Tertiary mafic dikes and sills intrude coal-bearing formations of the raton basin this study investigates the role of intrusions in generating methane from coal coal samples at four different outcrops were analyzed by vitrinite reflectance, carbon isotopes and petrography. The geometry and distribution of planar igneous bodies (ie sheet intrusions), such as dykes, sills, and inclined sheets, has long been used to determine emplacement mechanics, define melt source locations, and reconstruct palaeostress conditions to shed light on various tectonic and magmatic processes. Spanish peaks wilderness, which lies within the raton basin, is characterized by numerous mid-tertiary igneous intrusions into the late cretaceous and early tertiary age basin sediments (figure 13. Simple one-dimensional thermal models for cooling igneous sheets, combined with published estimates of the kinetics of methane-generating reactions, indicate that methane production will be extensive within a zone corresponding to one intrusion half-width, and significant out to more than one full intrusion width. In north-central new mexico, co2-rich gases are present within pennsylvanian and lower permian sandstones in the vicinity of large igneous intrusions in the las vegas basin.
New mexico geological society there are approximately 2,150 mi within the area of the raton basin as defined by the trinidad sandstone igneous intrusion. Potential for a basin-centered gas accumulation in the raton basin, colorado and new mexico 11 figure 7 approximate depths (in hundreds of feet) to the top of the trinidad sandstone. These intrusions took place within the cuchara formation (tertiary) of the raton basin east and west spanish peaks seen from goemmer butte the east peak (left) is 12,683 feet (3866 m), and the west peak is 13,626 feet (4183 m.
Chronologic, geochemical, and isotopic framework of igneous rocks within the raton basin and adjacent rio grande rift, south-central colorado and northern new mexico . Igneous intrusions, especially when interpreting from derivatives (figure 2e) in these data, the main nw-se trend is well recognized, and the perpendicular trend is strongly suggested. Raton basin, elevated occurrences of light ree in coals and coaly shales are found close to k-t boundary this boundary is defined by a thin claystone (tonstein) layer, (izett, 1990. Figure 10 shows the effect of igneous intrusions on coal seams and methane emission as already described by cooper for the raton basin sills could be important for regional methane emission under thermal alternation of these intrusions, which is due to the large amount of coal that is intruded and metamorphosed by intrusions.
Read coal metamorphism by igneous intrusion in the raton basin, co and nm: implications for generation of volatiles, international journal of coal geology on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Thin, sheet intrusions within the raton basin were responsible for increasing coal rank on a local scale the frequent intrusion of mafic sills into the coal has resulted in a very large volume of coal having been altered by the intrusions, and also in significant methane generation. Raton basin—the raton basin of northeastern new mexico and southeastern colorado is a laramide structural basin bounded on the west by the sangre de cristo uplift, on the north by the wet mountains uplift and apishapa arch, and on the east by the sierra grande arch. Besides spanish peaks, several other significant intrusions are present along the axis and western portion of raton basin, including silver mountain, mount maestas, and white peaks according to penn and lindsey (1996), three distinct groups of dikes exist in the raton basin of southern colorado.
The study area is geologically located on the northern edge of the raton basin, bound on the west by the sangre de cristo mountains and on the east by the wet mountains and the apishapa arch (figure 1. And eastern parts of the las vegas basin, on the eastern flank of the raton basin, on the sierra grande uplift, and in the san luis basin there are few state trust lands on the. The colorado plateau, also known as the colorado plateau province, is a physiographic and desert region of the intermontane plateaus, roughly centered on the four corners region of the southwestern united states. The resistance to erosion of the igneous intrusions and the metamorphic aureole of the spanish synorogenic sediments of the raton basin around the spanish peaks. They found that sheet intrusions within the raton basin were responsible for increasing coal rank and resulted in signiﬁcant methane generation yao et al (2011) found that the.
Extrusive igneous rocks form during lava flows and the like, while intrusive igneous rocks form in, well, intrusions underground because they cool so slowly, intrusive rocks can form larger crystals, while extrusive rocks tend to have much finer crystal structures, if any. Tang xiao‐yin, zhang gong‐cheng, liang jian‐she, yang shu‐chun, rao song and hu sheng‐biao, modelling of thermal effects of igneous intrusions on the temperature field and organic maturity in the changchang sag, qiongdongnan basin, south china sea, chinese journal of geophysics, 57, 2, (219-229), (2014. The raton basin is an elongate, asymmetric basin in southeastern colorado and northeastern new mexico, analogous to other rocky mountain structural- stratigraphic basins associated with the rocky mountain laramide orogenic belt.
Raton basin-sierra grande uplift province-----4 petroleum potential of wilderness lands in colorado peaks tertiary igneous intrusions here, cretace. On the southeast side is the raton basin with a quiet but still active volcanic field on the northeast side are the wet mountains and the front range, areas of pre-cambrian rock raised up during the colorado orogeny some 17 billion years ago. Presentation really targeted toward the raton basin as equates to the hot spot within the basin itself we think totally eliminated by an igneous intrusion.