Geology and Metallogenetic Setting of the Habo Porphyry Cu (MoAu) Deposit,Yunnan
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Abstract:
Habo porphyry Cu (MoAu) deposit, located in west of southern AilaoshanRed River Cenozoic metallogentic belt, is a newlydiscovered deposit. The Habo intrusion complex cropping out in this district is characterized with multiple intrusions. Granite based on this intrusion sequence can be divided into Pingshan granite, Sandaoban granite, Ashu granite and Habo South granite intrusion (c. 37.3 Ma), then followed by four porphyries intruding into the Habo South granite, i.e. biotieKfeldspar porphyry, quartzKfeldspar porphyry, quartzmonzonitic porphyry and later biotieKfeldspar porphyry dykes. LAICPMS UPb dating of zircons from biotieKfeldspar porphyry and quartzmonzonitic porphyry yields ages of c. 36.20±0.20 Ma and c. 36.19±0.22 Ma, respectively. The Habo South granite intrusion and four stages of porphyry are of the similar geochemical features (high K and alkaline, high oxidization and arc granite) as the porphyry belt in Eastern Tibet, indicating that both have a same origin. ReOs dating of molybdenum mineralization shows an age of c. 35.47±0.16Ma for the Habo deposit. The extremely similar intrusive age may suggest that diagenesis and mineralization in the Habo deposit was a continuous magmatic hydrothermal process, similar to the Yulong porphyry copper deposit. Basing on the lithological and geochemical characteristics of the Habo deposit, the authors in combination with previous research results in this area believe that the alkaline porphyry deposit in eastern Tibet is the extension of Yulong metallogenic belt and the product in a latecollisional transform regime in Eastern Tibet.
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ZHU Xiangping,,MO Xuanxue,,Noel C. WHITE,,ZHANG Bo,,SUN Mingxiang,,WANG Shuxian,,ZHAO Sili,,YANG Yong.2009. Geology and Metallogenetic Setting of the Habo Porphyry Cu (MoAu) Deposit, Yunnan[J]. Acta Geologica Sinica,83(12):1915-1928