Jillian Aira S. Gabo-Ratio, D.Eng.

Associate Professor


Associate Professor
Deputy Director for Academic Affairs (OIC)

Educational Background

D. Eng. in Earth Resources Engineering (2012)
Kyushu University, Japan

MS in Geology (2009)
University of the Philippines

BS Geology (2006)
University of the Philippines

Research Interests

Economic Geology, Igneous Petrology and Geochemistry

Selected Publications

Jabagat, K. D., Gabo-Ratio, J. A. S., Lee, Y.-H., Soberano, O. B., Queaño, K. L., Andal, E. S., Yonezu, K., Dimalanta, C. B., & Yumul Jr, G. P. (2023). Multiple intrusions of barren and fertile magmas in a complex island arc system: Insights from igneous rocks in the Suyoc area, Southern Mankayan Mineral District, Philippines. Journal of Asian Earth Sciences, 257, 105852. https://doi.org/10.1016/j.jseaes.2023.105852

Parcutela, N. E., Austria, R. S., Dimalanta, C. B., Valera, G. T. V., Gabo-Ratio, J. A. S., Payot, B. D., Armada, L. T., Sangalang, K. J. F., & Yumul, G. P. J. (2023). Enhanced arc magmatic productivity of the Western Pacific island arcs deduced from gravity-derived arc crustal growth rates. Frontiers in Earth Science, 11. https://doi.org/10.3389/feart.2023.1107833

Gabo-Ratio, J. A. S., Jabagat, K. D., Soberano, O. B., Yonezu, K., & Lee, Y. H. (2022). Geochemistry and geochronology of intrusive units in the Suyoc epithermal deposit: Constraints on magma fertility in the Mankayan Mineral District, Philippines. IOP Conference Series: Earth and Environmental Science, 1071(1), 012021. https://doi.org/10.1088/1755-1315/1071/1/012021

Jabagat, K. D., Gabo-Ratio, J. A. S., Soberano, O. B., Andal, E. S., Queaño, K. L., Yonezu, K., Dimalanta, C. B., Yumul, G. P., & Lee, Y.-H. (2022, July 15). Episodes of Barren to Fertile Porphyry Copper Deposit Magmatism on a Complex Island Arc System: Insights from the Igneous Host Rocks of the Suyoc Epithermal Prospect, Northern Luzon, Philippines. 2022 Goldschmidt Conference. https://conf.goldschmidt.info/goldschmidt/2022/meetingapp.cgi/Paper/12858

Parcutela, N. E., Dimalanta, C. B., Armada, L. T., Austria, R. S., Gabo-Ratio, J. A. S., & Yumul, G. P. (2022). Band processing of Landsat 8-OLI multi-spectral images as a tool for delineating alteration zones associated with porphyry prospects: A case from Suyoc, Benguet, Philippines. IOP Conference Series: Earth and Environmental Science, 1071(1), 012022. https://doi.org/10.1088/1755-1315/1071/1/012022

Figueroa, A. J. T., & Gabo‐Ratio, J. A. S. (2022). Breccia characteristics and classification of the GW orebodies, Balatoc Diatreme, Philippines: Insights to breccia facies and distribution across diatremes. Resource Geology, 72(1), e12282.

Figueroa, A. J. T., Gabo-Ratio, J. A. S., Manalo, P. C., Takahashi, R., Sato, H., & Ramos, A. B. (2022). Breccia and vein mineralization of the Balatoc Diatreme, Acupan gold deposit, Baguio Mineral District: An example of a diatreme-hosted epithermal deposit in the Philippines. Ore Geology Reviews, 144, 104826.

Zhou, Z., Yonezu, K., Imai, A., Tindell, T., Li, H., & Gabo‐Ratio, J.A.S. (2021). Trace elements mineral chemistry of sulfides from the Woxi Au‐Sb‐W deposit, southern China. Resource Geology, 72(1), e12279.

Chen, W.-H., Yan, Y., Carter, A., Huang, C.-Y., Yumul, G. P., Dimalanta, C. B., Gabo-Ratio, J.A.S., Wang, M.H., Chen, D., Shan, Y., Zhang, X.C., & Liu, W. (2021). Stratigraphy and provenance of the Paleogene syn-rift sediments in central-southern Palawan: Paleogeographic significance for the South China margin. Tectonics, 40, e2021TC006753. https://doi.org/10.1029/2021TC006753

Soberano, O.B., Gabo-Ratio, J.AS., Queaño, K.L., Dimalanta, C.B., Yumul, G.P., Andal, E.S. and Boyce, A.J. 2021. Mineral chemistry, fluid inclusion and stable isotope studies of the Suyoc epithermal veins: Insights to Au-Cu mineralization in southern Mankayan Mineral District, Philippines. Ore Geology Reviews 131, 104035. 

Gabo-Ratio, J.A.S., Buena, A.E., Villaplaza, B.R.B., Payot, B.D., Dimalanta, C.B., Queaño, K.L., Andal, E.S. and Yumul, G.P.Jr. 2020. Epithermal mineralization of the Bonanza-Sandy vein system, Masara Gold District, Mindanao, Philippines. Journal of Asian Earth Sciences: X, p.100041.

Queaño, K.L., Yumul Jr, G.P., Marquez, E.J., Gabo-Ratio, J.A.S., Payot, B.D. and Dimalanta, C.B. 2020. Consumed tectonic plates in Southeast Asia: Markers from the Mesozoic to early Cenozoic stratigraphic units in the northern and central Philippines. Journal of Asian Earth Sciences: X, p.100033.

Jabagat, K.D., Gabo-Ratio, J.A.S., Queaño, K.L., Yonezu, K., Dimalanta, C.B., Lee, Y.H. and Yumul Jr, G.P. 2020. Petrogenetic constraints on magma fertility in the Baguio  Mineral District, Philippines: Probing the mineralization potential of the igneous host rocks in the Sangilo epithermal deposit. Ore Geology Reviews, p.103703.

Yumul Jr, G.P., Dimalanta, C.B., Gabo-Ratio, J.A.S., Queaño, K.L., Armada, L.T., Padrones, J.T., Faustino-Eslava, D.V., Payot, B.D. and Marquez, E.J. 2020. Mesozoic rock suites along western Philippines: Exposed proto-South China Sea fragments?. Journal of Asian Earth Sciences: X, p.100031.

Yumul , G.P.Jr., Armada, L.T., Gabo-Ratio, J.A.S., Dimalanta, C.B., Austria, R.S.P. 2020. Subduction with arrested volcanism: Compressional regime in volcanic arc gap formation along east Mindanao, Philippines. Journal of Asian Earth Sciences: X, 100030. doi.org/10.1016/j.jaesx.2020.100030

Yumul Jr, G.P.Jr., Dimalanta, C. B., Gabo-Ratio, J. A. S., Armada, L. T., Queaño, K. L., & Jabagat, K. D. (2020). Mineralization parameters and exploration targeting for gold–copper deposits in the Baguio (Luzon) and Pacific Cordillera (Mindanao) Mineral Districts, Philippines: A review. Journal of Asian Earth Sciences, 191, 104232.

Rodrigo, J.D., Gabo-Ratio, J.A.S., Queano, K., Fernando, A.G.S., de Silva, L.P., Yonezu, K., Zhang, Y. 2020. Geochemistry of the Late Cretaceous Pandan Formation in Cebu Island, Central Philippines: Sediment contributions from the Australian plate margin during the Mesozoic. The Depositional Record 6, 309-330.

Ratio, M.A.R., Gabo-Ratio, J.A.S., Fujimitsu, Y. 2020. Exploring public engagement and social acceptability of geothermal energy in the Philippines: A case study on the Makiling-Banahaw Geothermal Complex. Geothermics 85, 101774. doi.org/10.1016/j.geothermics.2019.101774.

Yumul, G.P.Jr., Dimalanta, C.B., Salapare, R.C., Queano, K.L., Faustino-Eslava, D.V., Marquez, E.J., Ramos, N.T., Payot, B.D., Guotana, J.M.R., Gabo-Ratio, J.A.S., Armada, L.T., Padrones, J.T., Ishida, K., Suzuki, S. 2020.  Slab rollback and microcontinent subduction in the evolution of the Zambales Ophiolite Complex (Philippines): A review. Geoscience Frontiers 11, 23-36. doi.org/10.1016/j.gsf.2018.12.008

Dimalanta, C.B., Faustino-Eslava, D.V., Gabo-Ratio, J.A.S., Marquez, E.J., Padrones, J.T., Payot, B.D., Queano, K.L., Ramos, N.T., Yumul, G.P.Jr. 2020. Characterization of the proto-Philippine Sea Plate: Evidence from the emplaced oceanic lithospheric fragments along eastern Philippines. Geoscience Frontiers 11, 3-21. doi.org/10.1016/j.gsf.2019.01.005

Li, H., Kong, H., Zhou, Z.-K., Wu, Q.-H., Xi, X.-S., Gabo-Ratio, J.A.S. 2019. Ore-forming material sources of the Jurassic Cu–Pb–Zn mineralization in the Qin–Hang ore belt, South China: Constraints from S–Pb isotopes. Geochemistry 79, 280-306. doi.org/10.1016/j.geoch.2018.12.008.

Buena, A.E., Villaplaza, B.R.B., Payot, B.D., Gabo-Ratio, J.A.S., Ramos, N.T., Faustino-Eslava, D.V., Queaño, K.L., Dimalanta, C.B., Padrones, J.T., Tani, K., Brown, W.W. and Yumul, G.P.Jr. 2019. An evolving subduction-related magmatic system in the Masara Gold District, Eastern Mindanao, Philippines. Journal of Asian Earth Sciences: X. Volume 1, 100007. doi.org/10.1016/j.jaesx.2019.100007.

Ratio, M.A.R., Gabo-Ratio, J.A.S., Tabios-Hillebrecht, A.L. 2019. The Philippine Experience in Geothermal Energy Development. In: A. Manzella, A. Allansdottir, Pellizzone, A. (Eds). Geothermal Energy and Society, pp. 217-238. Springer International Publishing AG, Switzerland.

Sun, H-S., Li, H., Algeo, T.J., Gabo-Ratio, J.A.S., Yang, H., Wu, J.-H., Wu, P. 2019. Geochronology and geochemistry of volcanic rocks from the Tanjianshan Group, NW China: Implications for the early Palaeozoic tectonic evolution of the North Qaidam Orogen. Geological Journal 54, 1769-1796. doi.org/10.1002/gj.3268

Kong, H., Li, H., Wu, Q.-H., Xi, X.-S., Dick, J.M., Gabo-Ratio, J.A.S. 2018. Co-development of Jurassic I-type and A-type granites in southern Hunan, South China: Dual control by plate subduction and intraplate mantle upwelling. Chemie der Erde 78, 500-520. doi: 10.1016/j.chemer.2018.08.002

Villaplaza, B.R.B., Buena, A.E., Pacle, N.A.D., Payot, B.D., Gabo-Ratio, J.A.S., Ramos, N.T., Dimalanta, C.B., Faustino-Eslava, D.V., Queano, K.L., Yumul, G.P.Jr. 2017. Alteration and lithogeochemistry in the Masara gold District, Eastern Mindanao, Philippines, as tools for exploration targeting. Ore Geology Reviews 91, 530-540. doi: 10.1016/j.oregeorev.2017.09.004

Wu, J-H., Li, H., Xi, X-S., Kong, H., Wu, Q-H., Peng, N-L., Wu, X-M., Cao, J-Y., Gabo-Ratio, J.A.S. 2017. Geochemistry and geochronology of mafic dikes in the Taipusi area, northern margin of North China Craton: Implications for Silurian tectonic evolution of the Central Asian Orogen. Journal of Earth System Science 126:64. doi: 10.1007/s12040-017-0841-z

 Li, H., Sun, S-H., Wu, J-H., Evans, N.J., Xi, X-S., Peng, N-L., Cao, J-Y., Gabo-Ratio, J.A.S. 2017. Re–Os and U–Pb geochronology of the Shazigou Mo polymetallic ore field, Inner Mongolia: Implications for Permian–Triassic mineralization at the northern margin of the North China Craton. Ore Geology Reviews 83, 287-299. doi: 10.1016/j.oregeorev.2016.12.010

Li, H., Xi, X., Sun, H., Kong, H., Wu, Q., Wu, C., Gabo-Ratio, J.A.S. 2016. Geochemistry of the Batang Group in the Zhaokalong Area, Yushu, Qinghai: Implications for the Late Triassic Tectonism in the Northern Sanjiang Region, China. Acta Geologica Sinica 90, 704-721. doi: 10.1111/1755-6724.12699

Gabo, J.A.S., Dimalanta, C.B., Yumul, G.P. Jr., Faustino-Eslava, D.V. Imai, A. 2015. Terrane boundary geophysical signatures in Northwest Panay, Philippines: Results from gravity, seismic refraction and electrical resistivity investigations. Terrestrial, Atmospheric and Oceanic Sciences 26, 663-678. doi: 10.3319/TAO.2015.05.11.03(TC)

Budinov, Z., Yonezu, K., Tindell, T.D., Gabo, J.A.S., Milutinovic, S., Boyce, A.J., Watanabe, K. 2015. Copper-gold skarn mineralization at the Karavansalija Ore Zone, Rogozna Mountain, Southwestern Serbia.  Resource Geology 65, 328-344. doi: 10.1111/rge.12075

Haryanto, A.D., Rosana, M.F., Tindell, T.D., Gabo, J.A.S., Yusuf, H., Yonezu, K. 2015. Alteration, ore mineralogy, and fluid inclusion microthermometry of the Rorah Kadal Quartz Vein in Cibaliung Goldfield, Western Java, Indonesia. ASEAN Engineering Journal, Part C, 4, No. 2.

Gabo, J.A.S., Dimalanta, C.B., Asio, M.G.S., Queaño, K.L., Yumul, G.P. Jr., Imai, A. 2009. Geology and geochemistry of the clastic sequences from Northwestern Panay (Philippines): Implications for provenance and geotectonic setting. Tectonophysics, Tectonophysics 479, 111-119. doi: 10.1016/j.tecto.2009.02.004

 Zamoras, L.R., Montes, M.G.A., Queaño, K.L., Marquez, E.J., Dimalanta, C.B., Gabo, J.A.S., Yumul Jr., G.P., 2008. The Buruanga Peninsula and the Antique Range: two contrasting terranes in Northwest Panay, Philippines featuring an arc-continent collision zone. Island Arc 17, 443–457.

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