Page 180 - Geochemical Anomaly and Mineral Prospectivity Mapping in GIS

Analysis of Geologic Controls on Mineral Occurrence 181

Fig. 6-15. Plots of r d jx d jy (Pearson r) versus Y j (distances from linear geological features) with

respect to an arbitrary point (AP), depicting spatial associations between centroids of Nabongsoran
Andesite porphyry and intersections of NNW- and NW-trending faults/fractures in the Aroroy
district (Philippines), based on (A) centre AP, (B) north AP, (C) northeast AP, (D) east AP, (E)
southeast AP, (F) south AP, (G) southwest AP, (H) west AP and (I) northwest AP. A dot along
some of the plots represents the distance Y max at which r d jx d jy is highest and, thus, the
j
r
distance of optimal spatial association between centroids of Nabongsoran Andesite porphyry and
intersections of NNW- and NW-trending faults/fractures.

centroids of mapped units of Nabongsoran Andesite porphyry and their respective
nearest neighbour intersection of NNW- and NW-trending faults/fractures. The positive
spatial association is optimal within 0.7 km of intersections NNW- and NW-trending