geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Post 10 Ma tilting and exhumation of the southern Sierra Nevada/Tehachapi Mountains from apatite U-Th/He analyses


, : Post 10 Ma tilting and exhumation of the southern Sierra Nevada/Tehachapi Mountains from apatite U-Th/He analyses. Geological Society of America 40.1

Nine new apatite (U-Th)/He ages for samples from the southernmost Sierra Nevada/Tehachapi Mountains reveal late Cenozoic exhumation and tilting. The samples were collected along a northwest-trending transect, traversing a block bounded to the north by the White Wolf blind thrust fault and to the south by the Garlock left-lateral strike-slip fault. Both faults are active. He ages range from 66 Ma to 7.4 Ma, with the samples located farthest to the northwest yielding the oldest ages. He ages become increasingly younger to the south, as the sample elevation increases. This age/elevation relationship is consistent with progressively increasing amounts of exhumation (and surface uplift) to the south. In a previous study (Khalsa and Blythe, 1999), these same samples were analyzed using apatite fission-track thermochronometry. Apatite fission track ages ranged from 72 to 16 Ma, and were consistently older than the corresponding He age. He and fission track age patterns, as well as apatite fission-track length modeling, are best explained by northward tilting of the fault-bounded block, with greater exhumation of the higher elevation southern samples, those closest to the Garlock fault. These new apatite (U-Th)/He ages are best interpreted as indicating significant vertical motion (1-2 km) along the Garlock fault in the last 10 Myr. We are in the process of collecting zircon fission track analyses from these samples to further constrain the exhumation history of the area.

US$29.90


Other references

Bauer, C.; Gesslein, M., 2007: Emergency checklist: torn muscle fibre. Mmw Fortschritte der Medizin 149(40): 35-35

Tomar, S.S.; Rathore, S.S., 1988: Studies on relationship of growth and sink parameters with nitrogen and duration of picking intervals on yield in okra (Abelmoschus esculentus L.). In trials with the cv. Pusa Sawani the plants received N at 25, 50, 75 and 100 kg/ha and the fruits were picked at intervals of 2, 3 or 4 days. Data are tabulated on the effect of these treatments on several growth/sink parameters. The yield was h...

Roitto, Y., 1977: Finnish inland waterway fleet in 1975. An analysis with special reference to wood transporting vessels. Of the 778 vessels inspected, 495 were tugs and 71 were warping boats, mainly used by forest industries.

Sasayama, Yuichi; Matsubara, Takahiro; Takano, Kazunori, 1999: Topography and immunohistochemistry of the ultimobranchial glands in some subtropical fishes. Ichthyological Research 46(2): 219-222

Albihn, A.; Lovén, J.; Ohlsson, J.; Osorio, L.M.; Henriksson, M., 2006: c-Myc-dependent etoposide-induced apoptosis involves activation of Bax and caspases, and PKCdelta signaling. The c-Myc transcription factor is a key regulator of cell proliferation, differentiation, and apoptosis. While deregulation of myc induces programmed cell death, defects in the apoptotic program facilitate Myc-driven tumor development. We have tre...

Huster, D.; Lutsenko, S., 2003: The distinct roles of the N-terminal copper-binding sites in regulation of catalytic activity of the Wilson's disease protein. Wilson's disease protein (WNDP) is a copper-transporting ATPase essential for normal distribution of copper in human cells. Recent studies demonstrate that copper regulates WNDP through several mechanisms. Six metal-binding sites (MBS) at the...

Benaim, J.L.; Amar, O.; Alliez, A.; Bertrand, B., 2015: The interest of electroneuromyography in peripheral facial palsy. In case of peripheral facial palsy, electroneuromyogram of the facial nerve provides an indication of the nature (myelinic and/or axonal) and severity of nerve damage, thereby facilitating establishment of a prognosis, which is favorable for myeli...

Chérié Lignière, G., 1984: Relation between clinical response and plasma and synovial fluid levels of piroxicam. La Clinica Terapeutica 108(4): 297-304

Koizumi, H.; Aoyama, N.; Tokunaga, M., 1996: Preoperative management of the aged patients with cancer of the esophagus. The peak incidence of esophageal cancer is in the sixth decade, but the number of resections in patients older than 70 is increasing. 184 patients who underwent esophageal resections (C > or = 1) were divided into five groups according to age;...

Chen, G-Jun.; Huang, J.; Gao, L-Xun.; Han, F-She., 2011: Nickel-catalyzed cross-coupling of phenols and arylboronic acids through an in situ phenol activation mediated by PyBroP. A new method for the Suzuki-Miyaura cross-coupling of phenols and arylboronic acids through in situ phenol activation mediated by PyBroP is presented. The reaction proceeds efficiently by using cost-effective, markedly stable [NiCl(2)(dppp)] (dp...