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Case Study 12




               Geothermal Attractions and


               Active Volcanoes in China











               Malcolm Cooper                              the Kunlun Group has occurred uniformly for the
                                                           last  40,000  years  at  a  rate  of  1.1cm/yr,  giving  a
                                                           cumulative  offset  of  more  than  400m,  with
               Introduction                                resulting periodic massive earthquakes and volcanic
               The most recent volcanoes of China are distributed   events (70 pyroclastic cones; Seach, 2009).
               generally  in  the  north  and  west  of  the  country   A  newly  discovered  field  is  that  of  Arshan
               (Jilin,  Heilongjiang  Provinces,  Nei  Mongolia,   (Arxan) in Inner Mongolia, 70km from the border
               Tibet)  or  the  south  west  (Hainan,  Qiongzhou   with  Mongolia. The  field  includes  cinder  cones,
               Strait,  Tengchong).  It  is  possible  to  find   pyroclastic sheets and lava flows, with more than
               representatives  of  almost  all  types  of  former   40  cinder  cones  in  the  group. The  most  recent
               volcanic  activity  in  these  areas,  from  basaltic   eruptions  occurred  at Yanshan  cone  (local  relief
               magmatic  eruptions  and  phreatomagmatic   362m),  and  Gaoshan  crater  (140m  deep)  in
               explosions, strato and shield volcanoes, lava cones,   approximately  100  AD.  Basaltic  lava  flows  also
               pyroclastic cones (spatter cones, cinder cones), lava   occurred, creating six lava-dam lakes that are now
               tubes and maars. An interesting feature of Chinese   tourist attractions.
               volcanoes is that they are designated as biosphere   On  a  world-wide  basis  mud  volcanoes  are
               reserves, national parks or, increasingly, national or   remarkably  uncommon,  found  in  only  about  20
               provincial  geoparks.  Several  have  also  been   countries  around  the  world,  and  they  are  highly
               designated Global Geoparks (Table CS12.1). As a   unpredictable.  ‘Erupting’  at  intervals  and  oozing
               consequence they are important tourism resources   streams  of  thick,  sticky  mud  and  flammable  gas,
               in educational and scenic terms, as well as for their   mud  volcanoes  are  a  fascinating  variant  in  our
               current and/or past geothermal activity.    catalogue of volcano-based tourism, and one exists
                                                           in Taiwan in the Southern-most county of Pingtung.
               Geophysical aspects and                     This particular volcano erupts several times a year,
               history of activity                         opening up a fresh crater in a new position each
                                                           time. Mud volcanoes are very common in Azerbaijan
               There are a number of very large volcanic fields in   and  it  is  believed  that  nearly  half  of  the  world’s
               China;  the  Hainan  Dong  on  Hainan  Island,  for   approximately  700  mud  volcanoes  are  located  in
                                  2
               example, covers 4100km . Another example is the   this country (Gallagher, 2003).
               Kunlun  Volcanic  Group  that  stretches  some   On  a  more  traditional  note,  the Tengchong
               1000km  in  Tibet.  The  underlying  geological   area in Yunnan is a large volcanic field located on
               reason  for  this  group  structure  is  the  Kunlun   the border of the Europe-Asia continental plate,
               strike-slip fault that bounds the north side of Tibet.   and  since  1500  AD  there  have  been  over  70
               Left-lateral  motion  along  the  1500km  length  of   earthquakes in the area measuring 5 and over on







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