Abstract When and how the collision between India‐Asia occurred continue to be debated. We report new paleomagnetic data ( D s = 158.8°, I 7.8°, k 81.3, α 95 5.1°, N 11 sites) from limestone of Zongpu Formation Member in Tingri, which indicate that Tethyan Himalaya was situated at 3.9 ± 2.6°S during 62‐59 Ma. This implies Greater India ∼900 km did not break off India, left a ∼2,000 Neo‐Tethys Ocean challenges prevailing hypothesis initial India–Asia this period. The drift rate plate, with an...

Abstract Deep learning (DL) is capable of complex representations data by discovering hierarchical patterns and features in the without need for manual feature engineering. Due to recent advances processing power availability large datasets, DL has become increasingly popular geotechnical site investigation characterize soil properties. This paper presents examples practical application properties US Atlantic Outer Continental Shelf (OCS) soils, including piezocone penetration test...

Abstract The forms of the margins Lhasa terrane and Tethyan Himalaya prior to collision India Eurasia as constrained by paleomagnetism are ambiguous due disordered Cretaceous paleomagnetic data from central counterclockwise rotation Indian plate during Cretaceous. This ambiguity has induced controversy over processes suturing closure Neo-Tethys Ocean. We obtained a set high-quality Late terrane, which, integrated with reliable Paleogene sets other parts Himalaya, confirmed that southern...

The continuous bottom-simulating reflection (BSR) is commonly considered to mark the base of gas hydrate stability zone. Below this depth, gives away free or water filling with pore spaces sediments. We integrated and analyzed seismic data collected in 2008, logging-while-drilling (LWD) coring results acquired by Fugro Voyager 2015 Shenhu area on northern slope South China Sea. Based well-log correlation, a BSR typical characteristics hydrates was identified at 237 m, below mudline (BML)....

This review is conducted to assess the effectiveness of laser extinction method (LEM) calibrated laser-induced incandescence (LII) quantitatively determine soot volume fraction in flames. article mainly focuses on discussion and analysis existing experimental results typical co-flow laminar diffusion Initially, a brief introduction background application sooting tendency flames by using combination LII LEM presented. Then, general theoretical backgrounds techniques used for diagnostics...

Gas hydrate can be interpreted from seismic data through observation of bottom simulating reflector (BSR). It is a challenge to interpret gas without BSR. Three-dimensional qualitative and quantitative interpretations were used characterize distribution concentration in the eastern Green Canyon area Gulf Mexico, where BSR absent. The combination interpretation reduces ambiguities estimation identification hydrate. Sandy deposition faults are qualitatively amplitude data. 3D acoustic...

Bottom-simulating reflections (BSRs) in seismic data have been widely accepted to indicate the base of methane gas hydrate stability zone (MGHSZ), and free was thought exist only below it. However, real geologic systems are far more complex. We evaluated results 3D seismic, logging while drilling, situ, coring measurements at a venting system Shenhu area South China Sea. Our studies reveal that has migrated upward through thermogenic into MGHSZ become part system. Seismic amplitude anomalies...

Hydrate-bearing sands and shallow nodular hydrate are potential energy resources geohazards, they both need to be better understood identified. Therefore, it is useful develop methodologies for modeling simulating elastic constants of these hydrate-bearing sediments. A gas-hydrate rock-physics model based on the effective medium theory was successfully applied dry rock, water-saturated rock. The used investigate seismic interpretation capability sediments in Gulf Mexico by computing...

Abstract The Bottom Simulating Reflector (BSR) has been used extensively to interpret possible gas hydrate from seismic data. However, a BSR is not found in the Green Canyon (GC) 955 of Gulf Mexico, where deposits were predicted and confirmed through drilling. stratigraphic facies hydrates are indicated by Logging Wile Drilling (LWD) drilling GC955 have complex amplitude response high negative positive amplitudes showing both continous discontinous character with different modes stacking...

An analysis of amplitude variation with offset (AVO) observations is applied in hydrate-bearing sands, free-gas-charged and hydrate-over-gas sands. The elastic model parameters (Vp, Vs, density) are obtained from well log measurements a rock physics model. study suggests that presence gas hydrate free affect the AVO shallow unconsolidated sediments containing gas. Low-concentrated low-concentrated overlying have weak behaviors while highly-concentrated strong behaviors. Both Class I...

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2008A rock physics model for hydrates bearing sediments of near surfaceAuthors: Zijian ZhangZijian ZhangSearch more papers by this authorhttps://doi.org/10.1190/1.3059393 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Gas presented as form segregated bodies have been observed on shallow subsurface sediments. However, most gas hydrate models...

Abstract The Cenozoic tectonic evolution of the southeastern edge Tibetan Plateau is interpreted in terms two alterative dynamic mechanisms: lateral extrusion coherent lithospheric blocks and viscous lower crustal flow. To contribute to this debate, we conducted a magnetostratigraphic study Early Miocene sedimentary strata Gengma Basin, northern part Shan‐Thai Block (STB). results show that variations deposition rate were synchronous with clockwise rotation during ∼18.05–15.93 Ma, indicating...

This paper analyzes amplitude behavior of gas hydrate from stacked seismic data, based on rock physics properties hydrate‐saturated sediments, saturated and water sediments. Gas is likely to occur in suitable occurrence environment. Velocity sediments increases as replaces pore space the sediment. In contrast, velocity filling sediment decreases. The different patterns that consist low concentrated hydrate, high and/or produce Dim out Bright spots. two indicators are illustrated a 3D data...