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Baima, Taihe |
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Sichuan, China |
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Fe Ti V
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Super Porphyry Cu and Au
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The Baima and Taihe titaniferous magnetite deposits are located in Sichuan Province, south-western China.
The deposit occurs within the Panzhihua-Xichang (Pan-Xi) intra-continental rift on the Yangtze Platform, and is hosted by a sill like layered basic-ultrabasic (gabbroic) complex.
The Baima layered intrusion is a member of the extensive 260 Ma Lower Emeishan Igneous Province and flood basalts of SW China.
The Baima intrusion is predominantly composed of gabbros and troctolites, and is ~24 km long and ~2 km thick. It dips at 50 to 70°W, and was emplaced into Neoproterozoic dolomitic limestones and Cambrian clastic sediments. Large marble and schist xenoliths are common. The intrusion was, in turn, cut by younger syenites and granites, whilst pegmatitic gabbros occur in places at the base of the intrusion. It has been divided into Lower and Middle zones. Unlike the mafic layered Panzhihua intrusion, also in the Emeishan Igneous Province, no massive Fe-Ti oxide layers are found at Baima. However, important Fe-Ti-V oxide mineralisation occurs as magnetite-rich troctolite layers in the lower zone of the intrusion.
Baima is to the north of the large Panzhihua and Hongge deposits, which are the subject of separate records in this database.
No production has been recorded from Baima (2006), when the deposit was still at the prospect stage.
Reserves are quoted by Rundqvist, et al., Vernadsky SGM, Moscow as:
1152 Mt @ 27.75% Fe.
The Taihe intrusion is located ~65 km north of Baima. It is ~3 km long, ~2 km wide and ~1.2 km thick, dipping at 50 to 60°SE. Diopside-garnet altered marble xenoliths are common within the intrusion (Panxi Geological Unit, 1984). The immediate surrounding country rocks are temporally equivalent 261 ±2 Ma syenites (Xu et al., 2008). The main Taihe intrusion is further divided into Lower, Middle and Upper Zones. Important Fe-Ti oxide mineralisation occurs as Fe-Ti oxide-rich layers throughout the intrusion as well as a thick massive oxide layer in the upper part of the Lower Zone. In contrast to the Panzhihua, Baima and Hongge intrusions, all related to the Emeishan Igneous Province, where abundant apatite occurs most commonly in their upper zones, the Taihe intrusion has similar abundant apatite, but in its middle zone as well as its upper zone (She et al., 2014).
The most recent source geological information used to prepare this decription was dated: 2015.
This description is a summary from published sources, the chief of which are listed below.
© Copyright Porter GeoConsultancy Pty Ltd. Unauthorised copying, reproduction, storage or dissemination prohibited.
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Selected References:
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Shellnutt, J.G., Ma, G,S.-K. and Qi, L., 2014 - Platinum-group elemental chemistry of the Baima and Taihe Fe-Ti oxide bearing gabbroic intrusions of the Emeishan large igneous province, SW China: in Geochemistry (Chemie der Erde) v.75, pp. 35-49.
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Tang, Q., Li, C., Liu, C., Xue, S.,Xu, S., Zhang, Y., Li, Z., Bao, J. and Song, H., 2023 - Contrasting magmatic controls on the genesis of Fe-Ti-V oxide deposits in the Emeishan large igneous province using apatite Sr-Nd isotopes and apatite-zircon trace elements: in Mineralium Deposita v.58, pp. 1279–1296. doi.org/10.1007/s00126-023-01180-0.
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Yu, S.-Y.,Song, X.-Y., Ripley, E.M., Li, C., Chen, L.-M., She, Y.-W. and Luan, Y., 2015 - Integrated O-Sr-Nd isotope constraints on the evolution of four important Fe-Ti oxide ore-bearing mafic-ultramafic intrusions in the Emeishan large igneous province, SWChina: in Chemical Geology v.401, pp. 28-42.
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Porter GeoConsultancy Pty Ltd (PorterGeo) provides access to this database at no charge. It is largely based on scientific papers and reports in the public domain, and was current when the sources consulted were published. While PorterGeo endeavour to ensure the information was accurate at the time of compilation and subsequent updating, PorterGeo, its employees and servants: i). do not warrant, or make any representation regarding the use, or results of the use of the information contained herein as to its correctness, accuracy, currency, or otherwise; and ii). expressly disclaim all liability or responsibility to any person using the information or conclusions contained herein.
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