翻开西藏地图,在北纬33——36度、东经83——93度这一辽阔区域内,除了零星的寺庙和极少数居民点外,全是大片大片的“空白”。它所标志的就是被称为“死亡地带”的藏北高原无人区。它的北、西、南三面分别为昆仑山——可可西里山脉、喀喇昆仑山脉和冈底斯——念青唐古拉山脉所环绕,是一个基本 Open Tibet map, in the vast latitude 33--36 degrees, 83-93 degrees east longitude, in addition to sporadic temples and a handful of settlements, all large tracts of “blank.” It marks the so-called “death zone” of the northern Tibet Plateau no man’s land. Its north, west and south sides are surrounded by Kunlun Mountains - Hoh Xil Mountains, Karakoram Mountains and the Gangdise-Nyainqentanglha Mountains respectively. It is a basic