Comparison of nickel and vanadyl porphyrin distributions of sediments
Comparison of nickel and vanadyl porphyrin distributions of sediments
复制标题
沉积物中镍和氧钒卟啉分布的比较
DOI：
10.1016/0016-7037(93)90078-b
复制
发表时间：
1993
影响因子：
5
通讯作者：
C. Boreham
中科院分区：
文献类型：
--
作者：
P. Sundararaman;C. Boreham
研究了北方德国和加州的Toarcian页岩中镍和钒卟啉的分布。从同一样品的提取物的镍和钒卟啉馏分的组成显示出显着的差异。镍卟啉的分布比钒卟啉的分布更复杂。虽然来自岩心的样品的钒基卟啉分布是相同的，但它们的镍卟啉组成显示出很大的变化。镍卟啉化合物富含“etio”和3-nor C30 DPEP结构.钒卟啉富集在C33 DiDPEP结构中.甲基丙烷卟啉被发现只在钒卟啉馏分，而环庚烷结构类型是占主导地位的镍馏分。C31 DPEP和C32 DPEP均存在于镍和钒基馏分中.它们在两个馏分中的相对丰度与Ni VO卟啉比率成比例。所观察到的镍和钒基卟啉馏分的组合物的差异是由于其形成从pheopigments的速率常数的差异。
The distributions of nickel and vanadyl porphyrins of Toarcian shale, northern Germany, and the Monterey Formation, California, were examined. The compositions of nickel and vanadyl porphyrin fractions of extracts from the same sample show substantial differences. The nickel porphyrin distribution is more complex than the vanadyl porphyrin distribution. While the vanadyl porphyrin distributions of samples from a core are the same, their nickel porphyrin compositions show wide variations. The nickel porphyrins are enriched in “etio” and 3-nor C 30 DPEP structures. The vanadyl porphyrins are enriched in the C 33 DiDPEP structure. Methylpropano porphyrins are found only in the vanadyl porphyrin fraction, whereas the cycloheptano structural type is predominant in the nickel fraction. C 31 DPEP and C 32 DPEP are found both in the nickel and vanadyl fractions. Their relative abundance in the two fractions is proportional to the Ni VO porphyrin ratio. The observed differences in the compositions of nickel and vanadyl porphyrin fractions are due to differences in the rate constants for their formation from the pheopigments.