年龄值/a.B.P Geobody_Age2 Double 8 子类型标识 Subtype Interger 1 注：@表示下角标。
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表 3 早白垩世黑云母二长花岗岩侵入岩年代单位属性表
序号 数据项名称 标准编码 数据类型 内容描述实例 1 要素分类（地质代码） *Feature_Type Character ηγβK@1$1 2 岩体填图单位名称 Intru_Body_Name Character 早白垩世黑云母二长花岗岩 3 岩体填图单位符号 Intru_Body_Code Character ηγβK@1$1 4 岩石名称（岩性） Rock_Name Character 黑云母二长花岗岩 5 岩石颜色 Color Character 灰–灰白色 6 岩石结构 Rock_Texture Character 中–粗粒花岗结构，似斑状构造 7 岩石构造 Rock_Structure Character 块状构造 8 岩相 Rock_Phases Character 深成相 9 与围岩接触关系 Contact_Relation Character 侵入接触 10 主要矿物及含量 Primary_Mineral Character 钾长石（30%～40%）、斜长石（25%～40%）、石英（20%～30%） 11 次要矿物及含量 Secondary_Mineral Character 少量黑云母 12 与围岩接触面走向 Strike Integer 135° 13 与围岩接触面倾向 Dip_Direction Integer 325° 14 与围岩接触面倾角 Dip_Angle Integer 48°～80° 15 形成时代 Era Character K@1 16 含矿性 Commodities Character * 17 子类型标识 Subtype Integer 0 注：@表示下角标；$表示上角标。
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Table 1. Metadata Table of Database (Dataset)
Items Description Database (dataset) name 1∶50 000 Geologic Map Database of the Xiaoshui Map Sheet, Henan Province Database (dataset) authors Sedimentary rocks: Guo Jungong, Henan Geological Science Research
Volcanics: Chao Hongli, Henan Institute of Geological Survey
Intrusions: Zhao Huan, Henan Institute of Geological Survey
Metamorphic rocks: Zhai Wenjian, Henan Institute of Geological SurveyData acquisition time 2016 – 2019 Geographic area 111°30′ – 111°45′E, 33°20′ – 33°30′N Data format MapGIS Data size 31.9 MB Data service system URL http://dcc.cgs.gov.cn Fund project Jointly funded by the projects titled ‘1∶50 000-scale Regional Geological and Mineral Survey of Three Map Sheets including Erlangping, Henan Province’ (No.: DD20160043-03) and ‘Geological and Mineral Survey of the Zhongtiao-Xiongershan Metallogenic Area’ (No.: DD20160043) Language Chinese Database (dataset) composition The Database consists of databases of a 1∶50 000 geologic map database and map decorations. The geologic map databases include the data of sedimentary rocks, magmatites, volcanics, metamorphic rocks, the Quaternary, dikes, special geologic blocks, minerals, structures, geologic boundaries, attitude, isotopic samples and ages, lithologic patterns, geologic codes, place names, roads, rivers and reservoirs. The map decorations include index map, histograms, intrusion unit map, lithotectonic unit map of mélange belts, map of geotectonic location and spatial distribution of high and ultrahigh-pressure rocks, history of geological evolution, transverse cutting profiles and legends
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Table 2. Attributes of geologic polygon entities of the Yanlinggou Formation
No. Data item Label code Data type Example of content description 1 ID *Feature_Id char AI49E016015000000143 2 Original code Source_Id char 3 Type code *Feature_Type char Pt@2y@. 4 Name Geobody_Name char Yanlinggou Formation 5 Era Geobody_Era double Pt@2 6 Minimum age Geobody_Age1 double 7 Maximum age Geobody_Age2 int 8 Subtype ID Subtype char 1 Note: @ denotes subscript.
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Table 3. Attributes of a lithochronologic unit of intrusions of the Early Cretaceous bio-monzogranites
No. Data item Standard code Data type Examples of content description 1 Feature type (geologic code) *Feature_Type char ηγβK@1$1 2 Name of rock-mass mapping unit Intru_Body_Name char Early Cretaceous bio-monzogranites 3 Symbol of rock-mass mapping unit Intru_Body_Code char ηγβK@1$1 4 Rock name (lithology) Rock_Name char Bio-monzogranites 5 Rock color Color char Gray – grayish-white 6 Rock texture Rock_Texture char Medium – coarse-grained granite texture and porphyritic structure 7 Rock structure Rock_Structure char Massive structure 8 Lithofacies Rock_Phases char Plutonic facies 9 Contact relationship with surrounding rocks Contact_Relation char Intrusive contact 10 Primary minerals and their content Primary_Mineral char Potash feldspar (30%–40%), plagioclase (25%–40%) and quartz (20%–30%) 11 Secondary minerals and their content Secondary_Mineral char A small amount of biotite 12 Strike of the interface with surrounding rocks Strike int 135° 13 Dip of the contact surface with surrounding rocks Dip_Direction int 325° 14 Dip angle of the contact surface with surrounding rocks Dip_Angle int 48°–80° 15 Formation era Era char K@1 16 Ore-bearing properties Commodities char * 17 Subtype ID Subtype int 0 Note: @ denotes subscript and $ denotes superscript.
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[1] Bader T, Zhang Lifei, Li Xiaowei, Xia Bin, Franz L, Capitani C, Li Qingyun. 2020. High-P granulites of the Songshugou area (Qinling Orogen, east-central China)[J]. Journal of Metamorphic Geology, 38(4): 421−450. doi: 10.1111/jmg.12527
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