A comparative study of uranium–thorium accumulation at the western edge of the Arabian Peninsula and mineral deposits worldwide

Dill, Harald G.

doi:10.1007/s12517-009-0107-4

Cited by 19 publications

(8 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These samples are likely to suffer both from disequilibrium in radioisotope decay chains and post-depositional uranium enrichment via carbonate re-precipitation (Faure, 1986;Krbetschek et al, 1994;Olley et al, 1996;Dill, 2011). This is particularly a problem when dose rates are calculated from elemental concentrations as they have been in this study, due to the assumptions underlying the conversion factors (Guérin et al, 2011).…”

Section: Chronologymentioning

confidence: 97%

Middle-late Quaternary palaeoclimate variability from lake and wetland deposits in the Nefud Desert, Northern Arabia

Parton

Clark-Balzan

Parker

et al. 2018

Quaternary Science Reviews

View full text Add to dashboard Cite

Records of former lake and wetland development in present day arid/hyper-arid environments provide an important source of information for palaeoclimatic and palaeoenvironmental studies. In Arabia, such records are typically confined to eccentricity-modulated insolation maxima, and are often spatially and temporally discontinuous. Here we present records from a single locality in Northern Arabia of wetter interludes during both global interglacial and glacial conditions, providing a unique opportunity to examine the nature of these events in a common setting. At Jubbah, in the southern Nefud Desert, lake and wetland deposits reveal the repeated formation of a water body within a large endorheic basin over the past ca. 360 kyr. Lake/wetland formation occurred during MIS 11/9, 7, 5, 3 and the early Holocene, assisted by local topographic controls, and spring recharge. Palaeoenvironmental and palaeoecological data reveal the existence of a large still water body formed during either MIS 11 or 9 (ca. 363 ka), and basin wide alluviation followed by lake formation during MIS 7 (ca. 212 ka). During MIS 5e (ca. 130 ka) a large freshwater lake occupied the basin, while during MIS 5a (ca. 80 ka) the basin contained a shallow wetland and freshwater lake complex. Lake/wetland formation also occurred during early MIS 3 (ca. 60 ka), at the Terminal Pleistocene-Holocene transition (ca. 12.5 ka), and the early-middle Holocene (ca. 9-6.5 ka). Phases of lake and wetland development coincided with human occupation of the basin during the Middle Palaeolithic, Epipalaeolithic and Neolithic periods, highlighting the significance of the region for early demographic change.

show abstract

Section: Chronologymentioning

confidence: 97%

Middle-late Quaternary palaeoclimate variability from lake and wetland deposits in the Nefud Desert, Northern Arabia

Parton

Clark-Balzan

Parker

et al. 2018

Quaternary Science Reviews

View full text Add to dashboard Cite

show abstract

“…In waterlain deposits, some of the assumptions generally used for such calculations may be invalid, due to chemical conditions at deposition (Krbetschek et al, 1994). Even more concerning is recirculation of groundwater through carbonate and evaporite-rich deposits, which can lead to significant post-depositional alterations (Dill, 2011).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Resolving problematic luminescence chronologies for carbonate- and evaporite-rich sediments spanning multiple humid periods in the Jubbah Basin, Saudi Arabia

Clark-Balzan

Parton

Breeze

et al. 2018

Quaternary Geochronology

View full text Add to dashboard Cite

show abstract

“…Tetravalent uranium (U 4+ ) can sub sti tute for Ca in the ap a tite lat tice and ac cumu late in car bo na ceous ma te rial ac com pa ny ing phos phates (Baturin and Kochenov, 2001; Dill, 2011 and ref er ences therein). Ma rine phosphorite de pos its con tain U usu ally be low 100 ppm, whereas or ganic phosphorites can con tain U up to 600 ppm (Dill and Kantor, 1997;Dill, 2011). The most im por tant rep re sen ta tive of U de pos its in ma rine phosphorites oc curs in Khouribga, Mo rocco (Oulad Abdoun Ba sin), and in or ganic phosphorites at Melovoe, Kazakhstan (Dill, 2011).…”

Section: Fig 4 Depth Vari a Tion Of (A) To Tal Or Ganic Car Bon Conmentioning

confidence: 99%

“…Ma rine phosphorite de pos its con tain U usu ally be low 100 ppm, whereas or ganic phosphorites can con tain U up to 600 ppm (Dill and Kantor, 1997;Dill, 2011). The most im por tant rep re sen ta tive of U de pos its in ma rine phosphorites oc curs in Khouribga, Mo rocco (Oulad Abdoun Ba sin), and in or ganic phosphorites at Melovoe, Kazakhstan (Dill, 2011). The pos i tive cor re la tion be tween U and P in the Walchia shale is also an indi ca tor of re duc ing con di tions dur ing U ac cu mu la tion, since U is able to in cor po rate phos phates in a reductive me dium (Baturin and Kochenow, 2011 and ref er ences therein) as con firmed here by high HI val ues ( Fig.…”

Section: Fig 4 Depth Vari a Tion Of (A) To Tal Or Ganic Car Bon Conmentioning

confidence: 99%

Organic and inorganic geochemical study of the Lower Permian Walchia shale of the Intrasudetic Basin (SW Poland)

Bilkiewicz

Pieczonka

Piestrzyński

2018

View full text Add to dashboard Cite

As so ci ate ed i tor: Stanis³aw Wo³kowicz The Lower Perm ian Walchia shale of the Intrasudetic Ba sin is lac us trine sed i ment en riched in or ganic mat ter and base metals. Rock-Eval geo chem i cal anal y sis was con ducted on 110 drill-core rock sam ples of the Walchia shale in or der to char acter ize the quan tity, ge netic type and ma tu rity of dis persed or ganic mat ter. Con cen tra tions of U, Th, Cu, Ni, V, Pb, Zn, Co, Mo, Cr, P, S and Fe were de ter mined and mi cro scopic stud ies to rec og nize min eral com po si tion were per formed on se lected sam ples. Or ganic mat ter of the Walchia shale is im ma ture and dom i nated by ter res trial type III kerogen with an ad mix ture of plank tonic type II kerogen. The Walchia shale is gen er ally poor source rock, but some parts of the pro file ex hibit good and even ex cel lent hy dro car bon po ten tial. The av er age con cen tra tions of an a lysed met als are higher than the av er age re ported for black shales. The con cen tra tions of base met als do not cor re late with TOC con tents, sug gest ing that their pres ence is asso ci ated with in or ganic fea tures of the Walchia shale or they could have been re lated pri mar ily to or ganic mat ter which was sub se quently ox i dized and al tered. Ura nium may be partly as so ci ated with phos phates. Re sults of mi cro scopic in ves ti gations re vealed the lack of de tect able ra dio ac tive min er als, abun dance of framboidal py rite, and prev a lent ga lena, sphalerite and chal co py rite.

show abstract

A comparative study of uranium–thorium accumulation at the western edge of the Arabian Peninsula and mineral deposits worldwide

Abstract: Jordan, located at

Cited by 19 publications

References 48 publications

Middle-late Quaternary palaeoclimate variability from lake and wetland deposits in the Nefud Desert, Northern Arabia

Middle-late Quaternary palaeoclimate variability from lake and wetland deposits in the Nefud Desert, Northern Arabia

Resolving problematic luminescence chronologies for carbonate- and evaporite-rich sediments spanning multiple humid periods in the Jubbah Basin, Saudi Arabia

Organic and inorganic geochemical study of the Lower Permian Walchia shale of the Intrasudetic Basin (SW Poland)

Contact Info

Product

Resources

About