Elevated K/T palaeotemperatures throughout Nortwest England: three kilometres of Tertiary erosion?

Lewis, Cherry; Green, Paul F.; Carter, Andrew; Hurford, Anthony J.

doi:10.1016/0012-821x(92)90012-k

Cited by 140 publications

(80 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…White & Lovell, 1997). The timing and magnitude of the second event is very poorly constrained at present, and while it is generally assigned a postMiddle Miocene age, its existence must be regarded as somewhat speculative (Lewis et al 1992;Cope, 1994Cope, , 1998Green et al 1993Green et al , 1999Allen et al 2002). Allen et al (2002) quantitatively evaluated the postVariscan thermal and denudational history of Ireland using an extensive new apatite fission-track dataset derived from surface samples.…”

Section: B Problemsmentioning

confidence: 99%

Evidence for post-early Eocene tectonic activity in southeastern Ireland

et al. 2003

View full text Add to dashboard Cite

The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Abstract -The role played by Cenozoic deformation in denudation and landscape development in Ireland has historically been difficult to assess because of the lack of widespread pre-glacial Cenozoic deposits onshore. Here we combine analysis of apatite fission-track data and geomorphic observations to place constraints on the timing, kinematics and magnitude of onshore deformation in southeastern Ireland. Relationships between apatite fission-track central age and elevation for samples from the Wicklow and Blackstairs Mountains and Tullow Lowland suggest that these rocks record an exhumed apatite partial annealing zone, which after cooling was dismembered by differential vertical displacements of up to several hundred metres. We use inverted models of sample thermal history to show that samples across the region experienced very similar thermal histories up to and including a cooling event in late Paleocene or early Eocene time. This effectively rules out strongly spatially heterogeneous denudation, and implies that differential rock uplift occurred in post-early Eocene time.The central age-elevation relationships define at least three spatial domains with internally consistent apatite fission-track data, separated by known faults or topographic escarpments. Geomorphic analysis of these structures shows that patterns of catchment incision and sinuosity, as well as the presence of antecedent drainage, are best explained by differential vertical displacements at or near the domain boundaries. The kinematics and magnitudes of these displacements are consistent with those implied by the apatite fission-track results, and are compatible with other examples of known Cenozoic deformation from Ireland and the adjacent continental margin.

show abstract

Section: B Problemsmentioning

confidence: 99%

Evidence for post-early Eocene tectonic activity in southeastern Ireland

et al. 2003

View full text Add to dashboard Cite

show abstract

“…Chadwick, Kirby & Baily (1994) used this approach in the Lake District Block, and estimated postCretaceous exhumation of the central Lake District was typically less than 1750 m, compared with estimates of around 3 km by Lewis et al (1992). However, Bray, Green & Duddy (1992) argued that a heat flow-based approach to thermal history reconstruction is subject to considerable uncertainty.…”

Section: Apparent Exhumation In the Cleveland Basin/east Midlands Shelfmentioning

confidence: 99%

Determining apparent exhumation from Chalk outcrop samples, Cleveland Basin/East Midlands Shelf

Menpes

Hillis

1996

Geol. Mag.

View full text Add to dashboard Cite

-Porosity measurements of 22 Upper Cretaceous Chalk samples, and mean Chalk porosities derived from sonic logs in three wells, were used to quantify apparent exhumation (height above maximum burial-depth) in the onshore Cleveland Basin/East Midlands Shelf. Late Cretaceous/Tertiary exhumation of the East Midlands Shelf resulted in the removal of 1.2 km of section near the coast and more than 2 km of section inland, to the west. The southern margin of the Cleveland Basin was exhumed by 2 km, and exhumation increases northwards towards the recognized inversion axis running east-west along the basin's centre. The northwards increasing exhumation associated with the east-west trending inversion axis of the Cleveland Basin is superimposed upon the regional westward trend of increasing exhumation of eastern England. These two trends control the outcrop distribution of the Upper Cretaceous Chalk in the Cleveland Basin/East Midlands Shelf.

show abstract

“…Much of this research has focused on the East Irish Sea Basin (EISB), where early applications of apatite fission-track analysis (AFTA ® ) revealed that samples close to the sea bed today had resided at elevated palaeotemperatures in excess of 100°C prior to early cooling. This cooling was interpreted in terms of the removal of a thick (up to 3 km) cover of Mesozoic sediments (Lewis et al 1992). Subsequent work in this basin however, aided by both a substantially enlarged dataset and methodological advances, has demonstrated the importance of advective fluid-related heating and periods of elevated basal heat flow, implying that the elevated palaeotemperatures recorded by AFTA cannot be interpreted in terms of heating due solely to deeper burial (Green et al 1997;Green 2002;Holford et al 2005a).…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, considerable attention has been paid to the late Mesozoic-Cenozoic exhumation history of the British Isles (Lewis et al 1992;Brodie & White 1994;Cope 1994;Hillis 1995;Japsen 1997;White & Lovell 1997;Rowley & White 1998;Green et al 2002;Ware & Turner 2002;Holford et al 2005b). A great deal of this discussion has been presented in terms of Palaeogene uplift, which has been assumed to represent the dominant exhumation episode.…”

Section: Introductionmentioning

confidence: 99%

“…This imbalance is typified by studies of the exhumation history of the Irish Sea basin system. Numerous workers have cited this suite of intraplate sedimentary basins as the locus of Cenozoic exhumation across the British Isles, and indeed, the NW European continental shelf (Lewis et al 1992;Chadwick et al 1994;Brodie & White 1995;White & Lovell 1997;Jones et al 2002). Many workers have suggested that the main phase of exhumation in the Irish Sea occurred during early Palaeogene times, with the uplift caused by the isostatic response to magmatic underplating of the lower crust, associated with the initiation of the Iceland Plume (Brodie & White 1994;White & Lovell 1997;Rowley & White 1998;Al-Kindi et al 2003;Tiley et al 2004).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation