最大有效力矩准则约束下的广西罗阳山地震、地质与地貌效应

张沛全; 李冰溯

最大有效力矩准则约束下的广西罗阳山地震、地质与地貌效应

张沛全^{1, 2,},
李冰溯^{1, 2}

1.
广西壮族自治区地震局, 南宁 530022
2.
广西工程防震研究院, 南宁 530022

基金项目:

广西地震局地震科研监测预报合同制课题 091403

详细信息

作者简介:
张沛全(1978-), 男, 硕士, 工程师, 活动构造、地震地质与构造地质专业。E-mail:zhangpeiquan2007@126.com

中图分类号: P546;P553;P931.2;P315.2;P931.1
计量
- 文章访问数: 181
- HTML全文浏览量: 108
- PDF下载量: 5
- 被引次数: 0
出版历程
- 收稿日期: 2011-12-06
- 刊出日期: 2012-03-01

GEOMORPHOLOGICAL FEATURES IN LUOYANGSHAN AREA, GUANGXI ZHUANG AUTONOMOUS REGION AND ITS RELATIONS WITH THE MAXIMUM EFFECTIVE MOMENT CRITERION

ZHANG Pei-quan^{1, 2
,},
LI Bing-su^{1, 2}

1.
Seismological Bureau of Guangxi Zhuang Autonomous Region, Nanning 530022, China
2.
Guangxi Academy of Engineering Shock Prevention, Nanning 530022, China

摘要

摘要: 使用重新调查后的1936年灵山6¾级地震的烈度资料，结合罗阳山西北麓和南麓的河流地貌与地质构造考察，参考该地区裂变径迹年代学资料，探讨了罗阳山地区的地质力学环境。重新调查后的极震区等烈度区有北北西和北东2个优势方向区域，这2个区域围绕北北西向的泗州断层和北东向的寨圩断层展布。在构造与地貌调查中发现：罗阳山山体有地貌隆升表现，并得到了裂变径迹证据支持；罗阳山西北麓山前冲沟具右旋活动表现；泗州断层内部破裂面的倾向以南西向为优势方向，并具顺时针旋转和高倾角特征。地震分布显示：寨圩断层和泗州断层交汇部位的东南侧有小地震密集展布现象。经分析后认为，以上构造地貌现象是最大有效力矩准则约束下的地震、地质和地貌效应。
- 广西 /
- 罗阳山 /
- 活动构造 /
- 构造地貌 /
- 最大有效力矩准则
Abstract: In this paper, data about the intensity distribution in the meizoseismal area of Lingshan M=6¾ earthquake, geological structure, geomorphologic investigation and fission track dating were used to discuss the geomechanical environment in Lingshan Hill area. In the meizoseismal area, a T-shape Ⅸ+zone coupled NE Zhaixu Fault and NNW Sizhou Fault. Researches on tectonics and geomorphology showed uplifting of Luoyangshan Hill. The data of fission track dating supported this geomorphologic phenomenon. A new channel in front of Luoyangshan Hill (Gaodong) appeared in the west of the old channel. Distribution of earthquakes showed that a lot of low magnitude earthquakes concentratedly occurred in the southeast of the cross zone of NE Zhaixu and NNW Sizhou faults. All above were controlled by the Maximum Effective Moment Criterion (MEMC).
- Guangxi /
- Luoyang Hill /
- active structure /
- geomorphology /
- Maximum Effective Moment Criterion (MEMC)

HTML全文

图 1 罗阳山及周边地区地质略图

Figure 1. Geological outline map of Luoyangshan Hill and surrounding areas

下载: 全尺寸图片幻灯片

图 2 灵山地区地震构造图及1936年6¾级地震烈度分布（根据游象照私人通信材料修改）

F₁—灵山断层；F₂—寨圩断层；F₃—蕉根坪断层；F₄—佛子圩断层；F₅—泗州断层；F₆—松木岭断层；F₇—板露断裂

Figure 2. Seismic structural map of Lingshan Hill area and intensity distribution of Lingshan M=6¾ (1936) earthquake in meizoseismal area

下载: 全尺寸图片幻灯片

图 3 泗州断层构造剖面图（地点：山秀东2 km）

Figure 3. Tectonic profile of Sizhou fault

下载: 全尺寸图片幻灯片

图 4 罗阳山前（高垌）冲沟构造地貌特征图

Figure 4. Geomorphologic map of the channel in front of Luoyangshang Hill, Gaodong

下载: 全尺寸图片幻灯片

图 5 已成为耕植地的老沟沟床（镜头朝北）

Figure 5. Cultivated old gully bed in the front of Luoyangshang Hill, Gaodong

下载: 全尺寸图片幻灯片

图 6 新沟与老沟沟床位置及其规模上的差异

（左：镜头朝西南；右：镜头朝西北；黄色箭头示意新沟位置，白线范围示意老沟范围，白色箭头代表古流向）

Figure 6. Locations of the modern and old channels and the differences of their scales

下载: 全尺寸图片幻灯片

图 7 跌水（左）及其东侧发育在花岗岩里的节理（右）

Figure 7. Waterfall in front of Luoyangshang Hill and joints developed in granite on the east of waterfall

下载: 全尺寸图片幻灯片

图 8 罗阳山地区地震—地质—地貌的力学机制图

Figure 8. Seismology-geology-geomorphology mechanical mechanism at Luoyang Hill area

下载: 全尺寸图片幻灯片

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