مقاله انگلیسی رایگان در مورد خسارات غارسنگ مربوط به زمین لرزه – الزویر 2020

 

مشخصات مقاله
ترجمه عنوان مقاله خسارات غارسنگ مربوط به زمین لرزه: مشاهداتی از Mw 7.9 ونچوان، چین
عنوان انگلیسی مقاله Earthquake-related speleothem damages: observations from the 2008 Mw 7.9 Wenchuan, China
انتشار مقاله سال 2020
تعداد صفحات مقاله انگلیسی 41 صفحه
هزینه دانلود مقاله انگلیسی رایگان میباشد.
پایگاه داده نشریه الزویر
نوع نگارش مقاله
مقاله پژوهشی (Research Article)
مقاله بیس این مقاله بیس میباشد
نمایه (index) Scopus – Master Journals List – JCR
نوع مقاله ISI
فرمت مقاله انگلیسی  PDF
ایمپکت فاکتور(IF)
3.913 در سال 2019
شاخص H_index 136 در سال 2020
شاخص SJR 1.454 در سال 2019
شناسه ISSN 0169-555X
شاخص Quartile (چارک) Q1 در سال 2019
مدل مفهومی دارد
پرسشنامه ندارد
متغیر ندارد
رفرنس دارد
رشته های مرتبط عمران، زمین شناسی، ژئوفیزیک
گرایش های مرتبط زلزله، زمین ساخت، سنگ شناسی، زلزله شناسی
نوع ارائه مقاله
ژورنال
مجله  ژئومورفولوژی – Geomorphology
دانشگاه Institute of Environment and Resources, Southwest University of Science and Technology, Mianyang, China
کلمات کلیدی استالاكتيت از میان رفته، غارسنگ آسيب ديده، Speleoseismology، زلزله ونچوان
کلمات کلیدی انگلیسی Fallen stalactite، Damaged speleothem، Speleoseismology، Wenchuan earthquake
شناسه دیجیتال – doi
https://doi.org/10.1016/j.geomorph.2020.107130
کد محصول E14800
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فهرست مطالب مقاله:
Abstract

1- Introduction

2- Geological setting

3- Methods and data

4- Field observations

5- Discussion

6- Conclusions

References

بخشی از متن مقاله:

Abstract

A speleoseismological study has been conducted at over a dozen cave sites along the Longmen Shan fault zone of the eastern Qinghai-Tibet Plateau. The aim was to assess the damage inflicted on speleothems by the Mw 7.9 Wenchuan earthquake. Results show that the earthquake led to either partial or complete collapse of the caves. ‘Soda straws’ are shown to be particularly vulnerable to earthquake damage, but statistical analyses indicate that the spindle and slender shapes are also very likely to break. Cave depth is also shown to play an important role in the fracture development during the earthquake. The measured orientations of fallen stalactites are preferentially aligned to the coseismic surface offset peaks and therefore to the direction of earthquake wave propagation. Several such damaged speleothems resulting from sudden co-seismic movements were observed. The direction of ceiling (hanging wall) movement caused by the Wenchuan earthquake is NW-NNW, consistent with block motion on the footwall of the Yingxiu-Beichuan fault. We inferred that the faults in the caves were not co-seismic structures of the Wenchuan earthquake; but instead they are likely normal faults as the result of gravity creeping induced by the earthquake.

Introduction

Speleothems are cave deposits forming from dripping of mineral -rich water. They are quite common in karst landforms and include stalagmites, stalactites and flowstones , etc . Speleothems are usually regarded as good proxies for high -resolution palaeoclimatic reconstructions, in that carbon and oxygen isotopes preserved in speleothems document climatic oscillations throughout the Quaternary (Wang, 2001; Tan et al., 2006; Fairchild et al., 2006; Calaforra et al., 2008; Sorin et al., 2010) . In tectonically active regions , deposition of speleothems is sometimes interrupted by earthquake s , forming damaged speleothems that are usually called as speleoseismites. Therefore, speleothems have also been used for palaeoseismi c research (Forti, 2001; Lacave et al., 2004; Kagan et al., 2005) and a concise overview of this topic has been given by Forti and Postpichl (1984) and Becker et al., (2006) . Earthquake -related speleoseismites include deformed (broken or offset) (stalactites and stalagmites) (Lemeille et al., 1999; Delaby, 2001; Šebela, 2008) , irregular stalagmite growth (Postpischl et al., 1991; Forti, 2001; Shao et al., 2014; Rajendran et al., 2016) , cave sediment deformation, rock falls in cave s , fault displacement in cave walls and ceilings (Becker et al., 2006; Forti, 2007; Camelbeeck et al., 2012; Camelbeeck et al., 2018) , and the termination and re -initiation of stalagmite growth (Panno et al., 2009; Shao et al., 2014; Panno et al., 2016) .

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