+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Porphyry-epithermal relationships in the Baguio District, Philippines; telescoping of low sulfidation mineralisation by transpressional uplift and erosion

, : Porphyry-epithermal relationships in the Baguio District, Philippines; telescoping of low sulfidation mineralisation by transpressional uplift and erosion. Abstracts with Programs - Geological Society of America 28(7): 155

The Central Cordillera in northern Luzon, Philippines, is an important porphyry Cu-Au and epithermal Au mineral province. Several large low sulfidation epithermal deposits occur in the Baguio mineral district, situated at the southern end of the Cordillera in a restraining bend of the Philippine Fault system. At the Acupan gold mine, 0.65 Ma low sulfidation epithermal gold mineralisation has overprinted 2.4 Ma porphyry Cu-Au mineralisation. Telescoping of epithermal mineralisation onto the older porphyry system at Acupan was favoured by high uplift rates, related to transpressional uplift of segments of the Central Cordillera, combined with high erosion rates associated with the monsoonal climate. Denudation of the local topography was exacerbated at Acupan by the emplacement and subsequent partial removal of a phreatomagmatic vent/diatreme complex prior to epithermal vein formation. Stable isotope and fluid inclusion data has shown that sulfur and carbon in the epithermal veins were magmatically-derived, whereas most of the solutes and water were of meteoric origin. However, there was no direct input of magmatic-hydrothermal fluids from the porphyry system into the low salinity epithermal vein system. Superposition of porphyry and epithermal mineralisation in the Central Cordillera was a result of the combination of rapid transpressional uplift and high erosion rates, and is likely to have been a more common telescoping mechanism in the Western Pacific than catastrophic unroofing of a volcano by sector collapse (eg. Lihir).


Other references

Ito, M.; Hamako, J.; Sakurai, Y.; Matsumoto, M.; Fujimura, Y.; Suzuki, M.; Hashimoto, K.; Titani, K.; Matsui, T., 2001: Complete amino acid sequence of kaouthiagin, a novel cobra venom metalloproteinase with two disintegrin-like sequences. The primary structure of kaouthiagin, a metalloproteinase from the venom of the cobra snake Naja kaouthia which specifically cleaves human von Willebrand factor (VWF), was determined by amino acid sequencing. Kaouthiagin is composed of 401 amino a...

Umeda P.K.; Zak R.; Rabinowitz M., 1980: Purification of messenger rna for fast and slow myosin heavy chains by indirect immuno precipitation of polysomes from embryonic chick skeletal muscle. Fast and slow myosin heavy chain mRNA were isolated by indirect immunoprecipitation of polysomes from 14 day old embryonic chick leg muscle. The antibodies were prepared against myosin heavy chains purified by NaDodSO4[sodium dodecylsulfate]-polya...

Noack, C.H., 1960: A death from overdosage of "tofranil". Medical Journal of Australia 47(2): 182-182

Tan,W.B.; Khang,T.F.; Lim,L.H.S., 2010: Morphometric analysis of Trianchoratus Price Berry, 1966 from Channa spp of Peninsular Malaysia. The morphometric data of anchors of 448 specimens belonging to four species of <i>Trianchoratus</i> Price & Berry, 1966, from <i>Channa lucius</i> (Cuvier) and <i>C. striata</i> (Bloch) were statistically analys...

Graser, E.; Verma, S.; Rosenberg, N., 1985: The roughness sublayer over a wide-row crop. 17th Conference on Agricultural and Forest Meteorology and seventh Conference on Biometeorology and Aerobiology May 21-24-1985 Scottsdale Ariz: preprint volume sponsored by the American Meteorological Society: 126

Hyun, C.K.e; Shin, H.K.l, 1998: Utilization of bovine blood plasma obtained from a slaughterhouse for economic production of probiotics. The growth of a probiotic-strain of Lactobacillus sp. in a bovine blood plasma-based medium and its stability against the freeze-drying process were investigated. Nitrogen sources in a complex (MRS) medium were replaced by the enzymatic hydrolysat...

Hoshino, K.; Ueda, Y.; Hirotaka, T., 2009: Apparent dielectric constants of brines estimated from quartz solubilities. Geochimica et Cosmochimica Acta 73.13S: A552

Liddo, S., 1934: Osservazioni parasitologiohe nella regione pugliese. Archivio Italiano di Scienze Mediche Coloniali Rome, 15: 298-300

Julian, D.G., 1984: A complex matter. European Heart Journal 5(6): 513-514

Mertens, R., 1957: Ein neuer melanistischer Waran aus dem sudlichen Australien.. Zoologischer Anzeiger, 159: 17-20