New Paleomagnetic Constraints on the Early Cretaceous Paleolatitude of the Lhasa Terrane (Tibet)
dc.contributor.author | Li, Zhenyu | |
dc.contributor.author | Ding, Lin | |
dc.contributor.author | Laskowski, Andrew K. | |
dc.contributor.author | Burke, William B. | |
dc.contributor.author | Chen, Yaofei | |
dc.contributor.author | Song, Peiping | |
dc.contributor.author | Yue, Yahui | |
dc.contributor.author | Xie, Jing | |
dc.date.accessioned | 2022-10-31T19:26:49Z | |
dc.date.available | 2022-10-31T19:26:49Z | |
dc.date.issued | 2022-05 | |
dc.description.abstract | New zircon U-Pb dating results from the Zonggei Formation volcanics indicate that the volcanic rocks formed at ∼114–110 Ma. Paleomagnetic data, petrography, and rock magnetism confirm the primary nature of isolated characteristic remanent magnetizations carried by titanomagnetite and hematite. A statistical analysis of the combined results from the Zonggei and Duoni formations reveals a group-mean direction of D±ΔD = 0.4° ± 6.0°, I±ΔI = 22.2° ± 5.6°, α95 = 5.6°, k = 35.2 after bedding correction based on 20 group-mean directions. The corresponding paleopole was calculated to be λp = 70.3°N, φp = 270.5°E with A95 = 5.2°. The interpretation of our data alongside the Cenozoic data from the Tethyan Himalaya indicates that the India–Asia collision initiated by 61.7 ± 3.0 Ma at 13.0° ± 1.8°N, assuming a single-collision model. Intracontinental crustal shortening totaling 1,770 ± 470 km took place on the Asian side since the onset of India–Asia collision. Furthermore, the data show that the Neo-Tethys Ocean reached its maximum N-S width of 7,100 ± 530 km at ∼132 Ma and shrank to 6,400 ± 550 km by ∼115 ± 5 Ma. This is consistent with previous estimates based on the geophysical images of the subducted Neo-Tethyan slab beneath Eurasia. | en_US |
dc.identifier.citation | Li Z, Ding L, Laskowski AK, Burke WB, Chen Y, Song P, Yue Y and Xie J (2022) New Paleomagnetic Constraints on the Early Cretaceous Paleolatitude of the Lhasa Terrane (Tibet). Front. Earth Sci. 10:785726. doi: 10.3389/feart.2022.785726 | en_US |
dc.identifier.issn | 2296-6463 | |
dc.identifier.uri | http://scholarworks.montana.edu/handle/1/17327 | |
dc.language.iso | en_US | en_US |
dc.publisher | Frontiers Media SA | en_US |
dc.rights | cc-by | en_US |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_US |
dc.subject | lhasa terrane | en_US |
dc.subject | india-asia collision | en_US |
dc.subject | neo-tethys ocean | en_US |
dc.subject | paleolatitude | en_US |
dc.subject | geochronology | en_US |
dc.subject | intracontinental crustal shortening | en_US |
dc.title | New Paleomagnetic Constraints on the Early Cretaceous Paleolatitude of the Lhasa Terrane (Tibet) | en_US |
dc.type | Article | en_US |
mus.citation.extentfirstpage | 1 | en_US |
mus.citation.extentlastpage | 27 | en_US |
mus.citation.journaltitle | Frontiers in Earth Science | en_US |
mus.citation.volume | 10 | en_US |
mus.identifier.doi | 10.3389/feart.2022.785726 | en_US |
mus.relation.college | College of Letters & Science | en_US |
mus.relation.department | Earth Sciences. | en_US |
mus.relation.university | Montana State University - Bozeman | en_US |
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