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29 results for “forearc”
Forearc faults in northern Cascadia do not accommodate elastic strain driven by the megathrust seismic cycle: Dataset
<p>Input files and codes for Harrichhausen, N., Morell, K.D., Regalla, C. Inner forearc faults in northern Cascadia do not accommodate elastic strain driven by the megathrust seismic cycle. Submitted to Seismica. 2024.</p> <p>See Readme.md for more information</p> <p>Version 1.1: Updated author list and funding information.</p> <p>Version 1.2: Updated matlab codes to work on Mac.</p>
Fluid Transport and Storage in the Cascadia Forearc inferred from Magnetotelluric Data
<p>The 3D electrical resistivity model derived from magnetotelluric data inversion. The model file is in netCDF format, which can be viewed using any standard netCDF plotting tools (e.g. <a href="https://www.giss.nasa.gov/tools/panoply/">Panoply</a>).</p>
Fig. 10 in Jurassic and Cretaceous gastropods from hydrocarbon seeps in forearc basin and accretionary prism settings, California
Fig. 10. Examples of "folded" rather than crushed shells. A. Paskentana globosa sp. nov. (CAS 70394) from Knoxville (Lower Cretaceous; site 9). B. Paskentana paskentaensis (Stanton, 1895) (UCMP 154113) from Rice Valley (Hauterivian?; site 3). C. Atresius liratus (CAS 70405) from Rocky Creek (Valanginian; site 7).
Fig. 9 in Jurassic and Cretaceous gastropods from hydrocarbon seeps in forearc basin and accretionary prism settings, California
Fig. 9. Gastropods of uncertain affinities from Early Cretaceous seep carbonates in California, USA. A. Stanton's (1895) "Cerithium" sp. (USNM 23081) from Cold Fork of Cottonwood Creek (Albian; site 1), image taken with light microscope (A1) and with SEM (specimen uncoated, A2). B. Fusiform gastropod (CAS 70403) from Rocky Creek (Valanginian; site 7). C. High−spired gastropod (CAS 70404) from W Berryessa (probably Valanginian; site 11).
Fig. 8 in Jurassic and Cretaceous gastropods from hydrocarbon seeps in forearc basin and accretionary prism settings, California
Fig. 8. Gastropods of uncertain taxonomic position, Atresius liratus Gabb, 1869 and Bathypurpurinopsis stantoni sp. nov., from Early Cretaceous seep carbonates in California, USA. A–F. Atresius liratus. A. Specimen (CAS 70395) with broad shoulder, from Rocky Creek (Valanginian; site 7). B. Specimen (CAS 70396) from Rocky Creek, note fine spiral sculpture on shoulder. C. Specimen (CAS 70397) with strong axial ribs, from Rocky Creek. D. Large specimen (CAS 70398) with rounded basal margin, from Rocky Creek. E. Specimen (USNM 23075a) illustrated by Stanton (1895: pl. 11: 6). F. Another specimen (USNM 23075b) from Stanton's lot with fewer but stronger spirals, and a more angular basal margin. G–L. Bathypurpurinopsis stantoni, from Cold Fork of Cottonwood Creek (Albian; site 1). G. Specimen (CAS 70399) with thin apertural fold and preserved siphonal column. H. Specimen (CAS 70400) with excavated aperture. I. Specimen (UCMP 555102) showing fine spiral sculpture and sinuous growth lines. J. Specimen (CAS 70401) with well−developed apertural fold, note the indented shell on the left. K. Holotype (CAS 70402). L. Smooth specimen (UCMP 555103) with excavated aperture.
Fig. 7 in Jurassic and Cretaceous gastropods from hydrocarbon seeps in forearc basin and accretionary prism settings, California
Fig. 7. Abyssochrysoid gastropod Paskentana spp. from Late Jurassic and Early Cretaceous seep carbonates in California, USA. A–C. Paskentana berryessaensis sp. nov. A. Holotype (UCMP 555098), small specimen with nodular sculpture from NW Berryessa (Tithonian; site 10). B. Paratype (UCMP 555099), specimen with beaded spiral cords from NW Berryessa (Tithonian; site 10). C. Paratype (UCMP 555100) from Bear Creek (Valanginian; site 4), specimen with spiral sculpture and fine axial growth increments. D–F. Paskentana globosa sp. nov. D. Paratype (UCMP 555101) from Little Indian Valley (Valanginian?; site 6). E. Holotype (CAS 70394), large specimen from Knoxville (Early Cretaceous?, site 9). F. Rubber cast of a last whorl, from Knoxville.
Fig. 6 in Jurassic and Cretaceous gastropods from hydrocarbon seeps in forearc basin and accretionary prism settings, California
Fig. 6. Abyssochrysoid gastropod Paskentana paskentaensis (Stanton, 1895) from Late Jurassic and Early Cretaceous seep carbonates in California, USA. A. Small specimen (CAS 70392) with strong scaly sculpture from Bear Creek (Valanginian; site 4); apertural (A1) and lateral (A2) views. B. Specimen (CAS 70393) with broad shoulder from Bear Creek (Valanginian; site 4). C. Specimen (UCMP 555097) with broad shoulder and almost smooth spiral sculpture, from Little Indian Valley (Valanginian?; site 6). D. Juvenile specimen (UCMP 555104) from Bear Creek (Valanginian; site 4), close−up on first whorls (D1) and entire specimen (D2). E. Isolated partial larval shell (UCMP 555105) from Bear Creek (Valaginian; site 4) that most likely belongs to Paskentana paskentaensis. F. Specimen (UCMP 154113) without shoulder and fine scaly sculpture, from Rice Valley (Hauterivian?; site 3). G. Specimen (UCMP 13701) without shoulder, from Wilbur Springs (Hauterivian; site 5). H. "Turbo" wilburensis Stanton, 1895 (pl. 12: 15), lectotype (USNM 23068) from Wilbur Springs (Hauterivian; site 5). I. "Turbo" paskentaensis Stanton, 1895 (pl. 12: 6), lectotype (USNM 23067) from Paskenta (Tithonian; site 2). J, K. "Turbo?" humerosus Stanton, 1895 from Wilbur Springs (Hauterivian; site 5). J. Lectotype (USNM 23072). K. Paralectotype (specimen illustrated by Stanton 1895: pl. 12: 10).
Fig. 4 in Jurassic and Cretaceous gastropods from hydrocarbon seeps in forearc basin and accretionary prism settings, California
Fig. 4. Late Jurassic and Early Cretaceous eucyclid Amberleya spp. from seep carbonates in California, USA. A–C. Amberleya dilleri Stanton, 1895, type specimens from Paskenta (site 2). A. Spire of juvenile specimen (USNM23074a). B. Spire of large specimen (USNM 23074b). C. Lectotype (USNM 23074c) showing the aperture. D. Amberleya cf. dilleri (UCMP 555090) from NW Berryessa (site 10). E–I. Amberleya morganensis (Stanton, 1895) from Rocky Creek (site 7). E. Lectotype (USNM 23071). F. Spire (CAS 70386) with two tuberculate spiral cords. G. View on flank and basal margin (CAS 70387). H. Spire (CAS 70388) with lower tuberculate spiral largely concealed by succeeding whorl. I. Specimen (CAS 70389) with narrow apical angle. F–I, rubber casts.
Fig. 3 in Jurassic and Cretaceous gastropods from hydrocarbon seeps in forearc basin and accretionary prism settings, California
Fig. 3. Hand sample and petrographic thin section (plane polarized light) occurrences of selected Mesozoic seep gastropod fossils, California, USA. A. Fossil coquina of Paskentana paskentensis from Bear Creek (site 4) carbonate pod. B. Thin section photomicrograph of Bathypurpurinopsis stantoni in clotted micrite with pore−filling fibrous cement, from Cold Fork of Cottonwood Creek (site 1). C. Longitudinal section through Paskentana paskentensis encased in early diagenetic (seafloor) anhedral yellow calcite cement (dark; cf. Campbell et al. 2002), with pores filled by lighter−colored fibrous cement, from Paskenta (site 2). D. Small individual of Paskentana paskentensis preserved in clotted micrite within serpulid worm tube; Bear Creek site (site 4).
Fig. 1 in Jurassic and Cretaceous gastropods from hydrocarbon seeps in forearc basin and accretionary prism settings, California
Fig. 1. Mesozoic (solid circles) and Cenozoic (open circles) seep carbonate occurrences, California, showing their broad geologic setting and overall geographic extent over ~130 m.y. and>600 km along the continental margin. Numbered sites indicate the 16 fossil gastropod−bearing deposits of this study. Relevant geologic features of the north−south trending, Mesozoic– Paleogene convergent margin include: belts of mélange, broken formation and ophiolites (Franciscan Accretionary Complex and Coast Range Ophiolite, CRO); siliciclastic forearc turbidites (Great Valley Group); and present−day root of the volcanic arc (Sierra Nevada Batholith). Geology simplified from the 1:2,500,000 Geologic Map of California (1966, U.S. Geological Survey and California Division of Mines and Geology). Appendix 1 lists locality data, ages and fossil lists for each of the 16 sites. 1, Cold Fork of Cottonwood Creek; 2, Paskenta; 3, Rice Valley; 4, Bear Creek; 5, Wilbur Springs; 6, Little Indian Valley; 7, Rocky Creek; 8, Foley Canyon; 9, Knoxville; 10, NW Berryessa; 11, W Berryessa; 12, E Berryessa; 13, Romero Creek; 14, Moreno Gulch; 15, Gravelly Flat; 16, Charlie Valley.
Fig. 2 in Jurassic and Cretaceous gastropods from hydrocarbon seeps in forearc basin and accretionary prism settings, California
Fig. 2. Stratigraphic distribution of the 16 fossil−bearing, seep carbonate deposits of this study (Fig. 1), correlated with petrofacies (Ingersoll, 1983, for Sacramento Valley), and a Buchia bivalve biostratigraphy (Tithonian through Valanginian stages; Jones et al., 1969, as modified by Bralower, 1990). Geologic time divisions (Gradstein et al. 2004) for each stage are shown to the nearest 1 m.y. Ages of these seep carbonate deposits are relatively poorly known, with most sites resolved to stage level only. A few others are even more poorly known, e.g., probable Early Cretaceous age, and one is more finely resolved to sub−stage level (i.e., Late Campanian). Tithonian and Valanginian sites comprise the majority of the gastropod−rich deposits, with relative ages constrained by a six species Buchia zonation. Hauterivian sites contain the seep−restricted brachiopod, Peregrinella whitneyi (see Campbell and Bottjer, 1995, for discussion of caveats with respect to using this genus to establish relative ages). Albian and younger Cretaceous sites are dated based on ammonite occurrences. See Appendix for complete fossil lists. Most deposits occur within forearc mudstone of the Great Valley Group, except for two sites (3, 5) associated with serpentinite (diapir) deposits. A further two (6, 16) are enclosed in accretionary prism rocks of the Franciscan Complex, and one (3) is in a Great Valley outlier within Franciscan rocks. Similar seep fossil assemblages and associated buchiids allow relative age correlations for these Franciscan−related deposits.
Fig. 5 in Jurassic and Cretaceous gastropods from hydrocarbon seeps in forearc basin and accretionary prism settings, California
Fig. 5. Late Jurassic and Early Cretaceous abyssochrysoids Hokkaidoconcha spp. and Abyssochrysos? giganteum sp. nov. from seep carbonates in California, USA. A–C. Hokkaidoconcha occidentalis (Stanton, 1895). A. Lectotype (USNM 23077) from Paskenta (Tithonian; site 2). B. Specimen (CAS 70391) with well−developed spiral sculpture from Wilbur Springs (Hauterivian; site 5). C. Specimen (UCMP 555091) with poorly developed spiral sculpture from NW Berryessa (Tithonian; site 10). D, E. Hokkaidoconcha tehamaensis sp. nov. from Paskenta (Tithonian; site 10). D. Holotype (UCMP 555092); apertural (D1) and lateral (D2) views. E. Paratype (CAS 70390), note fading axial ribs on flank. F, G. Hokkaidoconcha morenoensis sp. nov. from Moreno Gulch (Santonian; site 14) F. Holotype (LACMIP 13483) with well−developed axial ribs and spiral sculpture on base. G. Paratype (LACMIP 13484) with fading axial ribs on later whorls. H. Hokkaidoconcha bilirata sp. nov., holotype (UCMP 555093) from Wilbur Springs (Hauterivian; site 5). I. Hokkaidoconcha sp. (UCMP 555094) from NW Berryessa (Tithonian; site 10). J, K. Abyssochrysos? giganteum sp. nov. from E Berryessa (Lower Cretaceous; site 12). J. Holotype (UCMP 555095). K. Paratype (UCMP 555096).
Datasets and Codes for "Relative Moment Tensor Inversion for Microseismicity: Application to Clustered Earthquakes in the Cascadia Forearc"
<p>This Zenodo record contains the supplementary datasets and code for the paper titled "Relative Moment Tensor Inversion for Microseismicity: Application to Clustered Earthquakes in the Cascadia Forearc."<br><br></p> <p><strong>Datasets</strong></p> <ul> <li>phases.txt<br> Contains phases used for the event location and moment tensor inversion.<br> Format: ID, station, phase, year, month, day, secday<br> ID: Event identifier (same for all files)<br> station: Station name<br> phase: 1 for P-wave or 2 for S-wave<br> secday: Seconds in the day</li> <li>polarity.txt<br> Contains first motion P polarity used in the study.<br> Format: ID, station, polarity, trust, type<br> polarity: 1 for up or -1 for down<br> trust: Value between 0 and 1, indicating confidence level.<br> type: E for emergent or I for impulsive<br> Note that the arrival type has been automatically assigned and not double-checked.</li> <li>relocation.txt<br> HypoDD relocation file (see hypoDD manual for full description).<br> Format: ID, LAT, LON, DEPTH, X, Y, Z, EX, EY, EZ, YR, MO, DY, HR, MI, SC, MAG, NCCP, NCCS, NCTP, NCTS, RCC, RCT, CID</li> <li>MT_soluton.txt<br> Contains all double-couple moment tensor solutions.<br> Format: ID, strike, dip, rake, mag, kagan_std<br> mag: Moment magnitude (Mw); "None" if the event is not considered stable<br> kagan_std: Quality interpretation of the moment tensors using Kagan angle standard deviation, as described in the main paper.</li> </ul> <p> </p> <p><strong>Codes</strong></p> <p>Future development of the relative moment tensor algorithm will be conducted on GitHub as part of the Marie-Sklodowska-Curie Action relMT funded by the European Union (https://github.com/wasjabloch/relMT)</p> <p>Here are the files in Codes.zip:</p> <ul> <li>synthetics.zip<br> Contains codes for performing and testing synthetic moment tensor inversion.</li> <li>relMT.zip<br> Contains the code for performing moment tensor inversion on real data.</li> <li>intrustion.txt<br> Contains instructions for setting up and running the codes.</li> <li>environment_MAC.yml<br> File to create the python environment on a MAC or LINUX machine.</li> <li>environment_WINDOWS.yml<br> File to create the python environment on a WINDOWS machine.</li> </ul>
Dataset for submitted manuscript "Temperatures and cooling rates recorded by the New Caledonia ophiolite: implications for cooling mechanisms in young forearc sequence"
<p>original dataset for the manuscript "Temperatures and cooling rates recorded by the New Caledonia ophiolite: implications for cooling mechanisms in young forearc sequences" submitted to the journal "G3 Geophysics, Geochemistry, Geosystems"</p>
Three-dimensional offsets of geomorphic piercing lines displaced by the quaternary-active Beaufort range fault, northern Cascadia forearc, BC, Canada
Open the record for dataset details and reuse information.
Barium isotope variation during fluid-rock interaction at forearc depths: evidence from the high-pressure fluid-metasomatized rocks in the Eastern Alps
<p><a name="OLE_LINK7"></a><a name="OLE_LINK1"></a><span><span>The supporting information presents the analytical methods of whole-rock major-trace element compositions and Mg–Fe isotope compositions , as well as whole-rock major-trace elements and Fe–Mg–Sr isotope data</span></span><span><span>.</span></span></p>
Dataset related to Balazs et al. The dynamics of forearc – back-arc basin subsidence: numerical models and observations from Mediterranean subduction zones
<p>Additional model data to publication by Balazs et al. The dynamics of forearc – back-arc basin subsidence: numerical models and observations from Mediterranean subduction zones</p>
Data set for the paper "Temperatures and cooling rates recorded by the New Caledonia ophiolite: implications for cooling mechanisms in young forearc sequences"
<p>Data set for the paper "Temperatures and cooling rates recorded by the New Caledonia ophiolite: implications for cooling mechanisms in young forearc sequences" by Secchiari et al.</p>
Supporting information for "Diverse P-T-t paths reveal high-grade metamorphosed forearc complexes in NW China"
<p>The supporting information includes raw chemical compositions of minerals, bulk-rock major and trace elements of rocks, and SIMS U-Pb isotopic analysis data of metamorphic zircons for "Diverse P-T-t paths reveal high-grade metamorphosed forearc complexes in NW China" by Wang et al.</p>
Data set for the paper "Temperatures and cooling rates recorded by the New Caledonia ophiolite: implications for cooling mechanisms in young forearc sequences"
<p>Mineral data set for the paper "Temperatures and cooling rates recorded by the New Caledonia ophiolite: implications for cooling mechanisms in young forearc sequences"</p>
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