Draft:Amit Segev

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    If NACADEMIC does not apply then you need to meet the WP:GOLDENRULE, which need independent sources to comment on the subject. ChrysGalley (talk) 17:43, 2 June 2026 (UTC)


Amit Segev
עמית שגב
Born
Amit Frank

(1946-07-22) 22 July 1946 (age 79)
Tiberias, Israel
Other nameAmit Segev-Frank
Alma materHebrew University of Jerusalem
PartnerShirley Shaiak
ChildrenLiat Hadas, Sivan Shadmi, Mattan Segev-Frank
Scientific career
InstitutionsGeological Survey of Israel
Zvi Garfunkel, Eytan Sass
Doctoral students
Reli Wald

Amit Segev (Hebrew: עמית שגב; born 22 July 1946, Tiberias, Israel) is an Israeli geologist with a Ph.D., a researcher (emeritus) at the Geological Survey of Israel, part of the Israeli Ministry of Energy and Infrastructure. His research spans a wide range of geoscience topics, including the formation of metallic mineral deposits and economic geology, mantle plume magmatism, Phanerozoic magmatism-volcanism in the Middle East, plate tectonics, the structure of the Earth’s crust in the eastern Mediterranean, the Dead Sea Fault, geophysics, and geodynamics. Segev has published more than 140 scientific articles, geological maps, and reports that have significantly contributed to global understanding of Earth’s crustal development in the Middle East and the evolution of the eastern Mediterranean region.

Biography

Amit Segev was born in Tiberias with the birth name Amit Frank and grew up in Kibbutz Sha’ar HaGolan. He is the son of Yehuda (originally Juraj) Frank, a Holocaust survivor born in Nové Zámky, Slovakia, who immigrated to Israel after World War II began in 1939, and Shoshana née Yagen (Originally Yagnjatinsky), who was born in Haifa to Ukrainian parents.

Segev completed his high school education at the agricultural school Bik’at Kinnarot in 1964.

During his mandatory service in the Israel Defense Forces, he served in the Israeli Combat Engineering Corps, participating in the Six-Day War, the War of Attrition, and the Yom Kippur War, including reserve duty as an engineering officer. He was released from reserve service in the rank equivalent to Major.

Segev holds three degrees from the Hebrew University of Jerusalem. In 1976, he completed a master’s degree in geology under Professor Yaakov Ben-Tor. His Master’s thesis focused on the geological structure of the Zin Valley syncline and the formation of porcelanite layers between phosphorite beds. In 1975, he joined the Geological Survey of Israel. In 1986, he completed his Ph.D. dissertation under Professors Eytan Sass and Zvi Garfunkel, on the geology of the Timna Valley and the origin of copper and manganese deposits there.

Segev has three children and six grandchildren from his first marriage, and is in a partnership with Shirley Shaiak, who has three children and eight grandchildren from her previous marriage.

Career and Research

In 1987, Segev was awarded the Minerva Fellowship to develop a new method of K–Ar dating of manganese minerals. Between 1987 and 1988, he spent a sabbatical year in Germany conducting postdoctoral research at the University of Heidelberg. From 1992 to 1997, he served as Head of the Division of Minerals and Energy Resources at the Geological Survey of Israel. Between 2009 and 2010, he spent a second sabbatical in Dunedin, New Zealand, researching the structure of the SW Pacific oceanic crust and the development of Zealandia, a submerged continental fragment once part of Gondwana.

Most of his research was conducted in cooperation with other researchers.

Copper and Manganese Deposits in Timna

Segev conducted extensive geological mapping and stratigraphic research of the Timna Valley.[1][2], one of the first studies there, after decades of intensive mining. His research developed a multi-stage model for copper and manganese enrichment: starting with initial sedimentary deposition from the Cambrian period (about 510 million years ago)[3], through hydrothermal enrichments associated with tectonic-magmatic activity, and ending with later Karst processes related to the formation of the nearby Dead Sea Fault [4][5]. Segev developed K–Ar dating methods for manganese minerals, which were also applied in other places, including the Black Forest in Germany[6][7]. By combining geological, geophysical, and geochronological methods, Segev revealed volcanic eruption centers and magmatic intrusion from the Lower Cretaceous period and their influence on the formation of the metallic deposits[8].

Segev initiated a long-term research program in 1998 aimed at reconstructing the sequence of volcanic and magmatic events in the Levant throughout the Phanerozoic. Based on new ^40Ar/^39Ar age determinations, integrated with previously published age data, he established a continuous chronological framework comprising 17 magmatic events spanning from 202 to 5 million years ago [9][10]. By combining these results with ages obtained from other geochronological methods, he demonstrated the activity of four mantle plumes in the Levant that led to crustal extension and rifting:

  • The Permian plume that caused the “Palmyra” trough[11][12].
  • The late Triassic to middle Jurassic plume that caused the rifting and opening of the Southern Neotethys Ocean and the Levant Basin[13][14].
  • The Cretaceous plume continued the rifting of the Levant Basin[15][16][17].
  • The plume, since the Oligocene, caused the breakup between the Africa, Arabia, and Sinai plates[9].  

Crustal Structure in the Eastern Mediterranean

Since the early 2000s, Segev has developed a three-dimensional model for the crustal structure of Israel, Jordan, and the eastern Mediterranean Basin, using gravity, magnetic, and seismic data [18][19]. His findings indicate that the Levant Basin cannot be classified as purely oceanic or thin continental crust. Instead, it represents a hybrid nature crustal domain[20]. These results contribute to a better understanding of the evolution of the Levant continental margin, long-term subsidence, and isostatic compensation. Through isostatic calculations, Segev demonstrated that the load imposed by the Nile sedimentary cone led to the development of concentric zones of uplift and subsidence.

Red Sea, Gulf of Eilat/ Aqaba, and Dead Sea Fault

From 2010 onward, Segev has investigated the breakup that developed between the African and Arabian tectonic plates. His studies demonstrated that rifting in the Red Sea and the Gulf of Eilat began approximately 25 million years ago [21], contrary to the previously prevailing view. He defined the evolution of the Irbid Rift in NW Jordan and showed that its initiation predated the development of the Dead Sea Fault [22][23][24]. Segev investigated the structural characteristics of the Dead Sea Fault from northern Israel to Turkey [25][26][27][28]. He suggested that only about 5 million years ago, its present-day configuration became established as a paired-band strike-slip fault system [29][30]. He further noted that the northernmost segment of the Dead Sea Fault has not yet connected to the East Anatolian Fault in Turkey, and therefore its classification as a transform fault is not strictly accurate [31].

Economic Geology and Natural Resources Mapping

From the 1970s through the 1990s, Segev participated in geochemical and geophysical surveys of Sinai and the Negev in Israel [32][33].  Later on, he led two national projects mapping natural resource distributions of raw materials for construction materials, industrial minerals, and oil shale [34][35]. He initiated the establishment of the Mining Commissioner within the Ministry of Energy and Infrastructure.

International Research

  • SW Germany: developed a new method of K–Ar dating of manganese minerals in the Black Forest [7].
  • SW Pacific Ocean: constructed gravity and crustal thickness maps that reveal large parts of the Zealandia submerged continent [36].
  • Chicxulub asteroid impact: led pioneer research suggesting that this impact 66 million years ago triggered geodynamic changes that influenced global mantle plume activity and plate tectonics [37].

Public Roles and Activities

  • Directed the Division of Minerals and Energy Resources at the Geological Survey of Israel (1992–1997).
  • Led projects that established databases for the national natural resources of Israel. Led national geological mapping initiatives, producing 1:50,000 and 1:20,000 scale maps [38].
  • Initiated the establishment of the Mining Commissioner within the Ministry of Energy and Infrastructure.
  • Served on inter-ministerial committees related to resource management.
  • Author of geological mapping of Israel at a scale of 1:50,000 — Be’er Ora [39], Mount Seguv [40], Atlit [41][42], and Haifa [43][44] sheets; and at a scale of 1:20,000 — the Timna Valley [45]

References

  1. ^ Segev, Amit (1984). "Lithostratigraphy and paleogeography of the marine Cambrian in southern Israel and southwestern Jordan". Israel Journal of Earth Sciences. 33 (1–2): 26–33.
  2. ^ Segev, Amit; Sass, Eytan (June 1989). "Lithofacies and thickness control by epigenetic dissolution—the dolomitic Timna Formation, Cambrian, southern Israel". Sedimentary Geology. 63 (1–2): 109–126. Bibcode:1989SedG...63..109S. doi:10.1016/0037-0738(89)90074-2.
  3. ^ Segev, A (June 1987). "The age of the latest precambrian volcanism in southern israel, northeastern sinai and southwestern jordan - a re-evaluation". Precambrian Research. 36 (3–4): 277–285. Bibcode:1987PreR...36..277S. doi:10.1016/0301-9268(87)90025-8.
  4. ^ Segev, Amit; Sass, Eytan (1989). "Copper-enriched syngenetic dolostones as a source for epigenetic copper mineralization in sandstones and shales (Timna, Israel)". Geological Association of Canada Special Paper. 36. tiona long-term research program in 1998 a multi-year research program in 1998 oc: 647–65.
  5. ^ Segev, A. (May 1992). "Remobilization of uranium and associated metals through karstification processes: A case study from the Timna Formation (Cambrian), Southern Israel". Ore Geology Reviews. 7 (2): 135–148. Bibcode:1992OGRv....7..135S. doi:10.1016/0169-1368(92)90009-A.
  6. ^ Segev, A.; Halicz, L.; Steinitz, G.; Lang, B. (July 1995). "Post-depositional processes on a buried Cambrian sequence in southern Israel, north Arabian Massif: evidence from new K–Ar dating of Mn-nodules". Geological Magazine. 132 (4): 375–385. Bibcode:1995GeoM..132..375S. doi:10.1017/S0016756800021440. ISSN 0016-7568.
  7. ^ a b Segev, Amit; Halicz, Ludwik; Lang, Barbu (1991). "K-Ar dating of manganese minerals from the Eisenbach region, Black Forest, southwest Germany". Schweizerische mineralogische und petrographische Mitteilungen = Bulletin suisse de minéralogie et pétrographie. 71 (1). doi:10.5169/SEALS-54349.
  8. ^ Segev, A (June 1987). "The age of the latest precambrian volcanism in southern israel, northeastern sinai and southwestern jordan - a re-evaluation". Precambrian Research. 36 (3–4): 277–285. Bibcode:1987PreR...36..277S. doi:10.1016/0301-9268(87)90025-8.
  9. ^ a b Segev, A (October 2000). "Synchronous magmatic cycles during the fragmentation of Gondwana: radiometric ages from the Levant and other provinces". Tectonophysics. 325 (3–4): 257–277. Bibcode:2000Tectp.325..257S. doi:10.1016/S0040-1951(00)00122-0.
  10. ^ Segev, Amit; Goldshmidt, Vladimir; Itamar, Arie; Rybakov, Michael; et al. (1996). "Effects of Mesozoic magmatism on composition, structure, and metallic mineralization in the Ramon area (southern Israel): Magnetometric and gravimetric evidence". Israel Journal of Earth Sciences. 45: 89–112 – via ResearchGate.
  11. ^ Segev, Amit; Eshet-Alkalai, Yoram (2003). "Significance of Rb/Sr age of Early Permian volcanics, Helez Deep 1A borehole, central Israel". Africa Geoscience Review. 10: 333–345 – via ResearchGate.
  12. ^ Segev, A.; Sass, E.; Schattner, U. (November 2025). "Volcano-sedimentary response to a mantle plume decay: A case study from the Eastern Mediterranean margin". Geoscience Frontiers. 16 (6) 102161. Bibcode:2025GeoFr..1602161S. doi:10.1016/j.gsf.2025.102161.
  13. ^ Segev, Amit; Rybakov, Michael (July 2010). "Effects of Cretaceous plume and convergence, and Early Tertiary tectonomagmatic quiescence on the central and southern Levant continental margin". Journal of the Geological Society. 167 (4): 731–749. Bibcode:2010JGSoc.167..731S. doi:10.1144/0016-76492009-118. ISSN 0016-7649.
  14. ^ Segev, Amit; Rybakov, Michael (April 2011). "History of faulting and magmatism in the Galilee (Israel) and across the Levant continental margin inferred from potential field data". Journal of Geodynamics. 51 (4): 264–284. Bibcode:2011JGeo...51..264S. doi:10.1016/j.jog.2010.10.001.
  15. ^ Segev, Amit (June 2009). "40Ar/39Ar and K–Ar geochronology of Berriasian–Hauterivian and Cenomanian tectonomagmatic events in northern Israel: implications for regional stratigraphy". Cretaceous Research. 30 (3): 810–828. doi:10.1016/j.cretres.2009.01.003.
  16. ^ Segev, Amit; Weissbrod, Tuvia; Lang, Barbu (August 2005). "40Ar/39Ar dating of the Aptian–Albian igneous rocks in Makhtesh Ramon (Negev, Israel) and its stratigraphic implications". Cretaceous Research. 26 (4): 633–656. doi:10.1016/j.cretres.2005.03.003.
  17. ^ Segev, Amit; Sass, Eytan; Ron, Hagai; Lang, Barbu; Kolodny, Yehoshua; McWilliams, Michael (2002-01-01). "Stratigraphic, geochronologic, and paleomagnetic constraints on Late Cretaceous volcanism in northern Israel". Israel Journal of Earth Sciences. 51 (3–4): 297–309. doi:10.1560/VUTP-RNR5-UU08-Y7WT. ISSN 0021-2164.
  18. ^ Rybakov, Michael; Segev, Amit (September 2004). "Top of the crystalline basement in the Levant". Geochemistry, Geophysics, Geosystems. 5 (9) 2004GC000690. Bibcode:2004GGG.....5.9001R. doi:10.1029/2004GC000690. ISSN 1525-2027.
  19. ^ Segev, Amit; Rybakov, Michael; Lyakhovsky, Vladimir; Hofstetter, Avraham; Tibor, Gidon; Goldshmidt, Vladimir; Ben Avraham, Zvi (October 2006). "The structure, isostasy and gravity field of the Levant continental margin and the southeast Mediterranean area". Tectonophysics. 425 (1–4): 137–157. Bibcode:2006Tectp.425..137S. doi:10.1016/j.tecto.2006.07.010.
  20. ^ Segev, Amit; Sass, Eytan; Schattner, Uri (July 2018). "Age and structure of the Levant basin, Eastern Mediterranean". Earth-Science Reviews. 182: 233–250. Bibcode:2018ESRv..182..233S. doi:10.1016/j.earscirev.2018.05.011.
  21. ^ Avni, Y.; Segev, A.; Ginat, H. (2012-11-01). "Oligocene regional denudation of the northern Afar dome: Pre- and syn-breakup stages of the Afro-Arabian plate". Geological Society of America Bulletin. 124 (11–12): 1871–1897. Bibcode:2012GSAB..124.1871A. doi:10.1130/B30634.1. ISSN 0016-7606.
  22. ^ Segev, Amit; Lyakhovsky, Vladimir; Weinberger, Ram (December 2014). "Continental transform–rift interaction adjacent to a continental margin: The Levant case study". Earth-Science Reviews. 139: 83–103. Bibcode:2014ESRv..139...83S. doi:10.1016/j.earscirev.2014.08.015.
  23. ^ Wald, Reli; Segev, Amit; Ben-Avraham, Zvi; Schattner, Uri (2018-10-08), Structural expression of a fading rift front, a case study from the Oligo-Miocene Irbid rift of northwest Arabia, doi:10.5194/se-2018-91, retrieved 2025-12-30
  24. ^ Regenauer-Lieb, Klaus; Rosenbaum, Gideon; Lyakhovsky, Vladimir; Liu, Jie; Weinberg, Roberto; Segev, Amit; Weinstein, Yishai (March 2015). "Melt instabilities in an intraplate lithosphere and implications for volcanism in the Harrat Ash-Shaam volcanic field (NW Arabia)". Journal of Geophysical Research: Solid Earth. 120 (3): 1543–1558. Bibcode:2015JGRB..120.1543R. doi:10.1002/2014JB011403. ISSN 2169-9313.
  25. ^ Segev, Amit; Avni, Yoav; Shahar, Jacob; Wald, Reli (August 2017). "Late Oligocene and Miocene different seaways to the Red Sea–Gulf of Suez rift and the Gulf of Aqaba–Dead Sea basins". Earth-Science Reviews. 171: 196–219. Bibcode:2017ESRv..171..196S. doi:10.1016/j.earscirev.2017.05.004.
  26. ^ Rosenthal, Michal; Segev, Amit; Rybakov, Michael; Lyakhovsky, Vladimir; Ben-Avraham, Zvi (2015), The deep structure and density distribution of northern Israel and its surroundings, Unpublished, doi:10.13140/RG.2.1.2733.2965, retrieved 2025-12-30
  27. ^ Schattner, Uri; Segev, Amit; Mikhailov, Valentin; Rybakov, Michael; Lyakhovsky, Vladimir (October 2019). "Magnetic Signature of the Kinneret–Kinarot Tectonic Basin Along the Dead Sea Transform, Northern Israel". Pure and Applied Geophysics. 176 (10): 4383–4399. Bibcode:2019PApGe.176.4383S. doi:10.1007/s00024-019-02211-6. ISSN 0033-4553.
  28. ^ Segev, Amit; Reznik, Itay J.; Schattner, Uri (April 2022). "Miocene to sub-Recent magmatism at the intersection between the Dead Sea Transform and the Ash Shaam volcanic field: evidence from the Yarmouk River gorge and vicinity". Geological Magazine. 159 (4): 469–493. Bibcode:2022GeoM..159..469S. doi:10.1017/S0016756821001072. ISSN 0016-7568.
  29. ^ Schattner, Uri; Segev, Amit; Mikhailov, Valentin; Rybakov, Michael; Lyakhovsky, Vladimir (August 2022). "Detailed Regional Magnetic Mapping on a Bike, A Case Study from Northern Israel". Pure and Applied Geophysics. 179 (8): 2769–2795. Bibcode:2022PApGe.179.2769S. doi:10.1007/s00024-022-03100-1. ISSN 0033-4553.
  30. ^ Segev, A.; Schattner, U. (February 2023). "Why does volcanism associated with the Dead Sea fault occur only along its crossing with the Irbid rift and Harrat Ash-Shaam volcanic field?". Tectonophysics. 848 229718. Bibcode:2023Tectp.84829718S. doi:10.1016/j.tecto.2023.229718.
  31. ^ Segev, Amit; Wetzler, Nadav; Schattner, Uri (December 2024). "When did the Dead Sea fault become a transform?". Tectonophysics. 892 230543. Bibcode:2024Tectp.89230543S. doi:10.1016/j.tecto.2024.230543.
  32. ^ Segev, A. (January 1984). "Gibbsite mineralization and its genetic implication for the Um Bogma manganese deposit, southwestern Sinai". Mineralium Deposita. 19 (1): 54. Bibcode:1984MinDe..19...54S. doi:10.1007/BF00206597. ISSN 0026-4598.
  33. ^ Segev, Amit; Beyth, Michal (1983). "Preliminary Report on the Geology of the Timna Valley and ITS Radioactive Mineralization". doi:10.13140/RG.2.2.18268.87682. {{cite journal}}: Cite journal requires |journal= (help)
  34. ^ Segev, Amit; Shirav, Moshe; Erlich, Sarah (1995). "Raw materials for the construction industry: Introduction to the national survey". doi:10.13140/RG.2.2.15857.15202. {{cite journal}}: Cite journal requires |journal= (help)
  35. ^ Segev, Amit; Shirav, Moshe; Cohen, Chana Netzer (2004). "Potential Raw Materials for Industry and Energy in Israel". doi:10.13140/RG.2.2.12376.76806. {{cite journal}}: Cite journal requires |journal= (help)
  36. ^ Segev, Amit; Rybakov, Michael; Mortimer, Nick (June 2012). "A crustal model for Zealandia and Fiji: Crustal model for Zealandia and Fiji". Geophysical Journal International. 189 (3): 1277–1292. doi:10.1111/j.1365-246X.2012.05436.x.
  37. ^ Segev, Amit; Wetzler, Nadav; O’Neill, Craig; Rosenbaum, Gideon (May 2025). "A plate geodynamic game changer: Effects of the 66 Ma Chicxulub asteroid collision". Geoscience Frontiers. 16 (3) 102032. Bibcode:2025GeoFr..1602032S. doi:10.1016/j.gsf.2025.102032.
  38. ^ Segev, Amit (1996). "National Survey of Raw Materials for the Building Industry in Israel". doi:10.13140/RG.2.2.32089.99682. {{cite journal}}: Cite journal requires |journal= (help)
  39. ^ Beyth, Michael; Segev, Amit; Bartov, Yossi (November 2011). "The geological map of Israel, 1:50,000. Sheet 25-IV, Be'er Ora. In: Vectorial format of the 1:50,000 geological map of Israel by M. Rosensaft. Isr. Geol. Surv., Jerusalem. 2009 (Partly revised, November 2011)". Israel Geological Survey.
  40. ^ Segev, Amit; Beyth, Michael (2000). "The geological map of Israel, 1:50,000. Sheet 25-III, Har Seguv. In: Vectorial format of the 1:50,000 geological map of Israel by M. Rosensaft". Israel Geological Survey.
  41. ^ Segev, Amit; Sass, Eytan (2009). "The geological map of Israel, 1:50,000. Sheet 3-III, Atlit. In: Vectorial format of the 1:50,000 geological map of Israel". Israel Geological Survey.
  42. ^ Segev, Amit; Sass, Eytan (2009). "The geology of the Carmel region, Albian-Turonian volcano-sedimentary cycles on the northwestern edge of the Arabian platform". doi:10.13140/RG.2.2.28891.84006. {{cite journal}}: Cite journal requires |journal= (help)
  43. ^ Segev, Amit; Sass, Eytan (2014). "Geological map of Israel 1:50,000 Hefa (south) sheet 3-I". doi:10.13140/RG.2.2.22233.38247. {{cite journal}}: Cite journal requires |journal= (help)
  44. ^ Segev, Amit; Sass, Eytan (2014). "Geology of Mount Carmel – Completion of the Haifa region". doi:10.13140/RG.2.2.35655.15529. {{cite journal}}: Cite journal requires |journal= (help)
  45. ^ Segev, Amit; Beyth, Michael (1986). "Geological Map of Timna Valley 1:20,000". doi:10.13140/RG.2.2.24749.96483. {{cite journal}}: Cite journal requires |journal= (help)

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