New Paleomagnetic Constraints on the Early Cretaceous Paleolatitude of the Lhasa Terrane (Tibet)

dc.contributor.authorLi, Zhenyu
dc.contributor.authorDing, Lin
dc.contributor.authorLaskowski, Andrew K.
dc.contributor.authorBurke, William B.
dc.contributor.authorChen, Yaofei
dc.contributor.authorSong, Peiping
dc.contributor.authorYue, Yahui
dc.contributor.authorXie, Jing
dc.date.accessioned2022-10-31T19:26:49Z
dc.date.available2022-10-31T19:26:49Z
dc.date.issued2022-05
dc.description.abstractNew 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.citationLi 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.2022.785726en_US
dc.identifier.issn2296-6463
dc.identifier.urihttp://scholarworks.montana.edu/handle/1/17327
dc.language.isoen_USen_US
dc.publisherFrontiers Media SAen_US
dc.rightscc-byen_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.subjectlhasa terraneen_US
dc.subjectindia-asia collisionen_US
dc.subjectneo-tethys oceanen_US
dc.subjectpaleolatitudeen_US
dc.subjectgeochronologyen_US
dc.subjectintracontinental crustal shorteningen_US
dc.titleNew Paleomagnetic Constraints on the Early Cretaceous Paleolatitude of the Lhasa Terrane (Tibet)en_US
dc.typeArticleen_US
mus.citation.extentfirstpage1en_US
mus.citation.extentlastpage27en_US
mus.citation.journaltitleFrontiers in Earth Scienceen_US
mus.citation.volume10en_US
mus.identifier.doi10.3389/feart.2022.785726en_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.departmentEarth Sciences.en_US
mus.relation.universityMontana State University - Bozemanen_US

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