Structure of the Upper Part of the Earth’s Crust in the Area of the Lena River Delta: The First Magnetotelluric Data

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Structure of the Upper Part of the Earth’s Crust in the Area of the Lena River Delta: The First Magnetotelluric Data. / Zaplavnova, A. A.; Deev, E. V.; Potapov, V. V.

In: Doklady Earth Sciences, Vol. 514, No. 2, 02.2024, p. 249-254.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{0fbd3f0939384889976b8e969304bb73,

title = "Structure of the Upper Part of the Earth{\textquoteright}s Crust in the Area of the Lena River Delta: The First Magnetotelluric Data",

abstract = "We present the first magnetotelluric sounding (MTS) data acquired in the southern part of the Lena River delta which is a junction zone of the Siberian Craton and the Verkhoyansk fold-and-thrust belt, in the transition zone from the Eurasian Continent to the shelf of the Laptev Sea. The MTS data were used to construct a vertical section of the bulk electrical resistivity (ER) structure of the Earth{\textquoteright}s crust down to a depth of 8 km. The upper high-resistivity layer (320–1000 Ohm m) corresponds to the permafrost rocks ranging in thickness from 1 km to 400 m under the channels of the Lena River. The underlying deformed Mesoproterozoic–Lower Triassic rocks can vary in composition, but they are poorly differentiated in ER values (110–240 Ohm m). We detected three low-resistivity anomalies (10–60 Ohm m) related to the fluid-saturated core and damage zones of active faults. A deep-lying high-resistivity anomaly (320–350 Ohm m) identified at the northeastern part of the section can correspond to the Lower Proterozoic or Archean metamorphic rocks.",

keywords = "Earth{\textquoteright}s crust, Lena River, active fault, delta, magnetotelluric sounding, permafrost",

author = "Zaplavnova, {A. A.} and Deev, {E. V.} and Potapov, {V. V.}",

note = "The field research was carried out under a State Assignment of the A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch, Russian Academy of Sciences, project no. FWZZ-2022-0024. Processing and interpretation of the results obtained were supported by the Russian Science Foundation, project no. 23-17-00237.",

year = "2024",

month = feb,

doi = "10.1134/S1028334X23602833",

language = "English",

volume = "514",

pages = "249--254",

journal = "Doklady Earth Sciences",

issn = "1028-334X",

publisher = "PLEIADES PUBLISHING INC",

number = "2",

}

RIS

TY - JOUR

T1 - Structure of the Upper Part of the Earth’s Crust in the Area of the Lena River Delta: The First Magnetotelluric Data

AU - Zaplavnova, A. A.

AU - Deev, E. V.

AU - Potapov, V. V.

N1 - The field research was carried out under a State Assignment of the A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch, Russian Academy of Sciences, project no. FWZZ-2022-0024. Processing and interpretation of the results obtained were supported by the Russian Science Foundation, project no. 23-17-00237.

PY - 2024/2

Y1 - 2024/2

N2 - We present the first magnetotelluric sounding (MTS) data acquired in the southern part of the Lena River delta which is a junction zone of the Siberian Craton and the Verkhoyansk fold-and-thrust belt, in the transition zone from the Eurasian Continent to the shelf of the Laptev Sea. The MTS data were used to construct a vertical section of the bulk electrical resistivity (ER) structure of the Earth’s crust down to a depth of 8 km. The upper high-resistivity layer (320–1000 Ohm m) corresponds to the permafrost rocks ranging in thickness from 1 km to 400 m under the channels of the Lena River. The underlying deformed Mesoproterozoic–Lower Triassic rocks can vary in composition, but they are poorly differentiated in ER values (110–240 Ohm m). We detected three low-resistivity anomalies (10–60 Ohm m) related to the fluid-saturated core and damage zones of active faults. A deep-lying high-resistivity anomaly (320–350 Ohm m) identified at the northeastern part of the section can correspond to the Lower Proterozoic or Archean metamorphic rocks.

AB - We present the first magnetotelluric sounding (MTS) data acquired in the southern part of the Lena River delta which is a junction zone of the Siberian Craton and the Verkhoyansk fold-and-thrust belt, in the transition zone from the Eurasian Continent to the shelf of the Laptev Sea. The MTS data were used to construct a vertical section of the bulk electrical resistivity (ER) structure of the Earth’s crust down to a depth of 8 km. The upper high-resistivity layer (320–1000 Ohm m) corresponds to the permafrost rocks ranging in thickness from 1 km to 400 m under the channels of the Lena River. The underlying deformed Mesoproterozoic–Lower Triassic rocks can vary in composition, but they are poorly differentiated in ER values (110–240 Ohm m). We detected three low-resistivity anomalies (10–60 Ohm m) related to the fluid-saturated core and damage zones of active faults. A deep-lying high-resistivity anomaly (320–350 Ohm m) identified at the northeastern part of the section can correspond to the Lower Proterozoic or Archean metamorphic rocks.

KW - Earth’s crust

KW - Lena River

KW - active fault

KW - delta

KW - magnetotelluric sounding

KW - permafrost

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85182697818&origin=inward&txGid=c933630941378d9f80fb1753487c2254

UR - https://www.webofscience.com/wos/woscc/full-record/WOS:001145714500017

UR - https://www.mendeley.com/catalogue/d466e660-b94c-3575-b426-2f2fd7624423/

U2 - 10.1134/S1028334X23602833

DO - 10.1134/S1028334X23602833

M3 - Article

VL - 514

SP - 249

EP - 254

JO - Doklady Earth Sciences

JF - Doklady Earth Sciences

SN - 1028-334X

IS - 2

ER -

ID: 61166776