Laser ablation in situ U-Pb dating and its application to diagenesis-porosity evolution of carbonate reservoirs

Geochemical Characteristics and Their Geological Significance of Lower Cambrian Xiaoerblak Formation in Northwestern Tarim Basin, China

“…The low order degree (<0.7) reflects that dolomitization was characterized by rapid replacement and rapid crystal growth at a low temperature. The ages of the five samples of host microbial dolomites determined by U-Pb dating are within the Cambrian age range, which may indirectly indicate that dolomitization occurred in the early diagenetic stage [37]. In addition, based on the fact that most of the samples are mainly micritic and silty dolomites with the original microbial and grain textures preserved, it can be judged that the Xiaoerblak Formation dolomite is the product of dolomitization in the penecontemporaneous-early diagenetic stage under a relatively low temperature, and the main dolomitization fluid was high salinity seawater.…”

“…Laser ablation in-situ U-Pb dating of carbonate is an effective technique for determining the age of host rocks and cements of ancient carbonate rocks [37]. As shown in Table 4 and Figure 8, the ages of all carbonate cements were younger than those of host rocks; it shows that the test results conform to the sequence of diagenesis and are relatively reliable.…”

In situ U-Pb Dating of Calcite from the South China Antimony Metallogenic Belt

“…Accordingly, at the highest mass end of collector array of the Nu Plasma II MC-ICPMS, we employ an ETP (electron multiplier) discrete dynode multiplier dedicated to static measurement of low signal 238 U. Such discrete dynode multiplier is characterized by higher sensitivity (100 mm, 3 J/cm 2 , 10 Hz; 238 U > 500000 cps/ppm, 207 Pb blank = 10-100 cps) with $3-10 times higher than that of Q-ICP-MS (Liu et al, 2019;Shen et al, 2019;Cheng et al, 2020). Taking the advantage of high sensitivity and static analysis, our employment of LA-MC-ICPMS could achieve superior internal error (i.e.…”

“…1 ppb Pb) (Woodhead et al, 2006;Li et al, 2014;Roberts and Walker, 2016;Goodfellow et al, 2017;Nuriel et al, 2017;Salih et al, 2020). It potentially targets and utilizes endmember m ( 238 U/ 204 Pb) domains, along with high-n datasets (Shen et al, 2019;Roberts et al, 2020), leading to an improvement in precision on the regressed age, and thus offers a new way to date hydrothermal ore deposits. Antimony (Sb) is one of the critical metals and commonly found in epigenetic hydrothermal ore deposits (Seal et al, 2017).…”

LA‐ICP‐MS U–Pb dating of calcite cement in Upper Triassic tight‐gas sandstone reservoirs, western Sichuan Basin, SW China

“…The recent development of laser ablation inductively coupled plasma‐mass spectrometry (LA‐ICP‐MS) calcite U–Pb dating provides unique advantages including in situ analyses of micron‐sized carbonate minerals and rapid data acquisition (Li, Parrish, Horstwood, & McArthur, 2014; Roberts et al, 2017; Yokoyama et al, 2018). This has been applied widely to constrain the absolute timing of various geological events, such as carbonate diagenesis (Brigaud, Andrieu, Blaise, Haurine, & Brarbarand, 2021; Godeau et al, 2018; Lawson et al, 2018; Macdonald et al, 2019; Mangenot, Gasparrini, Gerdes, Bonifacies, & Rouchon, 2018; Mueller et al, 2020; Pan et al, 2020; Shen et al, 2019), brittle deformation (Beaudoin, Lacombe, Roberts, & Koehn, 2018; Goodfellow, Viola, Bingen, Nuriel, & Kylander‐Clark, 2017; Hansman, Albert, Gerdes, & Ring, 2018; Karabacak et al, 2019; Nuriel et al, 2019; Roberts & Walker, 2016), hydrothermal alteration (Coogan, Parrish, & Roberts, 2016; MacDonald et al, 2019), hydrocarbon migration and charge in petroleum systems (Holdsworth et al, 2019; Rochelle‐Bates et al, 2020) and geofluid events (Brigaud et al, 2020; Parrish, Parrish, & Lasalle, 2018; Roberts & Walker, 2016; Yang, Liu, et al, 2021; Yang, Wu, et al, 2021).…”