Hi, you will know when you find the right pan, it will feel right when you use it. But there in is the trick not so much in its use but more so in and where you use it. What AtomRat posted is quite right
{ If I find a good spot, ill plan a day and then take in the sluice and big equipment. But no point taking that until you find where you need to dig for bigger yield. Many days of walking and digging nothing. } I work in the same manner. I can spend up to 12 months testing an area before starting to work that area. I map and record my test areas within the field, after a few trips to the field I note that 9 out of 10 times there will be a Pattern starting to take shape. I have complied a bit of information which may help you in your quest.
DESCRIPTIONS OF ALLUVIAL BOTTOMS,
CLAY BOTTOMS.
Some clay bottoms consist of a darkish red tough clay. This
sort of bottom is often met with where surface gold is got; although
it may change in a few yards distance to a finer texture, bearing the
appearance of greasy soft slate clay. On this sort of bottom,
especially if the color of same bear the resemblance of gamboge, {see note}
good patches of the precious metal may result where that sort of
bottom exists. Most likely farther on either soft or hard slate will
be found; the softer such bottoms are, the deeper the gold will
extend, because it sinks downwards in such cases. Crab holes
must be well picked up, as pockets of rich gold are frequently
deposited therein. Such bottoms are usually met with near the
surface, where the hard slates are not a prominent feature. Pipe
clay is also a grand bottom for containing gold, the color of which
may vary from white to light blue, sometimes it is of a yellowish
cast. Gold sometimes follows the small quartz veins often met
with in such bottoms, and may extend several feet in depth ; much
heavy gold has been found where the aforesaid sort of bottoms
exist, A black clay may also be a bottom in shallow sinking, most
likely near creeks or in gullies only, the wash dirt will contain the
chief portion of gold on such a bottom. Black clay is not an
unusual bottom, and in sinking deeper shafts, sand and gravel will
be met with under this clay. Sometimes black clay is only a false
bottom, and may also carry gold on top of it, the same as some of
the tough red clays. Such clay bottoms are usually near the surface,
except where deeper sinking takes place, in which case they are not
reckoned to be bottoms, either false or otherwise. Should clay of
an impenetrable character be lodged near the real bottom, some
times a little gold is lodged on the top of it, most likely in sand or
gravel.
SLATE BOTTOMS.
Slate is one of the best bottoms for alluvial gold, but when
found to be in flat layers it is not a bottom, and must be gone
through just the same as any other strata, until edge reef is reached.
Most reefs standing edge upwards run north and south ; although
here and there the direction may vary a few points westerly or
easterly. Sometimes an exception to this rule occurs. Slate may
be hard or soft, and is often mixed up with pipe clays. Where gold
is prevalent make sure to examine closely the interstices between
slate slabs joining each other, as gold frequently finds its way along
with greasy clays attached to the sides of such slates. Gold may
be scraped off slabs with a butchers knife. Where bard close slate
exists, the gold is chiefly on the top of the slate ; in which case the
easiest plan is to chip up a few inches of same. Some merely
scrape the reef with a knife, sweeping up carefully such scrapings.
Where light brown and yellowish fine greasy sort of clays and soft
slates are, a deeper deposit of gold takes place. Remember that
only properly defined edge slate reefs constitute, the real bottom.
A ledge or slip of reef shot over, although horizontally placed, is
not a bottom, the wash dirt often being underneath this. As reefs
rise and dip on the surface, so do they likewise underneath the
surface, and at various depths. Frequently parallel with the slate
reefs sandstone may be found, and good gold may be looked for
at the junction. Much gold has often been obtained where quartz
adjoins slate reefs; the quartz alluded to means quartz reefs and
quartz veins.
SANDSTONE.
Where sandstone is the bottom a larger quantity of wash dirt
may be looked for, and the gold does not sink to any great depth,
except the sandstone be very soft. This sort of bottom is often
found in creeks, and may alternate at several yards distance to
slate, or even granite bottoms. In sinking shafts or excavating
paddocks, special attention is called to the fact, that in some parts
where alluvial gold is obtained, sandstone boulders may be
immediately lodged on the top of the wash dirt. In certain parts
where leads of gold exist pipe clay may also have to be gone
through, more especially if no edge reef appears. Some sandstone
boulders are very large, and great care should be taken not to
mistake such for the real bottom.
GRANITE.
Treat granite reefs about the same as the sandstone reefs.
Some very good patches of gold have been obtained where the
granite is of a soft nature, and the wash dirt on such reefs generally
contains the most of the gold, especially if the bottom is hard.
WASH DIRT.
On approaching the bottom of whatever sort, try your depth of
wash dirt and classify it accordingly. In driving over the wash
dirtviz. taking out the headings first-be careful to wash or
scrape all quartz or other large stone contained in the wash dirt, as
gold is often attached to the same when much gravel is found.
Where the cement is lodged on the bottom, pay attention to the
depth of same containing gold. Most likely the chief portion of
the precious metal will be found in the cement adhering to the bottom,
and in the latter, black gold may be looked for in cement,
and care must be taken, as it may easily be mistaken for worthless
ironstone. Neverthless, should the gold be chiefly in the bottom,
it will bear its usual color, or have a reddish tinge. Cement wash
dirt frequently has a soft slate or pipe clay for its bottom, yet hard
slate and sandstone may be covered with cement; under such
circumstances look well after the crevices in the reefs.
Sometimes gold has been found on the top of the headings
where clay preponderates, more especially if reefs rise abruptly in
your drive. Sometimes the gold keeps the level of the said reefs
for a time only. Generally on the top of the higher parts of your
claim, clays of different colors, without any wash dirt, may be
lodged, and frequently the heaviest nuggets have been found under
such circumstances. In some instances clay and sand strata may
descend right to the bottom, in such cases most likely very little
gold will be lodged there, it having been swept farther on in the
deeper channels, gutters are here alluded to.
Miners must not be discouraged by not finding the gold evenly
distributed, as it often skips a few feet or more ; hence one party
may leave a claim, and another miner may drive only a few feet
ahead and get payable gold, where leads are ; patient perseverance
is crowned with success.
From the book
The Gold Diggers Guide
or
PRACTICAL MINING MADE EASY
by
H . V. ROGERS
Second Edition. 1894
http://handle.slv.vic.gov.au/10381/244331
Note: Gamboge is a partially transparent deep saffron to mustard yellow pigment.