Abstract Paleogene syn‐rift successions in the South China Sea are poorly understood and systematic provenance analysis, which could provide clues to their history, is lacking. Here we report 409 new concordant U‐Pb ages from detrital zircons separated Wenchang, Enping, Zhuhai formations Zhu 1 depression, Pearl River Mouth Basin. The data, combined with published age data region, document changes of successions. Detrital Eocene Wenchang Formation unimodal, Jurassic‐Cretaceous (180–80 Ma)...

Abstract Kansas, like other parts of the central U.S., has experienced a recent increase in seismicity. Correlation these events with brine disposal operations suggests pore fluid pressure increases are reactivating preexisting faults, but rigorous evaluation at injection sites is lacking. Here we determine suitability CO 2 into Cambrian‐Ordovician Arbuckle Group for long‐term storage and Mississippian reservoir enhanced oil recovery Wellington Field, Sumner County, Kansas. To potential...

S -wave anisotropy observations in the U.S. midcontinent provide direct evidence of pore fluid pressure–induced earthquakes.

Abstract Researchers have long suspected a source‐to‐sink link between the Yangtze Block (and/or North China Block) and Eocene‐Miocene passive margin strata in Taiwan, various models been proposed to explain similarities provenance presence of Archean grains. The East Sea Shelf Basin, whose evolution has neglected most models, resides potential mainland source regions sediment sink occupies corridor through which would transported. Here we present 378 new concordant detrital zircon U–Pb ages...

Abstract The Arbuckle Group aquifer is the principal disposal zone for oil and gas field brines hazardous/nonhazardous wastewater across U.S. midcontinent traditionally viewed as an infinite capacity aquifer. Thousands of wells annually dispose hundreds millions barrels into Kansas Oklahoma, but direct links between injection recent increases in seismicity have been hindered by a lack pressure data Group. Here we present newly compiled set 49 that provides unique perspective on aquifer's...

Abstract The Late Mississippian was a critical time interval in Laurentia's history, marking the transition from carbonate deposition on stable platform, during Early to Middle Mississippian, extensive clastic Pennsylvanian Permian associated with Laurentia‐Gondwana collision. In U.S. midcontinent, Chesterian incised valley fill (IVF) systems that developed within carbonate‐dominated platform provide new insights patterns and drivers of continental‐scale sediment dispersal this transitional...

We use apatite and zircon (U-Th)/He thermochronometry to evaluate space-time patterns tectonic drivers of Miocene Pliocene deformation within the Death Valley area, eastern California. Zircon He ages from footwall Amargosa–Black Mountains detachment in Black record continuous cooling exhumation 9 3 Ma. Thermal modeling data central suggests that this took place during two intervals: a period rapid 10 6 Ma, followed by slower (<5 mm/yr) since Cumulative is estimated be 10–16 km. Paleodepth...

New mapping combined with fault-slip and thermochronological data show that Middle Miocene to recent extension exhumation of the Slate Range, eastern California, is produced by active Searles Valley fault system Range detachment, an older low-angle normal fault. Offset rocks record a ∼9 km west-directed over past ∼14 m.y. for zones. (U-Th)/He apatite cooling ages samples from central southern indicate footwall began ca. 14 Ma; we interpret this as age initiation motion on detachment. This...

We use apatite and zircon (U-Th)/He thermochronometry to evaluate the timing, magnitude, spatial pattern of Miocene strain within Beaver Dam Mountains, Tule Springs Hills, Mormon Mountains southwestern Utah southeastern Nevada (USA). The region is host three major low-angle structures, Castle Cliffs, Springs, Peak detachments, origin role which in regional extension are vigorously debated. analyzed 36 samples collected from Precambrian basement gneisses Paleozoic Jurassic siltstones...

The total simulated P50 capacity of the 10 sites is 780 million tonnes supercritical CO2, with some sites, such as Cutter Field in South Western Kansas, providing very low storage (∼ 1 M tonnes) and others, Dexter central 121 CO2 storage. Most exception could be considered commercial scale reservoirs from a perspective available pore space. However, recent increase earthquakes Central Kansas associated large volume brine disposal potentially challenge this assessment.

Abstract Baseline geologic characterization, model development, studies of oil composition and properties, miscibility pressure estimations, geochemical reservoir modelling were performed. In March 2015 the injection well (class II) KGS 2-32 was drilled, cored, logged through an entire anticipated interval. Whole core samples obtained tested for porosity permeability, relative capillary pressure. The Drill Stem Test (DST) also conducted to estimate interval permeability pore-pressure. After...

Summary In the past two years, Kansas has seen a two-orders-of-magnitude increase in rate of seismic activity south-central part state relative to nearly forty years instrumented monitoring. The elevated seismicity follows recent rise oil and gas production associated disposal produced formation water. strong spatial temporal correlation between disposed fluid volumes, injection well locations interval, earthquake epicenters suggests that may be induced. Key informed regulatory decisions are...