2026-05-27 13:49:00
Preliminary Field Trip Schedule
The following itinerary is a general schedule for the field excursion and may be subject to minor changes depending on weather, road conditions, and logistical considerations.
“ENVIRONMENTAL HAZARDS IN ASIA-2nd” CONFERENCE FIELDTRIP
July 31-August 04, 2026
Mogod-Khujirt
The 2026 Conference Fieldtrip will be held in Arkhangai provinces, Mongolia, during July 31st - August 4th, 2026, organized by the team under supervision of the Conference Organizing Committee.
The focal themes for the 2026 Fieldtrip are as follows (see the Fig. 1):
Environmental hazards: Quaternary geology, geomorphology and environmental changes; earthquakes; depositional environments; paleoenvironmental and paleoclimatic changes. Objectives: Mogod fault rupture (Stop 1), Khujirt (Stop 2).
General schedule
July 31
Depart from Ulaanbaatar at 6:00 AM. Breakfast will be served in the field near UB at approximately 7:00 AM. Continue driving west to the town of Mogod, located about 320 km from Ulaanbaatar. Arrive in the late afternoon and stay at the guest houses of the IAG Mogod seismic station.
August 1
Observe co-seismic fault ruptures associated with the January 4, 1967 Mogod Mw 7.0 earthquake.
- Morning: Hike along the right-lateral strike-slip surface ruptures.
- Afternoon: Visit and observe the Tu’leet thrust fault.
References
- https://academic.oup.com/gji/article/138/3/784/578842
- https://www.nature.com/articles/s41598-021-97167-w
August 2
Drive approximately 125 km south from Mogod to the town of Kharkhorin. Visit the local museum and monastery, followed by sightseeing around the town. Overnight stay at a tourist camp with shared accommodation (3–4 persons per ger).
August 3
Drive south along the Orkhon River to observe the Cenozoic volcanic field, canyon, and waterfall. Camp near the Orkhon River. IAG will provide tents shared by 2–3 persons. Guests are advised to bring sleeping bags and personal tents if preferred.
References
- https://www.researchgate.net/publication/277308728_Late_Mesozoic-Cenozoic_Intraplate_Magmatism_in_Central_Asia_and_Its_Relation_with_Mantle_Diapirism_Evidence_from_the_South_Khangai_Volcanic_Region_Mongolia
August 4
Drive back to Ulaanbaatar and arrive in the late afternoon.
BRIEF INTRODUCTION TO THE LOCALITIES AND OBJECTIVES
Stop 1. Mogod fault rupture. The Mogod fault is one of the active faults in Mongolia, being the site of the 1967 Mogod earthquake. The Mogod fault has two N-S right-lateral strike-slip segments, which end in thrusts in a NW-SE fault at the southern end of the strike-slip fault.
(Bayasgalan and Jackson, 1999)
The 1967 Mogod earthquake M7, in Mogod provides important evidence about earthquake behavior in slowly deforming continental regions (SDCR). Although such regions are often thought to experience randomly distributed earthquakes, geological investigations reveal at least three major surface-rupturing earthquakes over the last 50,000 years along the same fault system, with an estimated slip rate of 0.06 ± 0.01 mm/year. These findings demonstrate that, similar to rapidly deforming regions, tectonic deformation in SDCR is concentrated along specific faults.
(Bollinger et al., 2021)
Stop 2. Khujirt. The South Khangai Volcanic Region (SKVR) is a widespread volcanic province in southern and central Mongolia, formed through 13 successive igneous episodes from the Late Jurassic to the Late Cenozoic. Volcanic activity migrated systematically across the region over more than 1600 km. The composition of igneous rocks varies from basanites to rhyolites (predominantly, high-K rocks), with geochemistry close to that of OIB. Over time, the magma composition evolved, showing a decrease in heavy rare earth elements (HREE) and an increase in Nb and Ta contents in younger mafic rocks. Isotopic evidence indicates that the magmas were derived from changing mantle sources, including EMII, PREMA, and later EMI mantle components during different geological periods.
(Yarmolyuk et al., 2015)
