کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5780744 1635355 2017 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Recent ground fissures in the Hetao basin, Inner Mongolia, China
ترجمه فارسی عنوان
فرسایش زمین های اخیر در حوضه Hetao، مغولستان داخلی، چین
کلمات کلیدی
حوزه حتا؛ شکاف زمین؛ گسل فعال؛ کاهش آب های زیرزمینی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی


- New ground fissures in China's Hetao basin have been found.
- The ground fissures emerged along the pre-existing Sertengshan piedmont fault.
- The modern extensional tectonic environment improved the emergence of the ground fissures.
- The over-extraction of groundwater induced the development of these ground fissures.

Ground fissures are a geological hazard with complex formation mechanisms. Increasing amounts of human activity have created more ground fissures, which can destroy buildings and threaten human security. Some ground fissures indicate potentially devastating earthquakes, so we must pay attention to these hazards. This paper documents recently discovered ground fissures in the Hetao basin. These ground fissures are located along the frontal margins of the terraces of the Sertengshan piedmont fault. These fissures are 600-1600 m long, 5-50 cm wide, and at most 1 m deep. These ground fissures emerged after 2010 and ruptured newly constructed roads and field ridges. The deep geodynamic mechanisms within this extensional environment, which is dominated by NE-SW principal compressive shear, involve N-S tensile stress, which has produced continuous subsidence in the Hetao basin and continuous activity along the Sertengshan piedmont fault since the late Quaternary. Trenches across the ground fissures reveal that the fissures are the latest manifestation of the activity of preexisting faults and are the result of creep-slip movement along the faults. The groundwater level in the Hetao basin has been dropping since the 1960s because of overexploitation, resulting in subsidence. When the tensile stress exceeds the ultimate tensile strength of the strata, the strata rupture along preexisting faults, producing ground fissures. Thus, the Sertengshan piedmont fault planes are the structural foundation of the ground fissures, and groundwater extraction induces the development of ground fissures.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geomorphology - Volume 295, 15 October 2017, Pages 102-114
نویسندگان
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