In:
Quaternary Research, Cambridge University Press (CUP), Vol. 52, No. 3 ( 1999-11), p. 293-299
Abstract:
New stable isotope analyses on molluscan shells from a long core drilled in the crater lake of Valle di Castiglione, near Rome, extended the investigated portion of the core to 37 m. The succession of δ 18 O‰ values in the core interval 37–2.3 m ranges from −2.8 to +6.9‰ with only six samples below 0‰ (PDB) . These results point to arid climatic phases coupled with the high measured δ 18 O values of the biogenic carbonate. In contrast, depleted 18 O samples correspond to wet climatic periods, in agreement with a strong evaporative control on the lake water isotopic composition. The 13 C content of the shells shows sharp changes controlled by the dissolved inorganic carbon isotope budget. Isotopic data suggest that the whole body of water behaved as a closed system, thus resembling lacustrine systems located in arid and semiarid regions where hydrological control dominates the geochemical parameters.
Type of Medium:
Online Resource
ISSN:
0033-5894
,
1096-0287
DOI:
10.1006/qres.1999.2077
Language:
English
Publisher:
Cambridge University Press (CUP)
Publication Date:
1999
detail.hit.zdb_id:
1471589-2
detail.hit.zdb_id:
205711-6
SSG:
13
SSG:
14
