馬泉河藏語རྟ་མཆོག་གཙང་པོ/རྟ་མཆོག་ཁ་འབབ威利轉寫rta mchog gtsang po / rta mchog kha 'bab,漢語音譯當卻藏布當卻喀撥)是雅魯藏布江上游、桑木張以下的河段,由傑馬雍宗曲庫比藏布馬攸藏布匯聚而成。傑馬雍宗曲是雅魯藏布江的正源,發源於中、尼邊境喜馬拉雅山北麓的昂色洞冬冰川[1],其源頭為位於中國西藏阿里地區普蘭縣的名為昂色東東的溪流,源頭坐標30°22′06″N 82°03′20″E,源頭海拔高程5319.7米。[2],流經仲巴縣境內時稱「瑪藏河」,平均海拔超過5200米。流淌在岡底斯山(北)與喜馬拉雅山(南)之間,水流平緩,河谷開闊,江心湖和汊流發育。

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1962年西藏喜馬拉雅山脈馬泉河畔

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