(中國地質(zhì)大學(xué)地球科學(xué)學(xué)院， 武漢 430074)
摘 要: 羅布莎豆莢狀鉻鐵礦床產(chǎn)于高度部分熔融和動力重熔的變質(zhì)橄欖巖中。地 幔剪切帶不僅控制了鉻鐵礦的分布，而且為鉻鐵礦的形成提供了熱 動力和構(gòu)造動力。 該鉻鐵礦床是在晚中生代巖石圈伸展和地幔隆升的構(gòu)造背景下，由部分 熔 融、剪切流 變、動力重熔、剪切破裂等多種動力成礦方式綜合作用下形成的遞進(jìn)改造式地幔動力礦床。
關(guān)鍵字: 地幔剪切帶 動力成礦 豆莢狀鉻鐵礦 羅布莎
（Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074）
Abstract:The Luobusha podiform chromites locate at metamorphic peroditites that show partial melting and dynamic remelting. The mantle shear zones not only control distribution of the chromites, but also provide heat souce and tectonic dynamics. The chromites are progressive reworking type mantle deposits formed by shear flow, partial melting, shear fracture and dynamic remelting in the tectonic setting of Mesozoic lithospheric extension and mantle uplife .
Key words: mantle shear zone dynamic mineralization podiform chromite Luobusha
