PAPERS
WRITING ~NOW
Wang, J., Kapp, P., He, J., Holder, R., Hernández-Uribe, D., Worthington, J.R., under review. Polycyclic metamorphism and exhumation of subduction complex rocks, Cedros Island, Baja California. Submitted to Geological Society of America Bulletin.
Worthington, J.R., Chin, E., and Palin, R., in-prep c. Hydration state of the Colorado Plateau lower crust from water content in xenoliths. For submission to Earth and Planetary Science Letters.
Worthington, J.R., Bold, U., Bucholz, C.E., Crowley, J.L., Macdonald, F., Löwe, G., and Erdene, A., in-prep b. Early geological evolution of the Central Asian orogenic system, Mongolia: 2. Cryogenian–Ordovician tectonics of the ophiolitic Bayankhongor suture. For submission to Journal of the Geological Society.
Worthington, J.R., Bucholz, C.E., and Erdene, A., in-prep a. Early geological evolution of the Central Asian orogenic system, Mongolia: 1. Petrology and oceanic-plateau origin of the Cryogenian Bayankhongor ophiolite. For submission to Journal of the Geological Society.
PUBLISHED
2024
Worthington, J.R., Chin, E.J., and Palin, R.M., 2024. Metasomatism of the continental crust and its impact on surface uplift: Insights from reactive transport modeling. Journal of Metamorphic Geology. doi: 10.1111/jmg.12772. [ link ]
2021
Scoggin, S.H., Reiners, P.W., Shuster, D.L., Davis, G.H, Ward, L.A., Worthington, J.R., Nickerson, P.A., and Evenson, N.S., 2021. (U-Th)/He and 4He/3He thermochronology of secondary oxides in faults and fractures: A regional perspective from southeastern Arizona. Geochemistry, Geophysics, Geosystems. doi: 10.1029/2021GC009905. [ link ]
2020
Villarreal, D., Robinson, A.C., Carrapa, B., Worthington, J.R., Chapman, J.B., Oimahmadov, I., Gadoev, M., and MacDonald, B., 2020. Sedimentological evidence for Late Triassic crustal suturing of the Central and Southern Pamir. Journal of Asian Earth Sciences. doi: 10.1016/j.jaesx.2019.100024 [ link ]
Worthington, J.R., Ratschbacher, L., Stübner, K., Khan, J., Malz, N., Schneider, S., Kapp, P., Chapman, J.B., Stevens Goddard, A., Brooks, H.L., Lamadrid, H., Steele-MacInnis, M., Rutte, D., Johckheere, R., Pfänder, J., Hacker, B.R., Oimahmadov, I., and Gadoev, M., 2020. The Alichur dome, South Pamir, western India‒Asia collisional zone: detailing the Neogene Shakhdara–Alichur syn-collisional gneiss-dome complex and connection to lithospheric processes. Tectonics. doi: 10.1029/2019tc005735 [ link ]
2019
Chapman, J.B., Carrapa, B., Decelles, P.G., Worthington, J.R., Mancin, N., Cobianchi, M., Stoica, M., Wang, X., Gadoev, M., and Oimahmadov, I., 2019. The Tajik Basin: a composite record of sedimentary basin evolution in response to tectonics in the Pamir. Basin Research. doi: 10.1111/bre.12381 [ link ]
2018
Chapman, J.B., Robinson, A.C., Carrapa, B., Villarreal, D., Worthington, J.R., DeCelles, P.G., Kapp, P., Gadoev, M., Oimahmadaov, I., and Gehrels, G., 2018. Cretaceous shortening and exhumation in the South Pamir terrane. Lithosphere, v. 10, no. 4, p. 494–511. doi: 10.1130/L691.1 [ link ]
Chapman, J.B., Scoggin, S., Kapp, P., Carrapa, B., Ducea, M.N., Worthington, J.R., Oimahmadov, I., Gadoev, M., 2018. Mesozoic to Cenozoic magmatic history of the Pamir. Earth and Planetary Science Letters, v. 482, p. 181–192. doi: 10.1016/j.epsl.2017.10.041 [ link ]
Zanchetta, S., Worthington, J.R., Angiolini, L., Leven, E.J., Villa, I.M., and Zanchi, A., 2018. The Bashgumbaz Complex (Tajikistan): Arc obduction in the Cimmerian orogeny of the Pamir. Gondwana Research, v. 57, p. 170–190. doi: 10.1016/j.gr.2018.01.009 [ link ]
2017
Chapman, J., Carrapa, B., Ballato, P., DeCelles, P., Worthington, J., Oimahmadov, I., Gadoev, M., and Ketcham, R.A., 2017. Intracontinental subduction beneath the Pamir Mountains: Constraints from thermokinematic modeling of shortening in the Tajik fold-and-thrust belt. Geological Society of America Bulletin, v. 129, no. 11–12, p. 1450–1471. doi: 10.1130/B31730.1 [ link ]
Worthington, J.R., Kapp, P., Minaev, V., Chapman, J.B., Mazdab, F.K., Ducea, M.N., Oimahmadov, I., and Gadoev, M., 2017. Birth, life, and demise of the Andean–syn-collisional Gissar arc: Late Paleozoic tectono-magmatic-metamorphic evolution of the southwestern Tian Shan, Tajikistan. Tectonics, v. 36, no. 10, p. 1861–1912. doi: 10.1002/2016tc004285 [ link ]
2016
Angiolini, L., Campagna, M., Borlenghi, L., Grunt, T., Vachard, D., Vezzoli, G., Vuolo, I., Worthington, J.R., Nicora, A., and Zanchi, A., 2016. Brachiopods from the Cisuralian–Guadalupian of Darvaz, Tajikistan and implications for Permian stratigraphic correlations. Palaeoworld, v. 25, no. 4. doi: 10.1016/j.palwor.2016.05.006 [ link ]
< 2016
Worthington, J.R., Hacker, B.R., and Zandt, G., 2013. Distinguishing eclogite from peridotite: EBSD-based calculations of seismic velocities. Geophysical Journal International, v. 193, no. 1, p. 489–505. doi: 10.1093/gji/ggt004 [ link ]
ACKNOWLEDGMENT
2024
Gauna, C. and Sternes, P.C., 2024. Novel aerial observations of a possible newborn white shark (Carcharodon carcharias) in Southern California. Environmental Biology of Fishes. doi: 10.1007/s10641-024-01512-7 - [ link ]
2010
Perroy, R.L., Bookhagen, B., Asner, G.P., and Chadwick, O.A., 2010. Comparison of gully erosion estimates using airborne and ground-based LiDAR on Santa Cruz Island, California. Geomorphology. doi: 10.1016/j.geomorph.2010.01.009 - [ link ]
THESES
PhD Dissertation (UA): Paleozoic–Cenozoic Tectonics of Central Asia.
Undergraduate Senior Honors Thesis (UCSB): Distinguishing Eclogite from Peridotite: EBSD-based Calculations of Seismic Velocities.
CONFERENCE PRESENTATIONS
2025
Connop, C.H., Holder, R.M., Xu, Y., Neumann, S.R., Hernandez-Uribe, D., Wang, J.W., Kapp, P.A., Worthington, J., and He, J., 2025. Early Metamorphism of High-Grade Blocks from the Subduction Mélange of Cedros Island, Baja California, Mexico: Insights from Garnet Lu-Hf Geochronology. GSA Abstracts With Programs, v. 57, No. 6 (2025AM-9764)
Muller, J.K., Ruwe, R., Varley, N., Rodriguez Delgado, M., Reyes Torres, A., Worthington, J.R., Chin, E.J., 2025. Newly identified hydromagmatic volcaniclastics of Isla Guadalupe, Mexico. International Association of Volcanology and Chemistry of the Earth’s Interior Scientific Assembly 2025 (Geneva).
Heavey, K., Chin, E., Worthington, J.R., Muller, J., and Wang, K., 2025. Petrographic Atlas of Volcanism on Guadalupe Island, Mexico. 2025 Mesa College Research Conference (San Diego).
Wang, J., Hernández Uribe, D., Holder, R., Kapp, P., He, J., and Worthington, J.R., 2025. Polycyclic metamorphism and exhumation of subduction complex rocks, Cedros Island, Baja California. GSA 2025 Cordilleran Section Meeting (Sacramento, CA), GSA Abstracts With Programs, v. 57, No. 4 (2025CD-409385).
2024
Constable, C., Chin, E.J., Sweet, M., and Worthington, J.R., 2024. The Scripps-GEO Scholars program: a midterm perspective. AGU 2024 Fall Meeting (Washington, DC), (ED43A-08).
2019
Worthington, J.R., Bucholz, C.E., Bold, U., Macdonald, F., and Löwe, G., 2019. Neoproterozoic tectonic evolution of the ophiolitic Bayankhongor suture zone, Central Asian Orogenic Belt (Central Mongolia). GSA 2019 Annual Meeting (Phoenix), GSA Abstracts with Programs, v. 51, 5 (334401)
Worthington, J.R., Ratschbacher, L., Stübner, K., Khan, J., Malz, N., Schneider, S., Kapp, P., Chapman, J.B., Stevens Goddard, A., Brooks, H.L., Lamadrid, H., Steele-MacInnis, M., Rutte, D., Johckheere, R., Pfänder, J., Hacker, B.R., Oimahmadov, I., and Gadoev, M., 2019. The Alichur dome, South Pamir, western India‒Asia collisional zone: detailing the Neogene Shakhdara–Alichur syn-collisional gneiss-dome complex and connection to lithospheric processes. 34th Himalaya–Karakoram–Tibet Workshop. Bozeman, MT, USA.
2017
Chapman, J.B., Scoggin, S., Kapp, P., Carrapa, B., Ducea, M.N., Worthington, J., Oimahmadov, I., and Gadoev, M., 2017. Magmatic evidence for localized lithospheric delamination resulting from continental collision in the Pamir-Tibet orogen. GSA 2017 Annual Meeting (Seattle), GSA Abstracts with Programs, v. 47, 7-39 (305706).
Villareal, D., Robinson, A.C., Worthington, J.R., Chapman, J.B., Carrapa, B., Oimahmadov, I., Macdonald, B., and Gadoev, M., 2017. Sedimentological evidence for early Mesozoic crustal suturing of the Pamir. GSA 2017 Annual Meeting (Seattle), GSA Abstracts with Programs, v. 49, 6 (303094).
Zhong, L., Wang, B. Liu, H., Kapp, P., Worthington, J.R., Cao, Y., and He, Z., 2017. The mid–lower-crustal Chinese Central Tianshan: Implications for continental growth and accretionary orogenesis. Geological Association of Canada-Mineralogical Association of Canada annual meeting 2017 (Kingston), GAC-MAC 2017 v. 40, 436.
Zanchetta, S., Worthington, J.R., Angiolini, L., and Zanchi, A., 2017. The Bashgumbaz “ophiolites” of SE Pamir (Tajikistan): Time constraints for the South Pamir accretion to Eurasia. EGU General Assembly 2017 (Vienna), Geophysical Research Abstracts, v. 19 (EGU2017-5066).
2016
Zanchetta, S., Zanchi, A., Worthington, J.R., Malaspina, N., and Angiolini, L., 2016. The Cimmerian obduction of the Bashgumbaz ophiolites (South Pamir, Tajikistan). 88th Congress of the Italian Geological Society 2016 (Napoli).
2015
Schneider, S., Worthington, J.R., Pfänder, J., and Ratschbacher, L., 2015. Dating deformation along major Pamir shear zones with the Ar-Ar in situ technique. Goldschmidt 2015 (Prague).
Worthington, J.R., Kapp, P., Minaev, V., Chapman, J.B., Oimahmadov, I., and Gadoev, M., 2015. Late Paleozoic tectonomagmatic evolution of the western southern Tian Shan, Tajikistan. EGU General Assembly 2015 (Vienna), Geophysical Research Abstracts, v. 17 (EGU2015-9227-1).
Chapman, J.B., Robinson, A.C., Worthington, J.R., Carappa, B., Kapp, P., Gadoev, M., and Oimahmadov, I., 2015. Mesozoic shortening and syn-tectonic sedimentation in the southern Pamir: Implications for gneiss-dome metamorphism and crustal thickening. GSA 2015 Annual Meeting (Baltimore), GSA Abstracts with Programs, v. 47, 7-39.
2014
Worthington, J.R., Kapp, P., Minaev, V., Chapman, J.B., Oimahmadov, I., and Gadoev, M., 2014. Late Paleozoic tectonomagmatic evolution of the western southern Tian Shan, Tajikistan. Darius Programme Final Symposium (Paris).
2012
Worthington, J.R., Hacker, B.R., and Zandt, G., 2012. Distinguishing eclogite from peridotite: EBSD-based calculations of seismic velocities. AGU 2012 Fall Meeting (San Francisco), (DI24A-07).
2011
Braile, L.W., Bailey, B.L., Bailey, J., Bunening, J., Christianson, R., Davy, R., Judy, B., Kiyan, D., Kordy, M.A., Pazos, C., Roza, J., Wilks, M, Worthington, J.R., Baldridge, W.S.S., Biehler, S., Ferguson, J.F., McPhee, D.K., and Snelson, K., 2011. Seismic and gravity investigation of the eastern boundary of the Santo Domingo basin, Rio Grande rift, New Mexico. AGU 2011 Fall Meeting (San Francisco), (T21A-2316).
INVITED TALKS
2024-01-22: UCSD (San Diego, CA, USA), Geoscience / Marine Chemistry and Geochemistry Seminar
Regional-tectonic influence of oceanic-plateau accretion on the Central Asian orogenic system during the late Neoproterozoic to early Paleozoic: The ophiolitic Bayankhongor suture, Mongolia
2022-11-09: Univ. Southern California (Los Angeles, CA, USA), Lithospheric Dynamics Seminar
Metasomatism of the lower crust can drive anorogenic plateau formation
2021-02-16: UCSD (San Diego, CA, USA), Petrology, Geochemistry, and Tectonics Seminar
The Alichur dome, South Pamir, western India–Asia collisional zone: detailing the Neogene Shakhdara–Alichur syn-collisional gneiss-dome complex and connection to lithospheric processes
2020-02-19: Univ. Southern California (Los Angeles, CA, USA), Lithospheric Dynamics Seminar
The Alichur dome, South Pamir, western India–Asia collisional zone: detailing the Neogene Shakhdara–Alichur syn-collisional gneiss-dome complex and connection to lithospheric processes
2018-02-01: Caltech (Pasadena, CA, USA), Geoclub Seminar
Miocene, syn-collisional, convergence-parallel (~N–S) extensional exhumation of the Alichur dome, South Pamir, Tajikistan.
2015-04-30: Univ. Potsdam (Potsdam, Germany), Tectonics Seminar
Late Paleozoic tectonomagmatic evolution of the western southern Tian Shan, Tajikistan