福建东洋地区地球物理场特征

张振宇; 胡祥云; 王大勇; 陈亮; 王刚; 李永博

doi:10.3799/dqkx.2021.058

福建东洋地区地球物理场特征

doi: 10.3799/dqkx.2021.058

张振宇^{1, 3, ,},
胡祥云^2, ,,
王大勇^{1, 3},
陈亮^{1, 3},
王刚^{1, 3},
李永博^{1, 3}

1.
国家现代地质勘查工程技术研究中心, 河北廊坊 065000
2.
中国地质大学地球物理与空间信息学院湖北武汉 430074
3.
自然资源部地球物理电磁法探测技术重点实验室, 河北廊坊 065000

基金项目:

国家重点研发计划 2016YFC0600210

详细信息

作者简介:
张振宇(1983-), 博士, 高级工程师, 地球物理学专业, 主要从事地球物理方法技术及应用研究.ORCID: 0000-0001-9750-566X.E-mail: zhangzhenyu0214@163.com

通讯作者:
胡祥云, E-mail: xyhu@cug.edu.cn

中图分类号: P618
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- 被引次数: 0
出版历程
- 收稿日期: 2021-03-10
- 网络出版日期: 2021-11-03
- 刊出日期: 2021-11-03

Geophysical Field Characteristics of Dongyang Region, Fujian Province

Zhang Zhenyu^{1, 3
,
,},
Hu Xiangyun^{2
, ,},
Wang Dayong^{1, 3},
Chen Liang^{1, 3},
Wang Gang^{1, 3},
Li Yongbo^{1, 3}

1.
Nation Center for Geological Exploration Technology, Langfang 065000, China
2.
Institute of Geophysics & Geomatics, China University of Geosciences, Wuhan 430074, China
3.
Key Laboratory of Geophysical Electromagnetic Detection Technology of Ministry of Land and Resources, Langfang 065000, China

摘要

摘要: 为了研究东洋地区深部地质结构，在福建东洋地区开展了综合地球物理勘查，对福建东洋地区地球物理场进行了分析，结合已有的地质资料，分析研究了区域地球物理场特征及区域深部地质结构特征.研究认为：福建东洋地区位于巨型环形构造外环带西南部，研究区处在东部沿海磁场剧烈变化带和西部内陆磁场相对平缓带的过渡区域，区域航磁ΔT异常以北东向条带状异常带为主，区内分布有2处剩余重力异常高；地球物理综合剖面范围被两条北西向深大断裂分割为3部分，结合区域地质特征，推断区域南部的浅层是一套推覆无根的变质岩系高阻体，深部为一套以中生代沉积岩石为主的低阻体，区域北部浅部主要为中生代沉积岩夹薄层火山岩组成的低阻体，深部为下古生代和元古界基底岩系共同反应的高阻体，区域中部是火山岩主要发育区.
- 东洋地区 /
- 地球物理场 /
- 深部结构 /
- 金矿 /
- 地球物理
Abstract: In order to study the deep geological structure of Dongyang region, it carried out the integrated geophysical exploration in Dongyang region, analyzed the geophysical field. Combined with the existing geological data, it analyses and studies the characteristics of regional geophysical field and regional deep geological structure. The conclusion is that the Dongyang region is located in the southwest of the outer ring of the giant ring structure. The study area is located in the transition area between the eastern coastal magnetic field violent change zone and the western inland magnetic field relatively gentle zone, and the regional aeromagnetic ΔT anomaly is mainly NE trending banded anomaly zone. There are two high residual gravity anomalies in the study area. The comprehensive geophysical section is divided into three parts by two NW trending deep faults. Combined with regional geological characteristics, it infers that the southern part of the area is a set of nappe rootless metamorphic rock series with high resistivity, the deep part is a set of Mesozoic sedimentary rocks with low resistivity, the shallow part of the northern part of the area is mainly composed of Mesozoic sedimentary rocks with thin volcanic rocks, the deep part is the high resistivity body of the Lower Paleozoic and Proterozoic basement rock series, and the central part of the area is the main development area of volcanic rocks.
- Dongyang region /
- geophysical field /
- deep structure /
- gold mine /
- geophysics

HTML全文

图 1 福建省构造单元综合分区略图

Ⅳ.一级构造; Ⅳ-5.二级构造; Ⅳ-5².三级构造; Ⅳ-5²⁽¹⁾.四级构造; Ⅳ-5^2(1)a.五级构造; 据《中国区域地质志∙福建志》2016版修改

Fig. 1. Outline of comprehensive division of structural units in Fujian Province

下载: 全尺寸图片幻灯片

图 2 福建省构造(断裂)带分布

①为南平-宁化构造岩浆带; ②为郑和-大浦断裂带; ③为福安-南靖NNE向断裂带; ④为滨海断裂带; ⑤为光泽-武平NNE向断裂带; ⑥为崇安-安远NE向断裂带; ⑦为上杭-云霄NW向断裂带

Fig. 2. The distribution of structural (fault) zones of Fujian Province

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图 3 区域及外围航磁ΔT异常等值线平面图

红框表示研究区; 据福建德化双旗山-东洋金矿整装勘查区矿产调查与找矿预测（2019）成果报告修改

Fig. 3. The regional aeromagnetic ΔT anomaly contour map

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图 4 德化-永泰巨型环形火山构造剩余重力异常

Fig. 4. The volcanic tectonic residual gravity anomaly of Dehua-Yongtai giant ring

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图 5 多尺度边界识别及推断线性构造图

上延不同高度Theta图垂向导数

Fig. 5. The Multiscale boundary identification and deduce linear structure diagram

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图 6 上延2 km后和上延8 km后的Theta图垂向导数与推断断裂和区域地球物理剖面位置

Fig. 6. The Theta figure vertical derivative and inferenced fracture of 2 km and 8 km and the location of geophysical profile in Dongyang area

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图 7 剖面相位张量二维偏离角及短轴最小相位

Fig. 7. Two dimensional deviation angle of profile phase tensor and minimum phase of minor axis

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图 8 L1和L2线实测重力剖面与1∶20万区重剩余异常曲线对比

Fig. 8. Comparison of measured gravity profile with gravity residual anomaly curve of 1∶200 000 area of L1 and L2 lines

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图 9 研究区地下等效低密度体三维空间分布

Fig. 9. The three dimensional spatial distribution of equivalent low density body of the study area

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图 10 L1(a)和L2(b)线综合剖面图

Fig. 10. The comprehensive section of line L1 (a) and L2 (b)

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表 1 邱村区块岩、矿石电性参数统计

Table 1. The statistical of electrical parameters of rocks and ores in Qiucun block

岩矿石名称	测定块数	极化率η (%)		电阻率ρ (Ω·m)
岩矿石名称	测定块数	变化范围	常见值	变化范围	常见值
		邱村区块
长林组含砾石英砂岩	31	1.66~4.26	3.05	529~2 641	1 306
长林组石英砂岩	31	2.25~4.08	3.18	311~2 333	969
南园组第二段晶屑熔结凝灰岩	32	0.54~3.80	2.68	633~2 389	1 496
含金多金属矿化石英砂岩	29	3.80~4.49	4.15	1 954~2 364	2 149
		肖板区块
梨山组长石石英砂岩	31	1.19~3.76	1.86	408~3 954	983
大岭组黑云斜长变粒岩	31	1.42~3.87	2.61	810~3 810	2 455
黄铁矿化斜长变粒岩	9	3.96~6.75	5.21	302~3 204	1 324

下载: 导出CSV

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