Dongqiao, Tibet
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Dongqiao () is a village in
Amdo County Amdo County (; ) is a county within Nagqu of the Tibet Autonomous Region of China. The county covers an area of 43,410.85 square kilometres and is dominated by mainly by Tibetan grassland. In 2000 it had a population of 32,843 . Its capital is ...
of
Nagqu Prefecture Nagqu (also Naqu, Nakchu, or Nagchu; ; ) is a prefecture-level city in the north of the Chinese autonomous region of Tibet. On May 7, 2018, the former Nagqu Prefecture was officially declared the sixth prefecture-level city in Tibet after Lhasa, ...
,
Tibet Autonomous Region The Tibet Autonomous Region or Xizang Autonomous Region, often shortened to Tibet or Xizang, is a province-level autonomous region of the People's Republic of China in Southwest China. It was overlayed on the traditional Tibetan regions of à ...
, People's Republic of China. The village of Dongqiao is noted for its hot spring, Jipu. Dongqiao geologically gives its name to the wider Dongqiao-Nagqu Subregion and the Banggong-Dongqiao-Nujiang fault zone.


Geography and geology

Dongqiao is located about west of
Amdo Town Pana, or Pagnag (), also known as Anduo, or Amdo, is a town and the seat of Amdo County in the Nagqu Prefecture of the Tibet Autonomous Region, in China. It lies 464 kilometres north of Lhasa and 138 km north of Nagqu. As of 2004 its jurisdic ...
. It is located several kilometres to the south of Qiangma and Zigetangcuo Lake, to the northeast of Dongqiacuo lake at an altitude of about . The Nu River, also known as the Nujiang River flows nearby forming a valley and the Nutiang River also flows nearby. A small valley is located southeast of Dongqiao. Dongqiao village gives its name to a large region which it is located in which is known geologically for its
ophiolite An ophiolite is a section of Earth's oceanic crust and the underlying upper mantle that has been uplifted and exposed above sea level and often emplaced onto continental crustal rocks. The Greek word ὄφις, ''ophis'' (''snake'') is found ...
, termed the "Dongqiao ophiolite belt", which is dated to the late
Jurassic The Jurassic ( ) is a geologic period and stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The Jurassic constitutes the middle period of ...
to early
Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of ...
age. The Jurassic age formations form three distinct geological regions to the north of
Lhasa Lhasa (; Lhasa dialect: ; bo, text=ལྷ་ས, translation=Place of Gods) is the urban center of the prefecture-level Lhasa City and the administrative capital of Tibet Autonomous Region in Southwest China. The inner urban area of Lhas ...
, from north to south the Dongqiao-Nagqu Subregion, the Doilungdeqen-Lhunzhub Subregion and the Sangri Subregion. The northern boundary is known as the Banggong-Dongqiao-Nujiang fault zone or Bangongcuo-Dingqing fault zone, which divides it from the Qiangtang Terrane to the north beyond this. Towards the end of the Jurassic period, the ophiolite became covered by chromitite. As Guangcen Li puts it in a 1990 paper, "the ophiolites appear to be covered in turn by a transgressive marine detrital Upper Jurassic to lower most Cretaceous series." The Chinese Academy of Geological Sciences has conducted studies in the area, identifying "diamond orebodies of diamondiferous ultrabasic rock type in Dongqiao and Lhobsa of Amdo County, northern Tibet." The village of Dongqiao is noted for its hot spring, Jipu.


Economy

Due to its geological background, Dongqiao is also a known mining spot, containing the Dongfeng Chrome Mine.


References

{{Nagqu Prefecture Populated places in Tibet Amdo County