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The Altun–Qilian–Kunlun orogenic system in the northern Tibetan Plateau is considered as the northernmost orogenic collage of the proto-Tethyan domain. Early Paleozoic polyphase tectonothermal events related to the subduction of the proto-Tethyan ocean and subsequent collisional orogeny produced two dominant metamorphic belts: the North Altun (NAT)–North Qilian (NQL) HP/LT metamorphic belt, and south...
Eclogites discovered in the eastern part of the East Kunlun Mountains, Western China, are primarily composed of garnet+omphacite+quartz+rutile. The garnets show end-member components of 48–55% almandine, 1–2% spessartine, 19–29% grossularite and 16–29% pyrope, and the omphacite has a jadeite content of 21–63%. The peak-metamorphic assemblage of eclogites records a P–T condition of >1.6GPa and 590°C–650°C...
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